Add AudioEncoder::GetTargetBitrate

webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h

Index: webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h
diff --git a/webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h b/webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h
index 870b4ddfb6f16c7e70db8d479194dcdecb088f1b..c8690379c6b79bcad676a73fb8fa4b57f013d9b3 100644
--- a/webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h
+++ b/webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h
@@ -41,6 +41,7 @@ class AudioEncoderPcm : public AudioEncoder {
   size_t MaxEncodedBytes() const override;
   int Num10MsFramesInNextPacket() const override;
   int Max10MsFramesInAPacket() const override;
+  int GetTargetBitrate() const override;
   EncodedInfo EncodeInternal(uint32_t rtp_timestamp,
                              const int16_t* audio,
                              size_t max_encoded_bytes,
@@ -53,6 +54,8 @@ class AudioEncoderPcm : public AudioEncoder {
                              size_t input_len,
                              uint8_t* encoded) = 0;
 
+  virtual int BytesPerSample() const = 0;
+
  private:
   const int sample_rate_hz_;
   const int num_channels_;
@@ -63,7 +66,7 @@ class AudioEncoderPcm : public AudioEncoder {
   uint32_t first_timestamp_in_buffer_;
 };
 
-class AudioEncoderPcmA : public AudioEncoderPcm {
+class AudioEncoderPcmA final : public AudioEncoderPcm {
  public:
   struct Config : public AudioEncoderPcm::Config {
     Config() : AudioEncoderPcm::Config(8) {}
@@ -77,11 +80,13 @@ class AudioEncoderPcmA : public AudioEncoderPcm {
                      size_t input_len,
                      uint8_t* encoded) override;
 
+  int BytesPerSample() const override;
+
  private:
   static const int kSampleRateHz = 8000;
 };
 
-class AudioEncoderPcmU : public AudioEncoderPcm {
+class AudioEncoderPcmU final : public AudioEncoderPcm {
  public:
   struct Config : public AudioEncoderPcm::Config {
     Config() : AudioEncoderPcm::Config(0) {}
@@ -95,6 +100,8 @@ class AudioEncoderPcmU : public AudioEncoderPcm {
                      size_t input_len,
                      uint8_t* encoded) override;
 
+  int BytesPerSample() const override;
+
  private:
   static const int kSampleRateHz = 8000;
 };