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_ENCODER_STATE_FEEDBACK_H_ 15 #define WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_ 16 17 #include <map> 18 #include <vector> 19 20 #include "webrtc/base/constructormagic.h" 21 #include "webrtc/base/scoped_ptr.h" 22 #include "webrtc/typedefs.h" 23 24 namespace webrtc { 25 26 class CriticalSectionWrapper; 27 class EncoderStateFeedbackObserver; 28 class RtcpIntraFrameObserver; 29 class ViEEncoder; 30 31 class EncoderStateFeedback { 32 public: 33 friend class EncoderStateFeedbackObserver; 34 35 EncoderStateFeedback(); 36 ~EncoderStateFeedback(); 37 38 // Adds an encoder to receive feedback for a set of SSRCs. 39 void AddEncoder(const std::vector<uint32_t>& ssrc, ViEEncoder* encoder); 40 41 // Removes a registered ViEEncoder. 42 void RemoveEncoder(const ViEEncoder* encoder); 43 44 // Returns an observer to register at the requesting class. The observer has 45 // the same lifetime as the EncoderStateFeedback instance. 46 RtcpIntraFrameObserver* GetRtcpIntraFrameObserver(); 47 48 protected: 49 // Called by EncoderStateFeedbackObserver when a new key frame is requested. 50 void OnReceivedIntraFrameRequest(uint32_t ssrc); 51 void OnReceivedSLI(uint32_t ssrc, uint8_t picture_id); 52 void OnReceivedRPSI(uint32_t ssrc, uint64_t picture_id); 53 void OnLocalSsrcChanged(uint32_t old_ssrc, uint32_t new_ssrc); 54 55 private: 56 typedef std::map<uint32_t, ViEEncoder*> SsrcEncoderMap; 57 58 rtc::scoped_ptr<CriticalSectionWrapper> crit_; 59 60 // Instance registered at the class requesting new key frames. 61 rtc::scoped_ptr<EncoderStateFeedbackObserver> observer_; 62 63 // Maps a unique ssrc to the given encoder. 64 SsrcEncoderMap encoders_; 65 66 RTC_DISALLOW_COPY_AND_ASSIGN(EncoderStateFeedback); 67 }; 68 69 } // namespace webrtc 70 71 #endif // WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_ 72