7f3f8bc5a6
This changes the design of the jitter buffer to keeping track of decodable frames from the point when packets are inserted in the buffer, instead of searching for decodable frames when they are needed. To accomplish this the frame_list_, which previously contained all frames (incomplete or complete, continuous or not), is split into a list of decodable_frames_ (complete, continuous) and a list of incomplete_frames_ (either incomplete or non-continuous). These frame lists are updated every time a packet is inserted. This is another step in the direction of doing most of the work in the jitter buffer only once, when packets are inserted, instead of doing it every time we look for a frame or try to get a nack list. BUG=1798 TEST=vie_auto_test, trybots R=mikhal@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1522005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4104 4adac7df-926f-26a2-2b94-8c16560cd09d
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_VIDEO_CODING_DECODING_STATE_H_
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#define WEBRTC_MODULES_VIDEO_CODING_DECODING_STATE_H_
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#include "typedefs.h"
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namespace webrtc {
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// Forward declarations
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class VCMFrameBuffer;
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class VCMPacket;
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class VCMDecodingState {
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public:
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VCMDecodingState();
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~VCMDecodingState();
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// Check for old frame
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bool IsOldFrame(const VCMFrameBuffer* frame) const;
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// Check for old packet
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bool IsOldPacket(const VCMPacket* packet) const;
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// Check for frame continuity based on current decoded state. Use best method
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// possible, i.e. temporal info, picture ID or sequence number.
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bool ContinuousFrame(const VCMFrameBuffer* frame) const;
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void SetState(const VCMFrameBuffer* frame);
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void CopyFrom(const VCMDecodingState& state);
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bool UpdateEmptyFrame(const VCMFrameBuffer* frame);
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// Update the sequence number if the timestamp matches current state and the
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// sequence number is higher than the current one. This accounts for packets
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// arriving late.
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void UpdateOldPacket(const VCMPacket* packet);
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void SetSeqNum(uint16_t new_seq_num);
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void Reset();
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uint32_t time_stamp() const;
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uint16_t sequence_num() const;
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// Return true if at initial state.
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bool in_initial_state() const;
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// Return true when sync is on - decode all layers.
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bool full_sync() const;
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private:
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void UpdateSyncState(const VCMFrameBuffer* frame);
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// Designated continuity functions
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bool ContinuousPictureId(int picture_id) const;
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bool ContinuousSeqNum(uint16_t seq_num) const;
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bool ContinuousLayer(int temporal_id, int tl0_pic_id) const;
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bool UsingPictureId(const VCMFrameBuffer* frame) const;
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// Keep state of last decoded frame.
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// TODO(mikhal/stefan): create designated classes to handle these types.
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uint16_t sequence_num_;
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uint32_t time_stamp_;
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int picture_id_;
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int temporal_id_;
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int tl0_pic_id_;
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bool full_sync_; // Sync flag when temporal layers are used.
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bool in_initial_state_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_DECODING_STATE_H_
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