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
  18 struct snd_card;
  19
  20 struct snd_ivtv_card {
  21         struct v4l2_device *v4l2_dev;
  22         struct snd_card *sc;
  23         unsigned int capture_transfer_done;
  24         unsigned int hwptr_done_capture;
  25         struct snd_pcm_substream *capture_pcm_substream;
  26         spinlock_t slock;
  27 };
  28
  29 extern int ivtv_alsa_debug;
  30
  31 /*
  32  * File operations that manipulate the encoder or video or audio subdevices
  33  * need to be serialized.  Use the same lock we use for v4l2 file ops.
  34  */
  35 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
  36 {
  37         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  38         mutex_lock(&itv->serialize_lock);
  39 }
  40
  41 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
  42 {
  43         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  44         mutex_unlock(&itv->serialize_lock);
  45 }
  46
  47 #define IVTV_ALSA_DBGFLG_WARN  (1 << 0)
  48 #define IVTV_ALSA_DBGFLG_INFO  (1 << 1)
  49
  50 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
  51         do { \
  52                 if ((x) & ivtv_alsa_debug) \
  53                         pr_info("%s-alsa: " type ": " fmt, \
  54                                 v4l2_dev->name , ## args); \
  55         } while (0)
  56
  57 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
  58         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  59
  60 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
  61         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  62
  63 #define IVTV_ALSA_ERR(fmt, args...) \
  64         pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
  65
  66 #define IVTV_ALSA_WARN(fmt, args...) \
  67         pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
  68
  69 #define IVTV_ALSA_INFO(fmt, args...) \
  70         pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)