Define EncodedVideoSource and RtcCapturedEncodingVideoCapturer.

content/renderer/media/rtc_encoding_video_capturer.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_MEDIA_RTC_ENCODING_VIDEO_CAPTURER_H_
+#define CONTENT_RENDERER_MEDIA_RTC_ENCODING_VIDEO_CAPTURER_H_
+
+#include "base/memory/ref_counted.h"
+#include "media/video/encoded_video_source.h"
+#include "media/video/video_encode_types.h"
+#include "third_party/libjingle/source/talk/media/webrtc/webrtcvie.h"
+
+namespace content {
+
+// Class to represent an encoding capable video capture interface for the
+// WebRTC component. This class expects to be registered as an encoder with
+// an internal source to the WebRTC stack and will not be able to function as
+// an encoder for uncompressed video frames.
+class RtcEncodingVideoCapturer : public webrtc::VideoEncoder {
+ public:
+  RtcEncodingVideoCapturer(media::EncodedVideoSource* encoded_video_source,
+                           webrtc::VideoCodecType codec_type);
+  virtual ~RtcEncodingVideoCapturer();
+
+  // webrtc::VideoEncoder implementation.
+  virtual int32_t InitEncode(const webrtc::VideoCodec* codecSettings,
+                             int32_t numberOfCores,
+                             uint32_t maxPayloadSize) OVERRIDE;
+  virtual int32_t Encode(
+      const webrtc::I420VideoFrame& /* inputImage */,
+      const webrtc::CodecSpecificInfo* codecSpecificInfo,
+      const std::vector<webrtc::VideoFrameType>* frame_types) OVERRIDE;
+  virtual int32_t RegisterEncodeCompleteCallback(
+      webrtc::EncodedImageCallback* callback) OVERRIDE;
+  virtual int32_t Release() OVERRIDE;
+  virtual int32_t SetChannelParameters(uint32_t /* packetLoss */,
+                                       int rtt_in_ms) OVERRIDE;
+  virtual int32_t SetRates(uint32_t newBitRate,
+                           uint32_t frameRate) OVERRIDE;
+ private:
+  // Forward declaration for private implementation to represent the
+  // encoded video source client;
+  class EncodedVideoSourceClient;
+  scoped_ptr<EncodedVideoSourceClient> encoded_video_source_client_;
+
+  // Pointer to the underlying EncodedVideoSource object. It is guaranteed to
+  // outlive the RtcEncodingVideoCapturer.
+  media::EncodedVideoSource* encoded_video_source_;
+  webrtc::VideoCodecType rtc_codec_type_;
+
+  DISALLOW_COPY_AND_ASSIGN(RtcEncodingVideoCapturer);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_RTC_ENCODING_VIDEO_CAPTURER_H_