1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 // TODO(mflodman) ViEEncoder has a time check to not send key frames too often, 12 // move the logic to this class. 13 14 #ifndef WEBRTC_VIDEO_ENGINE_ENCODER_STATE_FEEDBACK_H_ 15 #define WEBRTC_VIDEO_ENGINE_ENCODER_STATE_FEEDBACK_H_ 16 17 #include <map> 18 19 #include "webrtc/base/constructormagic.h" 20 #include "webrtc/system_wrappers/interface/scoped_ptr.h" 21 #include "webrtc/typedefs.h" 22 23 namespace webrtc { 24 25 class CriticalSectionWrapper; 26 class EncoderStateFeedbackObserver; 27 class RtcpIntraFrameObserver; 28 class ViEEncoder; 29 30 class EncoderStateFeedback { 31 public: 32 friend class EncoderStateFeedbackObserver; 33 34 EncoderStateFeedback(); 35 ~EncoderStateFeedback(); 36 37 // Adds an encoder to receive feedback for a unique ssrc. 38 bool AddEncoder(uint32_t ssrc, ViEEncoder* encoder); 39 40 // Removes a registered ViEEncoder. 41 void RemoveEncoder(const ViEEncoder* encoder); 42 43 // Returns an observer to register at the requesting class. The observer has 44 // the same lifetime as the EncoderStateFeedback instance. 45 RtcpIntraFrameObserver* GetRtcpIntraFrameObserver(); 46 47 protected: 48 // Called by EncoderStateFeedbackObserver when a new key frame is requested. 49 void OnReceivedIntraFrameRequest(uint32_t ssrc); 50 void OnReceivedSLI(uint32_t ssrc, uint8_t picture_id); 51 void OnReceivedRPSI(uint32_t ssrc, uint64_t picture_id); 52 void OnLocalSsrcChanged(uint32_t old_ssrc, uint32_t new_ssrc); 53 54 private: 55 typedef std::map<uint32_t, ViEEncoder*> SsrcEncoderMap; 56 57 scoped_ptr<CriticalSectionWrapper> crit_; 58 59 // Instance registered at the class requesting new key frames. 60 scoped_ptr<EncoderStateFeedbackObserver> observer_; 61 62 // Maps a unique ssrc to the given encoder. 63 SsrcEncoderMap encoders_; 64 65 DISALLOW_COPY_AND_ASSIGN(EncoderStateFeedback); 66 }; 67 68 } // namespace webrtc 69 70 #endif // WEBRTC_VIDEO_ENGINE_ENCODER_STATE_FEEDBACK_H_ 71