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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/media/video/cx18/cx18-alsa.h
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/*

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 *  ALSA interface to cx18 PCM capture streams

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 *

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 *  Copyright (C) 2009  Andy Walls <[email protected]>

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 *

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 *  This program is free software; you can redistribute it and/or modify

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 *  it under the terms of the GNU General Public License as published by

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 *  the Free Software Foundation; either version 2 of the License, or

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 *  (at your option) any later version.

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 *

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 *  This program is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License

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 *  along with this program; if not, write to the Free Software

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 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

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 *  02111-1307  USA

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 */

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struct snd_card;

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struct snd_cx18_card {

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	struct v4l2_device *v4l2_dev;

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	struct snd_card *sc;

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	unsigned int capture_transfer_done;

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	unsigned int hwptr_done_capture;

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	struct snd_pcm_substream *capture_pcm_substream;

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	spinlock_t slock;

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};

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extern int cx18_alsa_debug;

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/*

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 * File operations that manipulate the encoder or video or audio subdevices

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 * need to be serialized.  Use the same lock we use for v4l2 file ops.

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 */

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static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)

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{

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	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);

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	mutex_lock(&cx->serialize_lock);

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}

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static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)

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{

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	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);

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	mutex_unlock(&cx->serialize_lock);

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}

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#define CX18_ALSA_DBGFLG_WARN  (1 << 0)

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#define CX18_ALSA_DBGFLG_WARN  (1 << 0)

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#define CX18_ALSA_DBGFLG_INFO  (1 << 1)

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#define CX18_ALSA_DEBUG(x, type, fmt, args...) \

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	do { \

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		if ((x) & cx18_alsa_debug) \

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			printk(KERN_INFO "%s-alsa: " type ": " fmt, \

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				v4l2_dev->name , ## args); \

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	} while (0)

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#define CX18_ALSA_DEBUG_WARN(fmt, args...) \

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	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)

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#define CX18_ALSA_DEBUG_INFO(fmt, args...) \

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	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)

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#define CX18_ALSA_ERR(fmt, args...) \

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	printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)

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#define CX18_ALSA_WARN(fmt, args...) \

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	printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)

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#define CX18_ALSA_INFO(fmt, args...) \

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	printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)

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