9d3ab61325
Trying to submit all changes at once proved impossible since there were too many changes in too many files. The changes to PRESUBMIT.py will be uploaded in the last CL. (original CL: https://codereview.webrtc.org/1528503003/) BUG=webrtc:5309 TBR=mflodman@webrtc.org Review URL: https://codereview.webrtc.org/1543503002 Cr-Commit-Position: refs/heads/master@{#11102}
83 lines
2.9 KiB
C++
83 lines
2.9 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 "webrtc/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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// The max number of bits used to reference back
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// to a previous frame when using flexible mode.
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static const uint16_t kNumRefBits = 7;
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static const uint16_t kFrameDecodedLength = 1 << kNumRefBits;
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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 ContinuousFrameRefs(const VCMFrameBuffer* frame) const;
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bool UsingPictureId(const VCMFrameBuffer* frame) const;
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bool UsingFlexibleMode(const VCMFrameBuffer* frame) const;
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bool AheadOfFramesDecodedClearedTo(uint16_t index) 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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// Used to check references in flexible mode.
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bool frame_decoded_[kFrameDecodedLength];
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uint16_t frame_decoded_cleared_to_;
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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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