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topology: Add parsing for rates from conf

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In alsa-lib topology parser, rate_min and rate_max are parsed currently.
Add support to parse rates also.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Guneshwor Singh 2017-06-20 09:45:45 +05:30 • committed by Takashi Iwai
parent 89c96ad7fb
commit c550a421a3
3 changed files with 92 additions and 0 deletions
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1
include/topology.h
View file

@ -534,6 +534,7 @@ extern "C" {
* SectionPCMCapabilities."name" {
*
* formats "S24_LE,S16_LE" # Supported formats
* rates "48000" # Supported rates
* rate_min "48000" # Max supported sample rate
* rate_max "48000" # Min supported sample rate
* channels_min "2" # Min number of channels

71
src/topology/pcm.c
View file

@ -20,6 +20,26 @@
#include "list.h"
#include "tplg_local.h"
#define RATE(v) [SND_PCM_RATE_##v] = #v
static const char *const snd_pcm_rate_names[] = {
RATE(5512),
RATE(8000),
RATE(11025),
RATE(16000),
RATE(22050),
RATE(32000),
RATE(44100),
RATE(48000),
RATE(64000),
RATE(88200),
RATE(96000),
RATE(176400),
RATE(192000),
RATE(CONTINUOUS),
RATE(KNOT),
};
struct tplg_elem *lookup_pcm_dai_stream(struct list_head *base, const char* id)
{
struct list_head *pos;
@ -309,6 +329,42 @@ static int split_format(struct snd_soc_tplg_stream_caps *caps, char *str)
return 0;
}
static int get_rate_value(const char* name)
{
int rate;
for (rate = 0; rate <= SND_PCM_RATE_LAST; rate++) {
if (snd_pcm_rate_names[rate] &&
strcasecmp(name, snd_pcm_rate_names[rate]) == 0) {
return rate;
}
}
return SND_PCM_RATE_UNKNOWN;
}
static int split_rate(struct snd_soc_tplg_stream_caps *caps, char *str)
{
char *s = NULL;
snd_pcm_rates_t rate;
int i = 0;
s = strtok(str, ",");
while (s) {
rate = get_rate_value(s);
if (rate == SND_PCM_RATE_UNKNOWN) {
SNDERR("error: unsupported stream rate %s\n", s);
return -EINVAL;
}
caps->rates |= 1 << rate;
s = strtok(NULL, ", ");
i++;
}
return 0;
}
/* Parse pcm stream capabilities */
int tplg_parse_stream_caps(snd_tplg_t *tplg,
snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
@ -360,6 +416,21 @@ int tplg_parse_stream_caps(snd_tplg_t *tplg,
continue;
}
if (strcmp(id, "rates") == 0) {
s = strdup(val);
if (!s)
return -ENOMEM;
err = split_rate(sc, s);
free(s);
if (err < 0)
return err;
tplg_dbg("\t\t%s: %s\n", id, val);
continue;
}
if (strcmp(id, "rate_min") == 0) {
sc->rate_min = atoi(val);
tplg_dbg("\t\t%s: %d\n", id, sc->rate_min);

20
src/topology/tplg_local.h
View file

@ -37,6 +37,26 @@
struct tplg_ref;
struct tplg_elem;
typedef enum _snd_pcm_rates {
SND_PCM_RATE_UNKNOWN = -1,
SND_PCM_RATE_5512 = 0,
SND_PCM_RATE_8000,
SND_PCM_RATE_11025,
SND_PCM_RATE_16000,
SND_PCM_RATE_22050,
SND_PCM_RATE_32000,
SND_PCM_RATE_44100,
SND_PCM_RATE_48000,
SND_PCM_RATE_64000,
SND_PCM_RATE_88200,
SND_PCM_RATE_96000,
SND_PCM_RATE_176400,
SND_PCM_RATE_192000,
SND_PCM_RATE_CONTINUOUS = 30,
SND_PCM_RATE_KNOT = 31,
SND_PCM_RATE_LAST = SND_PCM_RATE_KNOT,
} snd_pcm_rates_t;
struct snd_tplg {
/* opaque vendor data */