251 lines
8.7 KiB
C
251 lines
8.7 KiB
C
#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 <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef ATTRIBUTE_UNUSED
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#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
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#endif
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typedef unsigned int bitset_t;
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static inline size_t bitset_size(int nbits)
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{
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return (nbits + sizeof(bitset_t) * 8 - 1) / (sizeof(bitset_t) * 8);
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}
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static inline bitset_t *bitset_alloc(int nbits)
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{
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return kcalloc(bitset_size(nbits), sizeof(bitset_t), GFP_KERNEL);
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}
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static inline void bitset_set(bitset_t *bitmap, unsigned int pos)
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{
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size_t bits = sizeof(*bitmap) * 8;
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bitmap[pos / bits] |= 1 << (pos % bits);
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}
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static inline void bitset_reset(bitset_t *bitmap, unsigned int pos)
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{
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size_t bits = sizeof(*bitmap) * 8;
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bitmap[pos / bits] &= ~(1 << (pos % bits));
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}
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static inline int bitset_get(bitset_t *bitmap, unsigned int pos)
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{
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size_t bits = sizeof(*bitmap) * 8;
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return !!(bitmap[pos / bits] & (1 << (pos % bits)));
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}
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static inline void bitset_copy(bitset_t *dst, bitset_t *src, unsigned int nbits)
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{
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memcpy(dst, src, bitset_size(nbits) * sizeof(bitset_t));
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}
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static inline void bitset_and(bitset_t *dst, bitset_t *bs, unsigned int nbits)
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{
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bitset_t *end = dst + bitset_size(nbits);
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while (dst < end)
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*dst++ &= *bs++;
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}
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static inline void bitset_or(bitset_t *dst, bitset_t *bs, unsigned int nbits)
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{
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bitset_t *end = dst + bitset_size(nbits);
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while (dst < end)
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*dst++ |= *bs++;
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}
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static inline void bitset_zero(bitset_t *dst, unsigned int nbits)
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{
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bitset_t *end = dst + bitset_size(nbits);
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while (dst < end)
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*dst++ = 0;
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}
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static inline void bitset_one(bitset_t *dst, unsigned int nbits)
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{
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bitset_t *end = dst + bitset_size(nbits);
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while (dst < end)
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*dst++ = ~(bitset_t)0;
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}
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#define snd_pcm_plug_t snd_pcm_substream_t
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#define snd_pcm_plug_stream(plug) ((plug)->stream)
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typedef enum {
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INIT = 0,
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PREPARE = 1,
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} snd_pcm_plugin_action_t;
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typedef 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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} snd_pcm_channel_area_t;
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typedef struct _snd_pcm_plugin_channel {
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void *aptr; /* pointer to the allocated area */
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snd_pcm_channel_area_t 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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} snd_pcm_plugin_channel_t;
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typedef struct _snd_pcm_plugin_format {
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int format;
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unsigned int rate;
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unsigned int channels;
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} snd_pcm_plugin_format_t;
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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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snd_pcm_plugin_format_t src_format; /* source format */
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snd_pcm_plugin_format_t 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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int access;
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snd_pcm_sframes_t (*src_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t dst_frames);
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snd_pcm_sframes_t (*dst_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t src_frames);
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snd_pcm_sframes_t (*client_channels)(snd_pcm_plugin_t *plugin,
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snd_pcm_uframes_t frames,
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snd_pcm_plugin_channel_t **channels);
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int (*src_channels_mask)(snd_pcm_plugin_t *plugin,
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bitset_t *dst_vmask,
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bitset_t **src_vmask);
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int (*dst_channels_mask)(snd_pcm_plugin_t *plugin,
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bitset_t *src_vmask,
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bitset_t **dst_vmask);
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snd_pcm_sframes_t (*transfer)(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *src_channels,
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snd_pcm_plugin_channel_t *dst_channels,
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snd_pcm_uframes_t frames);
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int (*action)(snd_pcm_plugin_t *plugin,
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snd_pcm_plugin_action_t action,
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unsigned long data);
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snd_pcm_plugin_t *prev;
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snd_pcm_plugin_t *next;
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snd_pcm_plug_t *plug;
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void *private_data;
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void (*private_free)(snd_pcm_plugin_t *plugin);
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char *buf;
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snd_pcm_uframes_t buf_frames;
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snd_pcm_plugin_channel_t *buf_channels;
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bitset_t *src_vmask;
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bitset_t *dst_vmask;
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char extra_data[0];
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};
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int snd_pcm_plugin_build(snd_pcm_plug_t *handle,
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const char *name,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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size_t extra,
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snd_pcm_plugin_t **ret);
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int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin);
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int snd_pcm_plugin_clear(snd_pcm_plugin_t **first);
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int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t frames);
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snd_pcm_sframes_t snd_pcm_plug_client_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t drv_size);
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snd_pcm_sframes_t snd_pcm_plug_slave_size(snd_pcm_plug_t *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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typedef int route_ttable_entry_t;
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int snd_pcm_plugin_build_io(snd_pcm_plug_t *handle,
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snd_pcm_hw_params_t *params,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plugin_build_linear(snd_pcm_plug_t *handle,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plugin_build_mulaw(snd_pcm_plug_t *handle,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plugin_build_rate(snd_pcm_plug_t *handle,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plugin_build_route(snd_pcm_plug_t *handle,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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route_ttable_entry_t *ttable,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plugin_build_copy(snd_pcm_plug_t *handle,
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snd_pcm_plugin_format_t *src_format,
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snd_pcm_plugin_format_t *dst_format,
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snd_pcm_plugin_t **r_plugin);
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int snd_pcm_plug_format_plugins(snd_pcm_plug_t *substream,
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snd_pcm_hw_params_t *params,
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snd_pcm_hw_params_t *slave_params);
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int snd_pcm_plug_slave_format(int format, snd_mask_t *format_mask);
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int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin);
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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);
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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);
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snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *handle,
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char *buf, snd_pcm_uframes_t count,
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snd_pcm_plugin_channel_t **channels);
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snd_pcm_sframes_t snd_pcm_plugin_client_channels(snd_pcm_plugin_t *plugin,
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snd_pcm_uframes_t frames,
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snd_pcm_plugin_channel_t **channels);
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int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
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size_t samples, int format);
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int snd_pcm_area_copy(const snd_pcm_channel_area_t *src_channel, size_t src_offset,
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const snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
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size_t samples, int format);
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void *snd_pcm_plug_buf_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t size);
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void snd_pcm_plug_buf_unlock(snd_pcm_plug_t *plug, void *ptr);
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snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t size, int in_kernel);
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snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t size, int in_kernel);
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snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel);
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snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel);
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#define ROUTE_PLUGIN_RESOLUTION 16
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int getput_index(int format);
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int copy_index(int format);
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int conv_index(int src_format, int dst_format);
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void zero_channel(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *dst_channel,
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size_t samples);
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#ifdef PLUGIN_DEBUG
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#define pdprintf( fmt, args... ) printk( "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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