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/*
* channel mapping API test program
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <getopt.h>
#include "../include/asoundlib.h"
static void usage(void)
{
printf("usage: chmap [options] query\n"
" chmap [options] get\n"
" chmap [options] set CH0 CH1 CH2...\n"
"options:\n"
" -D device Specify PCM device to handle\n"
" -f format PCM format\n"
" -c channels Channels\n"
" -r rate Sample rate\n");
}
static void print_channels(const snd_pcm_chmap_t *map)
{
char tmp[128];
if (snd_pcm_chmap_print(map, sizeof(tmp), tmp) > 0)
printf(" %s\n", tmp);
}
static int query_chmaps(snd_pcm_t *pcm)
{
snd_pcm_chmap_query_t **maps = snd_pcm_query_chmaps(pcm);
snd_pcm_chmap_query_t **p, *v;
if (!maps) {
printf("Cannot query maps\n");
return 1;
}
for (p = maps; (v = *p) != NULL; p++) {
printf("Type = %s, Channels = %d\n",
snd_pcm_chmap_type_name(v->type),
v->map.channels);
print_channels(&v->map);
}
snd_pcm_free_chmaps(maps);
return 0;
}
static int setup_pcm(snd_pcm_t *pcm, int format, int channels, int rate)
{
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(¶ms);
if (snd_pcm_hw_params_any(pcm, params) < 0) {
printf("Cannot init hw_params\n");
return -1;
}
if (format != SND_PCM_FORMAT_UNKNOWN) {
if (snd_pcm_hw_params_set_format(pcm, params, format) < 0) {
printf("Cannot set format %s\n",
snd_pcm_format_name(format));
return -1;
}
}
if (channels > 0) {
if (snd_pcm_hw_params_set_channels(pcm, params, channels) < 0) {
printf("Cannot set channels %d\n", channels);
return -1;
}
}
if (rate > 0) {
if (snd_pcm_hw_params_set_rate_near(pcm, params, (unsigned int *)&rate, 0) < 0) {
printf("Cannot set rate %d\n", rate);
return -1;
}
}
if (snd_pcm_hw_params(pcm, params) < 0) {
printf("Cannot set hw_params\n");
return -1;
}
return 0;
}
static int get_chmap(snd_pcm_t *pcm, int format, int channels, int rate)
{
snd_pcm_chmap_t *map;
if (setup_pcm(pcm, format, channels, rate))
return 1;
map = snd_pcm_get_chmap(pcm);
if (!map) {
printf("Cannot get chmap\n");
return 1;
}
printf("Channels = %d\n", map->channels);
print_channels(map);
free(map);
return 0;
}
static int set_chmap(snd_pcm_t *pcm, int format, int channels, int rate,
int nargs, char **arg)
{
int i;
snd_pcm_chmap_t *map;
if (channels && channels != nargs) {
printf("Inconsistent channels %d vs %d\n", channels, nargs);
return 1;
}
if (!channels) {
if (!nargs) {
printf("No channels are given\n");
return 1;
}
channels = nargs;
}
if (setup_pcm(pcm, format, channels, rate))
return 1;
map = malloc(sizeof(int) * (channels + 1));
if (!map) {
printf("cannot malloc\n");
return 1;
}
map->channels = channels;
for (i = 0; i < channels; i++) {
int val = snd_pcm_chmap_from_string(arg[i]);
if (val < 0)
val = SND_CHMAP_UNKNOWN;
map->pos[i] = val;
}
if (snd_pcm_set_chmap(pcm, map) < 0) {
printf("Cannot set chmap\n");
return 1;
}
free(map);
map = snd_pcm_get_chmap(pcm);
if (!map) {
printf("Cannot get chmap\n");
return 1;
}
printf("Get channels = %d\n", map->channels);
print_channels(map);
free(map);
return 0;
}
int main(int argc, char **argv)
{
char *device = NULL;
int stream = SND_PCM_STREAM_PLAYBACK;
int format = SND_PCM_FORMAT_UNKNOWN;
int channels = 0;
int rate = 0;
snd_pcm_t *pcm;
int c;
while ((c = getopt(argc, argv, "D:s:f:c:r:")) != -1) {
switch (c) {
case 'D':
device = optarg;
break;
case 's':
if (*optarg == 'c' || *optarg == 'C')
stream = SND_PCM_STREAM_CAPTURE;
else
stream = SND_PCM_STREAM_PLAYBACK;
break;
case 'f':
format = snd_pcm_format_value(optarg);
break;
case 'c':
channels = atoi(optarg);
break;
case 'r':
rate = atoi(optarg);
break;
default:
usage();
return 1;
}
}
if (argc <= optind) {
usage();
return 1;
}
if (!device) {
printf("No device is specified\n");
return 1;
}
if (snd_pcm_open(&pcm, device, stream, SND_PCM_NONBLOCK) < 0) {
printf("Cannot open PCM stream %s for %s\n", device,
snd_pcm_stream_name(stream));
return 1;
}
switch (*argv[optind]) {
case 'q':
return query_chmaps(pcm);
case 'g':
return get_chmap(pcm, format, channels, rate);
case 's':
return set_chmap(pcm, format, channels, rate,
argc - optind - 1, argv + optind + 1);
}
usage();
return 1;
}
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