LXR linux/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
  18struct snd_card;
  19
  20struct 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
  29extern 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 */
  35static 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
  41static 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)
  71