int main() {
int val;
printf("ALSA library version: %s\n", SND_LIB_VERSION_STR);
printf("PCM stream types:\n");
for (val = 0; val <= SND_PCM_STREAM_LAST; val++) {
printf(" %s\n", snd_pcm_stream_name((snd_pcm_stream_t)val));
}
printf("PCM access types:\n");
for (val = 0; val <= SND_PCM_ACCESS_LAST; val++) {
printf(" %s\n", snd_pcm_access_name((snd_pcm_access_t)val));
}
printf("PCM formats:\n");
for (val = 0; val <= SND_PCM_STREAM_LAST; val++) {
if (snd_pcm_format_name((snd_pcm_format_t)val) != NULL) {
printf(" %s (%s)\n",
snd_pcm_format_name((snd_pcm_format_t)val),
snd_pcm_format_description((snd_pcm_format_t)val));
}
}
printf("\nPCM subformats:\n");
for (val = 0; val <= SND_PCM_SUBFORMAT_LAST; val++) {
printf(" %s (%s)\n", snd_pcm_subformat_name((snd_pcm_subformat_t)val),
snd_pcm_subformat_description((snd_pcm_subformat_t)val));
}
return 0;
}
int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out)
{
snd_output_printf(out, " stream : %s\n",
snd_pcm_stream_name(pcm->stream));
snd_output_printf(out, " access : %s\n",
snd_pcm_access_name(pcm->access));
snd_output_printf(out, " format : %s\n",
snd_pcm_format_name(pcm->format));
snd_output_printf(out, " subformat : %s\n",
snd_pcm_subformat_name(pcm->subformat));
snd_output_printf(out, " channels : %u\n", pcm->channels);
snd_output_printf(out, " rate : %u\n", pcm->rate);
snd_output_printf(out, " exact rate : %g (%u/%u)\n",
(pcm->hw_params.rate_den ?
((double) pcm->hw_params.rate_num / pcm->hw_params.rate_den) : 0.0),
pcm->hw_params.rate_num, pcm->hw_params.rate_den);
snd_output_printf(out, " msbits : %u\n", pcm->hw_params.msbits);
snd_output_printf(out, " buffer_size : %lu\n", pcm->buffer_size);
snd_output_printf(out, " period_size : %lu\n", pcm->period_size);
snd_output_printf(out, " period_time : %u\n", pcm->period_time);
#if 0 /* deprecated */
snd_output_printf(out, " tick_time : %u\n", pcm->tick_time);
#endif
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;
}
static void device_list(snd_pcm_stream_t stream)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
snd_ctl_card_info_alloca(&info);
snd_pcm_info_alloca(&pcminfo);
card = -1;
if (snd_card_next(&card) < 0 || card < 0) {
error(_("no soundcards found..."));
return;
}
printf(_("**** List of %s Hardware Devices ****\n"),
snd_pcm_stream_name(stream));
while (card >= 0) {
char name[32];
sprintf(name, "hw:%d", card);
if ((err = snd_ctl_open(&handle, name, 0)) < 0) {
error("control open (%i): %s", card, snd_strerror(err));
goto next_card;
}
if ((err = snd_ctl_card_info(handle, info)) < 0) {
error("control hardware info (%i): %s", card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
dev = -1;
while (1) {
unsigned int count;
if (snd_ctl_pcm_next_device(handle, &dev)<0)
error("snd_ctl_pcm_next_device");
if (dev < 0)
break;
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if (err != -ENOENT)
error("control digital audio info (%i): %s", card, snd_strerror(err));
continue;
}
printf(_("card %i: [%s,%i] %s [%s], device %i: %s [%s]\n"),
card, name, dev, snd_ctl_card_info_get_id(info), snd_ctl_card_info_get_name(info),
dev,
snd_pcm_info_get_id(pcminfo),
snd_pcm_info_get_name(pcminfo));
count = snd_pcm_info_get_subdevices_count(pcminfo);
printf( _(" Subdevices: %i/%i\n"),
snd_pcm_info_get_subdevices_avail(pcminfo), count);
for (idx = 0; idx < (int)count; idx++) {
snd_pcm_info_set_subdevice(pcminfo, idx);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
error("control digital audio playback info (%i): %s", card, snd_strerror(err));
} else {
printf(_(" Subdevice #%i: %s\n"),
idx, snd_pcm_info_get_subdevice_name(pcminfo));
}
}
}
snd_ctl_close(handle);
next_card:
if (snd_card_next(&card) < 0) {
error("snd_card_next");
break;
}
}
}
