/*
* Reads and decodes configuration info from the specified ALSA card/device.
*/
static int read_alsa_device_config(alsa_device_profile * profile, struct pcm_config * config)
{
ALOGV("usb:audio_hw - read_alsa_device_config(c:%d d:%d t:0x%X)",
profile->card, profile->device, profile->direction);
if (profile->card < 0 || profile->device < 0) {
return -EINVAL;
}
struct pcm_params * alsa_hw_params =
pcm_params_get(profile->card, profile->device, profile->direction);
if (alsa_hw_params == NULL) {
return -EINVAL;
}
profile->min_period_size = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_SIZE);
profile->max_period_size = pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_SIZE);
profile->min_channel_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS);
profile->max_channel_count = pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS);
int ret = 0;
/*
* This Logging will be useful when testing new USB devices.
*/
#ifdef LOG_PCM_PARAMS
log_pcm_params(alsa_hw_params);
#endif
config->channels = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS);
config->rate = pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE);
config->period_size = profile_calc_min_period_size(profile, config->rate);
config->period_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIODS);
config->format = get_pcm_format_for_mask(pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT));
#ifdef LOG_PCM_PARAMS
log_pcm_config(config, "read_alsa_device_config");
#endif
if (config->format == PCM_FORMAT_INVALID) {
ret = -EINVAL;
}
pcm_params_free(alsa_hw_params);
return ret;
}
bool profile_read_device_info(alsa_device_profile* profile)
{
if (!profile_is_initialized(profile)) {
return false;
}
/* let's get some defaults */
read_alsa_device_config(profile, &profile->default_config);
ALOGV("default_config chans:%d rate:%d format:%d count:%d size:%d",
profile->default_config.channels, profile->default_config.rate,
profile->default_config.format, profile->default_config.period_count,
profile->default_config.period_size);
struct pcm_params * alsa_hw_params = pcm_params_get(profile->card,
profile->device,
profile->direction);
if (alsa_hw_params == NULL) {
return false;
}
/* Formats */
struct pcm_mask * format_mask = pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT);
profile_enum_sample_formats(profile, format_mask);
/* Channels */
profile_enum_channel_counts(
profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS),
pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS));
/* Sample Rates */
profile_enum_sample_rates(
profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE),
pcm_params_get_max(alsa_hw_params, PCM_PARAM_RATE));
profile->is_valid = true;
return true;
}
static GstCaps *
gst_tinyalsa_sink_getcaps (GstBaseSink * bsink, GstCaps * filter)
{
GstTinyalsaSink *sink = GST_TINYALSA_SINK (bsink);
GstCaps *caps = NULL;
GValue formats = { 0, };
GValue format = { 0, };
struct pcm_params *params = NULL;
struct pcm_mask *mask;
int rate_min, rate_max, channels_min, channels_max;
guint16 m;
GST_DEBUG_OBJECT (sink, "Querying caps");
GST_OBJECT_LOCK (sink);
if (sink->cached_caps) {
GST_DEBUG_OBJECT (sink, "Returning cached caps");
caps = gst_caps_ref (sink->cached_caps);
goto done;
}
if (sink->pcm) {
/* We can't query the device while it's open, so return current caps */
caps = gst_pad_get_current_caps (GST_BASE_SINK_PAD (bsink));
goto done;
}
params = pcm_params_get (sink->card, sink->device, PCM_OUT);
if (!params) {
GST_ERROR_OBJECT (sink, "Could not get PCM params");
goto done;
}
mask = pcm_params_get_mask (params, PCM_PARAM_FORMAT);
m = (mask->bits[1] << 8) | mask->bits[0];
if (!(m & SNDRV_PCM_FORMAT_ANY)) {
GST_ERROR_OBJECT (sink, "Could not find any supported format");
goto done;
}
caps = gst_caps_new_empty_simple ("audio/x-raw");
g_value_init (&formats, GST_TYPE_LIST);
g_value_init (&format, G_TYPE_STRING);
if (m & (1 << SNDRV_PCM_FORMAT_S8)) {
g_value_set_static_string (&format, "S8");
gst_value_list_prepend_value (&formats, &format);
}
if (m & (1 << SNDRV_PCM_FORMAT_S16_LE)) {
g_value_set_static_string (&format, "S16LE");
gst_value_list_prepend_value (&formats, &format);
}
if (m & (1 << SNDRV_PCM_FORMAT_S24_LE)) {
g_value_set_static_string (&format, "S24_32LE");
gst_value_list_prepend_value (&formats, &format);
}
if (m & (1 << SNDRV_PCM_FORMAT_S32_LE)) {
g_value_set_static_string (&format, "S32LE");
gst_value_list_prepend_value (&formats, &format);
}
gst_caps_set_value (caps, "format", &formats);
g_value_unset (&format);
g_value_unset (&formats);
/* This is a bit of a lie, since the device likely only supports some
* standard rates in this range. We should probably filter the range to
* those, standard audio rates but even that isn't guaranteed to be accurate.
*/
rate_min = pcm_params_get_min (params, PCM_PARAM_RATE);
rate_max = pcm_params_get_max (params, PCM_PARAM_RATE);
if (rate_min == rate_max)
gst_caps_set_simple (caps, "rate", G_TYPE_INT, rate_min, NULL);
else
gst_caps_set_simple (caps, "rate", GST_TYPE_INT_RANGE, rate_min, rate_max,
NULL);
channels_min = pcm_params_get_min (params, PCM_PARAM_CHANNELS);
channels_max = pcm_params_get_max (params, PCM_PARAM_CHANNELS);
if (channels_min == channels_max)
gst_caps_set_simple (caps, "channels", G_TYPE_INT, channels_min, NULL);
else
gst_caps_set_simple (caps, "channels", GST_TYPE_INT_RANGE, channels_min,
channels_max, NULL);
gst_caps_replace (&sink->cached_caps, caps);
done:
GST_OBJECT_UNLOCK (sink);
GST_DEBUG_OBJECT (sink, "Got caps %" GST_PTR_FORMAT, caps);
if (caps && filter) {
GstCaps *intersection =
gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = intersection;
}
if (params)
pcm_params_free (params);
return caps;
}
int main(int argc, char **argv)
{
unsigned int device = 0;
unsigned int card = 0;
int i;
if (argc < 3) {
fprintf(stderr, "Usage: %s -D card -d device\n", argv[0]);
return 1;
}
/* parse command line arguments */
argv += 1;
while (*argv) {
if (strcmp(*argv, "-D") == 0) {
argv++;
if (*argv)
card = atoi(*argv);
}
if (strcmp(*argv, "-d") == 0) {
argv++;
if (*argv)
device = atoi(*argv);
}
if (*argv)
argv++;
}
printf("Info for card %u, device %u:\n", card, device);
for (i = 0; i < 2; i++) {
struct pcm_params *params;
struct pcm_mask *m;
unsigned int min;
unsigned int max;
printf("\nPCM %s:\n", i == 0 ? "out" : "in");
params = pcm_params_get(card, device, i == 0 ? PCM_OUT : PCM_IN);
if (params == NULL) {
printf("Device does not exist.\n");
continue;
}
m = pcm_params_get_mask(params, PCM_PARAM_ACCESS);
if (m) { /* bitmask, refer to SNDRV_PCM_ACCESS_*, generally interleaved */
printf(" Access:\t%#08x\n", m->bits[0]);
}
m = pcm_params_get_mask(params, PCM_PARAM_FORMAT);
if (m) { /* bitmask, refer to: SNDRV_PCM_FORMAT_* */
unsigned j, k, count = 0;
const unsigned bitcount = sizeof(m->bits[0]) * 8;
/* we only check first two format masks (out of 8) - others are zero. */
printf(" Format[0]:\t%#08x\n", m->bits[0]);
printf(" Format[1]:\t%#08x\n", m->bits[1]);
/* print friendly format names, if they exist */
for (k = 0; k < 2; ++k) {
for (j = 0; j < bitcount; ++j) {
const char *name;
if (m->bits[k] & (1 << j)) {
name = pcm_get_format_name(j + k*bitcount);
if (name) {
if (count++ == 0) {
printf(" Format Name:\t");
} else {
printf (", ");
}
printf("%s", name);
}
}
}
}
if (count) {
printf("\n");
}
}
m = pcm_params_get_mask(params, PCM_PARAM_SUBFORMAT);
if (m) { /* bitmask, should be 1: SNDRV_PCM_SUBFORMAT_STD */
printf(" Subformat:\t%#08x\n", m->bits[0]);
}
min = pcm_params_get_min(params, PCM_PARAM_RATE);
max = pcm_params_get_max(params, PCM_PARAM_RATE);
printf(" Rate:\tmin=%uHz\tmax=%uHz\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_CHANNELS);
max = pcm_params_get_max(params, PCM_PARAM_CHANNELS);
printf(" Channels:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS);
max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS);
printf(" Sample bits:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE);
max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE);
printf(" Period size:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_PERIODS);
max = pcm_params_get_max(params, PCM_PARAM_PERIODS);
printf("Period count:\tmin=%u\t\tmax=%u\n", min, max);
pcm_params_free(params);
}
return 0;
}