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1/* SPDX-License-Identifier: GPL-2.0-or-later */2#ifndef __PCM_PLUGIN_H3#define __PCM_PLUGIN_H4 5/*6 * Digital Audio (Plugin interface) abstract layer7 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>8 */9 10#ifdef CONFIG_SND_PCM_OSS_PLUGINS11 12#define snd_pcm_plug_stream(plug) ((plug)->stream)13 14enum snd_pcm_plugin_action {15 INIT = 0,16 PREPARE = 1,17};18 19struct snd_pcm_channel_area {20 void *addr; /* base address of channel samples */21 unsigned int first; /* offset to first sample in bits */22 unsigned int step; /* samples distance in bits */23};24 25struct snd_pcm_plugin_channel {26 void *aptr; /* pointer to the allocated area */27 struct snd_pcm_channel_area area;28 snd_pcm_uframes_t frames; /* allocated frames */29 unsigned int enabled:1; /* channel need to be processed */30 unsigned int wanted:1; /* channel is wanted */31};32 33struct snd_pcm_plugin_format {34 snd_pcm_format_t format;35 unsigned int rate;36 unsigned int channels;37};38 39struct snd_pcm_plugin {40 const char *name; /* plug-in name */41 int stream;42 struct snd_pcm_plugin_format src_format; /* source format */43 struct snd_pcm_plugin_format dst_format; /* destination format */44 int src_width; /* sample width in bits */45 int dst_width; /* sample width in bits */46 snd_pcm_access_t access;47 snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames);48 snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames);49 snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin,50 snd_pcm_uframes_t frames,51 struct snd_pcm_plugin_channel **channels);52 snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin,53 const struct snd_pcm_plugin_channel *src_channels,54 struct snd_pcm_plugin_channel *dst_channels,55 snd_pcm_uframes_t frames);56 int (*action)(struct snd_pcm_plugin *plugin,57 enum snd_pcm_plugin_action action,58 unsigned long data);59 struct snd_pcm_plugin *prev;60 struct snd_pcm_plugin *next;61 struct snd_pcm_substream *plug;62 void *private_data;63 void (*private_free)(struct snd_pcm_plugin *plugin);64 char *buf;65 snd_pcm_uframes_t buf_frames;66 struct snd_pcm_plugin_channel *buf_channels;67 char extra_data[];68};69 70int snd_pcm_plugin_build(struct snd_pcm_substream *handle,71 const char *name,72 struct snd_pcm_plugin_format *src_format,73 struct snd_pcm_plugin_format *dst_format,74 size_t extra,75 struct snd_pcm_plugin **ret);76int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin);77int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames);78snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size);79snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size);80 81#define FULL ROUTE_PLUGIN_RESOLUTION82#define HALF ROUTE_PLUGIN_RESOLUTION / 283 84int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,85 struct snd_pcm_hw_params *params,86 struct snd_pcm_plugin **r_plugin);87int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle,88 struct snd_pcm_plugin_format *src_format,89 struct snd_pcm_plugin_format *dst_format,90 struct snd_pcm_plugin **r_plugin);91int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle,92 struct snd_pcm_plugin_format *src_format,93 struct snd_pcm_plugin_format *dst_format,94 struct snd_pcm_plugin **r_plugin);95int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,96 struct snd_pcm_plugin_format *src_format,97 struct snd_pcm_plugin_format *dst_format,98 struct snd_pcm_plugin **r_plugin);99int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,100 struct snd_pcm_plugin_format *src_format,101 struct snd_pcm_plugin_format *dst_format,102 struct snd_pcm_plugin **r_plugin);103int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,104 struct snd_pcm_plugin_format *src_format,105 struct snd_pcm_plugin_format *dst_format,106 struct snd_pcm_plugin **r_plugin);107 108int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream,109 struct snd_pcm_hw_params *params,110 struct snd_pcm_hw_params *slave_params);111 112snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format,113 const struct snd_mask *format_mask);114 115int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin);116 117snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle,118 struct snd_pcm_plugin_channel *src_channels,119 snd_pcm_uframes_t size);120snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle,121 struct snd_pcm_plugin_channel *dst_channels_final,122 snd_pcm_uframes_t size);123 124snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle,125 char *buf, snd_pcm_uframes_t count,126 struct snd_pcm_plugin_channel **channels);127 128snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,129 snd_pcm_uframes_t frames,130 struct snd_pcm_plugin_channel **channels);131 132int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel,133 size_t dst_offset,134 size_t samples, snd_pcm_format_t format);135int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel,136 size_t src_offset,137 const struct snd_pcm_channel_area *dst_channel,138 size_t dst_offset,139 size_t samples, snd_pcm_format_t format);140 141#else142 143static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }144static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; }145static inline int snd_pcm_plug_slave_format(int format, const struct snd_mask *format_mask) { return format; }146 147#endif148 149snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,150 const char *ptr, snd_pcm_uframes_t size,151 int in_kernel);152snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,153 char *ptr, snd_pcm_uframes_t size, int in_kernel);154snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,155 void **bufs, snd_pcm_uframes_t frames);156snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,157 void **bufs, snd_pcm_uframes_t frames);158 159#ifdef PLUGIN_DEBUG160#define pdprintf(fmt, args...) pr_debug("plugin: " fmt, ##args)161#else162#define pdprintf(fmt, args...)163#endif164 165#endif /* __PCM_PLUGIN_H */166