| /* 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 <perex@perex.cz> |
| */ |
| |
| #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
| |
| #define snd_pcm_plug_stream(plug) ((plug)->stream) |
| |
| enum snd_pcm_plugin_action { |
| INIT = 0, |
| PREPARE = 1, |
| }; |
| |
| struct snd_pcm_channel_area { |
| void *addr; /* base address of channel samples */ |
| unsigned int first; /* offset to first sample in bits */ |
| unsigned int step; /* samples distance in bits */ |
| }; |
| |
| struct snd_pcm_plugin_channel { |
| void *aptr; /* pointer to the allocated area */ |
| struct snd_pcm_channel_area area; |
| snd_pcm_uframes_t frames; /* allocated frames */ |
| unsigned int enabled:1; /* channel need to be processed */ |
| unsigned int wanted:1; /* channel is wanted */ |
| }; |
| |
| struct snd_pcm_plugin_format { |
| snd_pcm_format_t format; |
| unsigned int rate; |
| unsigned int channels; |
| }; |
| |
| struct snd_pcm_plugin { |
| const char *name; /* plug-in name */ |
| int stream; |
| struct snd_pcm_plugin_format src_format; /* source format */ |
| struct snd_pcm_plugin_format dst_format; /* destination format */ |
| int src_width; /* sample width in bits */ |
| int dst_width; /* sample width in bits */ |
| snd_pcm_access_t access; |
| snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames); |
| snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames); |
| snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin, |
| snd_pcm_uframes_t frames, |
| struct snd_pcm_plugin_channel **channels); |
| snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin, |
| const struct snd_pcm_plugin_channel *src_channels, |
| struct snd_pcm_plugin_channel *dst_channels, |
| snd_pcm_uframes_t frames); |
| int (*action)(struct snd_pcm_plugin *plugin, |
| enum snd_pcm_plugin_action action, |
| unsigned long data); |
| struct snd_pcm_plugin *prev; |
| struct snd_pcm_plugin *next; |
| struct snd_pcm_substream *plug; |
| void *private_data; |
| void (*private_free)(struct snd_pcm_plugin *plugin); |
| char *buf; |
| snd_pcm_uframes_t buf_frames; |
| struct snd_pcm_plugin_channel *buf_channels; |
| char extra_data[0]; |
| }; |
| |
| 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_plugin_clear(struct snd_pcm_plugin **first); |
| 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 ROUTE_PLUGIN_RESOLUTION |
| #define HALF ROUTE_PLUGIN_RESOLUTION / 2 |
| |
| 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); |
| |
| void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size); |
| void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr); |
| 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); |
| |
| #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 |
| |
| #ifdef PLUGIN_DEBUG |
| #define pdprintf(fmt, args...) printk(KERN_DEBUG "plugin: " fmt, ##args) |
| #else |
| #define pdprintf(fmt, args...) |
| #endif |
| |
| #endif /* __PCM_PLUGIN_H */ |