1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_ENCODER_H_ 6 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_ENCODER_H_ 7 8 #include <vector> 9 10 #include "base/memory/ref_counted.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/weak_ptr.h" 13 #include "base/threading/thread_checker.h" 14 #include "base/time/time.h" 15 #include "content/common/content_export.h" 16 #include "media/base/video_decoder_config.h" 17 #include "third_party/webrtc/modules/video_coding/codecs/interface/video_codec_interface.h" 18 #include "ui/gfx/size.h" 19 20 namespace base { 21 22 class MessageLoopProxy; 23 24 } // namespace base 25 26 namespace content { 27 28 class RendererGpuVideoAcceleratorFactories; 29 30 // RTCVideoEncoder uses a media::VideoEncodeAccelerator to implement a 31 // webrtc::VideoEncoder class for WebRTC. Internally, VEA methods are 32 // trampolined to a private RTCVideoEncoder::Impl instance. The Impl class runs 33 // on the worker thread queried from the |gpu_factories_|, which is presently 34 // the media thread. RTCVideoEncoder itself is run and destroyed on the thread 35 // it is constructed on, which is presently the libjingle worker thread. 36 // Callbacks from the Impl due to its VEA::Client notifications are also posted 37 // back to RTCVideoEncoder on this thread. 38 class CONTENT_EXPORT RTCVideoEncoder NON_EXPORTED_BASE(public webrtc::VideoEncoder)39 : NON_EXPORTED_BASE(public webrtc::VideoEncoder) { 40 public: 41 RTCVideoEncoder( 42 webrtc::VideoCodecType type, 43 media::VideoCodecProfile profile, 44 const scoped_refptr<RendererGpuVideoAcceleratorFactories>& gpu_factories); 45 virtual ~RTCVideoEncoder(); 46 47 // webrtc::VideoEncoder implementation. Tasks are posted to |impl_| using the 48 // appropriate VEA methods. 49 virtual int32_t InitEncode(const webrtc::VideoCodec* codec_settings, 50 int32_t number_of_cores, 51 uint32_t max_payload_size) OVERRIDE; 52 virtual int32_t Encode( 53 const webrtc::I420VideoFrame& input_image, 54 const webrtc::CodecSpecificInfo* codec_specific_info, 55 const std::vector<webrtc::VideoFrameType>* frame_types) OVERRIDE; 56 virtual int32_t RegisterEncodeCompleteCallback( 57 webrtc::EncodedImageCallback* callback) OVERRIDE; 58 virtual int32_t Release() OVERRIDE; 59 virtual int32_t SetChannelParameters(uint32_t packet_loss, int rtt) OVERRIDE; 60 virtual int32_t SetRates(uint32_t new_bit_rate, uint32_t frame_rate) OVERRIDE; 61 62 private: 63 class Impl; 64 friend class RTCVideoEncoder::Impl; 65 66 // Return an encoded output buffer to WebRTC. 67 void ReturnEncodedImage(scoped_ptr<webrtc::EncodedImage> image, 68 int32 bitstream_buffer_id); 69 70 void NotifyError(int32_t error); 71 72 void RecordInitEncodeUMA(int32_t init_retval); 73 74 base::ThreadChecker thread_checker_; 75 76 // The video codec type, as reported to WebRTC. 77 const webrtc::VideoCodecType video_codec_type_; 78 79 // The video codec profile, to configure the encoder to encode to. 80 const media::VideoCodecProfile video_codec_profile_; 81 82 // Factory for creating VEAs, shared memory buffers, etc. 83 scoped_refptr<RendererGpuVideoAcceleratorFactories> gpu_factories_; 84 85 // webrtc::VideoEncoder encode complete callback. 86 webrtc::EncodedImageCallback* encoded_image_callback_; 87 88 // The RTCVideoEncoder::Impl that does all the work. 89 scoped_refptr<Impl> impl_; 90 91 // We cannot immediately return error conditions to the WebRTC user of this 92 // class, as there is no error callback in the webrtc::VideoEncoder interface. 93 // Instead, we cache an error status here and return it the next time an 94 // interface entry point is called. 95 int32_t impl_status_; 96 97 // Weak pointer factory for posting back VEA::Client notifications to 98 // RTCVideoEncoder. 99 base::WeakPtrFactory<RTCVideoEncoder> weak_this_factory_; 100 101 DISALLOW_COPY_AND_ASSIGN(RTCVideoEncoder); 102 }; 103 104 } // namespace content 105 106 #endif // CONTENT_RENDERER_MEDIA_RTC_VIDEO_ENCODER_H_ 107