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alsa-lib/src/pcm/pcm_common.c
Abramo Bagnara 2d0d687591 private_free fixes
2000-08-16 16:05:57 +00:00

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/*
* PCM Plug-In shared (kernel/library) code
* Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#if 0
#define PLUGIN_DEBUG
#endif
#ifdef __KERNEL__
#include "../../include/driver.h"
#include "../../include/pcm.h"
#define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first)
#define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last)
#define __vmalloc snd_vmalloc
#define __vfree snd_vfree
#else
#include <malloc.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/uio.h>
#include "pcm_local.h"
#define snd_pcm_plug_first(plug) ((plug)->first)
#define snd_pcm_plug_last(plug) ((plug)->last)
#define __vmalloc malloc
#define __vfree free
#endif
static int snd_pcm_plugin_src_channels_mask(snd_pcm_plugin_t *plugin,
bitset_t *dst_vmask,
bitset_t **src_vmask)
{
bitset_t *vmask = plugin->src_vmask;
bitset_copy(vmask, dst_vmask, plugin->src_format.channels);
*src_vmask = vmask;
return 0;
}
static int snd_pcm_plugin_dst_channels_mask(snd_pcm_plugin_t *plugin,
bitset_t *src_vmask,
bitset_t **dst_vmask)
{
bitset_t *vmask = plugin->dst_vmask;
bitset_copy(vmask, src_vmask, plugin->dst_format.channels);
*dst_vmask = vmask;
return 0;
}
static int snd_pcm_plugin_alloc(snd_pcm_plugin_t *plugin, size_t frames)
{
snd_pcm_format_t *format;
ssize_t width;
size_t size;
unsigned int channel;
snd_pcm_plugin_channel_t *c;
if (plugin->stream == SND_PCM_STREAM_PLAYBACK)
format = &plugin->src_format;
else
format = &plugin->dst_format;
if ((width = snd_pcm_format_physical_width(format->format)) < 0)
return width;
size = frames * format->channels * width;
assert(size % 8 == 0);
size /= 8;
if (plugin->buf_frames < frames) {
if (plugin->buf)
__vfree(plugin->buf);
plugin->buf = __vmalloc(size);
plugin->buf_frames = frames;
}
if (!plugin->buf)
return -ENOMEM;
c = plugin->buf_channels;
if (format->interleave) {
for (channel = 0; channel < format->channels; channel++, c++) {
c->enabled = 1;
c->wanted = 0;
c->area.addr = plugin->buf;
c->area.first = channel * width;
c->area.step = format->channels * width;
}
} else {
assert(size % format->channels == 0);
size /= format->channels;
for (channel = 0; channel < format->channels; channel++, c++) {
c->enabled = 1;
c->wanted = 0;
c->area.addr = plugin->buf + (channel * size);
c->area.first = 0;
c->area.step = width;
}
}
return 0;
}
int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, size_t frames)
{
int err;
#ifndef __KERNEL__
plug->frames_alloc = frames;
#endif
assert(snd_pcm_plug_first(plug));
if (snd_pcm_plug_stream(plug) == SND_PCM_STREAM_PLAYBACK) {
snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
while (plugin->next) {
if (plugin->dst_frames)
frames = plugin->dst_frames(plugin, frames);
assert(frames > 0);
plugin = plugin->next;
err = snd_pcm_plugin_alloc(plugin, frames);
if (err < 0)
return err;
}
} else {
snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
while (plugin->prev) {
if (plugin->src_frames)
frames = plugin->src_frames(plugin, frames);
assert(frames > 0);
plugin = plugin->prev;
err = snd_pcm_plugin_alloc(plugin, frames);
if (err < 0)
return err;
}
}
return 0;
}
ssize_t snd_pcm_plugin_client_channels(snd_pcm_plugin_t *plugin,
size_t frames,
snd_pcm_plugin_channel_t **channels)
{
assert(frames <= plugin->buf_frames);
*channels = plugin->buf_channels;
return frames;
}
int snd_pcm_plugin_build(snd_pcm_plug_t *plug,
const char *name,
snd_pcm_format_t *src_format,
snd_pcm_format_t *dst_format,
size_t extra,
snd_pcm_plugin_t **ret)
{
snd_pcm_plugin_t *plugin;
size_t channels;
assert(plug);
assert(src_format && dst_format);
plugin = (snd_pcm_plugin_t *)calloc(1, sizeof(*plugin) + extra);
if (plugin == NULL)
return -ENOMEM;
plugin->name = name ? strdup(name) : NULL;
plugin->plug = plug;
plugin->stream = snd_pcm_plug_stream(plug);
plugin->src_format = *src_format;
plugin->src_width = snd_pcm_format_physical_width(src_format->format);
assert(plugin->src_width > 0);
plugin->dst_format = *dst_format;
plugin->dst_width = snd_pcm_format_physical_width(dst_format->format);
assert(plugin->dst_width > 0);
if (plugin->stream == SND_PCM_STREAM_PLAYBACK)
channels = src_format->channels;
else
channels = dst_format->channels;
plugin->buf_channels = calloc(channels, sizeof(*plugin->buf_channels));
if (plugin->buf_channels == NULL) {
free(plugin);
return -ENOMEM;
}
plugin->src_vmask = bitset_alloc(src_format->channels);
if (plugin->src_vmask == NULL) {
free(plugin->buf_channels);
free(plugin);
return -ENOMEM;
}
plugin->dst_vmask = bitset_alloc(dst_format->channels);
if (plugin->dst_vmask == NULL) {
free(plugin->buf_channels);
free(plugin->src_vmask);
free(plugin);
return -ENOMEM;
}
plugin->client_channels = snd_pcm_plugin_client_channels;
plugin->src_channels_mask = snd_pcm_plugin_src_channels_mask;
plugin->dst_channels_mask = snd_pcm_plugin_dst_channels_mask;
*ret = plugin;
return 0;
}
int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin)
{
assert(plugin);
if (plugin->private_free)
plugin->private_free(plugin);
if (plugin->name)
free(plugin->name);
free(plugin->buf_channels);
if (plugin->buf)
__vfree(plugin->buf);
free(plugin->src_vmask);
free(plugin->dst_vmask);
free(plugin);
return 0;
}
ssize_t snd_pcm_plug_client_size(snd_pcm_plug_t *plug, size_t drv_frames)
{
snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
int stream = snd_pcm_plug_stream(plug);
assert(plug);
if (drv_frames == 0)
return 0;
if (stream == SND_PCM_STREAM_PLAYBACK) {
plugin = snd_pcm_plug_last(plug);
while (plugin && drv_frames > 0) {
plugin_prev = plugin->prev;
if (plugin->src_frames)
drv_frames = plugin->src_frames(plugin, drv_frames);
plugin = plugin_prev;
}
} else if (stream == SND_PCM_STREAM_CAPTURE) {
plugin = snd_pcm_plug_first(plug);
while (plugin && drv_frames > 0) {
plugin_next = plugin->next;
if (plugin->dst_frames)
drv_frames = plugin->dst_frames(plugin, drv_frames);
plugin = plugin_next;
}
} else
assert(0);
return drv_frames;
}
ssize_t snd_pcm_plug_slave_size(snd_pcm_plug_t *plug, size_t clt_frames)
{
snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
ssize_t frames;
int stream = snd_pcm_plug_stream(plug);
assert(plug);
if (clt_frames == 0)
return 0;
frames = clt_frames;
if (stream == SND_PCM_STREAM_PLAYBACK) {
plugin = snd_pcm_plug_first(plug);
while (plugin && frames > 0) {
plugin_next = plugin->next;
if (plugin->dst_frames) {
frames = plugin->dst_frames(plugin, frames);
if (frames < 0)
return frames;
}
plugin = plugin_next;
}
} else if (stream == SND_PCM_STREAM_CAPTURE) {
plugin = snd_pcm_plug_last(plug);
while (plugin) {
plugin_prev = plugin->prev;
if (plugin->src_frames) {
frames = plugin->src_frames(plugin, frames);
if (frames < 0)
return frames;
}
plugin = plugin_prev;
}
} else
assert(0);
return frames;
}
unsigned int snd_pcm_plug_formats(unsigned int formats)
{
int linfmts = (SND_PCM_FMT_U8 | SND_PCM_FMT_S8 |
SND_PCM_FMT_U16_LE | SND_PCM_FMT_S16_LE |
SND_PCM_FMT_U16_BE | SND_PCM_FMT_S16_BE |
SND_PCM_FMT_U24_LE | SND_PCM_FMT_S24_LE |
SND_PCM_FMT_U24_BE | SND_PCM_FMT_S24_BE |
SND_PCM_FMT_U32_LE | SND_PCM_FMT_S32_LE |
SND_PCM_FMT_U32_BE | SND_PCM_FMT_S32_BE);
formats |= SND_PCM_FMT_MU_LAW;
#ifndef __KERNEL__
formats |= SND_PCM_FMT_A_LAW | SND_PCM_FMT_IMA_ADPCM;
#endif
if (formats & linfmts)
formats |= linfmts;
return formats;
}
static int preferred_formats[] = {
SND_PCM_SFMT_S16_LE,
SND_PCM_SFMT_S16_BE,
SND_PCM_SFMT_U16_LE,
SND_PCM_SFMT_U16_BE,
SND_PCM_SFMT_S24_LE,
SND_PCM_SFMT_S24_BE,
SND_PCM_SFMT_U24_LE,
SND_PCM_SFMT_U24_BE,
SND_PCM_SFMT_S32_LE,
SND_PCM_SFMT_S32_BE,
SND_PCM_SFMT_U32_LE,
SND_PCM_SFMT_U32_BE,
SND_PCM_SFMT_S8,
SND_PCM_SFMT_U8
};
int snd_pcm_plug_slave_fmt(int format, snd_pcm_params_info_t *slave_info)
{
if ((snd_pcm_plug_formats(slave_info->formats) & (1 << format)) == 0)
return -EINVAL;
if (snd_pcm_format_linear(format)) {
int width = snd_pcm_format_width(format);
int unsignd = snd_pcm_format_unsigned(format);
int big = snd_pcm_format_big_endian(format);
int format1;
int wid, width1=width;
int dwidth1 = 8;
for (wid = 0; wid < 4; ++wid) {
int end, big1 = big;
for (end = 0; end < 2; ++end) {
int sgn, unsignd1 = unsignd;
for (sgn = 0; sgn < 2; ++sgn) {
format1 = snd_pcm_build_linear_format(width1, unsignd1, big1);
if (format1 >= 0 &&
slave_info->formats & (1 << format1))
goto _found;
unsignd1 = !unsignd1;
}
big1 = !big1;
}
if (width1 == 32) {
dwidth1 = -dwidth1;
width1 = width;
}
width1 += dwidth1;
}
return -EINVAL;
_found:
return format1;
} else {
unsigned int i;
switch (format) {
case SND_PCM_SFMT_MU_LAW:
#ifndef __KERNEL__
case SND_PCM_SFMT_A_LAW:
case SND_PCM_SFMT_IMA_ADPCM:
#endif
for (i = 0; i < sizeof(preferred_formats) / sizeof(preferred_formats[0]); ++i) {
int format1 = preferred_formats[i];
if (slave_info->formats & (1 << format1))
return format1;
}
default:
return -EINVAL;
}
}
}
struct {
unsigned int rate;
unsigned int flag;
} snd_pcm_rates[] = {
{ 8000, SND_PCM_RATE_8000 },
{ 11025, SND_PCM_RATE_11025 },
{ 16000, SND_PCM_RATE_16000 },
{ 22050, SND_PCM_RATE_22050 },
{ 32000, SND_PCM_RATE_32000 },
{ 44100, SND_PCM_RATE_44100 },
{ 48000, SND_PCM_RATE_48000 },
{ 88200, SND_PCM_RATE_88200 },
{ 96000, SND_PCM_RATE_96000 },
{ 176400, SND_PCM_RATE_176400 },
{ 192000, SND_PCM_RATE_192000 }
};
int snd_pcm_plug_slave_rate(unsigned int rate, snd_pcm_params_info_t *slave_info)
{
if (rate <= slave_info->min_rate)
return slave_info->min_rate;
else if (rate >= slave_info->max_rate)
return slave_info->max_rate;
else if (!(slave_info->rates & (SND_PCM_RATE_CONTINUOUS |
SND_PCM_RATE_KNOT))) {
unsigned int k;
unsigned int rate1 = 0, rate2 = 0;
int delta1, delta2;
for (k = 0; k < sizeof(snd_pcm_rates) /
sizeof(snd_pcm_rates[0]); ++k) {
if (!(snd_pcm_rates[k].flag & slave_info->rates))
continue;
if (snd_pcm_rates[k].rate < rate) {
rate1 = snd_pcm_rates[k].rate;
} else if (snd_pcm_rates[k].rate >= rate) {
rate2 = snd_pcm_rates[k].rate;
break;
}
}
if (rate1 == 0)
return rate2;
if (rate2 == 0)
return rate1;
delta1 = rate - rate1;
delta2 = rate2 - rate;
if (delta1 < delta2)
return rate1;
else
return rate2;
}
return rate;
}
int snd_pcm_plug_slave_format(snd_pcm_format_t *format,
snd_pcm_info_t *slave_info,
snd_pcm_params_info_t *slave_params_info,
snd_pcm_format_t *slave_format)
{
int slave_rate;
*slave_format = *format;
if ((slave_params_info->formats & (1 << format->format)) == 0) {
int slave_fmt = snd_pcm_plug_slave_fmt(format->format, slave_params_info);
if (slave_fmt < 0)
return slave_fmt;
slave_format->format = slave_fmt;
}
/* channels */
if (format->channels < slave_params_info->min_channels)
slave_format->channels = slave_params_info->min_channels;
else if (format->channels > slave_params_info->max_channels)
slave_format->channels = slave_params_info->max_channels;
/* rate */
slave_rate = snd_pcm_plug_slave_rate(format->rate, slave_params_info);
if (slave_rate < 0)
return slave_rate;
slave_format->rate = slave_rate;
/* interleave */
if (!(slave_info->flags & SND_PCM_INFO_INTERLEAVE))
slave_format->interleave = 0;
if (!(slave_info->flags & SND_PCM_INFO_NONINTERLEAVE))
slave_format->interleave = 1;
return 0;
}
int snd_pcm_plug_format_plugins(snd_pcm_plug_t *plug,
snd_pcm_format_t *format,
snd_pcm_format_t *slave_format)
{
snd_pcm_format_t tmpformat;
snd_pcm_format_t dstformat;
snd_pcm_format_t *srcformat;
snd_pcm_plugin_t *plugin;
int err;
switch (snd_pcm_plug_stream(plug)) {
case SND_PCM_STREAM_PLAYBACK:
dstformat = *slave_format;
srcformat = slave_format;
*srcformat = *format;
break;
case SND_PCM_STREAM_CAPTURE:
dstformat = *format;
srcformat = format;
*srcformat = *slave_format;
break;
default:
assert(0);
return -EINVAL;
}
tmpformat = *srcformat;
pdprintf("srcformat: interleave=%i, format=%i, rate=%i, channels=%i\n",
srcformat->interleave,
srcformat->format,
srcformat->rate,
srcformat->channels);
pdprintf("dstformat: interleave=%i, format=%i, rate=%i, channels=%i\n",
dstformat.interleave,
dstformat.format,
dstformat.rate,
dstformat.channels);
if (srcformat->channels == 1)
srcformat->interleave = dstformat.interleave;
/* Format change (linearization) */
if ((srcformat->format != dstformat.format ||
srcformat->rate != dstformat.rate ||
srcformat->channels != dstformat.channels) &&
!snd_pcm_format_linear(srcformat->format)) {
if (snd_pcm_format_linear(dstformat.format))
tmpformat.format = dstformat.format;
else
tmpformat.format = SND_PCM_SFMT_S16;
tmpformat.interleave = dstformat.interleave;
switch (srcformat->format) {
case SND_PCM_SFMT_MU_LAW:
err = snd_pcm_plugin_build_mulaw(plug,
srcformat, &tmpformat,
&plugin);
break;
#ifndef __KERNEL__
case SND_PCM_SFMT_A_LAW:
err = snd_pcm_plugin_build_alaw(plug,
srcformat, &tmpformat,
&plugin);
break;
case SND_PCM_SFMT_IMA_ADPCM:
err = snd_pcm_plugin_build_adpcm(plug,
srcformat, &tmpformat,
&plugin);
break;
#endif
default:
return -EINVAL;
}
pdprintf("format format change: src=%i, dst=%i returns %i\n", srcformat->format, tmpformat.format, err);
if (err < 0)
return err;
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
/* channels reduction */
if (srcformat->channels > dstformat.channels) {
int sv = srcformat->channels;
int dv = dstformat.channels;
route_ttable_entry_t *ttable = calloc(1, dv*sv*sizeof(*ttable));
#if 1
if (sv == 2 && dv == 1) {
ttable[0] = HALF;
ttable[1] = HALF;
} else
#endif
{
int v;
for (v = 0; v < dv; ++v)
ttable[v * sv + v] = FULL;
}
tmpformat.channels = dstformat.channels;
tmpformat.interleave = dstformat.interleave;
if (srcformat->rate == dstformat.rate &&
snd_pcm_format_linear(dstformat.format))
tmpformat.format = dstformat.format;
err = snd_pcm_plugin_build_route(plug,
srcformat, &tmpformat,
ttable, &plugin);
free(ttable);
pdprintf("format channels reduction: src=%i, dst=%i returns %i\n", srcformat->channels, tmpformat.channels, err);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
/* rate resampling */
if (srcformat->rate != dstformat.rate) {
tmpformat.rate = dstformat.rate;
tmpformat.interleave = dstformat.interleave;
if (srcformat->channels == dstformat.channels &&
snd_pcm_format_linear(dstformat.format))
tmpformat.format = dstformat.format;
err = snd_pcm_plugin_build_rate(plug,
srcformat, &tmpformat,
&plugin);
pdprintf("format rate down resampling: src=%i, dst=%i returns %i\n", srcformat->rate, tmpformat.rate, err);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
/* channels extension */
if (srcformat->channels < dstformat.channels) {
int sv = srcformat->channels;
int dv = dstformat.channels;
route_ttable_entry_t *ttable = calloc(1, dv * sv * sizeof(*ttable));
#if 0
{
int v;
for (v = 0; v < sv; ++v)
ttable[v * sv + v] = FULL;
}
#else
{
/* Playback is spreaded on all channels */
int vd, vs;
for (vd = 0, vs = 0; vd < dv; ++vd) {
ttable[vd * sv + vs] = FULL;
vs++;
if (vs == sv)
vs = 0;
}
}
#endif
tmpformat.channels = dstformat.channels;
tmpformat.interleave = dstformat.interleave;
if (snd_pcm_format_linear(dstformat.format))
tmpformat.format = dstformat.format;
err = snd_pcm_plugin_build_route(plug,
srcformat, &tmpformat,
ttable, &plugin);
free(ttable);
pdprintf("format channels extension: src=%i, dst=%i returns %i\n", srcformat->channels, tmpformat.channels, err);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
/* format change */
if (srcformat->format != dstformat.format) {
tmpformat.format = dstformat.format;
tmpformat.interleave = dstformat.interleave;
if (tmpformat.format == SND_PCM_SFMT_MU_LAW) {
err = snd_pcm_plugin_build_mulaw(plug,
srcformat, &tmpformat,
&plugin);
}
#ifndef __KERNEL__
else if (tmpformat.format == SND_PCM_SFMT_A_LAW) {
err = snd_pcm_plugin_build_alaw(plug,
srcformat, &tmpformat,
&plugin);
}
else if (tmpformat.format == SND_PCM_SFMT_IMA_ADPCM) {
err = snd_pcm_plugin_build_adpcm(plug,
srcformat, &tmpformat,
&plugin);
}
#endif
else if (snd_pcm_format_linear(srcformat->format) &&
snd_pcm_format_linear(tmpformat.format)) {
err = snd_pcm_plugin_build_linear(plug,
srcformat, &tmpformat,
&plugin);
}
else
return -EINVAL;
pdprintf("format format change: src=%i, dst=%i returns %i\n", srcformat->format, tmpformat.format, err);
if (err < 0)
return err;
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
/* interleave */
if (srcformat->interleave != dstformat.interleave) {
tmpformat.interleave = dstformat.interleave;
err = snd_pcm_plugin_build_copy(plug,
srcformat, &tmpformat,
&plugin);
pdprintf("interleave change: src=%i, dst=%i returns %i\n", srcformat->interleave, tmpformat.interleave, err);
if (err < 0)
return err;
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
*srcformat = tmpformat;
}
return 0;
}
ssize_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *plug,
char *buf,
size_t count,
snd_pcm_plugin_channel_t **channels)
{
snd_pcm_plugin_t *plugin;
snd_pcm_plugin_channel_t *v;
snd_pcm_format_t *format;
int width, nchannels, channel;
int stream = snd_pcm_plug_stream(plug);
assert(buf);
if (stream == SND_PCM_STREAM_PLAYBACK) {
plugin = snd_pcm_plug_first(plug);
format = &plugin->src_format;
}
else {
plugin = snd_pcm_plug_last(plug);
format = &plugin->dst_format;
}
v = plugin->buf_channels;
*channels = v;
if ((width = snd_pcm_format_physical_width(format->format)) < 0)
return width;
nchannels = format->channels;
assert(format->interleave || format->channels == 1);
for (channel = 0; channel < nchannels; channel++, v++) {
v->enabled = 1;
v->wanted = (stream == SND_PCM_STREAM_CAPTURE);
v->area.addr = buf;
v->area.first = channel * width;
v->area.step = nchannels * width;
}
return count;
}
ssize_t snd_pcm_plug_client_channels_iovec(snd_pcm_plug_t *plug,
const struct iovec *vector,
unsigned long count,
snd_pcm_plugin_channel_t **channels)
{
snd_pcm_plugin_t *plugin;
snd_pcm_plugin_channel_t *v;
snd_pcm_format_t *format;
int width;
unsigned int nchannels, channel;
int stream = snd_pcm_plug_stream(plug);
if (stream == SND_PCM_STREAM_PLAYBACK) {
plugin = snd_pcm_plug_first(plug);
format = &plugin->src_format;
}
else {
plugin = snd_pcm_plug_last(plug);
format = &plugin->dst_format;
}
v = plugin->buf_channels;
*channels = v;
if ((width = snd_pcm_format_physical_width(format->format)) < 0)
return width;
nchannels = format->channels;
if (format->interleave) {
assert(count == 1 && vector->iov_base);
for (channel = 0; channel < nchannels; channel++, v++) {
v->enabled = 1;
v->wanted = (stream == SND_PCM_STREAM_CAPTURE);
v->area.addr = vector->iov_base;
v->area.first = channel * width;
v->area.step = nchannels * width;
}
return vector->iov_len;
} else {
size_t len;
assert(count == nchannels);
len = vector->iov_len;
for (channel = 0; channel < nchannels; channel++, v++, vector++) {
assert(vector->iov_len == len);
v->enabled = (vector->iov_base != NULL);
v->wanted = (v->enabled && (stream == SND_PCM_STREAM_CAPTURE));
v->area.addr = vector->iov_base;
v->area.first = 0;
v->area.step = width;
}
return len;
}
}
int snd_pcm_plug_playback_channels_mask(snd_pcm_plug_t *plug,
bitset_t *client_vmask)
{
snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
if (plugin == NULL) {
#ifndef __KERNEL__
return snd_pcm_channels_mask(plug->slave, client_vmask);
#else
return 0;
#endif
} else {
int schannels = plugin->dst_format.channels;
bitset_t bs[bitset_size(schannels)];
bitset_t *srcmask;
bitset_t *dstmask = bs;
int err;
bitset_one(dstmask, schannels);
#ifndef __KERNEL__
err = snd_pcm_channels_mask(plug->slave, dstmask);
if (err < 0)
return err;
#endif
if (plugin == NULL) {
bitset_and(client_vmask, dstmask, schannels);
return 0;
}
while (1) {
err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
if (err < 0)
return err;
dstmask = srcmask;
if (plugin->prev == NULL)
break;
plugin = plugin->prev;
}
bitset_and(client_vmask, dstmask, plugin->src_format.channels);
return 0;
}
}
int snd_pcm_plug_capture_channels_mask(snd_pcm_plug_t *plug,
bitset_t *client_vmask)
{
snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
if (plugin == NULL) {
#ifndef __KERNEL__
return snd_pcm_channels_mask(plug->slave, client_vmask);
#else
return 0;
#endif
} else {
int schannels = plugin->src_format.channels;
bitset_t bs[bitset_size(schannels)];
bitset_t *srcmask = bs;
bitset_t *dstmask;
int err;
bitset_one(srcmask, schannels);
#ifndef __KERNEL__
err = snd_pcm_channels_mask(plug->slave, srcmask);
if (err < 0)
return err;
#endif
while (1) {
err = plugin->dst_channels_mask(plugin, srcmask, &dstmask);
if (err < 0)
return err;
srcmask = dstmask;
if (plugin->next == NULL)
break;
plugin = plugin->next;
}
bitset_and(client_vmask, srcmask, plugin->dst_format.channels);
return 0;
}
}
static int snd_pcm_plug_playback_disable_useless_channels(snd_pcm_plug_t *plug,
snd_pcm_plugin_channel_t *src_channels)
{
snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
unsigned int nchannels = plugin->src_format.channels;
bitset_t bs[bitset_size(nchannels)];
bitset_t *srcmask = bs;
int err;
unsigned int channel;
for (channel = 0; channel < nchannels; channel++) {
if (src_channels[channel].enabled)
bitset_set(srcmask, channel);
else
bitset_reset(srcmask, channel);
}
err = snd_pcm_plug_playback_channels_mask(plug, srcmask);
if (err < 0)
return err;
for (channel = 0; channel < nchannels; channel++) {
if (!bitset_get(srcmask, channel))
src_channels[channel].enabled = 0;
}
return 0;
}
static int snd_pcm_plug_capture_disable_useless_channels(snd_pcm_plug_t *plug,
snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *client_channels)
{
snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
unsigned int nchannels = plugin->dst_format.channels;
bitset_t bs[bitset_size(nchannels)];
bitset_t *dstmask = bs;
bitset_t *srcmask;
int err;
unsigned int channel;
for (channel = 0; channel < nchannels; channel++) {
if (client_channels[channel].enabled)
bitset_set(dstmask, channel);
else
bitset_reset(dstmask, channel);
}
while (plugin) {
err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
if (err < 0)
return err;
dstmask = srcmask;
plugin = plugin->prev;
}
#ifndef __KERNEL__
err = snd_pcm_channels_mask(plug->slave, dstmask);
if (err < 0)
return err;
#endif
plugin = snd_pcm_plug_first(plug);
nchannels = plugin->src_format.channels;
for (channel = 0; channel < nchannels; channel++) {
if (!bitset_get(dstmask, channel))
src_channels[channel].enabled = 0;
}
return 0;
}
ssize_t snd_pcm_plug_write_transfer(snd_pcm_plug_t *plug, snd_pcm_plugin_channel_t *src_channels, size_t size)
{
snd_pcm_plugin_t *plugin, *next;
snd_pcm_plugin_channel_t *dst_channels;
int err;
ssize_t frames = size;
if ((err = snd_pcm_plug_playback_disable_useless_channels(plug, src_channels)) < 0)
return err;
plugin = snd_pcm_plug_first(plug);
while (plugin && frames > 0) {
if ((next = plugin->next) != NULL) {
ssize_t frames1 = frames;
if (plugin->dst_frames)
frames1 = plugin->dst_frames(plugin, frames);
if ((err = next->client_channels(next, frames1, &dst_channels)) < 0) {
return err;
}
if (err != frames1) {
frames = err;
if (plugin->src_frames)
frames = plugin->src_frames(plugin, frames1);
}
} else
dst_channels = 0;
pdprintf("write plugin: %s, %i\n", plugin->name, frames);
if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0)
return frames;
src_channels = dst_channels;
plugin = next;
}
return snd_pcm_plug_client_size(plug, frames);
}
ssize_t snd_pcm_plug_read_transfer(snd_pcm_plug_t *plug, snd_pcm_plugin_channel_t *dst_channels_final, size_t size)
{
snd_pcm_plugin_t *plugin, *next;
snd_pcm_plugin_channel_t *src_channels, *dst_channels;
ssize_t frames = size;
int err;
frames = snd_pcm_plug_slave_size(plug, frames);
if (frames < 0)
return frames;
src_channels = 0;
plugin = snd_pcm_plug_first(plug);
while (plugin && frames > 0) {
if ((next = plugin->next) != NULL) {
if ((err = plugin->client_channels(plugin, frames, &dst_channels)) < 0) {
return err;
}
frames = err;
if (!plugin->prev) {
if ((err = snd_pcm_plug_capture_disable_useless_channels(plug, dst_channels, dst_channels_final) < 0))
return err;
}
} else {
dst_channels = dst_channels_final;
}
pdprintf("read plugin: %s, %i\n", plugin->name, frames);
if ((frames = plugin->transfer(plugin, src_channels, dst_channels, frames)) < 0)
return frames;
plugin = next;
src_channels = dst_channels;
}
return frames;
}
int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_area, size_t dst_offset,
size_t samples, int format)
{
/* FIXME: sub byte resolution and odd dst_offset */
char *dst;
unsigned int dst_step;
int width;
u_int64_t silence;
if (!dst_area->addr)
return 0;
dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8;
width = snd_pcm_format_physical_width(format);
silence = snd_pcm_format_silence_64(format);
if (dst_area->step == (unsigned int) width) {
size_t dwords = samples * width / 64;
samples -= dwords * 64 / width;
while (dwords-- > 0)
*((u_int64_t*)dst)++ = silence;
if (samples == 0)
return 0;
}
dst_step = dst_area->step / 8;
switch (width) {
case 4: {
u_int8_t s0 = silence & 0xf0;
u_int8_t s1 = silence & 0x0f;
int dstbit = dst_area->first % 8;
int dstbit_step = dst_area->step % 8;
while (samples-- > 0) {
if (dstbit) {
*dst &= 0xf0;
*dst |= s1;
} else {
*dst &= 0x0f;
*dst |= s0;
}
dst += dst_step;
dstbit += dstbit_step;
if (dstbit == 8) {
dst++;
dstbit = 0;
}
}
break;
}
case 8: {
u_int8_t sil = silence;
while (samples-- > 0) {
*dst = sil;
dst += dst_step;
}
break;
}
case 16: {
u_int16_t sil = silence;
while (samples-- > 0) {
*(u_int16_t*)dst = sil;
dst += dst_step;
}
break;
}
case 32: {
u_int32_t sil = silence;
while (samples-- > 0) {
*(u_int32_t*)dst = sil;
dst += dst_step;
}
break;
}
case 64: {
while (samples-- > 0) {
*(u_int64_t*)dst = silence;
dst += dst_step;
}
break;
}
default:
assert(0);
}
return 0;
}
int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_areas, size_t dst_offset,
size_t vcount, size_t frames, int format)
{
int width = snd_pcm_format_physical_width(format);
while (vcount > 0) {
void *addr = dst_areas->addr;
unsigned int step = dst_areas->step;
const snd_pcm_channel_area_t *begin = dst_areas;
int vc = vcount;
unsigned int v = 0;
int err;
while (1) {
vc--;
v++;
dst_areas++;
if (vc == 0 ||
dst_areas->addr != addr ||
dst_areas->step != step ||
dst_areas->first != dst_areas[-1].first + width)
break;
}
if (v > 1 && v * width == step) {
/* Collapse the areas */
snd_pcm_channel_area_t d;
d.addr = begin->addr;
d.first = begin->first;
d.step = width;
err = snd_pcm_area_silence(&d, dst_offset * v, frames * v, format);
vcount -= v;
} else {
err = snd_pcm_area_silence(begin, dst_offset, frames, format);
dst_areas = begin + 1;
vcount--;
}
if (err < 0)
return err;
}
return 0;
}
int snd_pcm_area_copy(const snd_pcm_channel_area_t *src_area, size_t src_offset,
const snd_pcm_channel_area_t *dst_area, size_t dst_offset,
size_t samples, int format)
{
/* FIXME: sub byte resolution and odd dst_offset */
char *src, *dst;
int width;
int src_step, dst_step;
src = src_area->addr + (src_area->first + src_area->step * src_offset) / 8;
if (!src_area->addr)
return snd_pcm_area_silence(dst_area, dst_offset, samples, format);
dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8;
if (!dst_area->addr)
return 0;
width = snd_pcm_format_physical_width(format);
if (src_area->step == (unsigned int) width &&
dst_area->step == (unsigned int) width) {
size_t bytes = samples * width / 8;
samples -= bytes * 8 / width;
memcpy(dst, src, bytes);
if (samples == 0)
return 0;
}
src_step = src_area->step / 8;
dst_step = dst_area->step / 8;
switch (width) {
case 4: {
int srcbit = src_area->first % 8;
int srcbit_step = src_area->step % 8;
int dstbit = dst_area->first % 8;
int dstbit_step = dst_area->step % 8;
while (samples-- > 0) {
unsigned char srcval;
if (srcbit)
srcval = *src & 0x0f;
else
srcval = *src & 0xf0;
if (dstbit)
*dst &= 0xf0;
else
*dst &= 0x0f;
*dst |= srcval;
src += src_step;
srcbit += srcbit_step;
if (srcbit == 8) {
src++;
srcbit = 0;
}
dst += dst_step;
dstbit += dstbit_step;
if (dstbit == 8) {
dst++;
dstbit = 0;
}
}
break;
}
case 8: {
while (samples-- > 0) {
*dst = *src;
src += src_step;
dst += dst_step;
}
break;
}
case 16: {
while (samples-- > 0) {
*(u_int16_t*)dst = *(u_int16_t*)src;
src += src_step;
dst += dst_step;
}
break;
}
case 32: {
while (samples-- > 0) {
*(u_int32_t*)dst = *(u_int32_t*)src;
src += src_step;
dst += dst_step;
}
break;
}
case 64: {
while (samples-- > 0) {
*(u_int64_t*)dst = *(u_int64_t*)src;
src += src_step;
dst += dst_step;
}
break;
}
default:
assert(0);
}
return 0;
}
int snd_pcm_areas_copy(const snd_pcm_channel_area_t *src_areas, size_t src_offset,
const snd_pcm_channel_area_t *dst_areas, size_t dst_offset,
size_t vcount, size_t frames, int format)
{
int width = snd_pcm_format_physical_width(format);
while (vcount > 0) {
unsigned int step = src_areas->step;
void *src_addr = src_areas->addr;
const snd_pcm_channel_area_t *src_start = src_areas;
void *dst_addr = dst_areas->addr;
const snd_pcm_channel_area_t *dst_start = dst_areas;
int vc = vcount;
unsigned int v = 0;
while (dst_areas->step == step) {
vc--;
v++;
src_areas++;
dst_areas++;
if (vc == 0 ||
src_areas->step != step ||
src_areas->addr != src_addr ||
dst_areas->addr != dst_addr ||
src_areas->first != src_areas[-1].first + width ||
dst_areas->first != dst_areas[-1].first + width)
break;
}
if (v > 1 && v * width == step) {
/* Collapse the areas */
snd_pcm_channel_area_t s, d;
s.addr = src_start->addr;
s.first = src_start->first;
s.step = width;
d.addr = dst_start->addr;
d.first = dst_start->first;
d.step = width;
snd_pcm_area_copy(&s, src_offset * v, &d, dst_offset * v, frames * v, format);
vcount -= v;
} else {
snd_pcm_area_copy(src_start, src_offset, dst_start, dst_offset, frames, format);
src_areas = src_start + 1;
dst_areas = dst_start + 1;
vcount--;
}
}
return 0;
}
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