Make API CTF-agnostic
[babeltrace.git] / plugins / ctf / common / notif-iter / notif-iter.c
index 0c1d75728d3201a60c1953170c70a838c266aa8b..5927285901469f46a8153aef62ad4800202b7b91 100644 (file)
@@ -1,8 +1,8 @@
 /*
  * Babeltrace - CTF notification iterator
  *
- * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation
- * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com>
+ * Copyright (c) 2015-2018 EfficiOS Inc. and Linux Foundation
+ * Copyright (c) 2015-2018 Philippe Proulx <pproulx@efficios.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -58,7 +58,7 @@ struct stack_entry {
         */
        struct bt_field *base;
 
-       /* index of next field to set */
+       /* Index of next field to set */
        size_t index;
 };
 
@@ -82,13 +82,13 @@ enum state {
        STATE_AFTER_STREAM_PACKET_CONTEXT,
        STATE_EMIT_NOTIF_NEW_STREAM,
        STATE_EMIT_NOTIF_NEW_PACKET,
-       STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN,
-       STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE,
-       STATE_AFTER_STREAM_EVENT_HEADER,
-       STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN,
-       STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE,
-       STATE_DSCOPE_EVENT_CONTEXT_BEGIN,
-       STATE_DSCOPE_EVENT_CONTEXT_CONTINUE,
+       STATE_DSCOPE_EVENT_HEADER_BEGIN,
+       STATE_DSCOPE_EVENT_HEADER_CONTINUE,
+       STATE_AFTER_EVENT_HEADER,
+       STATE_DSCOPE_EVENT_COMMON_CONTEXT_BEGIN,
+       STATE_DSCOPE_EVENT_COMMON_CONTEXT_CONTINUE,
+       STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN,
+       STATE_DSCOPE_EVENT_SPEC_CONTEXT_CONTINUE,
        STATE_DSCOPE_EVENT_PAYLOAD_BEGIN,
        STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE,
        STATE_EMIT_NOTIF_EVENT,
@@ -97,45 +97,6 @@ enum state {
        STATE_SKIP_PACKET_PADDING,
 };
 
-struct trace_field_path_cache {
-       /*
-        * Indexes of the stream_id and stream_instance_id field in the packet
-        * header structure, -1 if unset.
-        */
-       int stream_id;
-       int stream_instance_id;
-};
-
-struct stream_class_field_path_cache {
-       /*
-        * Indexes of the v and id fields in the stream event header structure,
-        * -1 if unset.
-        */
-       int v;
-       int id;
-
-       /*
-        * index of the timestamp_end, packet_size and content_size fields in
-        * the stream packet context structure. Set to -1 if the fields were
-        * not found.
-        */
-       int timestamp_end;
-       int packet_size;
-       int content_size;
-};
-
-struct field_cb_override {
-       enum bt_btr_status (* func)(void *value,
-                       struct bt_field_type *type, void *data);
-       void *data;
-};
-
-/* Clock value: clock class and raw value */
-struct clock_value {
-       struct bt_clock_class *clock_class; /* Weak */
-       uint64_t raw_value;
-};
-
 /* CTF notification iterator */
 struct bt_notif_iter {
        /* Visit stack */
@@ -152,11 +113,17 @@ struct bt_notif_iter {
         */
        struct bt_field *cur_dscope_field;
 
-       /* Trace and classes (owned by this) */
+       /*
+        * True if we're done filling a string field from a text
+        * array/sequence payload.
+        */
+       bool done_filling_string;
+
+       /* Trace and classes */
        struct {
-               struct bt_trace *trace;
-               struct bt_stream_class *stream_class;
-               struct bt_event_class *event_class;
+               struct ctf_trace_class *tc;
+               struct ctf_stream_class *sc;
+               struct ctf_event_class *ec;
        } meta;
 
        /* Current packet header field wrapper (NULL if not created yet) */
@@ -171,12 +138,6 @@ struct bt_notif_iter {
        /* Current packet (NULL if not created yet) */
        struct bt_packet *packet;
 
-       /* Previous packet availability */
-       enum bt_packet_previous_packet_availability prev_packet_avail;
-
-       /* Previous packet (NULL if not available) */
-       struct bt_packet *prev_packet;
-
        /* Current stream (NULL if not set yet) */
        struct bt_stream *stream;
 
@@ -186,39 +147,16 @@ struct bt_notif_iter {
        /* Current event notification (NULL if not created yet) */
        struct bt_notification *event_notif;
 
-       /*
-        * Current `timestamp_end` field (to consider before switching
-        * packets). If it's set, it's a field which is within
-        * `dscopes.stream_packet_context` below, which is in `packet`
-        * above.
-        */
-       struct bt_field *cur_timestamp_end;
-
-       /* Database of current dynamic scopes (owned by this) */
+       /* Database of current dynamic scopes */
        struct {
                struct bt_field *trace_packet_header;
                struct bt_field *stream_packet_context;
-               struct bt_field *stream_event_header;
-               struct bt_field *stream_event_context;
-               struct bt_field *event_context;
+               struct bt_field *event_header;
+               struct bt_field *event_common_context;
+               struct bt_field *event_spec_context;
                struct bt_field *event_payload;
        } dscopes;
 
-       /*
-        * Special field overrides.
-        *
-        * Overrides are used to implement the behaviours of special fields such
-        * as "timestamp_end" (which must be ignored until the end of the
-        * packet), "id" (event id) which can be present multiple times and must
-        * be updated multiple time.
-        *
-        * This should be used to implement the behaviour of integer fields
-        * mapped to clocks and other "tagged" fields (in CTF 2).
-        *
-        * bt_field_type to struct field_cb_override
-        */
-       GHashTable *field_overrides;
-
        /* Current state */
        enum state state;
 
@@ -254,34 +192,39 @@ struct bt_notif_iter {
        bool stream_begin_emitted;
 
        /* Current packet size (bits) (-1 if unknown) */
-       int64_t cur_packet_size;
+       int64_t cur_exp_packet_total_size;
 
        /* Current content size (bits) (-1 if unknown) */
-       int64_t cur_content_size;
+       int64_t cur_exp_packet_content_size;
 
-       /*
-        * Offset, in the underlying media, of the current packet's start
-        * (-1 if unknown).
-        */
-       off_t cur_packet_offset;
+       /* Current stream class ID */
+       int64_t cur_stream_class_id;
 
-       /* bt_clock_class to uint64_t. */
-       GHashTable *clock_states;
+       /* Current event class ID */
+       int64_t cur_event_class_id;
 
-       /*
-        * Cache of the trace-constant field paths (event header type)
-        * associated to the current trace.
-        */
-       struct trace_field_path_cache trace_field_path_cache;
+       /* Current data stream ID */
+       int64_t cur_data_stream_id;
 
        /*
-        * Field path cache associated with the current stream class.
-        * Ownership of this structure belongs to the field_path_caches HT.
+        * Offset, in the underlying media, of the current packet's
+        * start (-1 if unknown).
         */
-       struct stream_class_field_path_cache *cur_sc_field_path_cache;
+       off_t cur_packet_offset;
+
+       /* Default clock's current value */
+       uint64_t default_clock_val;
 
-       /* bt_stream_class to struct stream_class_field_path_cache. */
-       GHashTable *sc_field_path_caches;
+       /* End of packet snapshots */
+       struct {
+               uint64_t discarded_events;
+               uint64_t packets;
+               uint64_t beginning_clock;
+               uint64_t end_clock;
+       } snapshots;
+
+       /* Stored values (for sequence lengths, variant tags) */
+       GArray *stored_values;
 };
 
 static inline
@@ -306,20 +249,20 @@ const char *state_string(enum state state)
                return "STATE_EMIT_NOTIF_NEW_PACKET";
        case STATE_EMIT_NOTIF_NEW_STREAM:
                return "STATE_EMIT_NOTIF_NEW_STREAM";
-       case STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN:
-               return "STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN";
-       case STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE:
-               return "STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE";
-       case STATE_AFTER_STREAM_EVENT_HEADER:
-               return "STATE_AFTER_STREAM_EVENT_HEADER";
-       case STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN:
-               return "STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN";
-       case STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE:
-               return "STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE";
-       case STATE_DSCOPE_EVENT_CONTEXT_BEGIN:
-               return "STATE_DSCOPE_EVENT_CONTEXT_BEGIN";
-       case STATE_DSCOPE_EVENT_CONTEXT_CONTINUE:
-               return "STATE_DSCOPE_EVENT_CONTEXT_CONTINUE";
+       case STATE_DSCOPE_EVENT_HEADER_BEGIN:
+               return "STATE_DSCOPE_EVENT_HEADER_BEGIN";
+       case STATE_DSCOPE_EVENT_HEADER_CONTINUE:
+               return "STATE_DSCOPE_EVENT_HEADER_CONTINUE";
+       case STATE_AFTER_EVENT_HEADER:
+               return "STATE_AFTER_EVENT_HEADER";
+       case STATE_DSCOPE_EVENT_COMMON_CONTEXT_BEGIN:
+               return "STATE_DSCOPE_EVENT_COMMON_CONTEXT_BEGIN";
+       case STATE_DSCOPE_EVENT_COMMON_CONTEXT_CONTINUE:
+               return "STATE_DSCOPE_EVENT_COMMON_CONTEXT_CONTINUE";
+       case STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN:
+               return "STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN";
+       case STATE_DSCOPE_EVENT_SPEC_CONTEXT_CONTINUE:
+               return "STATE_DSCOPE_EVENT_SPEC_CONTEXT_CONTINUE";
        case STATE_DSCOPE_EVENT_PAYLOAD_BEGIN:
                return "STATE_DSCOPE_EVENT_PAYLOAD_BEGIN";
        case STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE:
@@ -340,10 +283,6 @@ const char *state_string(enum state state)
 static
 int bt_notif_iter_switch_packet(struct bt_notif_iter *notit);
 
-static
-enum bt_btr_status btr_timestamp_end_cb(void *value,
-               struct bt_field_type *type, void *data);
-
 static
 struct stack *stack_new(struct bt_notif_iter *notit)
 {
@@ -362,11 +301,14 @@ struct stack *stack_new(struct bt_notif_iter *notit)
        }
 
        BT_LOGD("Created stack: notit-addr=%p, stack-addr=%p", notit, stack);
-       return stack;
+       goto end;
 
 error:
        g_free(stack);
-       return NULL;
+       stack = NULL;
+
+end:
+       return stack;
 }
 
 static
@@ -383,7 +325,7 @@ void stack_destroy(struct stack *stack)
 }
 
 static
-int stack_push(struct stack *stack, struct bt_field *base)
+void stack_push(struct stack *stack, struct bt_field *base)
 {
        struct stack_entry *entry;
 
@@ -401,7 +343,6 @@ int stack_push(struct stack *stack, struct bt_field *base)
        entry->base = base;
        entry->index = 0;
        stack->size++;
-       return 0;
 }
 
 static inline
@@ -448,6 +389,7 @@ static inline
 enum bt_notif_iter_status notif_iter_status_from_m_status(
                enum bt_notif_iter_medium_status m_status)
 {
+       /* They are the same */
        return (int) m_status;
 }
 
@@ -521,8 +463,9 @@ enum bt_notif_iter_status request_medium_bytes(
                 * in the middle of a packet header, packet context, or
                 * event.
                 */
-               if (notit->cur_packet_size >= 0) {
-                       if (packet_at(notit) == notit->cur_packet_size) {
+               if (notit->cur_exp_packet_total_size >= 0) {
+                       if (packet_at(notit) ==
+                                       notit->cur_exp_packet_total_size) {
                                goto end;
                        }
                } else {
@@ -542,7 +485,7 @@ enum bt_notif_iter_status request_medium_bytes(
                        "packet-cur=%zu, last-eh-at=%zu",
                        bt_notif_iter_medium_status_string(m_status),
                        state_string(notit->state),
-                       notit->cur_packet_size,
+                       notit->cur_exp_packet_total_size,
                        notit->buf.at, packet_at(notit),
                        notit->buf.last_eh_at);
                m_status = BT_NOTIF_ITER_MEDIUM_STATUS_ERROR;
@@ -561,7 +504,7 @@ enum bt_notif_iter_status buf_ensure_available_bits(
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
 
-       if (buf_available_bits(notit) == 0) {
+       if (unlikely(buf_available_bits(notit) == 0)) {
                /*
                 * This _cannot_ return BT_NOTIF_ITER_STATUS_OK
                 * _and_ no bits.
@@ -572,18 +515,10 @@ enum bt_notif_iter_status buf_ensure_available_bits(
        return status;
 }
 
-static inline
-void reset_clock_value(struct clock_value *cv)
-{
-       BT_ASSERT(cv);
-       cv->clock_class = NULL;
-       cv->raw_value = UINT64_C(-1);
-}
-
 static
 enum bt_notif_iter_status read_dscope_begin_state(
                struct bt_notif_iter *notit,
-               struct bt_field_type *dscope_field_type,
+               struct ctf_field_type *dscope_ft,
                enum state done_state, enum state continue_state,
                struct bt_field *dscope_field)
 {
@@ -593,8 +528,8 @@ enum bt_notif_iter_status read_dscope_begin_state(
 
        notit->cur_dscope_field = dscope_field;
        BT_LOGV("Starting BTR: notit-addr=%p, btr-addr=%p, ft-addr=%p",
-               notit, notit->btr, dscope_field_type);
-       consumed_bits = bt_btr_start(notit->btr, dscope_field_type,
+               notit, notit->btr, dscope_ft);
+       consumed_bits = bt_btr_start(notit->btr, dscope_ft,
                notit->buf.addr, notit->buf.at, packet_at(notit),
                notit->buf.sz, &btr_status);
        BT_LOGV("BTR consumed bits: size=%zu", consumed_bits);
@@ -650,7 +585,6 @@ enum bt_notif_iter_status read_dscope_continue_state(
                goto end;
        }
 
-
        consumed_bits = bt_btr_continue(notit->btr, notit->buf.addr,
                notit->buf.sz, &btr_status);
        BT_LOGV("BTR consumed bits: size=%zu", consumed_bits);
@@ -682,15 +616,15 @@ end:
 static
 void release_event_dscopes(struct bt_notif_iter *notit)
 {
-       notit->dscopes.stream_event_header = NULL;
+       notit->dscopes.event_header = NULL;
 
        if (notit->event_header_field) {
                bt_event_header_field_release(notit->event_header_field);
                notit->event_header_field = NULL;
        }
 
-       notit->dscopes.stream_event_context = NULL;
-       notit->dscopes.event_context = NULL;
+       notit->dscopes.event_common_context = NULL;
+       notit->dscopes.event_spec_context = NULL;
        notit->dscopes.event_payload = NULL;
 }
 
@@ -718,7 +652,7 @@ static
 enum bt_notif_iter_status read_packet_header_begin_state(
                struct bt_notif_iter *notit)
 {
-       struct bt_field_type *packet_header_type = NULL;
+       struct ctf_field_type *packet_header_ft = NULL;
        enum bt_notif_iter_status ret = BT_NOTIF_ITER_STATUS_OK;
 
        if (bt_notif_iter_switch_packet(notit)) {
@@ -728,40 +662,46 @@ enum bt_notif_iter_status read_packet_header_begin_state(
        }
 
        /* Packet header type is common to the whole trace. */
-       packet_header_type = bt_trace_borrow_packet_header_field_type(
-                       notit->meta.trace);
-       if (!packet_header_type) {
+       packet_header_ft = notit->meta.tc->packet_header_ft;
+       if (!packet_header_ft) {
                notit->state = STATE_AFTER_TRACE_PACKET_HEADER;
                goto end;
        }
 
-       /*
-        * Create free packet header field from trace. This field is
-        * going to be moved to the packet once we create it. We cannot
-        * create the packet now because:
-        *
-        * 1. A packet is created from a stream.
-        * 2. A stream is created from a stream class.
-        * 3. We need the packet header field's content to know the ID
-        *    of the stream class to select.
-        */
        BT_ASSERT(!notit->packet_header_field);
-       notit->packet_header_field = bt_trace_create_packet_header_field(
-               notit->meta.trace);
-       if (!notit->packet_header_field) {
-               BT_LOGE_STR("Cannot create packet header field wrapper from trace.");
-               ret = BT_NOTIF_ITER_STATUS_ERROR;
-               goto end;
+
+       if (packet_header_ft->in_ir) {
+               /*
+                * Create free packet header field from trace. This
+                * field is going to be moved to the packet once we
+                * create it. We cannot create the packet now because:
+                *
+                * 1. A packet is created from a stream.
+                * 2. A stream is created from a stream class.
+                * 3. We need the packet header field's content to know
+                *    the ID of the stream class to select.
+                */
+               notit->packet_header_field = bt_packet_header_field_create(
+                       notit->meta.tc->ir_tc);
+               if (!notit->packet_header_field) {
+                       BT_LOGE_STR("Cannot create packet header field wrapper from trace.");
+                       ret = BT_NOTIF_ITER_STATUS_ERROR;
+                       goto end;
+               }
+
+               notit->dscopes.trace_packet_header =
+                       bt_packet_header_field_borrow_field(notit->packet_header_field);
+               BT_ASSERT(notit->dscopes.trace_packet_header);
        }
 
-       notit->dscopes.trace_packet_header =
-               bt_packet_header_field_borrow_field(notit->packet_header_field);
-       BT_ASSERT(notit->dscopes.trace_packet_header);
+       notit->cur_stream_class_id = -1;
+       notit->cur_event_class_id = -1;
+       notit->cur_data_stream_id = -1;
        BT_LOGV("Decoding packet header field:"
                "notit-addr=%p, trace-addr=%p, trace-name=\"%s\", ft-addr=%p",
-               notit, notit->meta.trace,
-               bt_trace_get_name(notit->meta.trace), packet_header_type);
-       ret = read_dscope_begin_state(notit, packet_header_type,
+               notit, notit->meta.tc,
+               notit->meta.tc->name->str, packet_header_ft);
+       ret = read_dscope_begin_state(notit, packet_header_ft,
                STATE_AFTER_TRACE_PACKET_HEADER,
                STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE,
                notit->dscopes.trace_packet_header);
@@ -769,9 +709,9 @@ enum bt_notif_iter_status read_packet_header_begin_state(
                BT_LOGW("Cannot decode packet header field: "
                        "notit-addr=%p, trace-addr=%p, "
                        "trace-name=\"%s\", ft-addr=%p",
-                       notit, notit->meta.trace,
-                       bt_trace_get_name(notit->meta.trace),
-                       packet_header_type);
+                       notit, notit->meta.tc,
+                       notit->meta.tc->name->str,
+                       packet_header_ft);
        }
 
 end:
@@ -783,314 +723,76 @@ enum bt_notif_iter_status read_packet_header_continue_state(
                struct bt_notif_iter *notit)
 {
        return read_dscope_continue_state(notit,
-                       STATE_AFTER_TRACE_PACKET_HEADER);
-}
-
-static
-struct stream_class_field_path_cache *
-create_stream_class_field_path_cache_entry(
-               struct bt_notif_iter *notit,
-               struct bt_stream_class *stream_class)
-{
-       int v = -1;
-       int id = -1;
-       int timestamp_end = -1;
-       int packet_size = -1;
-       int content_size = -1;
-       struct stream_class_field_path_cache *cache_entry = g_new0(
-                       struct stream_class_field_path_cache, 1);
-       struct bt_field_type *event_header = NULL, *packet_context = NULL;
-
-       if (!cache_entry) {
-               BT_LOGE_STR("Failed to allocate one stream class field path cache.");
-               goto end;
-       }
-
-       event_header = bt_stream_class_borrow_event_header_field_type(
-               stream_class);
-       if (event_header && bt_field_type_is_structure(event_header)) {
-               int i, count;
-
-               count = bt_field_type_structure_get_field_count(
-                       event_header);
-               BT_ASSERT(count >= 0);
-
-               for (i = 0; i < count; i++) {
-                       int ret;
-                       const char *name;
-
-                       ret = bt_field_type_structure_borrow_field_by_index(
-                                       event_header, &name, NULL, i);
-                       if (ret) {
-                               BT_LOGE("Cannot get event header structure field type's field: "
-                                       "notit-addr=%p, stream-class-addr=%p, "
-                                       "stream-class-name=\"%s\", "
-                                       "stream-class-id=%" PRId64 ", "
-                                       "ft-addr=%p, index=%d",
-                                       notit, stream_class,
-                                       bt_stream_class_get_name(stream_class),
-                                       bt_stream_class_get_id(stream_class),
-                                       event_header, i);
-                               goto error;
-                       }
-
-                       if (v != -1 && id != -1) {
-                               break;
-                       }
-
-                       if (v == -1 && strcmp(name, "v") == 0) {
-                               v = i;
-                       } else if (id == -1 && !strcmp(name, "id")) {
-                               id = i;
-                       }
-               }
-       }
-
-       packet_context = bt_stream_class_borrow_packet_context_field_type(
-                       stream_class);
-       if (packet_context && bt_field_type_is_structure(packet_context)) {
-               int i, count;
-
-               count = bt_field_type_structure_get_field_count(
-                       packet_context);
-               BT_ASSERT(count >= 0);
-
-               for (i = 0; i < count; i++) {
-                       int ret;
-                       const char *name;
-                       struct bt_field_type *field_type;
-
-                       if (timestamp_end != -1 && packet_size != -1 &&
-                                       content_size != -1) {
-                               break;
-                       }
-
-                       ret = bt_field_type_structure_borrow_field_by_index(
-                                       packet_context, &name, &field_type, i);
-                       if (ret) {
-                               BT_LOGE("Cannot get packet context structure field type's field: "
-                                       "notit-addr=%p, stream-class-addr=%p, "
-                                       "stream-class-name=\"%s\", "
-                                       "stream-class-id=%" PRId64 ", "
-                                       "ft-addr=%p, index=%d",
-                                       notit, stream_class,
-                                       bt_stream_class_get_name(stream_class),
-                                       bt_stream_class_get_id(stream_class),
-                                       event_header, i);
-                               goto error;
-                       }
-
-                       if (timestamp_end == -1 &&
-                                       strcmp(name, "timestamp_end") == 0) {
-                               struct field_cb_override *override = g_new0(
-                                               struct field_cb_override, 1);
-
-                               if (!override) {
-                                       goto error;
-                               }
-
-                               override->func = btr_timestamp_end_cb;
-                               override->data = notit;
-                               g_hash_table_insert(notit->field_overrides,
-                                       field_type, override);
-                               timestamp_end = i;
-                       } else if (packet_size == -1 &&
-                                       !strcmp(name, "packet_size")) {
-                               packet_size = i;
-                       } else if (content_size == -1 &&
-                                       !strcmp(name, "content_size")) {
-                               content_size = i;
-                       }
-               }
-       }
-
-       cache_entry->v = v;
-       cache_entry->id = id;
-       cache_entry->timestamp_end = timestamp_end;
-       cache_entry->packet_size = packet_size;
-       cache_entry->content_size = content_size;
-
-end:
-       return cache_entry;
-
-error:
-       g_free(cache_entry);
-       cache_entry = NULL;
-       goto end;
-}
-
-static
-struct stream_class_field_path_cache *get_stream_class_field_path_cache(
-               struct bt_notif_iter *notit,
-               struct bt_stream_class *stream_class)
-{
-       bool cache_entry_found;
-       struct stream_class_field_path_cache *cache_entry;
-
-       cache_entry_found = g_hash_table_lookup_extended(
-                       notit->sc_field_path_caches,
-                       stream_class, NULL, (gpointer) &cache_entry);
-       if (unlikely(!cache_entry_found)) {
-               cache_entry = create_stream_class_field_path_cache_entry(notit,
-                       stream_class);
-               g_hash_table_insert(notit->sc_field_path_caches,
-                       stream_class, (gpointer) cache_entry);
-       }
-
-       return cache_entry;
+               STATE_AFTER_TRACE_PACKET_HEADER);
 }
 
 static inline
-enum bt_notif_iter_status set_current_stream_class(
-               struct bt_notif_iter *notit)
+enum bt_notif_iter_status set_current_stream_class(struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *packet_header_type = NULL;
-       struct bt_field_type *stream_id_field_type = NULL;
-       struct bt_stream_class *new_stream_class = NULL;
-       uint64_t stream_id;
-
-       /* Clear the current stream class field path cache. */
-       notit->cur_sc_field_path_cache = NULL;
-
-       /* Is there any "stream_id" field in the packet header? */
-       packet_header_type = bt_trace_borrow_packet_header_field_type(
-               notit->meta.trace);
-       if (!packet_header_type) {
+       struct ctf_stream_class *new_stream_class = NULL;
+
+       if (notit->cur_stream_class_id == -1) {
                /*
-                * No packet header, therefore no `stream_id` field,
-                * therefore only one stream class.
+                * No current stream class ID field, therefore only one
+                * stream class.
                 */
-               goto single_stream_class;
-       }
-
-       BT_ASSERT(bt_field_type_is_structure(packet_header_type));
-
-       // TODO: optimalize!
-       stream_id_field_type =
-               bt_field_type_structure_borrow_field_type_by_name(
-                       packet_header_type, "stream_id");
-       if (stream_id_field_type) {
-               /* Find appropriate stream class using current stream ID */
-               int ret;
-               struct bt_field *stream_id_field = NULL;
-
-               BT_ASSERT(notit->dscopes.trace_packet_header);
+               if (notit->meta.tc->stream_classes->len != 1) {
+                       BT_LOGW("Need exactly one stream class since there's "
+                               "no stream class ID field: "
+                               "notit-addr=%p, trace-name=\"%s\"",
+                               notit, notit->meta.tc->name->str);
+                       status = BT_NOTIF_ITER_STATUS_ERROR;
+                       goto end;
+               }
 
-               // TODO: optimalize!
-               stream_id_field = bt_field_structure_borrow_field_by_name(
-                               notit->dscopes.trace_packet_header, "stream_id");
-               BT_ASSERT(stream_id_field);
-               ret = bt_field_integer_unsigned_get_value(
-                               stream_id_field, &stream_id);
-               BT_ASSERT(!ret);
-       } else {
-single_stream_class:
-               /* Only one stream: pick the first stream class */
-               BT_ASSERT(bt_trace_get_stream_class_count(
-                               notit->meta.trace) == 1);
-               stream_id = 0;
+               new_stream_class = notit->meta.tc->stream_classes->pdata[0];
+               notit->cur_stream_class_id = new_stream_class->id;
+               goto end;
        }
 
-       BT_LOGV("Found stream class ID to use: notit-addr=%p, "
-               "stream-class-id=%" PRIu64 ", "
-               "trace-addr=%p, trace-name=\"%s\"",
-               notit, stream_id, notit->meta.trace,
-               bt_trace_get_name(notit->meta.trace));
-
-       new_stream_class = bt_trace_borrow_stream_class_by_id(
-               notit->meta.trace, stream_id);
+       new_stream_class = ctf_trace_class_borrow_stream_class_by_id(
+               notit->meta.tc, notit->cur_stream_class_id);
        if (!new_stream_class) {
                BT_LOGW("No stream class with ID of stream class ID to use in trace: "
                        "notit-addr=%p, stream-class-id=%" PRIu64 ", "
                        "trace-addr=%p, trace-name=\"%s\"",
-                       notit, stream_id, notit->meta.trace,
-                       bt_trace_get_name(notit->meta.trace));
+                       notit, notit->cur_stream_class_id, notit->meta.tc,
+                       notit->meta.tc->name->str);
                status = BT_NOTIF_ITER_STATUS_ERROR;
                goto end;
        }
 
-       if (notit->meta.stream_class) {
-               if (new_stream_class != notit->meta.stream_class) {
+       if (notit->meta.sc) {
+               if (new_stream_class != notit->meta.sc) {
                        BT_LOGW("Two packets refer to two different stream classes within the same packet sequence: "
                                "notit-addr=%p, prev-stream-class-addr=%p, "
-                               "prev-stream-class-name=\"%s\", "
                                "prev-stream-class-id=%" PRId64 ", "
                                "next-stream-class-addr=%p, "
-                               "next-stream-class-name=\"%s\", "
                                "next-stream-class-id=%" PRId64 ", "
                                "trace-addr=%p, trace-name=\"%s\"",
-                               notit, notit->meta.stream_class,
-                               bt_stream_class_get_name(notit->meta.stream_class),
-                               bt_stream_class_get_id(notit->meta.stream_class),
+                               notit, notit->meta.sc,
+                               notit->meta.sc->id,
                                new_stream_class,
-                               bt_stream_class_get_name(new_stream_class),
-                               bt_stream_class_get_id(new_stream_class),
-                               notit->meta.trace,
-                               bt_trace_get_name(notit->meta.trace));
+                               new_stream_class->id,
+                               notit->meta.tc,
+                               notit->meta.tc->name->str);
                        status = BT_NOTIF_ITER_STATUS_ERROR;
                        goto end;
                }
        } else {
-               notit->meta.stream_class = new_stream_class;
+               notit->meta.sc = new_stream_class;
        }
 
        BT_LOGV("Set current stream class: "
                "notit-addr=%p, stream-class-addr=%p, "
-               "stream-class-name=\"%s\", stream-class-id=%" PRId64,
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class));
-
-       /*
-        * Retrieve (or lazily create) the current stream class field path
-        * cache.
-        */
-       notit->cur_sc_field_path_cache = get_stream_class_field_path_cache(
-               notit, notit->meta.stream_class);
-       if (!notit->cur_sc_field_path_cache) {
-               BT_LOGW("Cannot retrieve stream class field path from cache: "
-                       "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", stream-class-id=%" PRId64,
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class));
-               status = BT_NOTIF_ITER_STATUS_ERROR;
-               goto end;
-       }
+               "stream-class-id=%" PRId64,
+               notit, notit->meta.sc, notit->meta.sc->id);
 
 end:
        return status;
 }
 
-static inline
-uint64_t get_cur_stream_instance_id(struct bt_notif_iter *notit)
-{
-       struct bt_field *stream_instance_id_field = NULL;
-       uint64_t stream_instance_id = -1ULL;
-       int ret;
-
-       if (!notit->dscopes.trace_packet_header) {
-               goto end;
-       }
-
-       stream_instance_id_field = bt_field_structure_borrow_field_by_name(
-               notit->dscopes.trace_packet_header, "stream_instance_id");
-       if (!stream_instance_id_field) {
-               goto end;
-       }
-
-       ret = bt_field_integer_unsigned_get_value(stream_instance_id_field,
-               &stream_instance_id);
-       if (ret) {
-               stream_instance_id = -1ULL;
-               goto end;
-       }
-
-end:
-       return stream_instance_id;
-}
-
 static inline
 enum bt_notif_iter_status set_current_stream(struct bt_notif_iter *notit)
 {
@@ -1098,23 +800,23 @@ enum bt_notif_iter_status set_current_stream(struct bt_notif_iter *notit)
        struct bt_stream *stream = NULL;
 
        BT_LOGV("Calling user function (get stream): notit-addr=%p, "
-               "stream-class-addr=%p, stream-class-name=\"%s\", "
-               "stream-class-id=%" PRId64,
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class));
+               "stream-class-addr=%p, stream-class-id=%" PRId64,
+               notit, notit->meta.sc,
+               notit->meta.sc->id);
        stream = bt_get(notit->medium.medops.borrow_stream(
-               notit->meta.stream_class, get_cur_stream_instance_id(notit),
+               notit->meta.sc->ir_sc, notit->cur_data_stream_id,
                notit->medium.data));
        BT_LOGV("User function returned: stream-addr=%p", stream);
        if (!stream) {
-               BT_LOGW_STR("User function failed to return a stream object for the given stream class.");
+               BT_LOGW_STR("User function failed to return a stream object "
+                       "for the given stream class.");
                status = BT_NOTIF_ITER_STATUS_ERROR;
                goto end;
        }
 
        if (notit->stream && stream != notit->stream) {
-               BT_LOGW("User function returned a different stream than the previous one for the same sequence of packets.");
+               BT_LOGW("User function returned a different stream than the "
+                       "previous one for the same sequence of packets.");
                status = BT_NOTIF_ITER_STATUS_ERROR;
                goto end;
        }
@@ -1137,25 +839,20 @@ enum bt_notif_iter_status set_current_packet(struct bt_notif_iter *notit)
        BT_LOGV("Creating packet from stream: "
                "notit-addr=%p, stream-addr=%p, "
                "stream-class-addr=%p, "
-               "stream-class-name=\"%s\", "
                "stream-class-id=%" PRId64,
-               notit, notit->stream, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class));
+               notit, notit->stream, notit->meta.sc,
+               notit->meta.sc->id);
 
        /* Create packet */
        BT_ASSERT(notit->stream);
-       packet = bt_packet_create(notit->stream, notit->prev_packet_avail,
-               notit->prev_packet);
+       packet = bt_packet_create(notit->stream);
        if (!packet) {
                BT_LOGE("Cannot create packet from stream: "
                        "notit-addr=%p, stream-addr=%p, "
                        "stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", "
                        "stream-class-id=%" PRId64,
-                       notit, notit->stream, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class));
+                       notit, notit->stream, notit->meta.sc,
+                       notit->meta.sc->id);
                goto error;
        }
 
@@ -1192,64 +889,61 @@ enum bt_notif_iter_status read_packet_context_begin_state(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *packet_context_type;
+       struct ctf_field_type *packet_context_ft;
 
-       BT_ASSERT(notit->meta.stream_class);
-       packet_context_type = bt_stream_class_borrow_packet_context_field_type(
-               notit->meta.stream_class);
-       if (!packet_context_type) {
+       BT_ASSERT(notit->meta.sc);
+       packet_context_ft = notit->meta.sc->packet_context_ft;
+       if (!packet_context_ft) {
                BT_LOGV("No packet packet context field type in stream class: continuing: "
                        "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", stream-class-id=%" PRId64,
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class));
+                       "stream-class-id=%" PRId64,
+                       notit, notit->meta.sc,
+                       notit->meta.sc->id);
                notit->state = STATE_AFTER_STREAM_PACKET_CONTEXT;
                goto end;
        }
 
-       /*
-        * Create free packet context field from stream class. This
-        * field is going to be moved to the packet once we create it.
-        * We cannot create the packet now because a packet is created
-        * from a stream, and this API must be able to return the packet
-        * header and context fields without creating a stream
-        * (bt_notif_iter_get_packet_header_context_fields()).
-        */
        BT_ASSERT(!notit->packet_context_field);
-       notit->packet_context_field =
-               bt_stream_class_create_packet_context_field(
-                       notit->meta.stream_class);
-       if (!notit->packet_context_field) {
-               BT_LOGE_STR("Cannot create packet context field wrapper from stream class.");
-               status = BT_NOTIF_ITER_STATUS_ERROR;
-               goto end;
+
+       if (packet_context_ft->in_ir) {
+               /*
+                * Create free packet context field from stream class.
+                * This field is going to be moved to the packet once we
+                * create it. We cannot create the packet now because a
+                * packet is created from a stream, and this API must be
+                * able to return the packet header and context fields
+                * without creating a stream
+                * (bt_notif_iter_borrow_packet_header_context_fields()).
+                */
+               notit->packet_context_field =
+                       bt_packet_context_field_create(notit->meta.sc->ir_sc);
+               if (!notit->packet_context_field) {
+                       BT_LOGE_STR("Cannot create packet context field wrapper from stream class.");
+                       status = BT_NOTIF_ITER_STATUS_ERROR;
+                       goto end;
+               }
+
+               notit->dscopes.stream_packet_context =
+                       bt_packet_context_field_borrow_field(notit->packet_context_field);
+               BT_ASSERT(notit->dscopes.stream_packet_context);
        }
 
-       notit->dscopes.stream_packet_context =
-               bt_packet_context_field_borrow_field(notit->packet_context_field);
-       BT_ASSERT(notit->dscopes.stream_packet_context);
        BT_LOGV("Decoding packet context field: "
                "notit-addr=%p, stream-class-addr=%p, "
-               "stream-class-name=\"%s\", stream-class-id=%" PRId64 ", "
-               "ft-addr=%p",
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class),
-               packet_context_type);
-       status = read_dscope_begin_state(notit, packet_context_type,
+               "stream-class-id=%" PRId64 ", ft-addr=%p",
+               notit, notit->meta.sc,
+               notit->meta.sc->id, packet_context_ft);
+       status = read_dscope_begin_state(notit, packet_context_ft,
                STATE_AFTER_STREAM_PACKET_CONTEXT,
                STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE,
                notit->dscopes.stream_packet_context);
        if (status < 0) {
                BT_LOGW("Cannot decode packet context field: "
                        "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", "
                        "stream-class-id=%" PRId64 ", ft-addr=%p",
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class),
-                       packet_context_type);
+                       notit, notit->meta.sc,
+                       notit->meta.sc->id,
+                       packet_context_ft);
        }
 
 end:
@@ -1264,113 +958,47 @@ enum bt_notif_iter_status read_packet_context_continue_state(
                        STATE_AFTER_STREAM_PACKET_CONTEXT);
 }
 
-static inline
-uint64_t get_field_raw_clock_value(struct bt_field *base_field,
-               const char *field_name, struct bt_clock_class **user_cc)
-{
-       struct bt_field *field;
-       struct bt_field_type *ft;
-       struct bt_clock_class *clock_class = NULL;
-       uint64_t val = UINT64_C(-1);
-       int ret;
-
-       field = bt_field_structure_borrow_field_by_name(base_field, field_name);
-       if (!field) {
-               goto end;
-       }
-
-       ft = bt_field_borrow_type(field);
-       BT_ASSERT(ft);
-
-       if (!bt_field_type_is_integer(ft)) {
-               goto end;
-       }
-
-       clock_class = bt_field_type_integer_borrow_mapped_clock_class(ft);
-       if (!clock_class) {
-               goto end;
-       }
-
-       ret = bt_field_integer_unsigned_get_value(field, &val);
-       BT_ASSERT(ret == 0);
-
-end:
-       *user_cc = clock_class;
-       return val;
-}
-
 static
 enum bt_notif_iter_status set_current_packet_content_sizes(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field *packet_size_field = NULL;
-       struct bt_field *content_size_field = NULL;
-       uint64_t content_size = -1ULL, packet_size = -1ULL;
 
-       if (!notit->dscopes.stream_packet_context) {
-               goto end;
-       }
-
-       packet_size_field = bt_field_structure_borrow_field_by_name(
-               notit->dscopes.stream_packet_context, "packet_size");
-       content_size_field = bt_field_structure_borrow_field_by_name(
-               notit->dscopes.stream_packet_context, "content_size");
-       if (packet_size_field) {
-               int ret = bt_field_integer_unsigned_get_value(
-                       packet_size_field, &packet_size);
-
-               BT_ASSERT(ret == 0);
-               if (packet_size == 0) {
-                       BT_LOGW("Invalid packet size: packet context field indicates packet size is zero: "
-                               "notit-addr=%p, packet-context-field-addr=%p",
-                               notit, notit->dscopes.stream_packet_context);
-                       status = BT_NOTIF_ITER_STATUS_ERROR;
-                       goto end;
-               } else if ((packet_size % 8) != 0) {
-                       BT_LOGW("Invalid packet size: packet context field indicates packet size is not a multiple of 8: "
+       if (notit->cur_exp_packet_total_size == -1) {
+               if (notit->cur_exp_packet_content_size != -1) {
+                       BT_LOGW("Content size is set, but packet size is not: "
                                "notit-addr=%p, packet-context-field-addr=%p, "
-                               "packet-size=%" PRIu64,
+                               "packet-size=%" PRId64 ", content-size=%" PRId64,
                                notit, notit->dscopes.stream_packet_context,
-                               packet_size);
+                               notit->cur_exp_packet_total_size,
+                               notit->cur_exp_packet_content_size);
                        status = BT_NOTIF_ITER_STATUS_ERROR;
                        goto end;
                }
-       }
-
-       if (content_size_field) {
-               int ret = bt_field_integer_unsigned_get_value(
-                       content_size_field, &content_size);
-
-               BT_ASSERT(ret == 0);
        } else {
-               content_size = packet_size;
+               if (notit->cur_exp_packet_content_size == -1) {
+                       notit->cur_exp_packet_content_size =
+                               notit->cur_exp_packet_total_size;
+               }
        }
 
-       if (content_size > packet_size) {
-               BT_LOGW("Invalid packet or content size: packet context field indicates content size is greater than packet size: "
+       if (notit->cur_exp_packet_content_size >
+                       notit->cur_exp_packet_total_size) {
+               BT_LOGW("Invalid packet or content size: "
+                       "content size is greater than packet size: "
                        "notit-addr=%p, packet-context-field-addr=%p, "
-                       "packet-size=%" PRIu64 ", content-size=%" PRIu64,
+                       "packet-size=%" PRId64 ", content-size=%" PRId64,
                        notit, notit->dscopes.stream_packet_context,
-                       packet_size, content_size);
+                       notit->cur_exp_packet_total_size,
+                       notit->cur_exp_packet_content_size);
                status = BT_NOTIF_ITER_STATUS_ERROR;
                goto end;
        }
 
-       if (packet_size != -1ULL) {
-               notit->cur_packet_size = packet_size;
-       } else {
-               /*
-                * Use the content size as packet size indicator if the
-                * packet size field is missing. This means there is no
-                * padding in this stream.
-                */
-               notit->cur_packet_size = content_size;
-       }
-       notit->cur_content_size = content_size;
        BT_LOGV("Set current packet and content sizes: "
                "notit-addr=%p, packet-size=%" PRIu64 ", content-size=%" PRIu64,
-               notit, packet_size, content_size);
+               notit, notit->cur_exp_packet_total_size,
+               notit->cur_exp_packet_content_size);
 end:
        return status;
 }
@@ -1401,72 +1029,99 @@ enum bt_notif_iter_status read_event_header_begin_state(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *event_header_type = NULL;
+       struct ctf_field_type *event_header_ft = NULL;
 
        /* Reset the position of the last event header */
        notit->buf.last_eh_at = notit->buf.at;
+       notit->cur_event_class_id = -1;
 
        /* Check if we have some content left */
-       if (notit->cur_content_size >= 0) {
-               if (packet_at(notit) == notit->cur_content_size) {
+       if (notit->cur_exp_packet_content_size >= 0) {
+               if (unlikely(packet_at(notit) ==
+                               notit->cur_exp_packet_content_size)) {
                        /* No more events! */
                        BT_LOGV("Reached end of packet: notit-addr=%p, "
                                "cur=%zu", notit, packet_at(notit));
                        notit->state = STATE_EMIT_NOTIF_END_OF_PACKET;
                        goto end;
-               } else if (packet_at(notit) > notit->cur_content_size) {
+               } else if (unlikely(packet_at(notit) >
+                               notit->cur_exp_packet_content_size)) {
                        /* That's not supposed to happen */
                        BT_LOGV("Before decoding event header field: cursor is passed the packet's content: "
                                "notit-addr=%p, content-size=%" PRId64 ", "
-                               "cur=%zu", notit, notit->cur_content_size,
+                               "cur=%zu", notit,
+                               notit->cur_exp_packet_content_size,
                                packet_at(notit));
                        status = BT_NOTIF_ITER_STATUS_ERROR;
                        goto end;
                }
+       } else {
+               /*
+                * "Infinite" content: we're done when the medium has
+                * nothing else for us.
+                */
+               status = buf_ensure_available_bits(notit);
+               if (status != BT_NOTIF_ITER_STATUS_OK) {
+                       /*
+                        * If this function returns
+                        * `BT_NOTIF_ITER_STATUS_EOF`:
+                        *
+                        * 1. bt_notif_iter_get_next_notification()
+                        *    emits a "packet end" notification. This
+                        *    resets the current packet. The state
+                        *    remains unchanged otherwise.
+                        * 2. This function is called again. It returns
+                        *    `BT_NOTIF_ITER_STATUS_EOF` again.
+                        * 3. bt_notif_iter_get_next_notification()
+                        *    emits a "stream end" notification because
+                        *    there's no current packet. It sets the
+                        *    current state to `STATE_DONE`.
+                        */
+                       goto end;
+               }
        }
 
        release_event_dscopes(notit);
-       BT_ASSERT(notit->meta.stream_class);
-       event_header_type = bt_stream_class_borrow_event_header_field_type(
-               notit->meta.stream_class);
-       if (!event_header_type) {
-               notit->state = STATE_AFTER_STREAM_EVENT_HEADER;
+       BT_ASSERT(notit->meta.sc);
+       event_header_ft = notit->meta.sc->event_header_ft;
+       if (!event_header_ft) {
+               notit->state = STATE_AFTER_EVENT_HEADER;
                goto end;
        }
 
-       BT_ASSERT(!notit->event_header_field);
-       notit->event_header_field = bt_stream_class_create_event_header_field(
-               notit->meta.stream_class);
-       if (!notit->event_header_field) {
-               BT_LOGE_STR("Cannot create event header field wrapper from trace.");
-               status = BT_NOTIF_ITER_STATUS_ERROR;
-               goto end;
+       if (event_header_ft->in_ir) {
+               BT_ASSERT(!notit->event_header_field);
+               notit->event_header_field = bt_event_header_field_create(
+                       notit->meta.sc->ir_sc);
+               if (!notit->event_header_field) {
+                       BT_LOGE_STR("Cannot create event header field wrapper from trace.");
+                       status = BT_NOTIF_ITER_STATUS_ERROR;
+                       goto end;
+               }
+
+               notit->dscopes.event_header =
+                       bt_event_header_field_borrow_field(notit->event_header_field);
+               BT_ASSERT(notit->dscopes.event_header);
        }
 
-       notit->dscopes.stream_event_header =
-               bt_event_header_field_borrow_field(notit->event_header_field);
-       BT_ASSERT(notit->dscopes.stream_event_header);
        BT_LOGV("Decoding event header field: "
                "notit-addr=%p, stream-class-addr=%p, "
-               "stream-class-name=\"%s\", stream-class-id=%" PRId64 ", "
+               "stream-class-id=%" PRId64 ", "
                "ft-addr=%p",
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class),
-               event_header_type);
-       status = read_dscope_begin_state(notit, event_header_type,
-               STATE_AFTER_STREAM_EVENT_HEADER,
-               STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE,
-               notit->dscopes.stream_event_header);
+               notit, notit->meta.sc,
+               notit->meta.sc->id,
+               event_header_ft);
+       status = read_dscope_begin_state(notit, event_header_ft,
+               STATE_AFTER_EVENT_HEADER,
+               STATE_DSCOPE_EVENT_HEADER_CONTINUE,
+               notit->dscopes.event_header);
        if (status < 0) {
                BT_LOGW("Cannot decode event header field: "
                        "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", "
                        "stream-class-id=%" PRId64 ", ft-addr=%p",
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class),
-                       event_header_type);
+                       notit, notit->meta.sc,
+                       notit->meta.sc->id,
+                       event_header_ft);
        }
 
 end:
@@ -1478,142 +1133,55 @@ enum bt_notif_iter_status read_event_header_continue_state(
                struct bt_notif_iter *notit)
 {
        return read_dscope_continue_state(notit,
-               STATE_AFTER_STREAM_EVENT_HEADER);
+               STATE_AFTER_EVENT_HEADER);
 }
 
 static inline
 enum bt_notif_iter_status set_current_event_class(struct bt_notif_iter *notit)
 {
-       /*
-        * The assert() calls in this function are okay because it is
-        * assumed here that all the metadata objects have been
-        * validated for CTF correctness before decoding actual streams.
-        */
-
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *event_header_type;
-       struct bt_field_type *id_field_type = NULL;
-       struct bt_field_type *v_field_type = NULL;
-       uint64_t event_id = -1ULL;
-       int ret;
 
-       event_header_type = bt_stream_class_borrow_event_header_field_type(
-               notit->meta.stream_class);
-       if (!event_header_type) {
-               /*
-                * No event header, therefore no event class ID field,
-                * therefore only one event class.
-                */
-               goto single_event_class;
-       }
+       struct ctf_event_class *new_event_class = NULL;
 
-       /* Is there any "id"/"v" field in the event header? */
-       BT_ASSERT(bt_field_type_is_structure(event_header_type));
-       id_field_type = bt_field_type_structure_borrow_field_type_by_name(
-               event_header_type, "id");
-       v_field_type = bt_field_type_structure_borrow_field_type_by_name(
-               event_header_type, "v");
-       BT_ASSERT(notit->dscopes.stream_event_header);
-       if (v_field_type) {
+       if (notit->cur_event_class_id == -1) {
                /*
-                *  _   _____ _____
-                * | | |_   _|_   _| __   __ _
-                * | |   | |   | || '_ \ / _` |
-                * | |___| |   | || | | | (_| |  S P E C I A L
-                * |_____|_|   |_||_| |_|\__, |  C A S E â„¢
-                *                       |___/
+                * No current event class ID field, therefore only one
+                * event class.
                 */
-               struct bt_field *v_field = NULL;
-               struct bt_field *v_struct_field = NULL;
-               struct bt_field *v_struct_id_field = NULL;
-
-               // TODO: optimalize!
-               v_field = bt_field_structure_borrow_field_by_name(
-                       notit->dscopes.stream_event_header, "v");
-               BT_ASSERT(v_field);
-
-               v_struct_field =
-                       bt_field_variant_borrow_current_field(v_field);
-               if (!v_struct_field) {
-                       goto end_v_field_type;
-               }
-
-               // TODO: optimalize!
-               v_struct_id_field = bt_field_structure_borrow_field_by_name(
-                       v_struct_field, "id");
-               if (!v_struct_id_field) {
-                       goto end_v_field_type;
-               }
-
-               if (bt_field_is_integer(v_struct_id_field)) {
-                       ret = bt_field_integer_unsigned_get_value(
-                               v_struct_id_field, &event_id);
-                       if (ret) {
-                               BT_LOGV("Cannot get value of unsigned integer field (`id`): continuing: "
-                                       "notit=%p, field-addr=%p",
-                                       notit, v_struct_id_field);
-                               event_id = -1ULL;
-                       }
-               }
-       }
-
-end_v_field_type:
-       if (id_field_type && event_id == -1ULL) {
-               /* Check "id" field */
-               struct bt_field *id_field = NULL;
-               int ret_get_value = 0;
-
-               // TODO: optimalize!
-               id_field = bt_field_structure_borrow_field_by_name(
-                       notit->dscopes.stream_event_header, "id");
-               if (!id_field) {
-                       goto check_event_id;
+               if (notit->meta.sc->event_classes->len != 1) {
+                       BT_LOGW("Need exactly one event class since there's "
+                               "no event class ID field: "
+                               "notit-addr=%p, trace-name=\"%s\"",
+                               notit, notit->meta.tc->name->str);
+                       status = BT_NOTIF_ITER_STATUS_ERROR;
+                       goto end;
                }
 
-               ret_get_value = bt_field_integer_unsigned_get_value(
-                       id_field, &event_id);
-               BT_ASSERT(ret_get_value == 0);
-       }
-
-check_event_id:
-       if (event_id == -1ULL) {
-single_event_class:
-               /* Event ID not found: single event? */
-               BT_ASSERT(bt_stream_class_get_event_class_count(
-                       notit->meta.stream_class) == 1);
-               event_id = 0;
+               new_event_class = notit->meta.sc->event_classes->pdata[0];
+               notit->cur_event_class_id = new_event_class->id;
+               goto end;
        }
 
-       BT_LOGV("Found event class ID to use: notit-addr=%p, "
-               "stream-class-addr=%p, stream-class-name=\"%s\", "
-               "stream-class-id=%" PRId64 ", "
-               "event-class-id=%" PRIu64,
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class),
-               event_id);
-       notit->meta.event_class = bt_stream_class_borrow_event_class_by_id(
-               notit->meta.stream_class, event_id);
-       if (!notit->meta.event_class) {
+       new_event_class = ctf_stream_class_borrow_event_class_by_id(
+               notit->meta.sc, notit->cur_event_class_id);
+       if (!new_event_class) {
                BT_LOGW("No event class with ID of event class ID to use in stream class: "
-                       "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", "
-                       "stream-class-id=%" PRId64 ", "
-                       "event-class-id=%" PRIu64,
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class),
-                       event_id);
+                       "notit-addr=%p, stream-class-id=%" PRIu64 ", "
+                       "event-class-id=%" PRIu64 ", "
+                       "trace-addr=%p, trace-name=\"%s\"",
+                       notit, notit->meta.sc->id, notit->cur_event_class_id,
+                       notit->meta.tc, notit->meta.tc->name->str);
                status = BT_NOTIF_ITER_STATUS_ERROR;
                goto end;
        }
 
+       notit->meta.ec = new_event_class;
        BT_LOGV("Set current event class: "
                "notit-addr=%p, event-class-addr=%p, "
-               "event-class-name=\"%s\", event-class-id=%" PRId64,
-               notit, notit->meta.event_class,
-               bt_event_class_get_name(notit->meta.event_class),
-               bt_event_class_get_id(notit->meta.event_class));
+               "event-class-id=%" PRId64 ", "
+               "event-class-name=\"%s\"",
+               notit, notit->meta.ec, notit->meta.ec->id,
+               notit->meta.ec->name->str);
 
 end:
        return status;
@@ -1626,22 +1194,22 @@ enum bt_notif_iter_status set_current_event_notification(
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
        struct bt_notification *notif = NULL;
 
-       BT_ASSERT(notit->meta.event_class);
+       BT_ASSERT(notit->meta.ec);
        BT_ASSERT(notit->packet);
        BT_LOGV("Creating event notification from event class and packet: "
                "notit-addr=%p, ec-addr=%p, ec-name=\"%s\", packet-addr=%p",
-               notit, notit->meta.event_class,
-               bt_event_class_get_name(notit->meta.event_class),
+               notit, notit->meta.ec,
+               notit->meta.ec->name->str,
                notit->packet);
        BT_ASSERT(notit->notif_iter);
        notif = bt_notification_event_create(notit->notif_iter,
-               notit->meta.event_class, notit->packet);
+               notit->meta.ec->ir_ec, notit->packet);
        if (!notif) {
                BT_LOGE("Cannot create event notification: "
                        "notit-addr=%p, ec-addr=%p, ec-name=\"%s\", "
                        "packet-addr=%p",
-                       notit, notit->meta.event_class,
-                       bt_event_class_get_name(notit->meta.event_class),
+                       notit, notit->meta.ec,
+                       notit->meta.ec->name->str,
                        notit->packet);
                goto error;
        }
@@ -1682,7 +1250,6 @@ enum bt_notif_iter_status after_event_header_state(
                BT_ASSERT(notit->event);
                ret = bt_event_move_header(notit->event,
                        notit->event_header_field);
-
                if (ret) {
                        status = BT_NOTIF_ITER_STATUS_ERROR;
                        goto end;
@@ -1691,60 +1258,58 @@ enum bt_notif_iter_status after_event_header_state(
                notit->event_header_field = NULL;
 
                /*
-                * At this point notit->dscopes.stream_event_header has
+                * At this point notit->dscopes.event_header has
                 * the same value as the event header field within
                 * notit->event.
                 */
-               BT_ASSERT(bt_event_borrow_header(notit->event) ==
-                       notit->dscopes.stream_event_header);
+               BT_ASSERT(bt_event_borrow_header_field(notit->event) ==
+                       notit->dscopes.event_header);
        }
 
-       notit->state = STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN;
+       notit->state = STATE_DSCOPE_EVENT_COMMON_CONTEXT_BEGIN;
 
 end:
        return status;
 }
 
 static
-enum bt_notif_iter_status read_stream_event_context_begin_state(
+enum bt_notif_iter_status read_event_common_context_begin_state(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *stream_event_context_type;
+       struct ctf_field_type *event_common_context_ft;
 
-       stream_event_context_type =
-               bt_stream_class_borrow_event_context_field_type(
-                       notit->meta.stream_class);
-       if (!stream_event_context_type) {
-               notit->state = STATE_DSCOPE_EVENT_CONTEXT_BEGIN;
+       event_common_context_ft = notit->meta.sc->event_common_context_ft;
+       if (!event_common_context_ft) {
+               notit->state = STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN;
                goto end;
        }
 
-       BT_ASSERT(!notit->dscopes.stream_event_context);
-       notit->dscopes.stream_event_context =
-               bt_event_borrow_stream_event_context(notit->event);
-       BT_ASSERT(notit->dscopes.stream_event_context);
-       BT_LOGV("Decoding stream event context field: "
+       if (event_common_context_ft->in_ir) {
+               BT_ASSERT(!notit->dscopes.event_common_context);
+               notit->dscopes.event_common_context =
+                       bt_event_borrow_common_context_field(notit->event);
+               BT_ASSERT(notit->dscopes.event_common_context);
+       }
+
+       BT_LOGV("Decoding event common context field: "
                "notit-addr=%p, stream-class-addr=%p, "
-               "stream-class-name=\"%s\", stream-class-id=%" PRId64 ", "
+               "stream-class-id=%" PRId64 ", "
                "ft-addr=%p",
-               notit, notit->meta.stream_class,
-               bt_stream_class_get_name(notit->meta.stream_class),
-               bt_stream_class_get_id(notit->meta.stream_class),
-               stream_event_context_type);
-       status = read_dscope_begin_state(notit, stream_event_context_type,
-               STATE_DSCOPE_EVENT_CONTEXT_BEGIN,
-               STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE,
-               notit->dscopes.stream_event_context);
+               notit, notit->meta.sc,
+               notit->meta.sc->id,
+               event_common_context_ft);
+       status = read_dscope_begin_state(notit, event_common_context_ft,
+               STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN,
+               STATE_DSCOPE_EVENT_COMMON_CONTEXT_CONTINUE,
+               notit->dscopes.event_common_context);
        if (status < 0) {
-               BT_LOGW("Cannot decode stream event context field: "
+               BT_LOGW("Cannot decode event common context field: "
                        "notit-addr=%p, stream-class-addr=%p, "
-                       "stream-class-name=\"%s\", "
                        "stream-class-id=%" PRId64 ", ft-addr=%p",
-                       notit, notit->meta.stream_class,
-                       bt_stream_class_get_name(notit->meta.stream_class),
-                       bt_stream_class_get_id(notit->meta.stream_class),
-                       stream_event_context_type);
+                       notit, notit->meta.sc,
+                       notit->meta.sc->id,
+                       event_common_context_ft);
        }
 
 end:
@@ -1752,51 +1317,54 @@ end:
 }
 
 static
-enum bt_notif_iter_status read_stream_event_context_continue_state(
+enum bt_notif_iter_status read_event_common_context_continue_state(
                struct bt_notif_iter *notit)
 {
        return read_dscope_continue_state(notit,
-               STATE_DSCOPE_EVENT_CONTEXT_BEGIN);
+               STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN);
 }
 
 static
-enum bt_notif_iter_status read_event_context_begin_state(
+enum bt_notif_iter_status read_event_spec_context_begin_state(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *event_context_type;
+       struct ctf_field_type *event_spec_context_ft;
 
-       event_context_type = bt_event_class_borrow_context_field_type(
-               notit->meta.event_class);
-       if (!event_context_type) {
+       event_spec_context_ft = notit->meta.ec->spec_context_ft;
+       if (!event_spec_context_ft) {
                notit->state = STATE_DSCOPE_EVENT_PAYLOAD_BEGIN;
                goto end;
        }
 
-       BT_ASSERT(!notit->dscopes.event_context);
-       notit->dscopes.event_context = bt_event_borrow_context(notit->event);
-       BT_ASSERT(notit->dscopes.event_context);
-       BT_LOGV("Decoding event context field: "
+       if (event_spec_context_ft->in_ir) {
+               BT_ASSERT(!notit->dscopes.event_spec_context);
+               notit->dscopes.event_spec_context = bt_event_borrow_specific_context_field(
+                       notit->event);
+               BT_ASSERT(notit->dscopes.event_spec_context);
+       }
+
+       BT_LOGV("Decoding event specific context field: "
                "notit-addr=%p, event-class-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "ft-addr=%p",
-               notit, notit->meta.event_class,
-               bt_event_class_get_name(notit->meta.event_class),
-               bt_event_class_get_id(notit->meta.event_class),
-               event_context_type);
-       status = read_dscope_begin_state(notit, event_context_type,
+               notit, notit->meta.ec,
+               notit->meta.ec->name->str,
+               notit->meta.ec->id,
+               event_spec_context_ft);
+       status = read_dscope_begin_state(notit, event_spec_context_ft,
                STATE_DSCOPE_EVENT_PAYLOAD_BEGIN,
-               STATE_DSCOPE_EVENT_CONTEXT_CONTINUE,
-               notit->dscopes.event_context);
+               STATE_DSCOPE_EVENT_SPEC_CONTEXT_CONTINUE,
+               notit->dscopes.event_spec_context);
        if (status < 0) {
-               BT_LOGW("Cannot decode event context field: "
+               BT_LOGW("Cannot decode event specific context field: "
                        "notit-addr=%p, event-class-addr=%p, "
                        "event-class-name=\"%s\", "
                        "event-class-id=%" PRId64 ", ft-addr=%p",
-                       notit, notit->meta.event_class,
-                       bt_event_class_get_name(notit->meta.event_class),
-                       bt_event_class_get_id(notit->meta.event_class),
-                       event_context_type);
+                       notit, notit->meta.ec,
+                       notit->meta.ec->name->str,
+                       notit->meta.ec->id,
+                       event_spec_context_ft);
        }
 
 end:
@@ -1804,7 +1372,7 @@ end:
 }
 
 static
-enum bt_notif_iter_status read_event_context_continue_state(
+enum bt_notif_iter_status read_event_spec_context_continue_state(
                struct bt_notif_iter *notit)
 {
        return read_dscope_continue_state(notit,
@@ -1816,27 +1384,30 @@ enum bt_notif_iter_status read_event_payload_begin_state(
                struct bt_notif_iter *notit)
 {
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
-       struct bt_field_type *event_payload_type;
+       struct ctf_field_type *event_payload_ft;
 
-       event_payload_type = bt_event_class_borrow_payload_field_type(
-               notit->meta.event_class);
-       if (!event_payload_type) {
+       event_payload_ft = notit->meta.ec->payload_ft;
+       if (!event_payload_ft) {
                notit->state = STATE_EMIT_NOTIF_EVENT;
                goto end;
        }
 
-       BT_ASSERT(!notit->dscopes.event_payload);
-       notit->dscopes.event_payload = bt_event_borrow_payload(notit->event);
-       BT_ASSERT(notit->dscopes.event_payload);
+       if (event_payload_ft->in_ir) {
+               BT_ASSERT(!notit->dscopes.event_payload);
+               notit->dscopes.event_payload = bt_event_borrow_payload_field(
+                       notit->event);
+               BT_ASSERT(notit->dscopes.event_payload);
+       }
+
        BT_LOGV("Decoding event payload field: "
                "notit-addr=%p, event-class-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "ft-addr=%p",
-               notit, notit->meta.event_class,
-               bt_event_class_get_name(notit->meta.event_class),
-               bt_event_class_get_id(notit->meta.event_class),
-               event_payload_type);
-       status = read_dscope_begin_state(notit, event_payload_type,
+               notit, notit->meta.ec,
+               notit->meta.ec->name->str,
+               notit->meta.ec->id,
+               event_payload_ft);
+       status = read_dscope_begin_state(notit, event_payload_ft,
                STATE_EMIT_NOTIF_EVENT,
                STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE,
                notit->dscopes.event_payload);
@@ -1845,10 +1416,10 @@ enum bt_notif_iter_status read_event_payload_begin_state(
                        "notit-addr=%p, event-class-addr=%p, "
                        "event-class-name=\"%s\", "
                        "event-class-id=%" PRId64 ", ft-addr=%p",
-                       notit, notit->meta.event_class,
-                       bt_event_class_get_name(notit->meta.event_class),
-                       bt_event_class_get_id(notit->meta.event_class),
-                       event_payload_type);
+                       notit, notit->meta.ec,
+                       notit->meta.ec->name->str,
+                       notit->meta.ec->id,
+                       event_payload_ft);
        }
 
 end:
@@ -1869,8 +1440,8 @@ enum bt_notif_iter_status skip_packet_padding_state(
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
        size_t bits_to_skip;
 
-       BT_ASSERT(notit->cur_packet_size > 0);
-       bits_to_skip = notit->cur_packet_size - packet_at(notit);
+       BT_ASSERT(notit->cur_exp_packet_total_size > 0);
+       bits_to_skip = notit->cur_exp_packet_total_size - packet_at(notit);
        if (bits_to_skip == 0) {
                notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN;
                goto end;
@@ -1888,7 +1459,8 @@ enum bt_notif_iter_status skip_packet_padding_state(
                BT_LOGV("Skipping %zu bits of padding: notit-addr=%p, size=%zu",
                        bits_to_consume, notit, bits_to_consume);
                buf_consume_bits(notit, bits_to_consume);
-               bits_to_skip = notit->cur_packet_size - packet_at(notit);
+               bits_to_skip = notit->cur_exp_packet_total_size -
+                       packet_at(notit);
                if (bits_to_skip == 0) {
                        notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN;
                        goto end;
@@ -1935,28 +1507,28 @@ enum bt_notif_iter_status handle_state(struct bt_notif_iter *notit)
                notit->state = STATE_EMIT_NOTIF_NEW_PACKET;
                break;
        case STATE_EMIT_NOTIF_NEW_PACKET:
-               notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN;
+               notit->state = STATE_DSCOPE_EVENT_HEADER_BEGIN;
                break;
-       case STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN:
+       case STATE_DSCOPE_EVENT_HEADER_BEGIN:
                status = read_event_header_begin_state(notit);
                break;
-       case STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE:
+       case STATE_DSCOPE_EVENT_HEADER_CONTINUE:
                status = read_event_header_continue_state(notit);
                break;
-       case STATE_AFTER_STREAM_EVENT_HEADER:
+       case STATE_AFTER_EVENT_HEADER:
                status = after_event_header_state(notit);
                break;
-       case STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN:
-               status = read_stream_event_context_begin_state(notit);
+       case STATE_DSCOPE_EVENT_COMMON_CONTEXT_BEGIN:
+               status = read_event_common_context_begin_state(notit);
                break;
-       case STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE:
-               status = read_stream_event_context_continue_state(notit);
+       case STATE_DSCOPE_EVENT_COMMON_CONTEXT_CONTINUE:
+               status = read_event_common_context_continue_state(notit);
                break;
-       case STATE_DSCOPE_EVENT_CONTEXT_BEGIN:
-               status = read_event_context_begin_state(notit);
+       case STATE_DSCOPE_EVENT_SPEC_CONTEXT_BEGIN:
+               status = read_event_spec_context_begin_state(notit);
                break;
-       case STATE_DSCOPE_EVENT_CONTEXT_CONTINUE:
-               status = read_event_context_continue_state(notit);
+       case STATE_DSCOPE_EVENT_SPEC_CONTEXT_CONTINUE:
+               status = read_event_spec_context_continue_state(notit);
                break;
        case STATE_DSCOPE_EVENT_PAYLOAD_BEGIN:
                status = read_event_payload_begin_state(notit);
@@ -1965,7 +1537,7 @@ enum bt_notif_iter_status handle_state(struct bt_notif_iter *notit)
                status = read_event_payload_continue_state(notit);
                break;
        case STATE_EMIT_NOTIF_EVENT:
-               notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN;
+               notit->state = STATE_DSCOPE_EVENT_HEADER_BEGIN;
                break;
        case STATE_SKIP_PACKET_PADDING:
                status = skip_packet_padding_state(notit);
@@ -1995,11 +1567,9 @@ void bt_notif_iter_reset(struct bt_notif_iter *notit)
        BT_ASSERT(notit);
        BT_LOGD("Resetting notification iterator: addr=%p", notit);
        stack_clear(notit->stack);
-       notit->meta.stream_class = NULL;
-       notit->meta.event_class = NULL;
+       notit->meta.sc = NULL;
+       notit->meta.ec = NULL;
        BT_PUT(notit->packet);
-       notit->prev_packet_avail = BT_PACKET_PREVIOUS_PACKET_AVAILABILITY_NONE;
-       BT_PUT(notit->prev_packet);
        BT_PUT(notit->stream);
        BT_PUT(notit->event_notif);
        release_all_dscopes(notit);
@@ -2026,11 +1596,13 @@ void bt_notif_iter_reset(struct bt_notif_iter *notit)
        notit->buf.last_eh_at = SIZE_MAX;
        notit->buf.packet_offset = 0;
        notit->state = STATE_INIT;
-       notit->cur_content_size = -1;
-       notit->cur_packet_size = -1;
+       notit->cur_exp_packet_content_size = -1;
+       notit->cur_exp_packet_total_size = -1;
        notit->cur_packet_offset = -1;
+       notit->cur_stream_class_id = -1;
+       notit->cur_event_class_id = -1;
+       notit->cur_data_stream_id = -1;
        notit->stream_begin_emitted = false;
-       notit->cur_timestamp_end = NULL;
 }
 
 static
@@ -2045,18 +1617,17 @@ int bt_notif_iter_switch_packet(struct bt_notif_iter *notit)
         */
        BT_ASSERT(notit);
 
-       if (notit->cur_packet_size != -1) {
-               notit->cur_packet_offset += notit->cur_packet_size;
+       if (notit->cur_exp_packet_total_size != -1) {
+               notit->cur_packet_offset += notit->cur_exp_packet_total_size;
        }
 
        BT_LOGV("Switching packet: notit-addr=%p, cur=%zu, "
                "packet-offset=%" PRId64, notit, notit->buf.at,
                notit->cur_packet_offset);
        stack_clear(notit->stack);
-       notit->meta.event_class = NULL;
+       notit->meta.ec = NULL;
        BT_PUT(notit->packet);
        BT_PUT(notit->event_notif);
-       notit->cur_timestamp_end = NULL;
        release_all_dscopes(notit);
        notit->cur_dscope_field = NULL;
 
@@ -2083,9 +1654,15 @@ int bt_notif_iter_switch_packet(struct bt_notif_iter *notit)
                        notit->buf.addr, notit->buf.sz);
        }
 
-       notit->cur_content_size = -1;
-       notit->cur_packet_size = -1;
-       notit->cur_sc_field_path_cache = NULL;
+       notit->cur_exp_packet_content_size = -1;
+       notit->cur_exp_packet_total_size = -1;
+       notit->cur_stream_class_id = -1;
+       notit->cur_event_class_id = -1;
+       notit->cur_data_stream_id = -1;
+       notit->snapshots.discarded_events = UINT64_C(-1);
+       notit->snapshots.packets = UINT64_C(-1);
+       notit->snapshots.beginning_clock = UINT64_C(-1);
+       notit->snapshots.end_clock = UINT64_C(-1);
 
 end:
        return ret;
@@ -2096,234 +1673,217 @@ struct bt_field *borrow_next_field(struct bt_notif_iter *notit)
 {
        struct bt_field *next_field = NULL;
        struct bt_field *base_field;
-       struct bt_field_type *base_type;
+       struct bt_field_type *base_ft;
        size_t index;
 
        BT_ASSERT(!stack_empty(notit->stack));
        index = stack_top(notit->stack)->index;
        base_field = stack_top(notit->stack)->base;
        BT_ASSERT(base_field);
-       base_type = bt_field_borrow_type(base_field);
-       BT_ASSERT(base_type);
+       base_ft = bt_field_borrow_type(base_field);
+       BT_ASSERT(base_ft);
 
-       switch (bt_field_type_get_type_id(base_type)) {
-       case BT_FIELD_TYPE_ID_STRUCT:
+       switch (bt_field_type_get_type_id(base_ft)) {
+       case BT_FIELD_TYPE_ID_STRUCTURE:
        {
-               next_field = bt_field_structure_borrow_field_by_index(
+               BT_ASSERT(index <
+                       bt_field_type_structure_get_member_count(
+                               bt_field_borrow_type(base_field)));
+               next_field = bt_field_structure_borrow_member_field_by_index(
                        base_field, index);
                break;
        }
-       case BT_FIELD_TYPE_ID_ARRAY:
-               next_field = bt_field_array_borrow_field(base_field, index);
-               break;
-       case BT_FIELD_TYPE_ID_SEQUENCE:
-               next_field = bt_field_sequence_borrow_field(base_field, index);
+       case BT_FIELD_TYPE_ID_STATIC_ARRAY:
+       case BT_FIELD_TYPE_ID_DYNAMIC_ARRAY:
+               BT_ASSERT(index < bt_field_array_get_length(base_field));
+               next_field = bt_field_array_borrow_element_field_by_index(
+                       base_field, index);
                break;
        case BT_FIELD_TYPE_ID_VARIANT:
-               next_field = bt_field_variant_borrow_current_field(base_field);
+               BT_ASSERT(index == 0);
+               next_field = bt_field_variant_borrow_selected_option_field(
+                       base_field);
                break;
        default:
-               BT_LOGF("Unknown base field type ID: "
-                       "notit-addr=%p, ft-addr=%p, ft-id=%s",
-                       notit, base_type,
-                       bt_common_field_type_id_string(
-                               bt_field_type_get_type_id(base_type)));
                abort();
        }
 
+       BT_ASSERT(next_field);
        return next_field;
 }
 
 static
-void update_clock_state(uint64_t *state, struct bt_field *value_field,
-               struct bt_field_type *value_type)
+void update_default_clock(struct bt_notif_iter *notit, uint64_t new_val,
+               uint64_t new_val_size)
 {
-       uint64_t requested_new_value;
-       uint64_t requested_new_value_mask;
+       uint64_t new_val_mask;
        uint64_t cur_value_masked;
-       int requested_new_value_size;
-       int ret;
 
-       BT_ASSERT(value_type);
-       BT_ASSERT(bt_field_type_is_integer(value_type));
-       requested_new_value_size =
-                       bt_field_type_integer_get_size(value_type);
-       BT_ASSERT(requested_new_value_size > 0);
-       ret = bt_field_integer_unsigned_get_value(value_field,
-                       &requested_new_value);
-       BT_ASSERT(!ret);
+       BT_ASSERT(new_val_size > 0);
 
        /*
         * Special case for a 64-bit new value, which is the limit
         * of a clock value as of this version: overwrite the
         * current value directly.
         */
-       if (requested_new_value_size == 64) {
-               *state = requested_new_value;
+       if (new_val_size == 64) {
+               notit->default_clock_val = new_val;
                goto end;
        }
 
-       requested_new_value_mask = (1ULL << requested_new_value_size) - 1;
-       cur_value_masked = *state & requested_new_value_mask;
+       new_val_mask = (1ULL << new_val_size) - 1;
+       cur_value_masked = notit->default_clock_val & new_val_mask;
 
-       if (requested_new_value < cur_value_masked) {
+       if (new_val < cur_value_masked) {
                /*
                 * It looks like a wrap happened on the number of bits
                 * of the requested new value. Assume that the clock
                 * value wrapped only one time.
                 */
-               *state += requested_new_value_mask + 1;
+               notit->default_clock_val += new_val_mask + 1;
        }
 
        /* Clear the low bits of the current clock value. */
-       *state &= ~requested_new_value_mask;
+       notit->default_clock_val &= ~new_val_mask;
 
        /* Set the low bits of the current clock value. */
-       *state |= requested_new_value;
+       notit->default_clock_val |= new_val;
 
 end:
-       BT_LOGV("Updated clock's value from integer field's value: "
-               "value=%" PRIu64, *state);
+       BT_LOGV("Updated default clock's value from integer field's value: "
+               "value=%" PRIu64, notit->default_clock_val);
 }
 
 static
-enum bt_btr_status update_clock(struct bt_notif_iter *notit,
-               struct bt_field *int_field)
+enum bt_btr_status btr_unsigned_int_cb(uint64_t value,
+               struct ctf_field_type *ft, void *data)
 {
-       gboolean clock_class_found;
-       uint64_t *clock_state = NULL;
-       struct bt_field_type *int_field_type = NULL;
-       enum bt_btr_status ret = BT_BTR_STATUS_OK;
-       struct bt_clock_class *clock_class = NULL;
+       struct bt_notif_iter *notit = data;
+       enum bt_btr_status status = BT_BTR_STATUS_OK;
+       struct bt_field *field = NULL;
+       struct ctf_field_type_int *int_ft = (void *) ft;
 
-       int_field_type = bt_field_borrow_type(int_field);
-       BT_ASSERT(int_field_type);
-
-       if (bt_field_type_is_enumeration(int_field_type)) {
-               int_field_type =
-                       bt_field_type_enumeration_borrow_container_field_type(
-                               int_field_type);
-       }
+       BT_LOGV("Unsigned integer function called from BTR: "
+               "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
+               "ft-id=%d, ft-in-ir=%d, value=%" PRIu64,
+               notit, notit->btr, ft, ft->id, ft->in_ir, value);
 
-       clock_class = bt_field_type_integer_borrow_mapped_clock_class(
-               int_field_type);
-       if (likely(!clock_class)) {
-               goto end;
+       if (likely(int_ft->meaning == CTF_FIELD_TYPE_MEANING_NONE)) {
+               goto update_def_clock;
        }
 
-       clock_class_found = g_hash_table_lookup_extended(notit->clock_states,
-               clock_class, NULL, (gpointer) &clock_state);
-       if (!clock_class_found) {
-               clock_state = g_new0(uint64_t, 1);
-               if (!clock_state) {
-                       BT_LOGE_STR("Failed to allocate a uint64_t.");
-                       ret = BT_BTR_STATUS_ENOMEM;
+       switch (int_ft->meaning) {
+       case CTF_FIELD_TYPE_MEANING_EVENT_CLASS_ID:
+               notit->cur_event_class_id = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_DATA_STREAM_ID:
+               notit->cur_data_stream_id = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_PACKET_BEGINNING_TIME:
+               notit->snapshots.beginning_clock = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_PACKET_END_TIME:
+               notit->snapshots.end_clock = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_STREAM_CLASS_ID:
+               notit->cur_stream_class_id = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_MAGIC:
+               if (value != 0xc1fc1fc1) {
+                       BT_LOGW("Invalid CTF magic number: notit-addr=%p, "
+                               "magic=%" PRIx64, notit, value);
+                       status = BT_BTR_STATUS_ERROR;
                        goto end;
                }
 
-               g_hash_table_insert(notit->clock_states, clock_class,
-                       clock_state);
+               break;
+       case CTF_FIELD_TYPE_MEANING_PACKET_COUNTER_SNAPSHOT:
+               notit->snapshots.packets = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_DISC_EV_REC_COUNTER_SNAPSHOT:
+               notit->snapshots.discarded_events = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_EXP_PACKET_TOTAL_SIZE:
+               notit->cur_exp_packet_total_size = value;
+               break;
+       case CTF_FIELD_TYPE_MEANING_EXP_PACKET_CONTENT_SIZE:
+               notit->cur_exp_packet_content_size = value;
+               break;
+       default:
+               abort();
        }
 
-       /* Update the clock's state. */
-       BT_LOGV("Updating notification iterator's clock's value from integer field: "
-               "notit-addr=%p, clock-class-addr=%p, "
-               "clock-class-name=\"%s\", value=%" PRIu64,
-               notit, clock_class,
-               bt_clock_class_get_name(clock_class), *clock_state);
-       update_clock_state(clock_state, int_field, int_field_type);
-
-end:
-       return ret;
-}
+update_def_clock:
+       if (unlikely(int_ft->mapped_clock_class)) {
+               update_default_clock(notit, value, int_ft->base.size);
+       }
 
-static
-enum bt_btr_status btr_unsigned_int_common(uint64_t value,
-               struct bt_field_type *type, void *data,
-               struct bt_field **out_field)
-{
-       enum bt_btr_status status = BT_BTR_STATUS_OK;
-       struct bt_field *field = NULL;
-       struct bt_notif_iter *notit = data;
-       int ret;
+       if (unlikely(int_ft->storing_index >= 0)) {
+               g_array_index(notit->stored_values, uint64_t,
+                       (uint64_t) int_ft->storing_index) = value;
+       }
 
-       BT_LOGV("Common unsigned integer function called from BTR: "
-               "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s, value=%" PRIu64,
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)),
-               value);
-       field = borrow_next_field(notit);
-       if (!field) {
-               BT_LOGW("Cannot borrow next field: notit-addr=%p", notit);
-               status = BT_BTR_STATUS_ERROR;
+       if (unlikely(!ft->in_ir)) {
                goto end;
        }
 
-       BT_ASSERT(bt_field_is_integer(field) || bt_field_is_enumeration(field));
-       ret = bt_field_integer_unsigned_set_value(field, value);
-       BT_ASSERT(ret == 0);
+       field = borrow_next_field(notit);
+       BT_ASSERT(field);
+       BT_ASSERT(bt_field_borrow_type(field) == ft->ir_ft);
+       BT_ASSERT(bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_UNSIGNED_INTEGER ||
+               bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_UNSIGNED_ENUMERATION);
+       bt_field_unsigned_integer_set_value(field, value);
        stack_top(notit->stack)->index++;
-       *out_field = field;
 
 end:
        return status;
 }
 
 static
-enum bt_btr_status btr_timestamp_end_cb(void *value,
-               struct bt_field_type *type, void *data)
+enum bt_btr_status btr_unsigned_int_char_cb(uint64_t value,
+               struct ctf_field_type *ft, void *data)
 {
-       enum bt_btr_status status;
-       struct bt_field *field = NULL;
+       int ret;
        struct bt_notif_iter *notit = data;
-       uint64_t uvalue = *((uint64_t *) value);
+       enum bt_btr_status status = BT_BTR_STATUS_OK;
+       struct bt_field *string_field = NULL;
+       struct ctf_field_type_int *int_ft = (void *) ft;
+       char str[2] = {'\0', '\0'};
 
-       BT_LOGV("`timestamp_end` unsigned integer function called from BTR: "
+       BT_LOGV("Unsigned integer character function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)));
-
-       status = btr_unsigned_int_common(uvalue, type, data, &field);
+               "ft-id=%d, ft-in-ir=%d, value=%" PRIu64,
+               notit, notit->btr, ft, ft->id, ft->in_ir, value);
+       BT_ASSERT(int_ft->meaning == CTF_FIELD_TYPE_MEANING_NONE);
+       BT_ASSERT(!int_ft->mapped_clock_class);
+       BT_ASSERT(int_ft->storing_index < 0);
 
-       /* Set as the current packet's end timestamp field */
-       notit->cur_timestamp_end = field;
-       return status;
-}
-
-static
-enum bt_btr_status btr_unsigned_int_cb(uint64_t value,
-               struct bt_field_type *type, void *data)
-{
-       struct bt_notif_iter *notit = data;
-       enum bt_btr_status status = BT_BTR_STATUS_OK;
-       struct bt_field *field = NULL;
-       struct field_cb_override *override;
+       if (unlikely(!ft->in_ir)) {
+               goto end;
+       }
 
-       BT_LOGV("Unsigned integer function called from BTR: "
-               "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s, value=%" PRIu64,
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)),
-               value);
-       override = g_hash_table_lookup(notit->field_overrides, type);
-       if (unlikely(override)) {
-               /* Override function logs errors */
-               status = override->func(&value, type, override->data);
+       if (notit->done_filling_string) {
                goto end;
        }
 
-       status = btr_unsigned_int_common(value, type, data, &field);
-       if (status != BT_BTR_STATUS_OK) {
-               /* btr_unsigned_int_common() logs errors */
+       if (value == 0) {
+               notit->done_filling_string = true;
                goto end;
        }
 
-       status = update_clock(notit, field);
+       string_field = stack_top(notit->stack)->base;
+       BT_ASSERT(bt_field_get_type_id(string_field) == BT_FIELD_TYPE_ID_STRING);
+
+       /* Append character */
+       str[0] = (char) value;
+       ret = bt_field_string_append_with_length(string_field, str, 1);
+       if (ret) {
+               BT_LOGE("Cannot append character to string field's value: "
+                       "notit-addr=%p, field-addr=%p, ret=%d",
+                       notit, string_field, ret);
+               status = BT_BTR_STATUS_ERROR;
+               goto end;
+       }
 
 end:
        return status;
@@ -2331,30 +1891,34 @@ end:
 
 static
 enum bt_btr_status btr_signed_int_cb(int64_t value,
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
        enum bt_btr_status status = BT_BTR_STATUS_OK;
        struct bt_field *field = NULL;
        struct bt_notif_iter *notit = data;
-       int ret;
+       struct ctf_field_type_int *int_ft = (void *) ft;
 
        BT_LOGV("Signed integer function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s, value=%" PRId64,
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)),
-               value);
-       field = borrow_next_field(notit);
-       if (!field) {
-               BT_LOGW("Cannot borrow next field: notit-addr=%p", notit);
-               status = BT_BTR_STATUS_ERROR;
+               "ft-id=%d, ft-in-ir=%d, value=%" PRId64,
+               notit, notit->btr, ft, ft->id, ft->in_ir, value);
+       BT_ASSERT(int_ft->meaning == CTF_FIELD_TYPE_MEANING_NONE);
+
+       if (unlikely(int_ft->storing_index >= 0)) {
+               g_array_index(notit->stored_values, uint64_t,
+                       (uint64_t) int_ft->storing_index) = (uint64_t) value;
+       }
+
+       if (unlikely(!ft->in_ir)) {
                goto end;
        }
 
-       BT_ASSERT(bt_field_is_integer(field) || bt_field_is_enumeration(field));
-       ret = bt_field_integer_signed_set_value(field, value);
-       BT_ASSERT(ret == 0);
+       field = borrow_next_field(notit);
+       BT_ASSERT(field);
+       BT_ASSERT(bt_field_borrow_type(field) == ft->ir_ft);
+       BT_ASSERT(bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_SIGNED_INTEGER ||
+               bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_SIGNED_ENUMERATION);
+       bt_field_signed_integer_set_value(field, value);
        stack_top(notit->stack)->index++;
 
 end:
@@ -2363,80 +1927,59 @@ end:
 
 static
 enum bt_btr_status btr_floating_point_cb(double value,
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
        enum bt_btr_status status = BT_BTR_STATUS_OK;
        struct bt_field *field = NULL;
        struct bt_notif_iter *notit = data;
-       int ret;
 
        BT_LOGV("Floating point number function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s, value=%f",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)),
-               value);
+               "ft-id=%d, ft-in-ir=%d, value=%f",
+               notit, notit->btr, ft, ft->id, ft->in_ir, value);
+       BT_ASSERT(ft->in_ir);
        field = borrow_next_field(notit);
-       if (!field) {
-               BT_LOGW("Cannot borrow next field: notit-addr=%p", notit);
-               status = BT_BTR_STATUS_ERROR;
-               goto end;
-       }
-
-       ret = bt_field_floating_point_set_value(field, value);
-       BT_ASSERT(!ret);
+       BT_ASSERT(field);
+       BT_ASSERT(bt_field_borrow_type(field) == ft->ir_ft);
+       BT_ASSERT(bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_REAL);
+       bt_field_real_set_value(field, value);
        stack_top(notit->stack)->index++;
-
-end:
        return status;
 }
 
 static
 enum bt_btr_status btr_string_begin_cb(
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
-       enum bt_btr_status status = BT_BTR_STATUS_OK;
        struct bt_field *field = NULL;
        struct bt_notif_iter *notit = data;
        int ret;
 
        BT_LOGV("String (beginning) function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)));
-       field = borrow_next_field(notit);
-       if (!field) {
-               BT_LOGW("Cannot get next field: notit-addr=%p", notit);
-               status = BT_BTR_STATUS_ERROR;
-               goto end;
-       }
+               "ft-id=%d, ft-in-ir=%d",
+               notit, notit->btr, ft, ft->id, ft->in_ir);
 
+       BT_ASSERT(ft->in_ir);
+       field = borrow_next_field(notit);
+       BT_ASSERT(field);
+       BT_ASSERT(bt_field_borrow_type(field) == ft->ir_ft);
+       BT_ASSERT(bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_STRING);
        ret = bt_field_string_clear(field);
        BT_ASSERT(ret == 0);
 
        /*
-        * Push on stack. Not a compound type per se, but we know that only
-        * btr_string_cb() may be called between this call and a subsequent
-        * call to btr_string_end_cb().
+        * Push on stack. Not a compound type per se, but we know that
+        * only btr_string_cb() may be called between this call and a
+        * subsequent call to btr_string_end_cb().
         */
-       ret = stack_push(notit->stack, field);
-       if (ret) {
-               BT_LOGE("Cannot push string field on stack: "
-                       "notit-addr=%p, field-addr=%p", notit, field);
-               status = BT_BTR_STATUS_ERROR;
-               goto end;
-       }
-
-end:
-       return status;
+       stack_push(notit->stack, field);
+       return BT_BTR_STATUS_OK;
 }
 
 static
 enum bt_btr_status btr_string_cb(const char *value,
-               size_t len, struct bt_field_type *type, void *data)
+               size_t len, struct ctf_field_type *ft, void *data)
 {
        enum bt_btr_status status = BT_BTR_STATUS_OK;
        struct bt_field *field = NULL;
@@ -2445,16 +1988,15 @@ enum bt_btr_status btr_string_cb(const char *value,
 
        BT_LOGV("String (substring) function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s, string-length=%zu",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)),
+               "ft-id=%d, ft-in-ir=%d, string-length=%zu",
+               notit, notit->btr, ft, ft->id, ft->in_ir,
                len);
+       BT_ASSERT(ft->in_ir);
        field = stack_top(notit->stack)->base;
        BT_ASSERT(field);
 
        /* Append current substring */
-       ret = bt_field_string_append_len(field, value, len);
+       ret = bt_field_string_append_with_length(field, value, len);
        if (ret) {
                BT_LOGE("Cannot append substring to string field's value: "
                        "notit-addr=%p, field-addr=%p, string-length=%zu, "
@@ -2469,16 +2011,15 @@ end:
 
 static
 enum bt_btr_status btr_string_end_cb(
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
        struct bt_notif_iter *notit = data;
 
        BT_LOGV("String (end) function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)));
+               "ft-id=%d, ft-in-ir=%d",
+               notit, notit->btr, ft, ft->id, ft->in_ir);
+       BT_ASSERT(ft->in_ir);
 
        /* Pop string field */
        stack_pop(notit->stack);
@@ -2489,19 +2030,19 @@ enum bt_btr_status btr_string_end_cb(
 }
 
 enum bt_btr_status btr_compound_begin_cb(
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
-       enum bt_btr_status status = BT_BTR_STATUS_OK;
        struct bt_notif_iter *notit = data;
        struct bt_field *field;
-       int ret;
 
        BT_LOGV("Compound (beginning) function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)));
+               "ft-id=%d, ft-in-ir=%d",
+               notit, notit->btr, ft, ft->id, ft->in_ir);
+
+       if (!ft->in_ir) {
+               goto end;
+       }
 
        /* Borrow field */
        if (stack_empty(notit->stack)) {
@@ -2509,290 +2050,203 @@ enum bt_btr_status btr_compound_begin_cb(
                field = notit->cur_dscope_field;
        } else {
                field = borrow_next_field(notit);
-               if (!field) {
-                       BT_LOGW("Cannot borrow next field: notit-addr=%p", notit);
-                       status = BT_BTR_STATUS_ERROR;
-                       goto end;
-               }
+               BT_ASSERT(field);
        }
 
        /* Push field */
        BT_ASSERT(field);
-       ret = stack_push(notit->stack, field);
-       if (ret) {
-               BT_LOGE("Cannot push compound field onto the stack: "
-                       "notit-addr=%p, ft-addr=%p, ft-id=%s, ret=%d",
-                       notit, type,
-                       bt_common_field_type_id_string(
-                               bt_field_type_get_type_id(type)),
-                       ret);
-               status = BT_BTR_STATUS_ERROR;
-               goto end;
+       BT_ASSERT(bt_field_borrow_type(field) == ft->ir_ft);
+       stack_push(notit->stack, field);
+
+       /*
+        * Change BTR "unsigned int" callback if it's a text
+        * array/sequence.
+        */
+       if (ft->id == CTF_FIELD_TYPE_ID_ARRAY ||
+                       ft->id == CTF_FIELD_TYPE_ID_SEQUENCE) {
+               struct ctf_field_type_array_base *array_ft = (void *) ft;
+
+               if (array_ft->is_text) {
+                       int ret;
+
+                       BT_ASSERT(bt_field_get_type_id(field) ==
+                               BT_FIELD_TYPE_ID_STRING);
+                       notit->done_filling_string = false;
+                       ret = bt_field_string_clear(field);
+                       BT_ASSERT(ret == 0);
+                       bt_btr_set_unsigned_int_cb(notit->btr,
+                               btr_unsigned_int_char_cb);
+               }
        }
 
 end:
-       return status;
+       return BT_BTR_STATUS_OK;
 }
 
 enum bt_btr_status btr_compound_end_cb(
-               struct bt_field_type *type, void *data)
+               struct ctf_field_type *ft, void *data)
 {
        struct bt_notif_iter *notit = data;
 
        BT_LOGV("Compound (end) function called from BTR: "
                "notit-addr=%p, btr-addr=%p, ft-addr=%p, "
-               "ft-id=%s",
-               notit, notit->btr, type,
-               bt_common_field_type_id_string(
-                       bt_field_type_get_type_id(type)));
-       BT_ASSERT(!stack_empty(notit->stack));
-
-       /* Pop stack */
-       stack_pop(notit->stack);
-
-       /* If the stack is not empty, increment the base's index */
-       if (!stack_empty(notit->stack)) {
-               stack_top(notit->stack)->index++;
-       }
-
-       return BT_BTR_STATUS_OK;
-}
-
-static
-struct bt_field *resolve_field(struct bt_notif_iter *notit,
-               struct bt_field_path *path)
-{
-       struct bt_field *field = NULL;
-       unsigned int i;
-
-       if (BT_LOG_ON_VERBOSE) {
-               GString *gstr = bt_field_path_string(path);
-
-               BT_LOGV("Resolving field path: notit-addr=%p, field-path=\"%s\"",
-                       notit, gstr ? gstr->str : NULL);
-
-               if (gstr) {
-                       g_string_free(gstr, TRUE);
-               }
-       }
-
-       switch (bt_field_path_get_root_scope(path)) {
-       case BT_SCOPE_TRACE_PACKET_HEADER:
-               field = notit->dscopes.trace_packet_header;
-               break;
-       case BT_SCOPE_STREAM_PACKET_CONTEXT:
-               field = notit->dscopes.stream_packet_context;
-               break;
-       case BT_SCOPE_STREAM_EVENT_HEADER:
-               field = notit->dscopes.stream_event_header;
-               break;
-       case BT_SCOPE_STREAM_EVENT_CONTEXT:
-               field = notit->dscopes.stream_event_context;
-               break;
-       case BT_SCOPE_EVENT_CONTEXT:
-               field = notit->dscopes.event_context;
-               break;
-       case BT_SCOPE_EVENT_FIELDS:
-               field = notit->dscopes.event_payload;
-               break;
-       default:
-               BT_LOGF("Cannot resolve field path: unknown scope: "
-                       "notit-addr=%p, root-scope=%s",
-                       notit, bt_common_scope_string(
-                               bt_field_path_get_root_scope(path)));
-               abort();
-       }
+               "ft-id=%d, ft-in-ir=%d",
+               notit, notit->btr, ft, ft->id, ft->in_ir);
 
-       if (!field) {
-               BT_LOGW("Cannot resolve field path: root field not found: "
-                       "notit-addr=%p, root-scope=%s",
-                       notit, bt_common_scope_string(
-                               bt_field_path_get_root_scope(path)));
+       if (!ft->in_ir) {
                goto end;
        }
 
-       for (i = 0; i < bt_field_path_get_index_count(path); ++i) {
-               struct bt_field *next_field = NULL;
-               struct bt_field_type *field_type;
-               int index = bt_field_path_get_index(path, i);
-
-               field_type = bt_field_borrow_type(field);
-               BT_ASSERT(field_type);
+       BT_ASSERT(!stack_empty(notit->stack));
+       BT_ASSERT(bt_field_borrow_type(stack_top(notit->stack)->base) ==
+               ft->ir_ft);
 
-               if (bt_field_type_is_structure(field_type)) {
-                       next_field = bt_field_structure_borrow_field_by_index(
-                               field, index);
-               } else if (bt_field_type_is_variant(field_type)) {
-                       next_field =
-                               bt_field_variant_borrow_current_field(field);
+       /*
+        * Reset BTR "unsigned int" callback if it's a text
+        * array/sequence.
+        */
+       if (ft->id == CTF_FIELD_TYPE_ID_ARRAY ||
+                       ft->id == CTF_FIELD_TYPE_ID_SEQUENCE) {
+               struct ctf_field_type_array_base *array_ft = (void *) ft;
+
+               if (array_ft->is_text) {
+                       BT_ASSERT(bt_field_get_type_id(
+                               stack_top(notit->stack)->base) ==
+                                       BT_FIELD_TYPE_ID_STRING);
+                       bt_btr_set_unsigned_int_cb(notit->btr,
+                               btr_unsigned_int_cb);
                }
+       }
 
-               field = NULL;
-
-               if (!next_field) {
-                       BT_LOGW("Cannot find next field: "
-                               "notit-addr=%p, ft-addr=%p, ft-id=%s, index=%d",
-                               notit, field_type,
-                               bt_common_field_type_id_string(
-                                       bt_field_type_get_type_id(field_type)),
-                               index);
-                       goto end;
-               }
+       /* Pop stack */
+       stack_pop(notit->stack);
 
-               /* Move next field -> field */
-               field = next_field;
+       /* If the stack is not empty, increment the base's index */
+       if (!stack_empty(notit->stack)) {
+               stack_top(notit->stack)->index++;
        }
 
 end:
-       return field;
+       return BT_BTR_STATUS_OK;
 }
 
 static
-int64_t btr_get_sequence_length_cb(struct bt_field_type *type, void *data)
+int64_t btr_get_sequence_length_cb(struct ctf_field_type *ft, void *data)
 {
-       int64_t ret = -1;
-       int iret;
        struct bt_field *seq_field;
-       struct bt_field_path *field_path;
        struct bt_notif_iter *notit = data;
-       struct bt_field *length_field = NULL;
-       uint64_t length;
-
-       field_path = bt_field_type_sequence_borrow_length_field_path(type);
-       BT_ASSERT(field_path);
-       length_field = resolve_field(notit, field_path);
-       if (!length_field) {
-               BT_LOGW("Cannot resolve sequence field type's length field path: "
-                       "notit-addr=%p, ft-addr=%p",
-                       notit, type);
-               goto end;
-       }
-
-       iret = bt_field_integer_unsigned_get_value(length_field, &length);
-       if (iret) {
-               BT_LOGE("Cannot get value of sequence length field: "
-                       "notit-addr=%p, field-addr=%p",
-                       notit, length_field);
-               goto end;
-       }
+       struct ctf_field_type_sequence *seq_ft = (void *) ft;
+       int64_t length = -1;
+       int ret;
 
+       length = (uint64_t) g_array_index(notit->stored_values, uint64_t,
+               seq_ft->stored_length_index);
        seq_field = stack_top(notit->stack)->base;
-       iret = bt_field_sequence_set_length(seq_field, length);
-       if (iret) {
-               BT_LOGE("Cannot set sequence field's length field: "
-                       "notit-addr=%p, seq-field-addr=%p, "
-                       "length=%" PRIu64,
-                       notit, seq_field, length);
-               goto end;
+       BT_ASSERT(seq_field);
+       ret = bt_field_dynamic_array_set_length(seq_field, (uint64_t) length);
+       if (ret) {
+               BT_LOGE("Cannot set dynamic array field's length field: "
+                       "notit-addr=%p, field-addr=%p, "
+                       "length=%" PRIu64, notit, seq_field, length);
        }
 
-       ret = (int64_t) length;
-
-end:
-       return ret;
+       return length;
 }
 
 static
-struct bt_field_type *btr_borrow_variant_field_type_cb(
-               struct bt_field_type *type, void *data)
+struct ctf_field_type *btr_borrow_variant_selected_field_type_cb(
+               struct ctf_field_type *ft, void *data)
 {
        int ret;
-       struct bt_field_path *path;
+       uint64_t i;
+       int64_t option_index = -1;
        struct bt_notif_iter *notit = data;
-       struct bt_field *var_field;
-       struct bt_field *tag_field = NULL;
-       struct bt_field_type *tag_ft = NULL;
-       struct bt_field_type *tag_int_ft = NULL;
-       struct bt_field *selected_field = NULL;
-       struct bt_field_type *selected_field_type = NULL;
-
-       path = bt_field_type_variant_borrow_tag_field_path(type);
-       BT_ASSERT(path);
-       tag_field = resolve_field(notit, path);
-       if (!tag_field) {
-               BT_LOGW("Cannot resolve variant field type's tag field path: "
-                       "notit-addr=%p, ft-addr=%p",
-                       notit, type);
-               goto end;
-       }
+       struct ctf_field_type_variant *var_ft = (void *) ft;
+       struct ctf_named_field_type *selected_option = NULL;
+       struct ctf_field_type *ret_ft = NULL;
+       union {
+               uint64_t u;
+               int64_t i;
+       } tag;
+
+       /* Get variant's tag */
+       tag.u = g_array_index(notit->stored_values, uint64_t,
+               var_ft->stored_tag_index);
 
        /*
-        * We found the enumeration tag field instance which should be
-        * able to select a current field for this variant. This
-        * callback function we're in is called _after_
-        * compound_begin(), so the current stack top's base field is
-        * the variant field in question. We set the variant field's tag
-        * here and then get the current (selected) field thanks to this
-        * tag field's value. This current field will also provide us
-        * with its type. Then, this current field will remain the
-        * current selected one until the next callback function call
-        * which is used to fill it.
+        * Check each range to find the selected option's index.
         */
-       var_field = stack_top(notit->stack)->base;
-       tag_ft = bt_field_borrow_type(tag_field);
-       tag_int_ft = bt_field_type_enumeration_borrow_container_field_type(
-               tag_ft);
-
-       if (bt_field_type_integer_is_signed(tag_int_ft)) {
-               int64_t tag_value;
-
-               ret = bt_field_integer_signed_get_value(tag_field, &tag_value);
-               BT_ASSERT(ret == 0);
-               ret = bt_field_variant_set_tag_signed(var_field, tag_value);
-               BT_ASSERT(ret == 0);
+       if (var_ft->tag_ft->base.is_signed) {
+               for (i = 0; i < var_ft->ranges->len; i++) {
+                       struct ctf_field_type_variant_range *range =
+                               ctf_field_type_variant_borrow_range_by_index(
+                                       var_ft, i);
+
+                       if (tag.i >= range->range.lower.i &&
+                                       tag.i <= range->range.upper.i) {
+                               option_index = (int64_t) range->option_index;
+                               break;
+                       }
+               }
        } else {
-               uint64_t tag_value;
-
-               ret = bt_field_integer_unsigned_get_value(tag_field,
-                       &tag_value);
-               BT_ASSERT(ret == 0);
-               ret = bt_field_variant_set_tag_unsigned(var_field, tag_value);
-               BT_ASSERT(ret == 0);
+               for (i = 0; i < var_ft->ranges->len; i++) {
+                       struct ctf_field_type_variant_range *range =
+                               ctf_field_type_variant_borrow_range_by_index(
+                                       var_ft, i);
+
+                       if (tag.u >= range->range.lower.u &&
+                                       tag.u <= range->range.upper.u) {
+                               option_index = (int64_t) range->option_index;
+                               break;
+                       }
+               }
        }
 
-       selected_field = bt_field_variant_borrow_current_field(var_field);
-       if (!selected_field) {
-               BT_LOGW("Cannot borrow variant field's current field: "
-                       "notit-addr=%p, var-field-addr=%p",
-                       notit, var_field);
+       if (option_index < 0) {
+               BT_LOGW("Cannot find variant field type's option: "
+                       "notit-addr=%p, var-ft-addr=%p, u-tag=%" PRIu64 ", "
+                       "i-tag=%" PRId64, notit, var_ft, tag.u, tag.i);
                goto end;
        }
 
-       selected_field_type = bt_field_borrow_type(selected_field);
+       selected_option = ctf_field_type_variant_borrow_option_by_index(
+               var_ft, (uint64_t) option_index);
 
-end:
-       return selected_field_type;
-}
-
-static
-int set_event_clocks(struct bt_notif_iter *notit)
-{
-       int ret;
-       GHashTableIter iter;
-       struct bt_clock_class *clock_class;
-       uint64_t *clock_state;
-
-       g_hash_table_iter_init(&iter, notit->clock_states);
+       if (selected_option->ft->in_ir) {
+               struct bt_field *var_field = stack_top(notit->stack)->base;
 
-       while (g_hash_table_iter_next(&iter, (gpointer) &clock_class,
-                       (gpointer) &clock_state)) {
-               ret = bt_event_set_clock_value(notit->event, clock_class,
-                       *clock_state, BT_TRUE);
+               ret = bt_field_variant_select_option_field(var_field,
+                       option_index);
                if (ret) {
-                       BT_LOGE("Cannot set event's default clock value: "
-                               "notit-addr=%p, clock-class-addr=%p, "
-                               "clock-class-name=\"%s\"",
-                               notit, clock_class,
-                               bt_clock_class_get_name(clock_class));
-                       ret = -1;
+                       BT_LOGW("Cannot select variant field's option field: "
+                               "notit-addr=%p, var-field-addr=%p, "
+                               "opt-index=%" PRId64, notit, var_field,
+                               option_index);
                        goto end;
                }
        }
 
-       ret = 0;
+       ret_ft = selected_option->ft;
 
 end:
-       return ret;
+       return ret_ft;
+}
+
+static
+void set_event_default_clock_value(struct bt_notif_iter *notit)
+{
+       struct bt_event *event = bt_notification_event_borrow_event(
+               notit->event_notif);
+       struct bt_stream_class *sc = notit->meta.sc->ir_sc;
+
+       BT_ASSERT(event);
+
+       if (bt_stream_class_borrow_default_clock_class(sc)) {
+               int ret = bt_event_set_default_clock_value(event,
+                       notit->default_clock_val);
+
+               BT_ASSERT(ret == 0);
+       }
 }
 
 static
@@ -2854,6 +2308,7 @@ void notify_new_packet(struct bt_notif_iter *notit,
        int ret;
        enum bt_notif_iter_status status;
        struct bt_notification *notif = NULL;
+       struct bt_stream_class *sc;
 
        status = set_current_packet(notit);
        if (status != BT_NOTIF_ITER_STATUS_OK) {
@@ -2861,9 +2316,39 @@ void notify_new_packet(struct bt_notif_iter *notit,
        }
 
        BT_ASSERT(notit->packet);
+       sc = notit->meta.sc->ir_sc;
+       BT_ASSERT(sc);
+
+       if (bt_stream_class_packets_have_discarded_event_counter_snapshot(sc)) {
+               BT_ASSERT(notit->snapshots.discarded_events != UINT64_C(-1));
+               ret = bt_packet_set_discarded_event_counter_snapshot(
+                       notit->packet, notit->snapshots.discarded_events);
+               BT_ASSERT(ret == 0);
+       }
+
+       if (bt_stream_class_packets_have_packet_counter_snapshot(sc)) {
+               BT_ASSERT(notit->snapshots.packets != UINT64_C(-1));
+               ret = bt_packet_set_packet_counter_snapshot(
+                       notit->packet, notit->snapshots.packets);
+               BT_ASSERT(ret == 0);
+       }
+
+       if (bt_stream_class_packets_have_default_beginning_clock_value(sc)) {
+               BT_ASSERT(notit->snapshots.beginning_clock != UINT64_C(-1));
+               ret = bt_packet_set_default_beginning_clock_value(
+                       notit->packet, notit->snapshots.beginning_clock);
+               BT_ASSERT(ret == 0);
+       }
+
+       if (bt_stream_class_packets_have_default_end_clock_value(sc)) {
+               BT_ASSERT(notit->snapshots.end_clock != UINT64_C(-1));
+               ret = bt_packet_set_default_end_clock_value(
+                       notit->packet, notit->snapshots.end_clock);
+               BT_ASSERT(ret == 0);
+       }
 
        if (notit->packet_header_field) {
-               ret = bt_packet_move_header(notit->packet,
+               ret = bt_packet_move_header_field(notit->packet,
                        notit->packet_header_field);
                if (ret) {
                        goto end;
@@ -2876,12 +2361,12 @@ void notify_new_packet(struct bt_notif_iter *notit,
                 * the same value as the packet header field within
                 * notit->packet.
                 */
-               BT_ASSERT(bt_packet_borrow_header(notit->packet) ==
+               BT_ASSERT(bt_packet_borrow_header_field(notit->packet) ==
                        notit->dscopes.trace_packet_header);
        }
 
        if (notit->packet_context_field) {
-               ret = bt_packet_move_context(notit->packet,
+               ret = bt_packet_move_context_field(notit->packet,
                        notit->packet_context_field);
                if (ret) {
                        goto end;
@@ -2894,7 +2379,7 @@ void notify_new_packet(struct bt_notif_iter *notit,
                 * the same value as the packet header field within
                 * notit->packet.
                 */
-               BT_ASSERT(bt_packet_borrow_context(notit->packet) ==
+               BT_ASSERT(bt_packet_borrow_context_field(notit->packet) ==
                        notit->dscopes.stream_packet_context);
        }
 
@@ -2924,6 +2409,11 @@ void notify_end_of_packet(struct bt_notif_iter *notit,
                return;
        }
 
+       /* Update default clock from packet's end time */
+       if (notit->snapshots.end_clock != UINT64_C(-1)) {
+               notit->default_clock_val = notit->snapshots.end_clock;
+       }
+
        BT_ASSERT(notit->notif_iter);
        notif = bt_notification_packet_end_create(notit->notif_iter,
                notit->packet);
@@ -2935,61 +2425,12 @@ void notify_end_of_packet(struct bt_notif_iter *notit,
 
        }
 
-       BT_MOVE(notit->prev_packet, notit->packet);
-       notit->prev_packet_avail =
-               BT_PACKET_PREVIOUS_PACKET_AVAILABILITY_AVAILABLE;
+       BT_PUT(notit->packet);
        *notification = notif;
 }
 
-static
-void init_trace_field_path_cache(struct bt_trace *trace,
-               struct trace_field_path_cache *trace_field_path_cache)
-{
-       int stream_id = -1;
-       int stream_instance_id = -1;
-       int i, count;
-       struct bt_field_type *packet_header = NULL;
-
-       packet_header = bt_trace_borrow_packet_header_field_type(trace);
-       if (!packet_header) {
-               goto end;
-       }
-
-       if (!bt_field_type_is_structure(packet_header)) {
-               goto end;
-       }
-
-       count = bt_field_type_structure_get_field_count(packet_header);
-       BT_ASSERT(count >= 0);
-
-       for (i = 0; (i < count && (stream_id == -1 || stream_instance_id == -1)); i++) {
-               int ret;
-               const char *field_name;
-
-               ret = bt_field_type_structure_borrow_field_by_index(
-                       packet_header, &field_name, NULL, i);
-               if (ret) {
-                       BT_LOGE("Cannot get structure field's field: "
-                               "field-addr=%p, index=%d",
-                               packet_header, i);
-                       goto end;
-               }
-
-               if (stream_id == -1 && !strcmp(field_name, "stream_id")) {
-                       stream_id = i;
-               } else if (stream_instance_id == -1 &&
-                               !strcmp(field_name, "stream_instance_id")) {
-                       stream_instance_id = i;
-               }
-       }
-
-end:
-       trace_field_path_cache->stream_id = stream_id;
-       trace_field_path_cache->stream_instance_id = stream_instance_id;
-}
-
 BT_HIDDEN
-struct bt_notif_iter *bt_notif_iter_create(struct bt_trace *trace,
+struct bt_notif_iter *bt_notif_iter_create(struct ctf_trace_class *tc,
                size_t max_request_sz,
                struct bt_notif_iter_medium_ops medops, void *data)
 {
@@ -3007,33 +2448,29 @@ struct bt_notif_iter *bt_notif_iter_create(struct bt_trace *trace,
                },
                .query = {
                        .get_sequence_length = btr_get_sequence_length_cb,
-                       .borrow_variant_field_type = btr_borrow_variant_field_type_cb,
+                       .borrow_variant_selected_field_type = btr_borrow_variant_selected_field_type_cb,
                },
        };
 
-       BT_ASSERT(trace);
+       BT_ASSERT(tc);
        BT_ASSERT(medops.request_bytes);
        BT_ASSERT(medops.borrow_stream);
        BT_LOGD("Creating CTF plugin notification iterator: "
                "trace-addr=%p, trace-name=\"%s\", max-request-size=%zu, "
-               "data=%p",
-               trace, bt_trace_get_name(trace), max_request_sz, data);
+               "data=%p", tc, tc->name->str, max_request_sz, data);
        notit = g_new0(struct bt_notif_iter, 1);
        if (!notit) {
                BT_LOGE_STR("Failed to allocate one CTF plugin notification iterator.");
                goto end;
        }
-       notit->clock_states = g_hash_table_new_full(g_direct_hash,
-               g_direct_equal, NULL, g_free);
-       if (!notit->clock_states) {
-               BT_LOGE_STR("Failed to allocate a GHashTable.");
-               goto error;
-       }
-       notit->meta.trace = trace;
+       notit->meta.tc = tc;
        notit->medium.medops = medops;
        notit->medium.max_request_sz = max_request_sz;
        notit->medium.data = data;
        notit->stack = stack_new(notit);
+       notit->stored_values = g_array_new(FALSE, TRUE, sizeof(uint64_t));
+       g_array_set_size(notit->stored_values, tc->stored_value_count);
+
        if (!notit->stack) {
                BT_LOGE_STR("Failed to create field stack.");
                goto error;
@@ -3046,25 +2483,10 @@ struct bt_notif_iter *bt_notif_iter_create(struct bt_trace *trace,
        }
 
        bt_notif_iter_reset(notit);
-       init_trace_field_path_cache(trace, &notit->trace_field_path_cache);
-       notit->sc_field_path_caches = g_hash_table_new_full(g_direct_hash,
-               g_direct_equal, NULL, g_free);
-       if (!notit->sc_field_path_caches) {
-               BT_LOGE_STR("Failed to allocate a GHashTable.");
-               goto error;
-       }
-
-       notit->field_overrides = g_hash_table_new_full(g_direct_hash,
-               g_direct_equal, NULL, g_free);
-       if (!notit->field_overrides) {
-               BT_LOGE_STR("Failed to allocate a GHashTable.");
-               goto error;
-       }
-
        BT_LOGD("Created CTF plugin notification iterator: "
                "trace-addr=%p, trace-name=\"%s\", max-request-size=%zu, "
                "data=%p, notit-addr=%p",
-               trace, bt_trace_get_name(trace), max_request_sz, data,
+               tc, tc->name->str, max_request_sz, data,
                notit);
        notit->cur_packet_offset = 0;
 
@@ -3080,7 +2502,6 @@ error:
 void bt_notif_iter_destroy(struct bt_notif_iter *notit)
 {
        BT_PUT(notit->packet);
-       BT_PUT(notit->prev_packet);
        BT_PUT(notit->stream);
        release_all_dscopes(notit);
 
@@ -3096,16 +2517,8 @@ void bt_notif_iter_destroy(struct bt_notif_iter *notit)
                bt_btr_destroy(notit->btr);
        }
 
-       if (notit->clock_states) {
-               g_hash_table_destroy(notit->clock_states);
-       }
-
-       if (notit->sc_field_path_caches) {
-               g_hash_table_destroy(notit->sc_field_path_caches);
-       }
-
-       if (notit->field_overrides) {
-               g_hash_table_destroy(notit->field_overrides);
+       if (notit->stored_values) {
+               g_array_free(notit->stored_values, TRUE);
        }
 
        g_free(notit);
@@ -3116,7 +2529,6 @@ enum bt_notif_iter_status bt_notif_iter_get_next_notification(
                struct bt_private_connection_private_notification_iterator *notif_iter,
                struct bt_notification **notification)
 {
-       int ret;
        enum bt_notif_iter_status status = BT_NOTIF_ITER_STATUS_OK;
 
        BT_ASSERT(notit);
@@ -3173,14 +2585,17 @@ enum bt_notif_iter_status bt_notif_iter_get_next_notification(
                case STATE_EMIT_NOTIF_NEW_STREAM:
                        /* notify_new_stream() logs errors */
                        notify_new_stream(notit, notification);
+
                        if (!*notification) {
                                status = BT_NOTIF_ITER_STATUS_ERROR;
                        }
+
                        notit->stream_begin_emitted = true;
                        goto end;
                case STATE_EMIT_NOTIF_NEW_PACKET:
                        /* notify_new_packet() logs errors */
                        notify_new_packet(notit, notification);
+
                        if (!*notification) {
                                status = BT_NOTIF_ITER_STATUS_ERROR;
                        }
@@ -3188,32 +2603,14 @@ enum bt_notif_iter_status bt_notif_iter_get_next_notification(
                        goto end;
                case STATE_EMIT_NOTIF_EVENT:
                        BT_ASSERT(notit->event_notif);
-                       ret = set_event_clocks(notit);
-                       if (ret) {
-                               status = BT_NOTIF_ITER_STATUS_ERROR;
-                               goto end;
-                       }
-
+                       set_event_default_clock_value(notit);
                        *notification = notit->event_notif;
                        notit->event_notif = NULL;
                        goto end;
                case STATE_EMIT_NOTIF_END_OF_PACKET:
-                       /* Update clock with timestamp_end field. */
-                       if (notit->cur_timestamp_end) {
-                               enum bt_btr_status btr_status;
-
-                               btr_status = update_clock(notit,
-                                       notit->cur_timestamp_end);
-                               if (btr_status != BT_BTR_STATUS_OK) {
-                                       BT_LOGW("Cannot update stream's clock value: "
-                                               "notit-addr=%p", notit);
-                                       status = BT_NOTIF_ITER_STATUS_ERROR;
-                                       goto end;
-                               }
-                       }
-
                        /* notify_end_of_packet() logs errors */
                        notify_end_of_packet(notit, notification);
+
                        if (!*notification) {
                                status = BT_NOTIF_ITER_STATUS_ERROR;
                        }
@@ -3338,8 +2735,7 @@ enum bt_notif_iter_status bt_notif_iter_seek(
        }
 
        medium_status = notit->medium.medops.seek(
-                       BT_NOTIF_ITER_SEEK_WHENCE_SET, offset,
-                       notit->medium.data);
+               BT_NOTIF_ITER_SEEK_WHENCE_SET, offset, notit->medium.data);
        if (medium_status != BT_NOTIF_ITER_MEDIUM_STATUS_OK) {
                if (medium_status == BT_NOTIF_ITER_MEDIUM_STATUS_EOF) {
                        ret = BT_NOTIF_ITER_STATUS_EOF;
@@ -3351,13 +2747,13 @@ enum bt_notif_iter_status bt_notif_iter_seek(
 
        bt_notif_iter_reset(notit);
        notit->cur_packet_offset = offset;
+
 end:
        return ret;
 }
 
 BT_HIDDEN
-off_t bt_notif_iter_get_current_packet_offset(
-               struct bt_notif_iter *notit)
+off_t bt_notif_iter_get_current_packet_offset(struct bt_notif_iter *notit)
 {
        BT_ASSERT(notit);
        return notit->cur_packet_offset;
@@ -3368,5 +2764,36 @@ off_t bt_notif_iter_get_current_packet_size(
                struct bt_notif_iter *notit)
 {
        BT_ASSERT(notit);
-       return notit->cur_packet_size;
+       return notit->cur_exp_packet_total_size;
+}
+
+BT_HIDDEN
+void bt_notif_trace_class_changed(struct bt_notif_iter *notit)
+{
+       if (notit->meta.tc->stored_value_count > notit->stored_values->len) {
+               g_array_set_size(notit->stored_values,
+                       notit->meta.tc->stored_value_count);
+       }
+}
+
+BT_HIDDEN
+enum bt_notif_iter_status bt_notif_iter_get_packet_properties(
+               struct bt_notif_iter *notit,
+               struct bt_notif_iter_packet_properties *props)
+{
+       BT_ASSERT(notit);
+       BT_ASSERT(props);
+
+       props->exp_packet_total_size =
+               (uint64_t) notit->cur_exp_packet_total_size;
+       props->exp_packet_content_size =
+               (uint64_t) notit->cur_exp_packet_content_size;
+       BT_ASSERT(props->stream_class_id >= 0);
+       props->stream_class_id = (uint64_t) notit->cur_stream_class_id;
+       props->data_stream_id = notit->cur_data_stream_id;
+       props->snapshots.discarded_events = notit->snapshots.discarded_events;
+       props->snapshots.packets = notit->snapshots.packets;
+       props->snapshots.beginning_clock = notit->snapshots.beginning_clock;
+       props->snapshots.end_clock = notit->snapshots.end_clock;
+       return BT_NOTIF_ITER_STATUS_OK;
 }
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