Documentation/video4linux/cx2341x/fw-decoder-api.txt

   1 Decoder firmware API description
   2 ================================
   3
   4 Note: this API is part of the decoder firmware, so it's cx23415 only.
   5
   6 -------------------------------------------------------------------------------
   7
   8 Name    CX2341X_DEC_PING_FW
   9 Enum    0/0x00
  10 Description
  11         This API call does nothing. It may be used to check if the firmware
  12         is responding.
  13
  14 -------------------------------------------------------------------------------
  15
  16 Name    CX2341X_DEC_START_PLAYBACK
  17 Enum    1/0x01
  18 Description
  19         Begin or resume playback.
  20 Param[0]
  21         0 based frame number in GOP to begin playback from.
  22 Param[1]
  23         Specifies the number of muted audio frames to play before normal
  24         audio resumes.
  25
  26 -------------------------------------------------------------------------------
  27
  28 Name    CX2341X_DEC_STOP_PLAYBACK
  29 Enum    2/0x02
  30 Description
  31         Ends playback and clears all decoder buffers. If PTS is not zero,
  32         playback stops at specified PTS.
  33 Param[0]
  34         Display 0=last frame, 1=black
  35 Param[1]
  36         PTS low
  37 Param[2]
  38         PTS high
  39
  40 -------------------------------------------------------------------------------
  41
  42 Name    CX2341X_DEC_SET_PLAYBACK_SPEED
  43 Enum    3/0x03
  44 Description
  45         Playback stream at speed other than normal. There are two modes of
  46         operation:
  47             Smooth: host transfers entire stream and firmware drops unused
  48                     frames.
  49             Coarse: host drops frames based on indexing as required to achieve
  50                     desired speed.
  51 Param[0]
  52         Bitmap:
  53             0:7  0 normal
  54                  1 fast only "1.5 times"
  55                  n nX fast, 1/nX slow
  56             30   Framedrop:
  57                      '0' during 1.5 times play, every other B frame is dropped
  58                      '1' during 1.5 times play, stream is unchanged (bitrate
  59                          must not exceed 8mbps)
  60             31   Speed:
  61                      '0' slow
  62                      '1' fast
  63 Param[1]
  64         Direction: 0=forward, 1=reverse
  65 Param[2]
  66         Picture mask:
  67             1=I frames
  68             3=I, P frames
  69             7=I, P, B frames
  70 Param[3]
  71         B frames per GOP (for reverse play only)
  72 Param[4]
  73         Mute audio: 0=disable, 1=enable
  74 Param[5]
  75         Display 0=frame, 1=field
  76 Param[6]
  77         Specifies the number of muted audio frames to play before normal audio
  78         resumes.
  79
  80 -------------------------------------------------------------------------------
  81
  82 Name    CX2341X_DEC_STEP_VIDEO
  83 Enum    5/0x05
  84 Description
  85         Each call to this API steps the playback to the next unit defined below
  86         in the current playback direction.
  87 Param[0]
  88         0=frame, 1=top field, 2=bottom field
  89
  90 -------------------------------------------------------------------------------
  91
  92 Name    CX2341X_DEC_SET_DMA_BLOCK_SIZE
  93 Enum    8/0x08
  94 Description
  95         Set DMA transfer block size. Counterpart to API 0xC9
  96 Param[0]
  97         DMA transfer block size in bytes. A different size may be specified
  98         when issuing the DMA transfer command.
  99
 100 -------------------------------------------------------------------------------
 101
 102 Name    CX2341X_DEC_GET_XFER_INFO
 103 Enum    9/0x09
 104 Description
 105         This API call may be used to detect an end of stream condition.
 106 Result[0]
 107         Stream type
 108 Result[1]
 109         Address offset
 110 Result[2]
 111         Maximum bytes to transfer
 112 Result[3]
 113         Buffer fullness
 114
 115 -------------------------------------------------------------------------------
 116
 117 Name    CX2341X_DEC_GET_DMA_STATUS
 118 Enum    10/0x0A
 119 Description
 120         Status of the last DMA transfer
 121 Result[0]
 122         Bit 1 set means transfer complete
 123         Bit 2 set means DMA error
 124         Bit 3 set means linked list error
 125 Result[1]
 126         DMA type: 0=MPEG, 1=OSD, 2=YUV
 127
 128 -------------------------------------------------------------------------------
 129
 130 Name    CX2341X_DEC_SCHED_DMA_FROM_HOST
 131 Enum    11/0x0B
 132 Description
 133         Setup DMA from host operation. Counterpart to API 0xCC
 134 Param[0]
 135         Memory address of link list
 136 Param[1]
 137         Total # of bytes to transfer
 138 Param[2]
 139         DMA type (0=MPEG, 1=OSD, 2=YUV)
 140
 141 -------------------------------------------------------------------------------
 142
 143 Name    CX2341X_DEC_PAUSE_PLAYBACK
 144 Enum    13/0x0D
 145 Description
 146         Freeze playback immediately. In this mode, when internal buffers are
 147         full, no more data will be accepted and data request IRQs will be
 148         masked.
 149 Param[0]
 150         Display: 0=last frame, 1=black
 151
 152 -------------------------------------------------------------------------------
 153
 154 Name    CX2341X_DEC_HALT_FW
 155 Enum    14/0x0E
 156 Description
 157         The firmware is halted and no further API calls are serviced until
 158         the firmware is uploaded again.
 159
 160 -------------------------------------------------------------------------------
 161
 162 Name    CX2341X_DEC_SET_STANDARD
 163 Enum    16/0x10
 164 Description
 165         Selects display standard
 166 Param[0]
 167         0=NTSC, 1=PAL
 168
 169 -------------------------------------------------------------------------------
 170
 171 Name    CX2341X_DEC_GET_VERSION
 172 Enum    17/0x11
 173 Description
 174         Returns decoder firmware version information
 175 Result[0]
 176         Version bitmask:
 177             Bits  0:15 build
 178             Bits 16:23 minor
 179             Bits 24:31 major
 180
 181 -------------------------------------------------------------------------------
 182
 183 Name    CX2341X_DEC_SET_STREAM_INPUT
 184 Enum    20/0x14
 185 Description
 186         Select decoder stream input port
 187 Param[0]
 188         0=memory (default), 1=streaming
 189
 190 -------------------------------------------------------------------------------
 191
 192 Name    CX2341X_DEC_GET_TIMING_INFO
 193 Enum    21/0x15
 194 Description
 195         Returns timing information from start of playback
 196 Result[0]
 197         Frame count by decode order
 198 Result[1]
 199         Video PTS bits 0:31 by display order
 200 Result[2]
 201         Video PTS bit 32 by display order
 202 Result[3]
 203         SCR bits 0:31 by display order
 204 Result[4]
 205         SCR bit 32 by display order
 206
 207 -------------------------------------------------------------------------------
 208
 209 Name    CX2341X_DEC_SET_AUDIO_MODE
 210 Enum    22/0x16
 211 Description
 212         Select audio mode
 213 Param[0]
 214         Dual mono mode action
 215 Param[1]
 216         Stereo mode action:
 217             0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged
 218
 219 -------------------------------------------------------------------------------
 220
 221 Name    CX2341X_DEC_SET_EVENT_NOTIFICATION
 222 Enum    23/0x17
 223 Description
 224         Setup firmware to notify the host about a particular event.
 225         Counterpart to API 0xD5
 226 Param[0]
 227         Event: 0=Audio mode change between stereo and dual channel
 228 Param[1]
 229         Notification 0=disabled, 1=enabled
 230 Param[2]
 231         Interrupt bit
 232 Param[3]
 233         Mailbox slot, -1 if no mailbox required.
 234
 235 -------------------------------------------------------------------------------
 236
 237 Name    CX2341X_DEC_SET_DISPLAY_BUFFERS
 238 Enum    24/0x18
 239 Description
 240         Number of display buffers. To decode all frames in reverse playback you
 241         must use nine buffers.
 242 Param[0]
 243         0=six buffers, 1=nine buffers
 244
 245 -------------------------------------------------------------------------------
 246
 247 Name    CX2341X_DEC_EXTRACT_VBI
 248 Enum    25/0x19
 249 Description
 250         Extracts VBI data
 251 Param[0]
 252         0=extract from extension & user data, 1=extract from private packets
 253 Result[0]
 254         VBI table location
 255 Result[1]
 256         VBI table size
 257
 258 -------------------------------------------------------------------------------
 259
 260 Name    CX2341X_DEC_SET_DECODER_SOURCE
 261 Enum    26/0x1A
 262 Description
 263         Selects decoder source. Ensure that the parameters passed to this
 264         API match the encoder settings.
 265 Param[0]
 266         Mode: 0=MPEG from host, 1=YUV from encoder, 2=YUV from host
 267 Param[1]
 268         YUV picture width
 269 Param[2]
 270         YUV picture height
 271 Param[3]
 272         Bitmap: see Param[0] of API 0xBD
 273
 274 -------------------------------------------------------------------------------
 275
 276 Name    CX2341X_DEC_SET_AUDIO_OUTPUT
 277 Enum    27/0x1B
 278 Description
 279         Select audio output format
 280 Param[0]
 281         Bitmask:
 282              0:1  Data size:
 283                       '00' 16 bit
 284                       '01' 20 bit
 285                       '10' 24 bit
 286              2:7  Unused
 287              8:9  Mode:
 288                       '00' 2 channels
 289                       '01' 4 channels
 290                       '10' 6 channels
 291                       '11' 6 channels with one line data mode
 292                            (for left justified MSB first mode, 20 bit only)
 293             10:11 Unused
 294             12:13 Channel format:
 295                       '00' right justified MSB first mode
 296                       '01' left justified MSB first mode
 297                       '10' I2S mode
 298             14:15 Unused
 299             16:21 Right justify bit count
 300             22:31 Unused
 301
 302 -------------------------------------------------------------------------------
 303
 304 Name    CX2341X_DEC_SET_AV_DELAY
 305 Enum    28/0x1C
 306 Description
 307         Set audio/video delay in 90Khz ticks
 308 Param[0]
 309         0=A/V in sync, negative=audio lags, positive=video lags
 310
 311 -------------------------------------------------------------------------------
 312
 313 Name    CX2341X_DEC_SET_PREBUFFERING
 314 Enum    30/0x1E
 315 Description
 316         Decoder prebuffering, when enabled up to 128KB are buffered for
 317         streams <8mpbs or 640KB for streams >8mbps
 318 Param[0]
 319         0=off, 1=on