add framesize to codec, independant from audiolayer (#1143)

sflphone-common/src/audio/codecs/alaw.cpp

@@ -28,6 +28,7 @@ public:
  	: AudioCodec(payload, "PCMA")
 	{
   		_clockRate = 8000;
+                _frameSize = 160; // 20 ms at 8kHz
   		_channel   = 1;
 		_bitrate = 64;
 		_bandwidth = 80;

sflphone-common/src/audio/codecs/celtcodec.cpp

@@ -30,7 +30,7 @@ class Celt : public AudioCodec{
               _celt_frame_size(128)
     {
         _clockRate = 44100;
-        _frameSize = 512;
+        _frameSize = 512; // fixed frameSize, TODO: support 64 to 512 frame size
         _channel = 1;
         _bitrate = 0;
         _bandwidth = 0;

sflphone-common/src/audio/codecs/speexcodec_nb.cpp

@@ -36,6 +36,7 @@ class Speex : public AudioCodec{
             _preprocess_state()
     {
         _clockRate = 8000;
+        _frameSize = 160; // 20 ms at 8kHz
         _channel = 1;
         _bitrate = 0;
         _bandwidth = 0; 

sflphone-common/src/audio/codecs/speexcodec_wb.cpp

@@ -36,6 +36,7 @@ class Speex : public AudioCodec{
             _preprocess_state()
     {
         _clockRate = 16000;
+        _frameSize = 320; // 20 ms at 16 kHz
         _channel = 1;
         _bitrate = 0;
         _bandwidth = 0; 

sflphone-common/src/audio/codecs/ulaw.cpp

@@ -30,6 +30,7 @@ public:
  	: AudioCodec(payload, "PCMU")
 	{
   		_clockRate = 8000;
+                _frameSize = 160; // 20 ms at 8kHz
   		_channel   = 1;
 		_bitrate =  64; 
 		_bandwidth = 80;