Add AudioEncoder::GetTargetBitrate

webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc

Index: webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
diff --git a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
index ed496186469e1a7ccc4d48858fc1635528f6680e..905a7152dd40dda0dc523207d34e0072165a4c00 100644
--- a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
+++ b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
@@ -60,7 +60,7 @@ int AudioEncoderPcm::NumChannels() const {
 }
 
 size_t AudioEncoderPcm::MaxEncodedBytes() const {
-  return full_frame_samples_;
+  return full_frame_samples_ * BytesPerSample();
 }
 
 int AudioEncoderPcm::Num10MsFramesInNextPacket() const {
@@ -71,6 +71,10 @@ int AudioEncoderPcm::Max10MsFramesInAPacket() const {
   return num_10ms_frames_per_packet_;
 }
 
+int AudioEncoderPcm::GetTargetBitrate() const {
+  return 8 * BytesPerSample() * SampleRateHz() * NumChannels();
+}
+
 AudioEncoder::EncodedInfo AudioEncoderPcm::EncodeInternal(
     uint32_t rtp_timestamp,
     const int16_t* audio,
@@ -104,12 +108,20 @@ int16_t AudioEncoderPcmA::EncodeCall(const int16_t* audio,
   return WebRtcG711_EncodeA(audio, static_cast<int16_t>(input_len), encoded);
 }
 
+int AudioEncoderPcmA::BytesPerSample() const {
+  return 1;
+}
+
 int16_t AudioEncoderPcmU::EncodeCall(const int16_t* audio,
                                      size_t input_len,
                                      uint8_t* encoded) {
   return WebRtcG711_EncodeU(audio, static_cast<int16_t>(input_len), encoded);
 }
 
+int AudioEncoderPcmU::BytesPerSample() const {
+  return 1;
+}
+
 namespace {
 template <typename T>
 typename T::Config CreateConfig(const CodecInst& codec_inst) {