diff options
Diffstat (limited to 'sound/core/oss/pcm_plugin.h')
| -rw-r--r-- | sound/core/oss/pcm_plugin.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/sound/core/oss/pcm_plugin.h b/sound/core/oss/pcm_plugin.h new file mode 100644 index 000000000..c9cd29d86 --- /dev/null +++ b/sound/core/oss/pcm_plugin.h @@ -0,0 +1,183 @@ +#ifndef __PCM_PLUGIN_H +#define __PCM_PLUGIN_H + +/* + * Digital Audio (Plugin interface) abstract layer + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * + * 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, + 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 */ |