[alsa-devel] [RESEND] topology: Add parsing for rates from conf
Guneshwor Singh
guneshwor.o.singh at intel.com
Tue Jun 20 06:15:45 CEST 2017
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 at intel.com>
---
include/topology.h | 1 +
src/topology/pcm.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++
src/topology/tplg_local.h | 20 +++++++++++++
3 files changed, 92 insertions(+)
diff --git a/include/topology.h b/include/topology.h
index ccb3a004..42d23762 100644
--- a/include/topology.h
+++ b/include/topology.h
@@ -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
diff --git a/src/topology/pcm.c b/src/topology/pcm.c
index 0f4deb4f..bb63142e 100644
--- a/src/topology/pcm.c
+++ b/src/topology/pcm.c
@@ -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);
diff --git a/src/topology/tplg_local.h b/src/topology/tplg_local.h
index 60af0177..af599145 100644
--- a/src/topology/tplg_local.h
+++ b/src/topology/tplg_local.h
@@ -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 */
--
2.13.0
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