linux/include/sound/pcm-indirect.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Helper functions for indirect PCM data transfer
 *
 *  Copyright (c) by Takashi Iwai <[email protected]>
 *                   Jaroslav Kysela <[email protected]>
 */

#ifndef __SOUND_PCM_INDIRECT_H
#define __SOUND_PCM_INDIRECT_H

#include <sound/pcm.h>

struct snd_pcm_indirect { … };

snd_pcm_indirect_copy_t;

/*
 * helper function for playback ack callback
 */
static inline int
snd_pcm_indirect_playback_transfer(struct snd_pcm_substream *substream,
				   struct snd_pcm_indirect *rec,
				   snd_pcm_indirect_copy_t copy)
{ … }

/*
 * helper function for playback pointer callback
 * ptr = current byte pointer
 */
static inline snd_pcm_uframes_t
snd_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream,
				  struct snd_pcm_indirect *rec, unsigned int ptr)
{ … }


/*
 * helper function for capture ack callback
 */
static inline int
snd_pcm_indirect_capture_transfer(struct snd_pcm_substream *substream,
				  struct snd_pcm_indirect *rec,
				  snd_pcm_indirect_copy_t copy)
{ … }

/*
 * helper function for capture pointer callback,
 * ptr = current byte pointer
 */
static inline snd_pcm_uframes_t
snd_pcm_indirect_capture_pointer(struct snd_pcm_substream *substream,
				 struct snd_pcm_indirect *rec, unsigned int ptr)
{ … }

#endif /* __SOUND_PCM_INDIRECT_H */