14b43beb7c
TBR=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/915006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@2963 4adac7df-926f-26a2-2b94-8c16560cd09d
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2011 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.
|
|
*/
|
|
|
|
/*
|
|
* This file defines classes for doing reference picture selection, primarily
|
|
* with VP8.
|
|
*/
|
|
|
|
#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_
|
|
#define WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_
|
|
|
|
#include "typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class ReferencePictureSelection {
|
|
public:
|
|
ReferencePictureSelection();
|
|
void Init();
|
|
|
|
// Report a received reference picture selection indication. This will
|
|
// introduce a new established reference if the received RPSI isn't too late.
|
|
void ReceivedRPSI(int rpsi_picture_id);
|
|
|
|
// Report a received slice loss indication. Returns true if a refresh frame
|
|
// must be sent to the receiver, which is accomplished by only predicting
|
|
// from the established reference.
|
|
// |now_ts| is the RTP timestamp corresponding to the current time. Typically
|
|
// the capture timestamp of the frame currently being processed.
|
|
// Returns true if it's time to encode a decoder refresh, otherwise false.
|
|
bool ReceivedSLI(uint32_t now_ts);
|
|
|
|
// Returns the recommended VP8 encode flags needed. May refresh the decoder
|
|
// and/or update the reference buffers.
|
|
// |picture_id| picture id of the frame to be encoded.
|
|
// |send_refresh| should be set to true if a decoder refresh should be
|
|
// encoded, otherwise false.
|
|
// |now_ts| is the RTP timestamp corresponding to the current time. Typically
|
|
// the capture timestamp of the frame currently being processed.
|
|
// Returns the flags to be given to the libvpx encoder when encoding the next
|
|
// frame.
|
|
int EncodeFlags(int picture_id, bool send_refresh, uint32_t now_ts);
|
|
|
|
// Notify the RPS that the frame with picture id |picture_id| was encoded as
|
|
// a key frame, effectively updating all reference buffers.
|
|
void EncodedKeyFrame(int picture_id);
|
|
|
|
// Set the round-trip time between the sender and the receiver to |rtt|
|
|
// milliseconds.
|
|
void SetRtt(int rtt);
|
|
|
|
private:
|
|
static uint32_t TimestampDiff(uint32_t new_ts, uint32_t old_ts);
|
|
|
|
// The minimum time between reference frame updates.
|
|
enum { kMinUpdateInterval = 90 * 10 }; // Timestamp frequency
|
|
const double kRttConfidence;
|
|
|
|
bool update_golden_next_;
|
|
bool established_golden_;
|
|
bool received_ack_;
|
|
int last_sent_ref_picture_id_;
|
|
uint32_t last_sent_ref_update_time_;
|
|
int established_ref_picture_id_;
|
|
uint32_t last_refresh_time_;
|
|
uint32_t rtt_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_
|