drivers/media/pci/ivtv/ivtv-alsa.h

   1 /*
   2  *  ALSA interface to ivtv PCM capture streams
   3  *
   4  *  Copyright (C) 2009,2012  Andy Walls <awalls@md.metrocast.net>
   5  *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20  *  02111-1307  USA
  21  */
  22
  23 struct snd_card;
  24
  25 struct snd_ivtv_card {
  26         struct v4l2_device *v4l2_dev;
  27         struct snd_card *sc;
  28         unsigned int capture_transfer_done;
  29         unsigned int hwptr_done_capture;
  30         struct snd_pcm_substream *capture_pcm_substream;
  31         spinlock_t slock;
  32 };
  33
  34 extern int ivtv_alsa_debug;
  35
  36 /*
  37  * File operations that manipulate the encoder or video or audio subdevices
  38  * need to be serialized.  Use the same lock we use for v4l2 file ops.
  39  */
  40 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
  41 {
  42         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  43         mutex_lock(&itv->serialize_lock);
  44 }
  45
  46 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
  47 {
  48         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  49         mutex_unlock(&itv->serialize_lock);
  50 }
  51
  52 #define IVTV_ALSA_DBGFLG_WARN  (1 << 0)
  53 #define IVTV_ALSA_DBGFLG_INFO  (1 << 1)
  54
  55 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
  56         do { \
  57                 if ((x) & ivtv_alsa_debug) \
  58                         pr_info("%s-alsa: " type ": " fmt, \
  59                                 v4l2_dev->name , ## args); \
  60         } while (0)
  61
  62 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
  63         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  64
  65 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
  66         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  67
  68 #define IVTV_ALSA_ERR(fmt, args...) \
  69         pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
  70
  71 #define IVTV_ALSA_WARN(fmt, args...) \
  72         pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
  73
  74 #define IVTV_ALSA_INFO(fmt, args...) \
  75         pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)