bc38b4d450
Reason for revert: breaks downstream project Original issue's description: > Simplify and extend RtpHeaderExtensionMap > Add register functions for various codepaths. > Add initialize-list constructor to create usable const RtpHeaderExtensionMap > Optimize implementation for GetId/GetType. > > BUG=webrtc:1994 > > Committed: https://crrev.com/d1d26fbeb37a69471a34004c6ac2d3fafde5d404 > Cr-Commit-Position: refs/heads/master@{#14986} TBR=sprang@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:1994 Review-Url: https://codereview.webrtc.org/2484863007 Cr-Commit-Position: refs/heads/master@{#14988}
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/*
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* Copyright (c) 2012 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_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_
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#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_
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#include <map>
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#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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const uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE;
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const size_t kRtpOneByteHeaderLength = 4;
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const size_t kTransmissionTimeOffsetLength = 4;
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const size_t kAudioLevelLength = 2;
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const size_t kAbsoluteSendTimeLength = 4;
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const size_t kVideoRotationLength = 2;
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const size_t kTransportSequenceNumberLength = 3;
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const size_t kPlayoutDelayLength = 4;
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// Playout delay in milliseconds. A playout delay limit (min or max)
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// has 12 bits allocated. This allows a range of 0-4095 values which translates
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// to a range of 0-40950 in milliseconds.
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const int kPlayoutDelayGranularityMs = 10;
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// Maximum playout delay value in milliseconds.
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const int kPlayoutDelayMaxMs = 40950;
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struct HeaderExtension {
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explicit HeaderExtension(RTPExtensionType extension_type)
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: type(extension_type), length(0) {
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Init();
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}
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void Init() {
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// TODO(solenberg): Create handler classes for header extensions so we can
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// get rid of switches like these as well as handling code spread out all
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// over.
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switch (type) {
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case kRtpExtensionTransmissionTimeOffset:
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length = kTransmissionTimeOffsetLength;
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break;
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case kRtpExtensionAudioLevel:
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length = kAudioLevelLength;
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break;
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case kRtpExtensionAbsoluteSendTime:
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length = kAbsoluteSendTimeLength;
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break;
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case kRtpExtensionVideoRotation:
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length = kVideoRotationLength;
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break;
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case kRtpExtensionTransportSequenceNumber:
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length = kTransportSequenceNumberLength;
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break;
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case kRtpExtensionPlayoutDelay:
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length = kPlayoutDelayLength;
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break;
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default:
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assert(false);
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}
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}
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const RTPExtensionType type;
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uint8_t length;
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};
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class RtpHeaderExtensionMap {
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public:
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static constexpr RTPExtensionType kInvalidType = kRtpExtensionNone;
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static constexpr uint8_t kInvalidId = 0;
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RtpHeaderExtensionMap();
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~RtpHeaderExtensionMap();
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void Erase();
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int32_t Register(RTPExtensionType type, uint8_t id);
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int32_t Deregister(RTPExtensionType type);
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bool IsRegistered(RTPExtensionType type) const;
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int32_t GetType(uint8_t id, RTPExtensionType* type) const;
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// Return kInvalidType if not found.
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RTPExtensionType GetType(uint8_t id) const;
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int32_t GetId(const RTPExtensionType type, uint8_t* id) const;
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// Return kInvalidId if not found.
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uint8_t GetId(RTPExtensionType type) const;
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size_t GetTotalLengthInBytes() const;
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void GetCopy(RtpHeaderExtensionMap* map) const;
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int32_t Size() const;
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private:
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std::map<uint8_t, HeaderExtension*> extensionMap_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_
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