#ifndef __PCM_PLUGIN_H #define __PCM_PLUGIN_H /* * Digital Audio (Plugin interface) abstract layer * Copyright (c) by Jaroslav Kysela * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #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, 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, int in_kernel); snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel); #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, 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 */