Bitrate controller for VideoToolbox encoder.

webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h

Index: webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h
diff --git a/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h b/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h
index 269e0411b2f8e3ed22683721297ec1efb6dadd1d..01c1bddf185a0b3638deb0402bc86cfc6f9e2c61 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h
+++ b/webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h
@@ -13,6 +13,7 @@
 #define WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_ENCODER_H_
 
 #include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
+#include "webrtc/modules/video_coding/include/bitrate_adjuster.h"
 
 #if defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
 
@@ -26,7 +27,8 @@
 
 namespace webrtc {
 
-class H264VideoToolboxEncoder : public H264Encoder {
+class H264VideoToolboxEncoder : public H264Encoder,
+                                public BitrateAdjusterObserver {
  public:
   H264VideoToolboxEncoder();
 
@@ -50,14 +52,26 @@ class H264VideoToolboxEncoder : public H264Encoder {
 
   const char* ImplementationName() const override;
 
+  void OnBitrateAdjusted(uint32_t adjusted_bitrate) override;
+  void OnEncodedFrame(OSStatus status,
+                      VTEncodeInfoFlags info_flags,
+                      CMSampleBufferRef sample_buffer,
+                      CodecSpecificInfo codec_specific_info,
+                      int32_t width,
+                      int32_t height,
+                      int64_t render_time_ms,
+                      uint32_t timestamp);
+
  private:
   int ResetCompressionSession();
   void ConfigureCompressionSession();
   void DestroyCompressionSession();
+  void SetBitrate(uint32_t bitrate_kbit);
 
-  webrtc::EncodedImageCallback* callback_;
+  EncodedImageCallback* callback_;
   VTCompressionSessionRef compression_session_;
-  int32_t bitrate_;  // Bitrate in bits per second.
+  BitrateAdjuster bitrate_adjuster_;
+  uint32_t bitrate_kbit_;
   int32_t width_;
   int32_t height_;
 };  // H264VideoToolboxEncoder