Added audio bit rate support

api/iOS/VCSimpleSession.h

@@ -141,6 +141,8 @@ typedef NS_ENUM(NSInteger, VCFilter) {
 
 - (void) endRtmpSession;
 
+- (void) setAudioBitRate:(float)bitRate;
+
 - (void) getCameraPreviewLayer: (AVCaptureVideoPreviewLayer**) previewLayer;
 
 /*!

api/iOS/VCSimpleSession.mm

@@ -130,6 +130,7 @@ @interface VCSimpleSession()
     float  _videoZoomFactor;
     int    _audioChannelCount;
     float  _audioSampleRate;
+    float  _audioBitRate;
     float  _micGain;
 
     VCCameraState _cameraState;
@@ -329,6 +330,18 @@ - (void) setMicGain:(float)micGain
         _micGain = micGain;
     }
 }
+- (void)
+setAudioBitRate:(float)bitRate
+{
+  if(m_audioMixer) {
+    m_audioMixer->setBitsPerChannel(bitRate);
+  }
+}
+- (float)
+audioBitRate
+{
+  return _audioBitRate;
+}
 - (float) micGain
 {
     return _micGain;

mixers/GenericAudioMixer.cpp

@@ -396,7 +396,11 @@ namespace videocore {
     {
         m_outFrequencyInHz = frequencyInHz;
     }
-
+    void
+    GenericAudioMixer::setBitsPerChannel(float bitRate)
+    {
+      m_outBitsPerChannel = bitRate;
+    }
     void
     GenericAudioMixer::mixThread()
     {

mixers/GenericAudioMixer.h

@@ -112,6 +112,9 @@ namespace videocore {
 
         /*! IAudioMixer::setFrequencyInHz */
         void setFrequencyInHz(float frequencyInHz);
+
+        /*! IAudioMixer::setBitsPerChannel */
+        void setBitsPerChannel(float bitRate);
 
         /*! IAudioMixer::setMinimumBufferDuration */
         virtual void setMinimumBufferDuration(const double duration) ;

mixers/IAudioMixer.hpp

@@ -82,7 +82,14 @@ namespace videocore {
          *  \param frequencyInHz  The audio sample frequency in Hz.
          */
         virtual void setFrequencyInHz(float frequencyInHz) = 0;
-
+
+        /*!
+         *  Set the bits ber channel count.
+         *
+         *  \param frequencyInHz  The audio bit rate.
+         */
+        virtual void setBitsPerChannel(float bitRate) = 0;
+
         /*!
          *  Set the amount of time to buffer before emitting mixed samples.
          *