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nest-open-source / manifest_repos / alsa-lib / 91b115c7e2882e4b0087bde5650efc541c438b1a / . / src / pcm / pcm_route.c
blob: 2a437e88b93cf1f308d241d58663f3f14758d4f4 [file] [log] [blame]
/**
* \file pcm/pcm_route.c
* \ingroup PCM_Plugins
* \brief PCM Route & Volume Plugin Interface
* \author Abramo Bagnara <abramo@alsa-project.org>
* \date 2000-2001
*/
/*
* PCM - Route & Volume Plugin
* 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 Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <byteswap.h>
#include <math.h>
#include "pcm_local.h"
#include "pcm_plugin.h"
#include "plugin_ops.h"
#ifndef PIC
/* entry for static linking */
const char *_snd_module_pcm_route = "";
#endif
#ifndef DOC_HIDDEN
/* The best possible hack to support missing optimization in gcc 2.7.2.3 */
#if SND_PCM_PLUGIN_ROUTE_RESOLUTION & (SND_PCM_PLUGIN_ROUTE_RESOLUTION - 1) != 0
#define div(a) a /= SND_PCM_PLUGIN_ROUTE_RESOLUTION
#elif SND_PCM_PLUGIN_ROUTE_RESOLUTION == 16
#define div(a) a >>= 4
#else
#error "Add some code here"
#endif
typedef struct {
int channel;
int as_int;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
float as_float;
#endif
} snd_pcm_route_ttable_src_t;
typedef struct snd_pcm_route_ttable_dst snd_pcm_route_ttable_dst_t;
typedef struct {
enum {UINT64, FLOAT} sum_idx;
unsigned int get_idx;
unsigned int put_idx;
unsigned int conv_idx;
int use_getput;
unsigned int src_size;
snd_pcm_format_t dst_sfmt;
unsigned int nsrcs;
unsigned int ndsts;
snd_pcm_route_ttable_dst_t *dsts;
} snd_pcm_route_params_t;
typedef void (*route_f)(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int src_channels,
snd_pcm_uframes_t frames,
const snd_pcm_route_ttable_dst_t *ttable,
const snd_pcm_route_params_t *params);
struct snd_pcm_route_ttable_dst {
int att; /* Attenuated */
unsigned int nsrcs;
snd_pcm_route_ttable_src_t* srcs;
route_f func;
};
typedef union {
int32_t as_sint32;
int64_t as_sint64;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
float as_float;
#endif
} sum_t;
typedef struct {
/* This field need to be the first */
snd_pcm_plugin_t plug;
snd_pcm_format_t sformat;
int schannels;
snd_pcm_route_params_t params;
snd_pcm_chmap_t *chmap;
} snd_pcm_route_t;
#endif /* DOC_HIDDEN */
static void snd_pcm_route_convert1_zero(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas ATTRIBUTE_UNUSED,
snd_pcm_uframes_t src_offset ATTRIBUTE_UNUSED,
unsigned int src_channels ATTRIBUTE_UNUSED,
snd_pcm_uframes_t frames,
const snd_pcm_route_ttable_dst_t* ttable ATTRIBUTE_UNUSED,
const snd_pcm_route_params_t *params)
{
snd_pcm_area_silence(dst_area, dst_offset, frames, params->dst_sfmt);
}
#ifndef DOC_HIDDEN
static void snd_pcm_route_convert1_one(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int src_channels,
snd_pcm_uframes_t frames,
const snd_pcm_route_ttable_dst_t* ttable,
const snd_pcm_route_params_t *params)
{
#define CONV_LABELS
#include "plugin_ops.h"
#undef CONV_LABELS
void *conv;
const snd_pcm_channel_area_t *src_area = 0;
unsigned int srcidx;
const char *src;
char *dst;
int src_step, dst_step;
for (srcidx = 0; srcidx < ttable->nsrcs && srcidx < src_channels; ++srcidx) {
unsigned int channel = ttable->srcs[srcidx].channel;
if (channel >= src_channels)
continue;
src_area = &src_areas[channel];
if (src_area->addr != NULL)
break;
}
if (srcidx == ttable->nsrcs || srcidx == src_channels) {
snd_pcm_route_convert1_zero(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, ttable, params);
return;
}
conv = conv_labels[params->conv_idx];
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);
while (frames-- > 0) {
goto *conv;
#define CONV_END after
#include "plugin_ops.h"
#undef CONV_END
after:
src += src_step;
dst += dst_step;
}
}
static void snd_pcm_route_convert1_one_getput(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int src_channels,
snd_pcm_uframes_t frames,
const snd_pcm_route_ttable_dst_t* ttable,
const snd_pcm_route_params_t *params)
{
#define CONV24_LABELS
#include "plugin_ops.h"
#undef CONV24_LABELS
void *get, *put;
const snd_pcm_channel_area_t *src_area = 0;
unsigned int srcidx;
const char *src;
char *dst;
int src_step, dst_step;
u_int32_t sample = 0;
for (srcidx = 0; srcidx < ttable->nsrcs && srcidx < src_channels; ++srcidx) {
unsigned int channel = ttable->srcs[srcidx].channel;
if (channel >= src_channels)
continue;
src_area = &src_areas[channel];
if (src_area->addr != NULL)
break;
}
if (srcidx == ttable->nsrcs || srcidx == src_channels) {
snd_pcm_route_convert1_zero(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, ttable, params);
return;
}
get = get32_labels[params->get_idx];
put = put32_labels[params->put_idx];
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);
while (frames-- > 0) {
goto *get;
#define CONV24_END after
#include "plugin_ops.h"
#undef CONV24_END
after:
src += src_step;
dst += dst_step;
}
}
static void snd_pcm_route_convert1_many(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int src_channels,
snd_pcm_uframes_t frames,
const snd_pcm_route_ttable_dst_t* ttable,
const snd_pcm_route_params_t *params)
{
#define GET32_LABELS
#define PUT32_LABELS
#include "plugin_ops.h"
#undef GET32_LABELS
#undef PUT32_LABELS
static void *const zero_labels[2] = {
&&zero_int64,
#if SND_PCM_PLUGIN_ROUTE_FLOAT
&&zero_float
#endif
};
/* sum_type att */
static void *const add_labels[2 * 2] = {
&&add_int64_noatt, &&add_int64_att,
#if SND_PCM_PLUGIN_ROUTE_FLOAT
&&add_float_noatt, &&add_float_att
#endif
};
/* sum_type att */
static void *const norm_labels[2 * 2] = {
&&norm_int64_noatt,
&&norm_int64_att,
#if SND_PCM_PLUGIN_ROUTE_FLOAT
&&norm_float,
&&norm_float,
#endif
};
void *zero, *get32, *add, *norm, *put32;
int nsrcs = ttable->nsrcs;
char *dst;
int dst_step;
const char *srcs[nsrcs];
int src_steps[nsrcs];
snd_pcm_route_ttable_src_t src_tt[nsrcs];
int32_t sample = 0;
int srcidx, srcidx1 = 0;
for (srcidx = 0; srcidx < nsrcs && (unsigned)srcidx < src_channels; ++srcidx) {
const snd_pcm_channel_area_t *src_area;
unsigned int channel = ttable->srcs[srcidx].channel;
if (channel >= src_channels)
continue;
src_area = &src_areas[channel];
srcs[srcidx1] = snd_pcm_channel_area_addr(src_area, src_offset);
src_steps[srcidx1] = snd_pcm_channel_area_step(src_area);
src_tt[srcidx1] = ttable->srcs[srcidx];
srcidx1++;
}
nsrcs = srcidx1;
if (nsrcs == 0) {
snd_pcm_route_convert1_zero(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, ttable, params);
return;
} else if (nsrcs == 1 && src_tt[0].as_int == SND_PCM_PLUGIN_ROUTE_RESOLUTION) {
if (params->use_getput)
snd_pcm_route_convert1_one_getput(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, ttable, params);
else
snd_pcm_route_convert1_one(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, ttable, params);
return;
}
zero = zero_labels[params->sum_idx];
get32 = get32_labels[params->get_idx];
add = add_labels[params->sum_idx * 2 + ttable->att];
norm = norm_labels[params->sum_idx * 2 + ttable->att];
put32 = put32_labels[params->put_idx];
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
dst_step = snd_pcm_channel_area_step(dst_area);
while (frames-- > 0) {
snd_pcm_route_ttable_src_t *ttp = src_tt;
sum_t sum;
/* Zero sum */
goto *zero;
zero_int64:
sum.as_sint64 = 0;
goto zero_end;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
zero_float:
sum.as_float = 0.0;
goto zero_end;
#endif
zero_end:
for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
const char *src = srcs[srcidx];
/* Get sample */
goto *get32;
#define GET32_END after_get
#include "plugin_ops.h"
#undef GET32_END
after_get:
/* Sum */
goto *add;
add_int64_att:
sum.as_sint64 += (int64_t) sample * ttp->as_int;
goto after_sum;
add_int64_noatt:
if (ttp->as_int)
sum.as_sint64 += sample;
goto after_sum;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
add_float_att:
sum.as_float += sample * ttp->as_float;
goto after_sum;
add_float_noatt:
if (ttp->as_int)
sum.as_float += sample;
goto after_sum;
#endif
after_sum:
srcs[srcidx] += src_steps[srcidx];
ttp++;
}
/* Normalization */
goto *norm;
norm_int64_att:
div(sum.as_sint64);
/* fallthru */
norm_int64_noatt:
if (sum.as_sint64 > (int64_t)0x7fffffff)
sample = 0x7fffffff; /* maximum positive value */
else if (sum.as_sint64 < -(int64_t)0x80000000)
sample = 0x80000000; /* maximum negative value */
else
sample = sum.as_sint64;
goto after_norm;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
norm_float:
sum.as_float = rint(sum.as_float);
if (sum.as_float > (int64_t)0x7fffffff)
sample = 0x7fffffff; /* maximum positive value */
else if (sum.as_float < -(int64_t)0x80000000)
sample = 0x80000000; /* maximum negative value */
else
sample = sum.as_float;
goto after_norm;
#endif
after_norm:
/* Put sample */
goto *put32;
#define PUT32_END after_put32
#include "plugin_ops.h"
#undef PUT32_END
after_put32:
dst += dst_step;
}
}
#endif /* DOC_HIDDEN */
static void snd_pcm_route_convert(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int src_channels,
unsigned int dst_channels,
snd_pcm_uframes_t frames,
snd_pcm_route_params_t *params)
{
unsigned int dst_channel;
snd_pcm_route_ttable_dst_t *dstp;
const snd_pcm_channel_area_t *dst_area;
dstp = params->dsts;
dst_area = dst_areas;
for (dst_channel = 0; dst_channel < dst_channels; ++dst_channel) {
if (dst_channel >= params->ndsts)
snd_pcm_route_convert1_zero(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, dstp, params);
else
dstp->func(dst_area, dst_offset,
src_areas, src_offset,
src_channels,
frames, dstp, params);
dstp++;
dst_area++;
}
}
static int snd_pcm_route_close(snd_pcm_t *pcm)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_route_params_t *params = &route->params;
unsigned int dst_channel;
if (params->dsts) {
for (dst_channel = 0; dst_channel < params->ndsts; ++dst_channel) {
free(params->dsts[dst_channel].srcs);
}
free(params->dsts);
}
free(route->chmap);
return snd_pcm_generic_close(pcm);
}
static int snd_pcm_route_hw_refine_cprepare(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params)
{
int err;
snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM };
snd_pcm_format_mask_t format_mask = { SND_PCM_FMTBIT_LINEAR };
err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS,
&access_mask);
if (err < 0)
return err;
err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
&format_mask);
if (err < 0)
return err;
err = _snd_pcm_hw_params_set_subformat(params, SND_PCM_SUBFORMAT_STD);
if (err < 0)
return err;
err = _snd_pcm_hw_param_set_min(params, SND_PCM_HW_PARAM_CHANNELS, 1, 0);
if (err < 0)
return err;
params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
return 0;
}
static int snd_pcm_route_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP };
_snd_pcm_hw_params_any(sparams);
_snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS,
&saccess_mask);
if (route->sformat != SND_PCM_FORMAT_UNKNOWN) {
_snd_pcm_hw_params_set_format(sparams, route->sformat);
_snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD);
}
if (route->schannels >= 0) {
_snd_pcm_hw_param_set(sparams, SND_PCM_HW_PARAM_CHANNELS,
(unsigned int) route->schannels, 0);
}
return 0;
}
static int snd_pcm_route_hw_refine_schange(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
snd_pcm_hw_params_t *sparams)
{
snd_pcm_route_t *route = pcm->private_data;
int err;
unsigned int links = (SND_PCM_HW_PARBIT_RATE |
SND_PCM_HW_PARBIT_PERIODS |
SND_PCM_HW_PARBIT_PERIOD_SIZE |
SND_PCM_HW_PARBIT_PERIOD_TIME |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
SND_PCM_HW_PARBIT_BUFFER_TIME |
SND_PCM_HW_PARBIT_TICK_TIME);
if (route->sformat == SND_PCM_FORMAT_UNKNOWN)
links |= (SND_PCM_HW_PARBIT_FORMAT |
SND_PCM_HW_PARBIT_SUBFORMAT |
SND_PCM_HW_PARBIT_SAMPLE_BITS);
if (route->schannels < 0)
links |= SND_PCM_HW_PARBIT_CHANNELS;
err = _snd_pcm_hw_params_refine(sparams, links, params);
if (err < 0)
return err;
return 0;
}
static int snd_pcm_route_hw_refine_cchange(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
snd_pcm_hw_params_t *sparams)
{
snd_pcm_route_t *route = pcm->private_data;
int err;
unsigned int links = (SND_PCM_HW_PARBIT_RATE |
SND_PCM_HW_PARBIT_PERIODS |
SND_PCM_HW_PARBIT_PERIOD_SIZE |
SND_PCM_HW_PARBIT_PERIOD_TIME |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
SND_PCM_HW_PARBIT_BUFFER_TIME |
SND_PCM_HW_PARBIT_TICK_TIME);
if (route->sformat == SND_PCM_FORMAT_UNKNOWN)
links |= (SND_PCM_HW_PARBIT_FORMAT |
SND_PCM_HW_PARBIT_SUBFORMAT |
SND_PCM_HW_PARBIT_SAMPLE_BITS);
if (route->schannels < 0)
links |= SND_PCM_HW_PARBIT_CHANNELS;
err = _snd_pcm_hw_params_refine(params, links, sparams);
if (err < 0)
return err;
return 0;
}
static int snd_pcm_route_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
{
return snd_pcm_hw_refine_slave(pcm, params,
snd_pcm_route_hw_refine_cprepare,
snd_pcm_route_hw_refine_cchange,
snd_pcm_route_hw_refine_sprepare,
snd_pcm_route_hw_refine_schange,
snd_pcm_generic_hw_refine);
}
static int snd_pcm_route_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_t *slave = route->plug.gen.slave;
snd_pcm_format_t src_format, dst_format;
int err = snd_pcm_hw_params_slave(pcm, params,
snd_pcm_route_hw_refine_cchange,
snd_pcm_route_hw_refine_sprepare,
snd_pcm_route_hw_refine_schange,
snd_pcm_generic_hw_params);
if (err < 0)
return err;
if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
err = INTERNAL(snd_pcm_hw_params_get_format)(params, &src_format);
dst_format = slave->format;
} else {
src_format = slave->format;
err = INTERNAL(snd_pcm_hw_params_get_format)(params, &dst_format);
}
if (err < 0)
return err;
/* 3 bytes formats? */
route->params.use_getput =
(snd_pcm_format_physical_width(src_format) + 7) / 3 == 3 ||
(snd_pcm_format_physical_width(dst_format) + 7) / 3 == 3;
route->params.get_idx = snd_pcm_linear_get_index(src_format, SND_PCM_FORMAT_S32);
route->params.put_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, dst_format);
route->params.conv_idx = snd_pcm_linear_convert_index(src_format, dst_format);
route->params.src_size = snd_pcm_format_width(src_format) / 8;
route->params.dst_sfmt = dst_format;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
route->params.sum_idx = FLOAT;
#else
route->params.sum_idx = UINT64;
#endif
return 0;
}
static snd_pcm_uframes_t
snd_pcm_route_write_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
const snd_pcm_channel_area_t *slave_areas,
snd_pcm_uframes_t slave_offset,
snd_pcm_uframes_t *slave_sizep)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_t *slave = route->plug.gen.slave;
if (size > *slave_sizep)
size = *slave_sizep;
snd_pcm_route_convert(slave_areas, slave_offset,
areas, offset,
pcm->channels,
slave->channels,
size, &route->params);
*slave_sizep = size;
return size;
}
static snd_pcm_uframes_t
snd_pcm_route_read_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
const snd_pcm_channel_area_t *slave_areas,
snd_pcm_uframes_t slave_offset,
snd_pcm_uframes_t *slave_sizep)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_t *slave = route->plug.gen.slave;
if (size > *slave_sizep)
size = *slave_sizep;
snd_pcm_route_convert(areas, offset,
slave_areas, slave_offset,
slave->channels,
pcm->channels,
size, &route->params);
*slave_sizep = size;
return size;
}
static snd_pcm_chmap_t *snd_pcm_route_get_chmap(snd_pcm_t *pcm)
{
snd_pcm_route_t *route = pcm->private_data;
snd_pcm_chmap_t *map, *slave_map;
unsigned int src, dst, nsrcs;
slave_map = snd_pcm_generic_get_chmap(pcm);
if (!slave_map)
return NULL;
nsrcs = route->params.nsrcs;
map = calloc(4, nsrcs + 1);
if (!map) {
free(slave_map);
return NULL;
}
map->channels = nsrcs;
for (src = 0; src < nsrcs; src++)
map->pos[src] = SND_CHMAP_NA;
for (dst = 0; dst < route->params.ndsts; dst++) {
snd_pcm_route_ttable_dst_t *d = &route->params.dsts[dst];
for (src = 0; src < d->nsrcs; src++) {
unsigned int c = d->srcs[src].channel;
if (c < nsrcs && map->pos[c] == SND_CHMAP_NA)
map->pos[c] = slave_map->pos[dst];
}
}
free(slave_map);
return map;
}
static snd_pcm_chmap_query_t **snd_pcm_route_query_chmaps(snd_pcm_t *pcm)
{
snd_pcm_chmap_query_t **maps;
snd_pcm_chmap_t *map = snd_pcm_route_get_chmap(pcm);
if (!map)
return NULL;
maps = _snd_pcm_make_single_query_chmaps(map);
free(map);
return maps;
}
static void snd_pcm_route_dump(snd_pcm_t *pcm, snd_output_t *out)
{
snd_pcm_route_t *route = pcm->private_data;
unsigned int dst;
if (route->sformat == SND_PCM_FORMAT_UNKNOWN)
snd_output_printf(out, "Route conversion PCM\n");
else
snd_output_printf(out, "Route conversion PCM (sformat=%s)\n",
snd_pcm_format_name(route->sformat));
snd_output_puts(out, " Transformation table:\n");
for (dst = 0; dst < route->params.ndsts; dst++) {
snd_pcm_route_ttable_dst_t *d = &route->params.dsts[dst];
unsigned int src;
snd_output_printf(out, " %d <- ", dst);
if (d->nsrcs == 0) {
snd_output_printf(out, "none\n");
continue;
}
src = 0;
while (1) {
snd_pcm_route_ttable_src_t *s = &d->srcs[src];
if (d->att)
#if SND_PCM_PLUGIN_ROUTE_FLOAT
snd_output_printf(out, "%d*%g", s->channel, s->as_float);
#else
snd_output_printf(out, "%d*%g", s->channel, (double)s->as_int / (double)SND_PCM_PLUGIN_ROUTE_RESOLUTION);
#endif
else
snd_output_printf(out, "%d", s->channel);
src++;
if (src == d->nsrcs)
break;
snd_output_puts(out, " + ");
}
snd_output_putc(out, '\n');
}
if (pcm->setup) {
snd_output_printf(out, "Its setup is:\n");
snd_pcm_dump_setup(pcm, out);
}
snd_output_printf(out, "Slave: ");
snd_pcm_dump(route->plug.gen.slave, out);
}
/*
* Converts a string to an array of channel indices:
* - Given a number, the result is an array with one element,
* containing that number
* - Given a channel name (e g "FL") and a chmap,
* it will look this up in the chmap and return all matches
* - Given a channel name and no chmap, the result is an array with one element,
containing alsa standard channel map. Note that this might be a negative
number in case of "UNKNOWN", "NA" or "MONO".
* Return value is number of matches written.
*/
static int strtochannel(const char *id, snd_pcm_chmap_t *chmap,
long *channel, int channel_size)
{
int ch;
if (safe_strtol(id, channel) >= 0)
return 1;
ch = (int) snd_pcm_chmap_from_string(id);
if (ch == -1)
return -EINVAL;
if (chmap) {
int i, r = 0;
/* Start with highest channel to simplify implementation of
determine ttable size */
for (i = chmap->channels - 1; i >= 0; i--) {
if ((int) chmap->pos[i] != ch)
continue;
if (r >= channel_size)
continue;
channel[r++] = i;
}
return r;
}
else {
/* Assume ALSA standard channel mapping */
*channel = ch - SND_CHMAP_FL;
return 1;
}
}
#define MAX_CHMAP_CHANNELS 256
static int determine_chmap(snd_config_t *tt, snd_pcm_chmap_t **tt_chmap)
{
snd_config_iterator_t i, inext;
snd_pcm_chmap_t *chmap;
assert(tt && tt_chmap);
chmap = malloc(sizeof(snd_pcm_chmap_t) +
MAX_CHMAP_CHANNELS * sizeof(unsigned int));
chmap->channels = 0;
snd_config_for_each(i, inext, tt) {
const char *id;
snd_config_iterator_t j, jnext;
snd_config_t *in = snd_config_iterator_entry(i);
if (!snd_config_get_id(in, &id) < 0)
continue;
if (snd_config_get_type(in) != SND_CONFIG_TYPE_COMPOUND)
goto err;
snd_config_for_each(j, jnext, in) {
int ch, k, found;
long schannel;
snd_config_t *jnode = snd_config_iterator_entry(j);
if (snd_config_get_id(jnode, &id) < 0)
continue;
if (safe_strtol(id, &schannel) >= 0)
continue;
ch = (int) snd_pcm_chmap_from_string(id);
if (ch == -1)
goto err;
found = 0;
for (k = 0; k < (int) chmap->channels; k++)
if (ch == (int) chmap->pos[k]) {
found = 1;
break;
}
if (found)
continue;
if (chmap->channels >= MAX_CHMAP_CHANNELS) {
SNDERR("Too many channels in ttable chmap");
goto err;
}
chmap->pos[chmap->channels++] = ch;
}
}
if (chmap->channels == 0) {
free(chmap);
chmap = NULL;
}
*tt_chmap = chmap;
return 0;
err:
*tt_chmap = NULL;
free(chmap);
return -EINVAL;
}
static int find_matching_chmap(snd_pcm_t *spcm, snd_pcm_chmap_t *tt_chmap,
snd_pcm_chmap_t **found_chmap, int *schannels)
{
snd_pcm_chmap_query_t** chmaps = snd_pcm_query_chmaps(spcm);
int i;
*found_chmap = NULL;
if (chmaps == NULL)
return 0; /* chmap API not supported for this slave */
for (i = 0; chmaps[i]; i++) {
unsigned int j, k;
int match = 1;
snd_pcm_chmap_t *c = &chmaps[i]->map;
if (*schannels >= 0 && (int) c->channels != *schannels)
continue;
for (j = 0; j < tt_chmap->channels; j++) {
int found = 0;
unsigned int ch = tt_chmap->pos[j];
for (k = 0; k < c->channels; k++)
if (c->pos[k] == ch) {
found = 1;
break;
}
if (!found) {
match = 0;
break;
}
}
if (match) {
int size = sizeof(snd_pcm_chmap_t) + c->channels * sizeof(unsigned int);
*found_chmap = malloc(size);
if (!*found_chmap) {
snd_pcm_free_chmaps(chmaps);
return -ENOMEM;
}
memcpy(*found_chmap, c, size);
*schannels = c->channels;
break;
}
}
snd_pcm_free_chmaps(chmaps);
if (*found_chmap == NULL) {
SNDERR("Found no matching channel map");
return -EINVAL;
}
return 0;
}
static int route_chmap_init(snd_pcm_t *pcm)
{
int set_map = 0;
snd_pcm_chmap_t *current;
snd_pcm_route_t *route = pcm->private_data;
if (!route->chmap)
return 0;
if (snd_pcm_state(pcm) != SND_PCM_STATE_PREPARED)
return 0;
/* Check if we really need to set the chmap or not.
This is important in case set_chmap is not implemented. */
current = snd_pcm_get_chmap(route->plug.gen.slave);
if (!current)
return -ENOSYS;
if (current->channels != route->chmap->channels)
set_map = 1;
else
set_map = memcmp(current->pos, route->chmap->pos,
current->channels);
free(current);
if (!set_map)
return 0;
return snd_pcm_set_chmap(route->plug.gen.slave, route->chmap);
}
static const snd_pcm_ops_t snd_pcm_route_ops = {
.close = snd_pcm_route_close,
.info = snd_pcm_generic_info,
.hw_refine = snd_pcm_route_hw_refine,
.hw_params = snd_pcm_route_hw_params,
.hw_free = snd_pcm_generic_hw_free,
.sw_params = snd_pcm_generic_sw_params,
.channel_info = snd_pcm_generic_channel_info,
.dump = snd_pcm_route_dump,
.nonblock = snd_pcm_generic_nonblock,
.async = snd_pcm_generic_async,
.mmap = snd_pcm_generic_mmap,
.munmap = snd_pcm_generic_munmap,
.query_chmaps = snd_pcm_route_query_chmaps,
.get_chmap = snd_pcm_route_get_chmap,
.set_chmap = NULL, /* NYI */
};
static int route_load_ttable(snd_pcm_route_params_t *params, snd_pcm_stream_t stream,
unsigned int tt_ssize,
snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_cused, unsigned int tt_sused)
{
unsigned int src_channel, dst_channel;
snd_pcm_route_ttable_dst_t *dptr;
unsigned int sused, dused, smul, dmul;
if (stream == SND_PCM_STREAM_PLAYBACK) {
sused = tt_cused;
dused = tt_sused;
smul = tt_ssize;
dmul = 1;
} else {
sused = tt_sused;
dused = tt_cused;
smul = 1;
dmul = tt_ssize;
}
params->ndsts = dused;
params->nsrcs = sused;
dptr = calloc(dused, sizeof(*params->dsts));
if (!dptr)
return -ENOMEM;
params->dsts = dptr;
for (dst_channel = 0; dst_channel < dused; ++dst_channel) {
snd_pcm_route_ttable_entry_t t = 0;
int att = 0;
int nsrcs = 0;
snd_pcm_route_ttable_src_t srcs[sused];
for (src_channel = 0; src_channel < sused; ++src_channel) {
snd_pcm_route_ttable_entry_t v;
v = ttable[src_channel * smul + dst_channel * dmul];
if (v != 0) {
srcs[nsrcs].channel = src_channel;
#if SND_PCM_PLUGIN_ROUTE_FLOAT
/* Also in user space for non attenuated */
srcs[nsrcs].as_int = (v == SND_PCM_PLUGIN_ROUTE_FULL ? SND_PCM_PLUGIN_ROUTE_RESOLUTION : 0);
srcs[nsrcs].as_float = v;
#else
assert(v >= 0 && v <= SND_PCM_PLUGIN_ROUTE_FULL);
srcs[nsrcs].as_int = v;
#endif
if (v != SND_PCM_PLUGIN_ROUTE_FULL)
att = 1;
t += v;
nsrcs++;
}
}
#if 0
assert(t <= SND_PCM_PLUGIN_ROUTE_FULL);
#endif
dptr->att = att;
dptr->nsrcs = nsrcs;
if (nsrcs == 0)
dptr->func = snd_pcm_route_convert1_zero;
else
dptr->func = snd_pcm_route_convert1_many;
if (nsrcs > 0) {
dptr->srcs = calloc((unsigned int) nsrcs, sizeof(*srcs));
if (!dptr->srcs)
return -ENOMEM;
memcpy(dptr->srcs, srcs, sizeof(*srcs) * nsrcs);
} else
dptr->srcs = 0;
dptr++;
}
return 0;
}
/**
* \brief Creates a new Route & Volume PCM
* \param pcmp Returns created PCM handle
* \param name Name of PCM
* \param sformat Slave format
* \param schannels Slave channels
* \param ttable Attenuation table
* \param tt_ssize Attenuation table - slave size
* \param tt_cused Attenuation table - client used count
* \param tt_sused Attenuation table - slave used count
* \param slave Slave PCM handle
* \param close_slave When set, the slave PCM handle is closed with copy PCM
* \retval zero on success otherwise a negative error code
* \warning Using of this function might be dangerous in the sense
* of compatibility reasons. The prototype might be freely
* changed in future.
*/
int snd_pcm_route_open(snd_pcm_t **pcmp, const char *name,
snd_pcm_format_t sformat, int schannels,
snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_ssize,
unsigned int tt_cused, unsigned int tt_sused,
snd_pcm_t *slave, int close_slave)
{
snd_pcm_t *pcm;
snd_pcm_route_t *route;
int err;
assert(pcmp && slave && ttable);
if (sformat != SND_PCM_FORMAT_UNKNOWN &&
snd_pcm_format_linear(sformat) != 1)
return -EINVAL;
route = calloc(1, sizeof(snd_pcm_route_t));
if (!route) {
return -ENOMEM;
}
snd_pcm_plugin_init(&route->plug);
route->sformat = sformat;
route->schannels = schannels;
route->plug.read = snd_pcm_route_read_areas;
route->plug.write = snd_pcm_route_write_areas;
route->plug.undo_read = snd_pcm_plugin_undo_read_generic;
route->plug.undo_write = snd_pcm_plugin_undo_write_generic;
route->plug.gen.slave = slave;
route->plug.gen.close_slave = close_slave;
route->plug.init = route_chmap_init;
err = snd_pcm_new(&pcm, SND_PCM_TYPE_ROUTE, name, slave->stream, slave->mode);
if (err < 0) {
free(route);
return err;
}
pcm->ops = &snd_pcm_route_ops;
pcm->fast_ops = &snd_pcm_plugin_fast_ops;
pcm->private_data = route;
pcm->poll_fd = slave->poll_fd;
pcm->poll_events = slave->poll_events;
pcm->tstamp_type = slave->tstamp_type;
snd_pcm_set_hw_ptr(pcm, &route->plug.hw_ptr, -1, 0);
snd_pcm_set_appl_ptr(pcm, &route->plug.appl_ptr, -1, 0);
err = route_load_ttable(&route->params, pcm->stream, tt_ssize, ttable, tt_cused, tt_sused);
if (err < 0) {
snd_pcm_close(pcm);
return err;
}
*pcmp = pcm;
return 0;
}
static int _snd_pcm_route_determine_ttable(snd_config_t *tt,
unsigned int *tt_csize,
unsigned int *tt_ssize,
snd_pcm_chmap_t *chmap)
{
snd_config_iterator_t i, inext;
long csize = 0, ssize = 0;
int err;
assert(tt && tt_csize && tt_ssize);
snd_config_for_each(i, inext, tt) {
snd_config_t *in = snd_config_iterator_entry(i);
snd_config_iterator_t j, jnext;
long cchannel;
const char *id;
if (!snd_config_get_id(in, &id) < 0)
continue;
err = safe_strtol(id, &cchannel);
if (err < 0) {
SNDERR("Invalid client channel: %s", id);
return -EINVAL;
}
if (cchannel + 1 > csize)
csize = cchannel + 1;
if (snd_config_get_type(in) != SND_CONFIG_TYPE_COMPOUND)
return -EINVAL;
snd_config_for_each(j, jnext, in) {
snd_config_t *jnode = snd_config_iterator_entry(j);
long schannel;
const char *id;
if (snd_config_get_id(jnode, &id) < 0)
continue;
err = strtochannel(id, chmap, &schannel, 1);
if (err < 0) {
SNDERR("Invalid slave channel: %s", id);
return -EINVAL;
}
if (schannel + 1 > ssize)
ssize = schannel + 1;
}
}
if (csize == 0 || ssize == 0) {
SNDERR("Invalid null ttable configuration");
return -EINVAL;
}
*tt_csize = csize;
*tt_ssize = ssize;
return 0;
}
/**
* \brief Determine route matrix sizes
* \param tt Configuration root describing route matrix
* \param tt_csize Returned client size in elements
* \param tt_ssize Returned slave size in elements
* \retval zero on success otherwise a negative error code
*/
int snd_pcm_route_determine_ttable(snd_config_t *tt,
unsigned int *tt_csize,
unsigned int *tt_ssize)
{
return _snd_pcm_route_determine_ttable(tt, tt_csize, tt_ssize, NULL);
}
/**
* \brief Load route matrix
* \param tt Configuration root describing route matrix
* \param ttable Returned route matrix
* \param tt_csize Client size in elements
* \param tt_ssize Slave size in elements
* \param tt_cused Used client elements
* \param tt_sused Used slave elements
* \param schannels Slave channels
* \retval zero on success otherwise a negative error code
*/
static int _snd_pcm_route_load_ttable(snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_csize, unsigned int tt_ssize,
unsigned int *tt_cused, unsigned int *tt_sused,
int schannels, snd_pcm_chmap_t *chmap)
{
int cused = -1;
int sused = -1;
snd_config_iterator_t i, inext;
unsigned int k;
int err;
for (k = 0; k < tt_csize * tt_ssize; ++k)
ttable[k] = 0.0;
snd_config_for_each(i, inext, tt) {
snd_config_t *in = snd_config_iterator_entry(i);
snd_config_iterator_t j, jnext;
long cchannel;
const char *id;
if (snd_config_get_id(in, &id) < 0)
continue;
err = safe_strtol(id, &cchannel);
if (err < 0 ||
cchannel < 0 || (unsigned int) cchannel > tt_csize) {
SNDERR("Invalid client channel: %s", id);
return -EINVAL;
}
if (snd_config_get_type(in) != SND_CONFIG_TYPE_COMPOUND)
return -EINVAL;
snd_config_for_each(j, jnext, in) {
snd_config_t *jnode = snd_config_iterator_entry(j);
double value;
int ss;
long *scha = alloca(tt_ssize * sizeof(long));
const char *id;
if (snd_config_get_id(jnode, &id) < 0)
continue;
ss = strtochannel(id, chmap, scha, tt_ssize);
if (ss < 0) {
SNDERR("Invalid slave channel: %s", id);
return -EINVAL;
}
err = snd_config_get_real(jnode, &value);
if (err < 0) {
long v;
err = snd_config_get_integer(jnode, &v);
if (err < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
}
value = v;
}
for (k = 0; (int) k < ss; k++) {
long schannel = scha[k];
if (schannel < 0 || (unsigned int) schannel > tt_ssize ||
(schannels > 0 && schannel >= schannels)) {
SNDERR("Invalid slave channel: %s", id);
return -EINVAL;
}
ttable[cchannel * tt_ssize + schannel] = value;
if (schannel > sused)
sused = schannel;
}
}
if (cchannel > cused)
cused = cchannel;
}
*tt_sused = sused + 1;
*tt_cused = cused + 1;
return 0;
}
/**
* \brief Load route matrix
* \param tt Configuration root describing route matrix
* \param ttable Returned route matrix
* \param tt_csize Client size in elements
* \param tt_ssize Slave size in elements
* \param tt_cused Used client elements
* \param tt_sused Used slave elements
* \param schannels Slave channels
* \retval zero on success otherwise a negative error code
*/
int snd_pcm_route_load_ttable(snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_csize, unsigned int tt_ssize,
unsigned int *tt_cused, unsigned int *tt_sused,
int schannels)
{
return _snd_pcm_route_load_ttable(tt, ttable, tt_csize, tt_ssize,
tt_cused, tt_sused, schannels, NULL);
}
/*! \page pcm_plugins
\section pcm_plugins_route Plugin: Route & Volume
This plugin converts channels and applies volume during the conversion.
The format and rate must match for both of them.
SCHANNEL can be a channel name instead of a number (e g FL, LFE).
If so, a matching channel map will be selected for the slave.
\code
pcm.name {
type route # Route & Volume conversion PCM
slave STR # Slave name
# or
slave { # Slave definition
pcm STR # Slave PCM name
# or
pcm { } # Slave PCM definition
[format STR] # Slave format
[channels INT] # Slave channels
}
ttable { # Transfer table (bi-dimensional compound of cchannels * schannels numbers)
CCHANNEL {
SCHANNEL REAL # route value (0.0 - 1.0)
}
}
}
\endcode
\subsection pcm_plugins_route_funcref Function reference
<UL>
<LI>snd_pcm_route_open()
<LI>_snd_pcm_route_open()
</UL>
*/
/**
* \brief Creates a new Route & Volume PCM
* \param pcmp Returns created PCM handle
* \param name Name of PCM
* \param root Root configuration node
* \param conf Configuration node with Route & Volume PCM description
* \param stream Stream type
* \param mode Stream mode
* \retval zero on success otherwise a negative error code
* \warning Using of this function might be dangerous in the sense
* of compatibility reasons. The prototype might be freely
* changed in future.
*/
int _snd_pcm_route_open(snd_pcm_t **pcmp, const char *name,
snd_config_t *root, snd_config_t *conf,
snd_pcm_stream_t stream, int mode)
{
snd_config_iterator_t i, next;
int err;
snd_pcm_t *spcm;
snd_config_t *slave = NULL, *sconf;
snd_pcm_chmap_t *tt_chmap = NULL, *chmap = NULL;
snd_pcm_format_t sformat = SND_PCM_FORMAT_UNKNOWN;
int schannels = -1;
snd_config_t *tt = NULL;
snd_pcm_route_ttable_entry_t *ttable = NULL;
unsigned int csize, ssize;
unsigned int cused, sused;
snd_config_for_each(i, next, conf) {
snd_config_t *n = snd_config_iterator_entry(i);
const char *id;
if (snd_config_get_id(n, &id) < 0)
continue;
if (snd_pcm_conf_generic_id(id))
continue;
if (strcmp(id, "slave") == 0) {
slave = n;
continue;
}
if (strcmp(id, "ttable") == 0) {
if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
}
tt = n;
continue;
}
SNDERR("Unknown field %s", id);
return -EINVAL;
}
if (!slave) {
SNDERR("slave is not defined");
return -EINVAL;
}
if (!tt) {
SNDERR("ttable is not defined");
return -EINVAL;
}
err = snd_pcm_slave_conf(root, slave, &sconf, 2,
SND_PCM_HW_PARAM_FORMAT, 0, &sformat,
SND_PCM_HW_PARAM_CHANNELS, 0, &schannels);
if (err < 0)
return err;
if (sformat != SND_PCM_FORMAT_UNKNOWN &&
snd_pcm_format_linear(sformat) != 1) {
snd_config_delete(sconf);
SNDERR("slave format is not linear");
return -EINVAL;
}
err = determine_chmap(tt, &tt_chmap);
if (err < 0) {
free(ttable);
return err;
}
err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode, conf);
snd_config_delete(sconf);
if (err < 0) {
free(tt_chmap);
free(ttable);
return err;
}
if (tt_chmap) {
err = find_matching_chmap(spcm, tt_chmap, &chmap, &schannels);
free(tt_chmap);
if (err < 0) {
snd_pcm_close(spcm);
return err;
}
}
err = _snd_pcm_route_determine_ttable(tt, &csize, &ssize, chmap);
if (err < 0) {
free(chmap);
snd_pcm_close(spcm);
return err;
}
ttable = malloc(csize * ssize * sizeof(snd_pcm_route_ttable_entry_t));
if (ttable == NULL) {
free(chmap);
snd_pcm_close(spcm);
return -ENOMEM;
}
err = _snd_pcm_route_load_ttable(tt, ttable, csize, ssize,
&cused, &sused, schannels, chmap);
if (err < 0) {
free(chmap);
free(ttable);
snd_pcm_close(spcm);
return err;
}
err = snd_pcm_route_open(pcmp, name, sformat, schannels,
ttable, ssize,
cused, sused,
spcm, 1);
free(ttable);
if (err < 0) {
free(chmap);
snd_pcm_close(spcm);
} else {
((snd_pcm_route_t*) (*pcmp)->private_data)->chmap = chmap;
}
return err;
}
#ifndef DOC_HIDDEN
SND_DLSYM_BUILD_VERSION(_snd_pcm_route_open, SND_PCM_DLSYM_VERSION);
#endif