1 // Copyright 2014 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 MEDIA_CAST_VIDEO_SENDER_EXTERNAL_VIDEO_ENCODER_H_ 6 #define MEDIA_CAST_VIDEO_SENDER_EXTERNAL_VIDEO_ENCODER_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "base/memory/weak_ptr.h" 10 #include "media/cast/cast_config.h" 11 #include "media/cast/cast_environment.h" 12 #include "media/cast/video_sender/video_encoder.h" 13 #include "media/video/video_encode_accelerator.h" 14 15 namespace media { 16 class VideoFrame; 17 } 18 19 namespace media { 20 namespace cast { 21 22 class LocalVideoEncodeAcceleratorClient; 23 24 // This object is called external from the main cast thread and internally from 25 // the video encoder thread. 26 class ExternalVideoEncoder : public VideoEncoder { 27 public: 28 ExternalVideoEncoder( 29 scoped_refptr<CastEnvironment> cast_environment, 30 const VideoSenderConfig& video_config, 31 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, 32 const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb); 33 34 virtual ~ExternalVideoEncoder(); 35 36 // Called from the main cast thread. This function post the encode task to the 37 // video encoder thread; 38 // The video_frame must be valid until the closure callback is called. 39 // The closure callback is called from the video encoder thread as soon as 40 // the encoder is done with the frame; it does not mean that the encoded frame 41 // has been sent out. 42 // Once the encoded frame is ready the frame_encoded_callback is called. 43 virtual bool EncodeVideoFrame( 44 const scoped_refptr<media::VideoFrame>& video_frame, 45 const base::TimeTicks& capture_time, 46 const FrameEncodedCallback& frame_encoded_callback) OVERRIDE; 47 48 // The following functions are called from the main cast thread. 49 virtual void SetBitRate(int new_bit_rate) OVERRIDE; 50 virtual void GenerateKeyFrame() OVERRIDE; 51 virtual void LatestFrameIdToReference(uint32 frame_id) OVERRIDE; 52 53 // Called when a VEA is created. 54 void OnCreateVideoEncodeAccelerator( 55 const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb, 56 scoped_refptr<base::SingleThreadTaskRunner> encoder_task_runner, 57 scoped_ptr<media::VideoEncodeAccelerator> vea); 58 59 protected: 60 void EncoderInitialized(); 61 void EncoderError(); 62 63 private: 64 friend class LocalVideoEncodeAcceleratorClient; 65 66 VideoSenderConfig video_config_; 67 scoped_refptr<CastEnvironment> cast_environment_; 68 69 bool encoder_active_; 70 bool key_frame_requested_; 71 72 scoped_refptr<LocalVideoEncodeAcceleratorClient> video_accelerator_client_; 73 scoped_refptr<base::SingleThreadTaskRunner> encoder_task_runner_; 74 75 // Weak pointer factory for posting back LocalVideoEncodeAcceleratorClient 76 // notifications to ExternalVideoEncoder. 77 // NOTE: Weak pointers must be invalidated before all other member variables. 78 base::WeakPtrFactory<ExternalVideoEncoder> weak_factory_; 79 80 DISALLOW_COPY_AND_ASSIGN(ExternalVideoEncoder); 81 }; 82 83 } // namespace cast 84 } // namespace media 85 86 #endif // MEDIA_CAST_VIDEO_SENDER_EXTERNAL_VIDEO_ENCODER_H_ 87