6db6cdc604
BUG=webrtc:5277 R=mflodman Review URL: https://codereview.webrtc.org/1513303003 Cr-Commit-Position: refs/heads/master@{#11025}
119 lines
3.4 KiB
C++
119 lines
3.4 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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struct HeaderExtension {
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explicit HeaderExtension(RTPExtensionType extension_type)
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: type(extension_type), length(0), active(true) {
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Init();
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}
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HeaderExtension(RTPExtensionType extension_type, bool active)
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: type(extension_type), length(0), active(active) {
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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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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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bool active;
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};
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class RtpHeaderExtensionMap {
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public:
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RtpHeaderExtensionMap();
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~RtpHeaderExtensionMap();
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void Erase();
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int32_t Register(const RTPExtensionType type, const uint8_t id);
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// Active is a concept for a registered rtp header extension which doesn't
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// take effect yet until being activated. Inactive RTP header extensions do
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// not take effect and should not be included in size calculations until they
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// are activated.
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int32_t RegisterInactive(const RTPExtensionType type, const uint8_t id);
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bool SetActive(const RTPExtensionType type, bool active);
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int32_t Deregister(const RTPExtensionType type);
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bool IsRegistered(RTPExtensionType type) const;
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int32_t GetType(const uint8_t id, RTPExtensionType* type) const;
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int32_t GetId(const RTPExtensionType type, uint8_t* id) const;
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//
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// Methods below ignore any inactive rtp header extensions.
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//
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size_t GetTotalLengthInBytes() const;
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int32_t GetLengthUntilBlockStartInBytes(const RTPExtensionType type) const;
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void GetCopy(RtpHeaderExtensionMap* map) const;
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int32_t Size() const;
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RTPExtensionType First() const;
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RTPExtensionType Next(RTPExtensionType type) const;
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private:
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int32_t Register(const RTPExtensionType type, const uint8_t id, bool active);
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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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