| /* |
| * Copyright (c) 2012 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. |
| */ |
| |
| #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
| #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
| |
| #include <string> |
| |
| #include "webrtc/base/array_view.h" |
| #include "webrtc/base/basictypes.h" |
| #include "webrtc/base/checks.h" |
| #include "webrtc/config.h" |
| #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" |
| |
| namespace webrtc { |
| |
| const uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE; |
| |
| const size_t kRtpOneByteHeaderLength = 4; |
| const size_t kTransmissionTimeOffsetLength = 4; |
| const size_t kAudioLevelLength = 2; |
| const size_t kAbsoluteSendTimeLength = 4; |
| const size_t kVideoRotationLength = 2; |
| const size_t kTransportSequenceNumberLength = 3; |
| const size_t kPlayoutDelayLength = 4; |
| |
| // Playout delay in milliseconds. A playout delay limit (min or max) |
| // has 12 bits allocated. This allows a range of 0-4095 values which translates |
| // to a range of 0-40950 in milliseconds. |
| const int kPlayoutDelayGranularityMs = 10; |
| // Maximum playout delay value in milliseconds. |
| const int kPlayoutDelayMaxMs = 40950; |
| |
| class RtpHeaderExtensionMap { |
| public: |
| static constexpr RTPExtensionType kInvalidType = kRtpExtensionNone; |
| static constexpr uint8_t kInvalidId = 0; |
| |
| RtpHeaderExtensionMap(); |
| explicit RtpHeaderExtensionMap(rtc::ArrayView<const RtpExtension> extensions); |
| |
| template <typename Extension> |
| bool Register(uint8_t id) { |
| return Register(id, Extension::kId, Extension::kValueSizeBytes, |
| Extension::kUri); |
| } |
| bool RegisterByType(uint8_t id, RTPExtensionType type); |
| bool RegisterByUri(uint8_t id, const std::string& uri); |
| |
| bool IsRegistered(RTPExtensionType type) const { |
| return GetId(type) != kInvalidId; |
| } |
| // Return kInvalidType if not found. |
| RTPExtensionType GetType(uint8_t id) const { |
| RTC_DCHECK_GE(id, kMinId); |
| RTC_DCHECK_LE(id, kMaxId); |
| return types_[id]; |
| } |
| // Return kInvalidId if not found. |
| uint8_t GetId(RTPExtensionType type) const { |
| RTC_DCHECK_GT(type, kRtpExtensionNone); |
| RTC_DCHECK_LT(type, kRtpExtensionNumberOfExtensions); |
| return ids_[type]; |
| } |
| |
| size_t GetTotalLengthInBytes() const; |
| |
| // TODO(danilchap): Remove use of the functions below. |
| int32_t Register(RTPExtensionType type, uint8_t id) { |
| return RegisterByType(id, type) ? 0 : -1; |
| } |
| int32_t Deregister(RTPExtensionType type); |
| |
| private: |
| static constexpr uint8_t kMinId = 1; |
| static constexpr uint8_t kMaxId = 14; |
| bool Register(uint8_t id, |
| RTPExtensionType type, |
| size_t value_size, |
| const char* uri); |
| |
| size_t total_values_size_bytes_ = 0; |
| RTPExtensionType types_[kMaxId + 1]; |
| uint8_t ids_[kRtpExtensionNumberOfExtensions]; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
| |