mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-31 22:25:35 -04:00
Merged pcmplug branch.
This commit is contained in:
Jaroslav Kysela
parent
40d1ee071d
commit
6962a9d6ce
61 changed files with 7172 additions and 6743 deletions
360
src/pcm/pcm_linear.c
Normal file
360
src/pcm/pcm_linear.c
Normal file
|
|
@ -0,0 +1,360 @@
|
|||
/*
|
||||
* PCM - Linear conversion
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <byteswap.h>
|
||||
#include "pcm_local.h"
|
||||
#include "pcm_plugin.h"
|
||||
|
||||
typedef struct {
|
||||
/* This field need to be the first */
|
||||
snd_pcm_plugin_t plug;
|
||||
int conv_idx;
|
||||
int sformat;
|
||||
int cformat;
|
||||
int cxfer_mode, cmmap_shape;
|
||||
} snd_pcm_linear_t;
|
||||
|
||||
static void linear_transfer(snd_pcm_channel_area_t *src_areas, size_t src_offset,
|
||||
snd_pcm_channel_area_t *dst_areas, size_t dst_offset,
|
||||
size_t frames, size_t channels, int convidx)
|
||||
{
|
||||
#define CONV_LABELS
|
||||
#include "plugin_ops.h"
|
||||
#undef CONV_LABELS
|
||||
void *conv = conv_labels[convidx];
|
||||
unsigned int channel;
|
||||
for (channel = 0; channel < channels; ++channel) {
|
||||
char *src;
|
||||
char *dst;
|
||||
int src_step, dst_step;
|
||||
size_t frames1;
|
||||
snd_pcm_channel_area_t *src_area = &src_areas[channel];
|
||||
snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
|
||||
#if 0
|
||||
if (!src_area->enabled) {
|
||||
if (dst_area->wanted)
|
||||
snd_pcm_area_silence(dst_area, dst_offset, frames, dst_sfmt);
|
||||
dst_area->enabled = 0;
|
||||
continue;
|
||||
}
|
||||
dst_area->enabled = 1;
|
||||
#endif
|
||||
src = snd_pcm_channel_area_addr(src_area, src_offset);
|
||||
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
|
||||
src_step = snd_pcm_channel_area_step(src_area);
|
||||
dst_step = snd_pcm_channel_area_step(dst_area);
|
||||
frames1 = frames;
|
||||
while (frames1-- > 0) {
|
||||
goto *conv;
|
||||
#define CONV_END after
|
||||
#include "plugin_ops.h"
|
||||
#undef CONV_END
|
||||
after:
|
||||
src += src_step;
|
||||
dst += dst_step;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int snd_pcm_linear_params_info(snd_pcm_t *pcm, snd_pcm_params_info_t * info)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
unsigned int req_mask = info->req_mask;
|
||||
unsigned int sfmt = info->req.format.sfmt;
|
||||
int err;
|
||||
if (req_mask & SND_PCM_PARAMS_SFMT &&
|
||||
!snd_pcm_format_linear(sfmt)) {
|
||||
info->req.fail_mask = SND_PCM_PARAMS_SFMT;
|
||||
info->req.fail_reason = SND_PCM_PARAMS_FAIL_INVAL;
|
||||
return -EINVAL;
|
||||
}
|
||||
info->req_mask |= SND_PCM_PARAMS_SFMT;
|
||||
info->req_mask &= ~(SND_PCM_PARAMS_MMAP_SHAPE |
|
||||
SND_PCM_PARAMS_XFER_MODE);
|
||||
info->req.format.sfmt = linear->sformat;
|
||||
err = snd_pcm_params_info(linear->plug.slave, info);
|
||||
info->req_mask = req_mask;
|
||||
info->req.format.sfmt = sfmt;
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (req_mask & SND_PCM_PARAMS_SFMT)
|
||||
info->formats = 1 << sfmt;
|
||||
else
|
||||
info->formats = SND_PCM_LINEAR_FORMATS;
|
||||
info->flags &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
|
||||
info->flags |= SND_PCM_INFO_INTERLEAVED | SND_PCM_INFO_NONINTERLEAVED;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_pcm_linear_params(snd_pcm_t *pcm, snd_pcm_params_t * params)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
snd_pcm_t *slave = linear->plug.slave;
|
||||
int err;
|
||||
if (!snd_pcm_format_linear(params->format.sfmt)) {
|
||||
params->fail_mask = SND_PCM_PARAMS_SFMT;
|
||||
params->fail_reason = SND_PCM_PARAMS_FAIL_INVAL;
|
||||
return -EINVAL;
|
||||
}
|
||||
if (slave->mmap_data) {
|
||||
err = snd_pcm_munmap_data(slave);
|
||||
if (err < 0)
|
||||
return err;
|
||||
}
|
||||
linear->cformat = params->format.sfmt;
|
||||
linear->cxfer_mode = params->xfer_mode;
|
||||
linear->cmmap_shape = params->mmap_shape;
|
||||
params->format.sfmt = linear->sformat;
|
||||
params->xfer_mode = SND_PCM_XFER_UNSPECIFIED;
|
||||
params->mmap_shape = SND_PCM_MMAP_UNSPECIFIED;
|
||||
err = snd_pcm_params(slave, params);
|
||||
params->format.sfmt = linear->cformat;
|
||||
params->xfer_mode = linear->cxfer_mode;
|
||||
params->mmap_shape = linear->cmmap_shape;
|
||||
if (slave->valid_setup) {
|
||||
int r = snd_pcm_mmap_data(slave, NULL);
|
||||
assert(r >= 0);
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_pcm_linear_setup(snd_pcm_t *pcm, snd_pcm_setup_t * setup)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
int err = snd_pcm_setup(linear->plug.slave, setup);
|
||||
if (err < 0)
|
||||
return err;
|
||||
assert(linear->sformat == setup->format.sfmt);
|
||||
|
||||
if (linear->cxfer_mode == SND_PCM_XFER_UNSPECIFIED)
|
||||
setup->xfer_mode = SND_PCM_XFER_NONINTERLEAVED;
|
||||
else
|
||||
setup->xfer_mode = linear->cxfer_mode;
|
||||
if (linear->cmmap_shape == SND_PCM_MMAP_UNSPECIFIED)
|
||||
setup->mmap_shape = SND_PCM_MMAP_NONINTERLEAVED;
|
||||
else
|
||||
setup->mmap_shape = linear->cmmap_shape;
|
||||
setup->format.sfmt = linear->cformat;
|
||||
setup->mmap_bytes = 0;
|
||||
if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
|
||||
linear->conv_idx = conv_index(linear->cformat,
|
||||
linear->sformat);
|
||||
else
|
||||
linear->conv_idx = conv_index(linear->sformat,
|
||||
linear->cformat);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t snd_pcm_linear_write_areas(snd_pcm_t *pcm,
|
||||
snd_pcm_channel_area_t *areas,
|
||||
size_t offset,
|
||||
size_t size,
|
||||
size_t *slave_sizep)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
snd_pcm_t *slave = linear->plug.slave;
|
||||
size_t xfer = 0;
|
||||
ssize_t err = 0;
|
||||
if (slave_sizep && *slave_sizep < size)
|
||||
size = *slave_sizep;
|
||||
assert(size > 0);
|
||||
while (xfer < size) {
|
||||
size_t frames = snd_pcm_mmap_playback_xfer(slave, size - xfer);
|
||||
linear_transfer(areas, offset,
|
||||
slave->mmap_areas, snd_pcm_mmap_offset(slave),
|
||||
frames, pcm->setup.format.channels, linear->conv_idx);
|
||||
err = snd_pcm_mmap_forward(slave, frames);
|
||||
if (err < 0)
|
||||
break;
|
||||
assert((size_t)err == frames);
|
||||
offset += err;
|
||||
xfer += err;
|
||||
snd_pcm_mmap_hw_forward(pcm, err);
|
||||
}
|
||||
if (xfer > 0) {
|
||||
if (slave_sizep)
|
||||
*slave_sizep = xfer;
|
||||
return xfer;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static ssize_t snd_pcm_linear_read_areas(snd_pcm_t *pcm,
|
||||
snd_pcm_channel_area_t *areas,
|
||||
size_t offset,
|
||||
size_t size,
|
||||
size_t *slave_sizep)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
snd_pcm_t *slave = linear->plug.slave;
|
||||
size_t xfer = 0;
|
||||
ssize_t err = 0;
|
||||
if (slave_sizep && *slave_sizep < size)
|
||||
size = *slave_sizep;
|
||||
assert(size > 0);
|
||||
while (xfer < size) {
|
||||
size_t frames = snd_pcm_mmap_capture_xfer(slave, size - xfer);
|
||||
linear_transfer(slave->mmap_areas, snd_pcm_mmap_offset(slave),
|
||||
areas, offset,
|
||||
frames, pcm->setup.format.channels, linear->conv_idx);
|
||||
err = snd_pcm_mmap_forward(slave, frames);
|
||||
if (err < 0)
|
||||
break;
|
||||
assert((size_t)err == frames);
|
||||
offset += err;
|
||||
xfer += err;
|
||||
snd_pcm_mmap_hw_forward(pcm, err);
|
||||
}
|
||||
if (xfer > 0) {
|
||||
if (slave_sizep)
|
||||
*slave_sizep = xfer;
|
||||
return xfer;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static void snd_pcm_linear_dump(snd_pcm_t *pcm, FILE *fp)
|
||||
{
|
||||
snd_pcm_linear_t *linear = pcm->private;
|
||||
fprintf(fp, "Linear conversion PCM (%s)\n",
|
||||
snd_pcm_format_name(linear->sformat));
|
||||
if (pcm->valid_setup) {
|
||||
fprintf(fp, "Its setup is:\n");
|
||||
snd_pcm_dump_setup(pcm, fp);
|
||||
}
|
||||
fprintf(fp, "Slave: ");
|
||||
snd_pcm_dump(linear->plug.slave, fp);
|
||||
}
|
||||
|
||||
struct snd_pcm_ops snd_pcm_linear_ops = {
|
||||
close: snd_pcm_plugin_close,
|
||||
info: snd_pcm_plugin_info,
|
||||
params_info: snd_pcm_linear_params_info,
|
||||
params: snd_pcm_linear_params,
|
||||
setup: snd_pcm_linear_setup,
|
||||
channel_info: snd_pcm_plugin_channel_info,
|
||||
channel_params: snd_pcm_plugin_channel_params,
|
||||
channel_setup: snd_pcm_plugin_channel_setup,
|
||||
dump: snd_pcm_linear_dump,
|
||||
nonblock: snd_pcm_plugin_nonblock,
|
||||
mmap_status: snd_pcm_plugin_mmap_status,
|
||||
mmap_control: snd_pcm_plugin_mmap_control,
|
||||
mmap_data: snd_pcm_plugin_mmap_data,
|
||||
munmap_status: snd_pcm_plugin_munmap_status,
|
||||
munmap_control: snd_pcm_plugin_munmap_control,
|
||||
munmap_data: snd_pcm_plugin_munmap_data,
|
||||
};
|
||||
|
||||
int snd_pcm_linear_open(snd_pcm_t **handlep, int sformat, snd_pcm_t *slave, int close_slave)
|
||||
{
|
||||
snd_pcm_t *handle;
|
||||
snd_pcm_linear_t *linear;
|
||||
int err;
|
||||
assert(handlep && slave);
|
||||
if (snd_pcm_format_linear(sformat) != 1)
|
||||
return -EINVAL;
|
||||
linear = calloc(1, sizeof(snd_pcm_linear_t));
|
||||
if (!linear) {
|
||||
return -ENOMEM;
|
||||
}
|
||||
linear->sformat = sformat;
|
||||
linear->plug.read = snd_pcm_linear_read_areas;
|
||||
linear->plug.write = snd_pcm_linear_write_areas;
|
||||
linear->plug.slave = slave;
|
||||
linear->plug.close_slave = close_slave;
|
||||
|
||||
handle = calloc(1, sizeof(snd_pcm_t));
|
||||
if (!handle) {
|
||||
free(linear);
|
||||
return -ENOMEM;
|
||||
}
|
||||
handle->type = SND_PCM_TYPE_LINEAR;
|
||||
handle->stream = slave->stream;
|
||||
handle->ops = &snd_pcm_linear_ops;
|
||||
handle->op_arg = handle;
|
||||
handle->fast_ops = &snd_pcm_plugin_fast_ops;
|
||||
handle->fast_op_arg = handle;
|
||||
handle->mode = slave->mode;
|
||||
handle->private = linear;
|
||||
err = snd_pcm_init(handle);
|
||||
if (err < 0) {
|
||||
snd_pcm_close(handle);
|
||||
return err;
|
||||
}
|
||||
*handlep = handle;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int _snd_pcm_linear_open(snd_pcm_t **pcmp, char *name,
|
||||
snd_config_t *conf,
|
||||
int stream, int mode)
|
||||
{
|
||||
snd_config_iterator_t i;
|
||||
char *sname = NULL;
|
||||
int err;
|
||||
snd_pcm_t *spcm;
|
||||
int sformat = -1;
|
||||
snd_config_foreach(i, conf) {
|
||||
snd_config_t *n = snd_config_entry(i);
|
||||
if (strcmp(n->id, "comment") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "type") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "stream") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "sname") == 0) {
|
||||
err = snd_config_string_get(n, &sname);
|
||||
if (err < 0)
|
||||
return -EINVAL;
|
||||
continue;
|
||||
}
|
||||
if (strcmp(n->id, "sformat") == 0) {
|
||||
char *f;
|
||||
err = snd_config_string_get(n, &f);
|
||||
if (err < 0)
|
||||
return -EINVAL;
|
||||
sformat = snd_pcm_format_value(f);
|
||||
if (sformat < 0)
|
||||
return -EINVAL;
|
||||
if (snd_pcm_format_linear(sformat) != 1)
|
||||
return -EINVAL;
|
||||
continue;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
if (!sname || !sformat)
|
||||
return -EINVAL;
|
||||
/* This is needed cause snd_config_update may destroy config */
|
||||
sname = strdup(sname);
|
||||
if (!sname)
|
||||
return -ENOMEM;
|
||||
err = snd_pcm_open(&spcm, sname, stream, mode);
|
||||
free(sname);
|
||||
if (err < 0)
|
||||
return err;
|
||||
err = snd_pcm_linear_open(pcmp, sformat, spcm, 1);
|
||||
if (err < 0)
|
||||
snd_pcm_close(spcm);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue