diff options
Diffstat (limited to 'sound/core/oss/pcm_plugin.h')
-rw-r--r-- | sound/core/oss/pcm_plugin.h | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/sound/core/oss/pcm_plugin.h b/sound/core/oss/pcm_plugin.h new file mode 100644 index 00000000000..0f86ce47749 --- /dev/null +++ b/sound/core/oss/pcm_plugin.h @@ -0,0 +1,250 @@ +#ifndef __PCM_PLUGIN_H +#define __PCM_PLUGIN_H + +/* + * Digital Audio (Plugin interface) abstract layer + * Copyright (c) by Jaroslav Kysela <perex@suse.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 + * + */ + +#ifndef ATTRIBUTE_UNUSED +#define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +#endif + +typedef unsigned int bitset_t; + +static inline size_t bitset_size(int nbits) +{ + return (nbits + sizeof(bitset_t) * 8 - 1) / (sizeof(bitset_t) * 8); +} + +static inline bitset_t *bitset_alloc(int nbits) +{ + return kcalloc(bitset_size(nbits), sizeof(bitset_t), GFP_KERNEL); +} + +static inline void bitset_set(bitset_t *bitmap, unsigned int pos) +{ + size_t bits = sizeof(*bitmap) * 8; + bitmap[pos / bits] |= 1 << (pos % bits); +} + +static inline void bitset_reset(bitset_t *bitmap, unsigned int pos) +{ + size_t bits = sizeof(*bitmap) * 8; + bitmap[pos / bits] &= ~(1 << (pos % bits)); +} + +static inline int bitset_get(bitset_t *bitmap, unsigned int pos) +{ + size_t bits = sizeof(*bitmap) * 8; + return !!(bitmap[pos / bits] & (1 << (pos % bits))); +} + +static inline void bitset_copy(bitset_t *dst, bitset_t *src, unsigned int nbits) +{ + memcpy(dst, src, bitset_size(nbits) * sizeof(bitset_t)); +} + +static inline void bitset_and(bitset_t *dst, bitset_t *bs, unsigned int nbits) +{ + bitset_t *end = dst + bitset_size(nbits); + while (dst < end) + *dst++ &= *bs++; +} + +static inline void bitset_or(bitset_t *dst, bitset_t *bs, unsigned int nbits) +{ + bitset_t *end = dst + bitset_size(nbits); + while (dst < end) + *dst++ |= *bs++; +} + +static inline void bitset_zero(bitset_t *dst, unsigned int nbits) +{ + bitset_t *end = dst + bitset_size(nbits); + while (dst < end) + *dst++ = 0; +} + +static inline void bitset_one(bitset_t *dst, unsigned int nbits) +{ + bitset_t *end = dst + bitset_size(nbits); + while (dst < end) + *dst++ = ~(bitset_t)0; +} + +#define snd_pcm_plug_t snd_pcm_substream_t +#define snd_pcm_plug_stream(plug) ((plug)->stream) + +typedef enum { + INIT = 0, + PREPARE = 1, +} snd_pcm_plugin_action_t; + +typedef 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 */ +} snd_pcm_channel_area_t; + +typedef struct _snd_pcm_plugin_channel { + void *aptr; /* pointer to the allocated area */ + snd_pcm_channel_area_t area; + snd_pcm_uframes_t frames; /* allocated frames */ + unsigned int enabled:1; /* channel need to be processed */ + unsigned int wanted:1; /* channel is wanted */ +} snd_pcm_plugin_channel_t; + +typedef struct _snd_pcm_plugin_format { + int format; + unsigned int rate; + unsigned int channels; +} snd_pcm_plugin_format_t; + +struct _snd_pcm_plugin { + const char *name; /* plug-in name */ + int stream; + snd_pcm_plugin_format_t src_format; /* source format */ + snd_pcm_plugin_format_t dst_format; /* destination format */ + int src_width; /* sample width in bits */ + int dst_width; /* sample width in bits */ + int access; + snd_pcm_sframes_t (*src_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t dst_frames); + snd_pcm_sframes_t (*dst_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t src_frames); + snd_pcm_sframes_t (*client_channels)(snd_pcm_plugin_t *plugin, + snd_pcm_uframes_t frames, + snd_pcm_plugin_channel_t **channels); + int (*src_channels_mask)(snd_pcm_plugin_t *plugin, + bitset_t *dst_vmask, + bitset_t **src_vmask); + int (*dst_channels_mask)(snd_pcm_plugin_t *plugin, + bitset_t *src_vmask, + bitset_t **dst_vmask); + snd_pcm_sframes_t (*transfer)(snd_pcm_plugin_t *plugin, + const snd_pcm_plugin_channel_t *src_channels, + snd_pcm_plugin_channel_t *dst_channels, + snd_pcm_uframes_t frames); + int (*action)(snd_pcm_plugin_t *plugin, + snd_pcm_plugin_action_t action, + unsigned long data); + snd_pcm_plugin_t *prev; + snd_pcm_plugin_t *next; + snd_pcm_plug_t *plug; + void *private_data; + void (*private_free)(snd_pcm_plugin_t *plugin); + char *buf; + snd_pcm_uframes_t buf_frames; + snd_pcm_plugin_channel_t *buf_channels; + bitset_t *src_vmask; + bitset_t *dst_vmask; + char extra_data[0]; +}; + +int snd_pcm_plugin_build(snd_pcm_plug_t *handle, + const char *name, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + size_t extra, + snd_pcm_plugin_t **ret); +int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin); +int snd_pcm_plugin_clear(snd_pcm_plugin_t **first); +int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t frames); +snd_pcm_sframes_t snd_pcm_plug_client_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t drv_size); +snd_pcm_sframes_t snd_pcm_plug_slave_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t clt_size); + +#define FULL ROUTE_PLUGIN_RESOLUTION +#define HALF ROUTE_PLUGIN_RESOLUTION / 2 +typedef int route_ttable_entry_t; + +int snd_pcm_plugin_build_io(snd_pcm_plug_t *handle, + snd_pcm_hw_params_t *params, + snd_pcm_plugin_t **r_plugin); +int snd_pcm_plugin_build_linear(snd_pcm_plug_t *handle, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + snd_pcm_plugin_t **r_plugin); +int snd_pcm_plugin_build_mulaw(snd_pcm_plug_t *handle, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + snd_pcm_plugin_t **r_plugin); +int snd_pcm_plugin_build_rate(snd_pcm_plug_t *handle, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + snd_pcm_plugin_t **r_plugin); +int snd_pcm_plugin_build_route(snd_pcm_plug_t *handle, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + route_ttable_entry_t *ttable, + snd_pcm_plugin_t **r_plugin); +int snd_pcm_plugin_build_copy(snd_pcm_plug_t *handle, + snd_pcm_plugin_format_t *src_format, + snd_pcm_plugin_format_t *dst_format, + snd_pcm_plugin_t **r_plugin); + +int snd_pcm_plug_format_plugins(snd_pcm_plug_t *substream, + snd_pcm_hw_params_t *params, + snd_pcm_hw_params_t *slave_params); + +int snd_pcm_plug_slave_format(int format, snd_mask_t *format_mask); + +int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin); + +snd_pcm_sframes_t snd_pcm_plug_write_transfer(snd_pcm_plug_t *handle, snd_pcm_plugin_channel_t *src_channels, snd_pcm_uframes_t size); +snd_pcm_sframes_t snd_pcm_plug_read_transfer(snd_pcm_plug_t *handle, snd_pcm_plugin_channel_t *dst_channels_final, snd_pcm_uframes_t size); + +snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *handle, + char *buf, snd_pcm_uframes_t count, + snd_pcm_plugin_channel_t **channels); + +snd_pcm_sframes_t snd_pcm_plugin_client_channels(snd_pcm_plugin_t *plugin, + snd_pcm_uframes_t frames, + snd_pcm_plugin_channel_t **channels); + +int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, size_t dst_offset, + size_t samples, int format); +int snd_pcm_area_copy(const snd_pcm_channel_area_t *src_channel, size_t src_offset, + const snd_pcm_channel_area_t *dst_channel, size_t dst_offset, + size_t samples, int format); + +void *snd_pcm_plug_buf_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t size); +void snd_pcm_plug_buf_unlock(snd_pcm_plug_t *plug, void *ptr); +snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t size, int in_kernel); +snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t size, int in_kernel); +snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel); +snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel); + + + +#define ROUTE_PLUGIN_RESOLUTION 16 + +int getput_index(int format); +int copy_index(int format); +int conv_index(int src_format, int dst_format); + +void zero_channel(snd_pcm_plugin_t *plugin, + const snd_pcm_plugin_channel_t *dst_channel, + size_t samples); + +#ifdef PLUGIN_DEBUG +#define pdprintf( fmt, args... ) printk( "plugin: " fmt, ##args) +#else +#define pdprintf( fmt, args... ) +#endif + +#endif /* __PCM_PLUGIN_H */ |