Add support for bluetooth telephonyguppy_6.99.3guppy/6.99.36.99.3

This adds support for bluetooth telephony.
A big rework in the softmixer internals has been
mandatory, in order to support dynamic streams creation
and deletions.

Bluetooth telephony relies on the recent evolutions
of bluez-alsa, the most important one being the
support of HFP over Ofono. The softmixer opens
PCM ioplugs provided by bluez-alsa.
Bluetooth SCO needs 2 streams, one for listening
and the other for talking. These streams are created
upon requests sent by the hal-manager.
The hal manager subscribes for bluez-alsa events
and request the list of availalble transports.

For each "attach" transaction verb, the softmixer
maintains a list of the all created objects
(sources, sinks, zones, ramps, streams, and more)
Additionnally, it creates a new verb when the attach
succeeds, that verb is typically something like
"sco_XX:XX:XX:XX:XX:XX", and the only supported action
at the present time is {"action":"remove"}, that performs
all the cleanup of the registered objects.

Change-Id: I1b119e6c079e60daf771e63c083a1ef33a39f379
Signed-off-by: Thierry Bultel <thierry.bultel@iot.bzh>

1 files changed, 18 insertions, 5 deletions

diff --git a/plugins/alsa/alsa-plug-vol.c b/plugins/alsa/alsa-plug-vol.c
index ce4627a..67400a5 100644
--- a/plugins/alsa/alsa-plug-vol.c
+++ b/plugins/alsa/alsa-plug-vol.c
@@ -22,16 +22,27 @@
 
 ALSA_PLUG_PROTO(softvol); // stream uses softvol plugin
 
+PUBLIC void AlsaDeleteSoftvol(SoftMixerT *mixer, AlsaPcmCtlT * ctl) {
+
+}
+
 PUBLIC AlsaPcmCtlT *AlsaCreateSoftvol(SoftMixerT *mixer, AlsaStreamAudioT *stream, char* slaveid, AlsaSndCtlT *sndcard, char* ctlName, int max, int open) {
     snd_config_t *streamConfig, *elemConfig, *slaveConfig, *controlConfig,*pcmConfig;
-    AlsaPcmCtlT *pcmVol= calloc(1,sizeof(AlsaPcmCtlT));
+	char *cardid = NULL;
     int error = 0;
-     
-    AFB_ApiInfo(mixer->api, "%s create SOFTVOL on %s", __func__, slaveid);
+	AlsaPcmCtlT *pcmVol = NULL;
 
-    char *cardid = NULL;
-    if (asprintf(&cardid, "softvol-%s", stream->uid) == -1)
+	AFB_ApiDebug(mixer->api, "%s create SOFTVOL on %s", __func__, slaveid);
+	if (asprintf(&cardid, "softvol-%s", stream->uid) == -1) {
+		SOFTMIXER_NOMEM(mixer->api);
         goto OnErrorExit;
+	}
+
+	pcmVol = AlsaPcmCtlNew(mixer, cardid);
+	if (pcmVol == NULL) {
+		SOFTMIXER_NOMEM(mixer->api);
+		goto OnErrorExit;
+	}
 
     pcmVol->cid.cardid = (const char *) cardid;
     
@@ -82,6 +93,8 @@ PUBLIC AlsaPcmCtlT *AlsaCreateSoftvol(SoftMixerT *mixer, AlsaStreamAudioT *strea
         goto OnErrorExit;
     }
     
+	stream->softvolConfig = streamConfig;
+
     // Debug config & pcm
     //AlsaDumpCtlConfig (mixer, "plug-config", pcmConfig, 1);
     AlsaDumpCtlConfig(mixer, "plug-softvol", streamConfig, 1);