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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// TODO(mflodman) ViEEncoder has a time check to not send key frames too often,
// move the logic to this class.
#ifndef WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_
#define WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_
#include <map>
#include <vector>
#include "webrtc/base/constructormagic.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class CriticalSectionWrapper;
class EncoderStateFeedbackObserver;
class RtcpIntraFrameObserver;
class ViEEncoder;
class EncoderStateFeedback {
public:
friend class EncoderStateFeedbackObserver;
EncoderStateFeedback();
~EncoderStateFeedback();
// Adds an encoder to receive feedback for a set of SSRCs.
void AddEncoder(const std::vector<uint32_t>& ssrc, ViEEncoder* encoder);
// Removes a registered ViEEncoder.
void RemoveEncoder(const ViEEncoder* encoder);
// Returns an observer to register at the requesting class. The observer has
// the same lifetime as the EncoderStateFeedback instance.
RtcpIntraFrameObserver* GetRtcpIntraFrameObserver();
protected:
// Called by EncoderStateFeedbackObserver when a new key frame is requested.
void OnReceivedIntraFrameRequest(uint32_t ssrc);
void OnReceivedSLI(uint32_t ssrc, uint8_t picture_id);
void OnReceivedRPSI(uint32_t ssrc, uint64_t picture_id);
void OnLocalSsrcChanged(uint32_t old_ssrc, uint32_t new_ssrc);
private:
typedef std::map<uint32_t, ViEEncoder*> SsrcEncoderMap;
rtc::scoped_ptr<CriticalSectionWrapper> crit_;
// Instance registered at the class requesting new key frames.
rtc::scoped_ptr<EncoderStateFeedbackObserver> observer_;
// Maps a unique ssrc to the given encoder.
SsrcEncoderMap encoders_;
RTC_DISALLOW_COPY_AND_ASSIGN(EncoderStateFeedback);
};
} // namespace webrtc
#endif // WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_
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