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168 lines
6.7 KiB
168 lines
6.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef __PCM_PLUGIN_H |
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#define __PCM_PLUGIN_H |
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/* |
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* Digital Audio (Plugin interface) abstract layer |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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*/ |
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#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
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#define snd_pcm_plug_stream(plug) ((plug)->stream) |
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enum snd_pcm_plugin_action { |
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INIT = 0, |
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PREPARE = 1, |
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}; |
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struct snd_pcm_channel_area { |
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void *addr; /* base address of channel samples */ |
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unsigned int first; /* offset to first sample in bits */ |
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unsigned int step; /* samples distance in bits */ |
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}; |
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struct snd_pcm_plugin_channel { |
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void *aptr; /* pointer to the allocated area */ |
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struct snd_pcm_channel_area area; |
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snd_pcm_uframes_t frames; /* allocated frames */ |
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unsigned int enabled:1; /* channel need to be processed */ |
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unsigned int wanted:1; /* channel is wanted */ |
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}; |
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struct snd_pcm_plugin_format { |
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snd_pcm_format_t format; |
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unsigned int rate; |
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unsigned int channels; |
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}; |
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struct snd_pcm_plugin { |
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const char *name; /* plug-in name */ |
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int stream; |
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struct snd_pcm_plugin_format src_format; /* source format */ |
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struct snd_pcm_plugin_format dst_format; /* destination format */ |
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int src_width; /* sample width in bits */ |
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int dst_width; /* sample width in bits */ |
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snd_pcm_access_t access; |
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snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames); |
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snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames); |
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snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin, |
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snd_pcm_uframes_t frames, |
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struct snd_pcm_plugin_channel **channels); |
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snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin, |
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const struct snd_pcm_plugin_channel *src_channels, |
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struct snd_pcm_plugin_channel *dst_channels, |
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snd_pcm_uframes_t frames); |
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int (*action)(struct snd_pcm_plugin *plugin, |
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enum snd_pcm_plugin_action action, |
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unsigned long data); |
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struct snd_pcm_plugin *prev; |
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struct snd_pcm_plugin *next; |
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struct snd_pcm_substream *plug; |
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void *private_data; |
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void (*private_free)(struct snd_pcm_plugin *plugin); |
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char *buf; |
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snd_pcm_uframes_t buf_frames; |
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struct snd_pcm_plugin_channel *buf_channels; |
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char extra_data[]; |
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}; |
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int snd_pcm_plugin_build(struct snd_pcm_substream *handle, |
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const char *name, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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size_t extra, |
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struct snd_pcm_plugin **ret); |
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int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin); |
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int snd_pcm_plugin_clear(struct snd_pcm_plugin **first); |
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int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames); |
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snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size); |
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snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size); |
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#define FULL ROUTE_PLUGIN_RESOLUTION |
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#define HALF ROUTE_PLUGIN_RESOLUTION / 2 |
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int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle, |
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struct snd_pcm_hw_params *params, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_format *src_format, |
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struct snd_pcm_plugin_format *dst_format, |
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struct snd_pcm_plugin **r_plugin); |
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int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_pcm_hw_params *slave_params); |
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snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, |
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const struct snd_mask *format_mask); |
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int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin); |
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snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_channel *src_channels, |
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snd_pcm_uframes_t size); |
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snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle, |
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struct snd_pcm_plugin_channel *dst_channels_final, |
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snd_pcm_uframes_t size); |
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snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle, |
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char *buf, snd_pcm_uframes_t count, |
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struct snd_pcm_plugin_channel **channels); |
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snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
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snd_pcm_uframes_t frames, |
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struct snd_pcm_plugin_channel **channels); |
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int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel, |
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size_t dst_offset, |
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size_t samples, snd_pcm_format_t format); |
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int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel, |
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size_t src_offset, |
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const struct snd_pcm_channel_area *dst_channel, |
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size_t dst_offset, |
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size_t samples, snd_pcm_format_t format); |
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void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size); |
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void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr); |
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snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, |
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const char *ptr, snd_pcm_uframes_t size, |
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int in_kernel); |
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snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, |
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char *ptr, snd_pcm_uframes_t size, int in_kernel); |
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snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, |
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void **bufs, snd_pcm_uframes_t frames); |
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snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, |
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void **bufs, snd_pcm_uframes_t frames); |
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#else |
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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; } |
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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; } |
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static inline int snd_pcm_plug_slave_format(int format, const struct snd_mask *format_mask) { return format; } |
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#endif |
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#ifdef PLUGIN_DEBUG |
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#define pdprintf(fmt, args...) printk(KERN_DEBUG "plugin: " fmt, ##args) |
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#else |
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#define pdprintf(fmt, args...) |
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#endif |
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#endif /* __PCM_PLUGIN_H */
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