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authorManuel Bachmann <manuel.bachmann@iot.bzh>2015-12-22 15:17:37 +0100
committerManuel Bachmann <manuel.bachmann@iot.bzh>2015-12-22 15:17:37 +0100
commit6f2913ab5e366e8f3df12a7df11a85b7b6574e2c (patch)
tree60bb00a0b8fe0dadefbdbeb9c01445b5b645d7f3
parent1b238baa74d36f144581deee5f3a1834d1d445bb (diff)
Audio API: manage multiple-channel volume
You can now set the volume for multiple channels independantly by using the "value=<1>,<2>..." syntax. Signed-off-by: Manuel Bachmann <manuel.bachmann@iot.bzh>
-rw-r--r--plugins/audio/audio-alsa.c38
-rw-r--r--plugins/audio/audio-alsa.h2
-rw-r--r--plugins/audio/audio-api.c45
-rw-r--r--plugins/audio/audio-api.h4
4 files changed, 68 insertions, 21 deletions
diff --git a/plugins/audio/audio-alsa.c b/plugins/audio/audio-alsa.c
index 8e56e52d..1f54f244 100644
--- a/plugins/audio/audio-alsa.c
+++ b/plugins/audio/audio-alsa.c
@@ -19,6 +19,17 @@
#include "audio-api.h"
#include "audio-alsa.h"
+snd_mixer_selem_channel_id_t SCHANNELS[8] = {
+ SND_MIXER_SCHN_FRONT_LEFT,
+ SND_MIXER_SCHN_FRONT_RIGHT,
+ SND_MIXER_SCHN_FRONT_CENTER,
+ SND_MIXER_SCHN_REAR_LEFT,
+ SND_MIXER_SCHN_REAR_RIGHT,
+ SND_MIXER_SCHN_REAR_CENTER,
+ SND_MIXER_SCHN_SIDE_LEFT,
+ SND_MIXER_SCHN_SIDE_RIGHT
+};
+
PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
snd_pcm_t *dev;
@@ -28,7 +39,7 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
snd_mixer_elem_t *mixer_elm;
unsigned int rate = 22050;
long vol, vol_min, vol_max;
- int num;
+ int num, i;
if (snd_pcm_open (&dev, name, SND_PCM_STREAM_PLAYBACK, 0) < 0)
return 0;
@@ -105,7 +116,8 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
dev_ctx[num]->thr_finished = 0;
/* make the client context aware of current card state */
- ctx->volume = _alsa_get_volume (num);
+ for (i = 0; i < 8; i++)
+ ctx->volume[i] = _alsa_get_volume (num, i);
ctx->mute = _alsa_get_mute (num);
ctx->idx = num;
@@ -155,22 +167,32 @@ PUBLIC void _alsa_stop (unsigned int num) {
pthread_join(dev_ctx[num]->thr, NULL);
}
-PUBLIC unsigned int _alsa_get_volume (unsigned int num) {
+PUBLIC int _alsa_get_volume (unsigned int num, unsigned int channel) {
if (!dev_ctx || !dev_ctx[num] || !dev_ctx[num]->mixer_elm)
return;
- snd_mixer_selem_get_playback_volume (dev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &dev_ctx[num]->vol);
+ snd_mixer_selem_get_playback_volume (dev_ctx[num]->mixer_elm, SCHANNELS[channel], &dev_ctx[num]->vol);
- return (unsigned int)(dev_ctx[num]->vol*100)/dev_ctx[num]->vol_max;
+ return (int)(dev_ctx[num]->vol*100)/dev_ctx[num]->vol_max;
}
-PUBLIC unsigned int _alsa_set_volume (unsigned int num, unsigned int vol) {
+PUBLIC void _alsa_set_volume (unsigned int num, unsigned int channel, int vol) {
- if (!dev_ctx || !dev_ctx[num] || !dev_ctx[num]->mixer_elm || vol > 100)
+ if (!dev_ctx || !dev_ctx[num] || !dev_ctx[num]->mixer_elm ||
+ 0 > vol > 100)
return;
- snd_mixer_selem_set_playback_volume_all (dev_ctx[num]->mixer_elm, (vol*dev_ctx[num]->vol_max)/100);
+ snd_mixer_selem_set_playback_volume (dev_ctx[num]->mixer_elm, SCHANNELS[channel], (vol*dev_ctx[num]->vol_max)/100);
+
+}
+
+PUBLIC void _alsa_set_volume_all (unsigned int num, int vol) {
+
+ if (!dev_ctx || !dev_ctx[num] || !dev_ctx[num]->mixer_elm ||
+ 0 > vol > 100)
+
+ snd_mixer_selem_set_playback_volume_all (dev_ctx[num]->mixer_elm, (vol*dev_ctx[num]->vol_max)/100);
}
PUBLIC unsigned char _alsa_get_mute (unsigned int num) {
diff --git a/plugins/audio/audio-alsa.h b/plugins/audio/audio-alsa.h
index 56b4f55f..85545d57 100644
--- a/plugins/audio/audio-alsa.h
+++ b/plugins/audio/audio-alsa.h
@@ -39,7 +39,7 @@ struct dev_ctx {
};
STATIC void* _play_thread_fn (void *);
-PUBLIC unsigned int _alsa_get_volume (unsigned int);
+PUBLIC int _alsa_get_volume (unsigned int, unsigned int);
PUBLIC unsigned char _alsa_get_mute (unsigned int);
static struct dev_ctx **dev_ctx = NULL;
diff --git a/plugins/audio/audio-api.c b/plugins/audio/audio-api.c
index 60a5a962..915f8c6e 100644
--- a/plugins/audio/audio-api.c
+++ b/plugins/audio/audio-api.c
@@ -26,10 +26,12 @@
STATIC audioCtxHandleT* initAudioCtx () {
audioCtxHandleT *ctx;
+ int i;
ctx = malloc (sizeof(audioCtxHandleT));
ctx->idx = -1;
- ctx->volume = 25;
+ for (i = 0; i < 8; i++)
+ ctx->volume[i] = 25;
ctx->channels = 2;
ctx->mute = 0;
ctx->is_playing = 0;
@@ -82,28 +84,51 @@ STATIC json_object* volume (AFB_request *request) { /* AFB_SESSION_CHECK */
audioCtxHandleT *ctx = (audioCtxHandleT*)request->client->ctx;
const char *value = getQueryValue (request, "value");
json_object *jresp;
- int volume;
+ int volume[8], i;
+ char *volume_i;
char volume_str[256];
+ int len_str = 0;
/* no "?value=" parameter : return current state */
if (!value) {
- ctx->volume = _alsa_get_volume (ctx->idx);
- snprintf (volume_str, sizeof(volume_str), "%d", ctx->volume);
+ for (i = 0; i < 8; i++) {
+ ctx->volume[i] = _alsa_get_volume (ctx->idx, i);
+ snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+ len_str = strlen(volume_str);
+ }
jresp = json_object_new_object();
json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
}
/* "?value=" parameter, set volume */
else {
- volume = atoi (value);
- if (100 < volume < 0) {
+ volume_i = strdup (value);
+ volume_i = strtok (volume_i, ",");
+ volume[0] = atoi (volume_i);
+
+ if (100 < volume[0] < 0) {
+ free (volume_i);
request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
return (jsonNewMessage (AFB_FAIL, "Volume must be between 0 and 100"));
}
- ctx->volume = volume;
- _alsa_set_volume (ctx->idx, ctx->volume);
-
- snprintf (volume_str, sizeof(volume_str), "%d", ctx->volume);
+ ctx->volume[0] = volume[0];
+ _alsa_set_volume (ctx->idx, 0, ctx->volume[0]);
+ snprintf (volume_str, sizeof(volume_str), "%d,", ctx->volume[0]);
+
+ for (i = 1; i < 8; i++) {
+ volume_i = strtok (NULL, ",");
+ /* if there is only one value, set all channels to this one */
+ if (!volume_i && i == 1)
+ _alsa_set_volume_all (ctx->idx, ctx->volume[0]);
+ if (!volume_i || 100 < atoi(volume_i) < 0) {
+ ctx->volume[i] = _alsa_get_volume (ctx->idx, i);
+ } else {
+ ctx->volume[i] = atoi(volume_i);
+ _alsa_set_volume (ctx->idx, i, ctx->volume[i]);
+ }
+ len_str = strlen(volume_str);
+ snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+ }
jresp = json_object_new_object();
json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
}
diff --git a/plugins/audio/audio-api.h b/plugins/audio/audio-api.h
index 12f70a8e..b6669ec9 100644
--- a/plugins/audio/audio-api.h
+++ b/plugins/audio/audio-api.h
@@ -36,10 +36,10 @@ typedef struct {
typedef struct {
audioDevT *radio; /* pointer to client audio card */
int idx; /* audio card index within global array */
- unsigned int volume; /* audio volume : 0-100 */
+ int volume[8]; /* audio volume (8 channels) : 0-100 */
unsigned int channels; /* audio channels : 1(mono)/2(stereo)... */
unsigned char mute; /* audio muted : 0(false)/1(true) */
- unsigned char is_playing; /* audio is playing: 0(false)/1(true) */
+ unsigned char is_playing; /* audio is playing: 0(false)/1(true) */
} audioCtxHandleT;