linux/sound/core/oss/pcm_plugin.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __PCM_PLUGIN_H
#define __PCM_PLUGIN_H

/*
 *  Digital Audio (Plugin interface) abstract layer
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 */

#ifdef CONFIG_SND_PCM_OSS_PLUGINS

#define snd_pcm_plug_stream(plug) …

enum snd_pcm_plugin_action { … };

struct snd_pcm_channel_area { … };

struct snd_pcm_plugin_channel { … };

struct snd_pcm_plugin_format { … };

struct snd_pcm_plugin { … };

int snd_pcm_plugin_build(struct snd_pcm_substream *handle,
                         const char *name,
                         struct snd_pcm_plugin_format *src_format,
                         struct snd_pcm_plugin_format *dst_format,
                         size_t extra,
                         struct snd_pcm_plugin **ret);
int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin);
int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size);
snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size);

#define FULL …
#define HALF …

int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,
			    struct snd_pcm_hw_params *params,
			    struct snd_pcm_plugin **r_plugin);
int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle,
				struct snd_pcm_plugin_format *src_format,
				struct snd_pcm_plugin_format *dst_format,
				struct snd_pcm_plugin **r_plugin);
int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle,
			       struct snd_pcm_plugin_format *src_format,
			       struct snd_pcm_plugin_format *dst_format,
			       struct snd_pcm_plugin **r_plugin);
int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,
			      struct snd_pcm_plugin_format *src_format,
			      struct snd_pcm_plugin_format *dst_format,
			      struct snd_pcm_plugin **r_plugin);
int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,
			       struct snd_pcm_plugin_format *src_format,
			       struct snd_pcm_plugin_format *dst_format,
		               struct snd_pcm_plugin **r_plugin);
int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,
			      struct snd_pcm_plugin_format *src_format,
			      struct snd_pcm_plugin_format *dst_format,
			      struct snd_pcm_plugin **r_plugin);

int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_pcm_hw_params *slave_params);

snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format,
					   const struct snd_mask *format_mask);

int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin);

snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle,
					      struct snd_pcm_plugin_channel *src_channels,
					      snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle,
					     struct snd_pcm_plugin_channel *dst_channels_final,
					     snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle,
						   char *buf, snd_pcm_uframes_t count,
						   struct snd_pcm_plugin_channel **channels);

snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,
						 snd_pcm_uframes_t frames,
						 struct snd_pcm_plugin_channel **channels);

int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel,
			 size_t dst_offset,
			 size_t samples, snd_pcm_format_t format);
int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel,
		      size_t src_offset,
		      const struct snd_pcm_channel_area *dst_channel,
		      size_t dst_offset,
		      size_t samples, snd_pcm_format_t format);

#else

static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }
static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; }
static inline int snd_pcm_plug_slave_format(int format, const struct snd_mask *format_mask) { return format; }

#endif

snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,
				     const char *ptr, snd_pcm_uframes_t size,
				     int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,
				    char *ptr, snd_pcm_uframes_t size, int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,
				      void **bufs, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,
				     void **bufs, snd_pcm_uframes_t frames);

#ifdef PLUGIN_DEBUG
#define pdprintf …
#else
#define pdprintf(fmt, args...) …
#endif

#endif				/* __PCM_PLUGIN_H */