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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ | 11 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ | 12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
13 | 13 |
14 #include <map> | 14 #include <initializer_list> |
15 | 15 #include <string> |
16 #include "webrtc/base/basictypes.h" | |
17 #include "webrtc/config.h" | |
16 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" | 18 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" |
17 #include "webrtc/typedefs.h" | |
18 | 19 |
19 namespace webrtc { | 20 namespace webrtc { |
20 | 21 |
21 const uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE; | 22 const uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE; |
22 | 23 |
23 const size_t kRtpOneByteHeaderLength = 4; | 24 const size_t kRtpOneByteHeaderLength = 4; |
24 const size_t kTransmissionTimeOffsetLength = 4; | 25 const size_t kTransmissionTimeOffsetLength = 4; |
25 const size_t kAudioLevelLength = 2; | 26 const size_t kAudioLevelLength = 2; |
26 const size_t kAbsoluteSendTimeLength = 4; | 27 const size_t kAbsoluteSendTimeLength = 4; |
27 const size_t kVideoRotationLength = 2; | 28 const size_t kVideoRotationLength = 2; |
28 const size_t kTransportSequenceNumberLength = 3; | 29 const size_t kTransportSequenceNumberLength = 3; |
29 const size_t kPlayoutDelayLength = 4; | 30 const size_t kPlayoutDelayLength = 4; |
30 | 31 |
31 // Playout delay in milliseconds. A playout delay limit (min or max) | 32 // Playout delay in milliseconds. A playout delay limit (min or max) |
32 // has 12 bits allocated. This allows a range of 0-4095 values which translates | 33 // has 12 bits allocated. This allows a range of 0-4095 values which translates |
33 // to a range of 0-40950 in milliseconds. | 34 // to a range of 0-40950 in milliseconds. |
34 const int kPlayoutDelayGranularityMs = 10; | 35 const int kPlayoutDelayGranularityMs = 10; |
35 // Maximum playout delay value in milliseconds. | 36 // Maximum playout delay value in milliseconds. |
36 const int kPlayoutDelayMaxMs = 40950; | 37 const int kPlayoutDelayMaxMs = 40950; |
37 | 38 |
38 struct HeaderExtension { | |
39 explicit HeaderExtension(RTPExtensionType extension_type) | |
40 : type(extension_type), length(0) { | |
41 Init(); | |
42 } | |
43 | |
44 void Init() { | |
45 // TODO(solenberg): Create handler classes for header extensions so we can | |
46 // get rid of switches like these as well as handling code spread out all | |
47 // over. | |
48 switch (type) { | |
49 case kRtpExtensionTransmissionTimeOffset: | |
50 length = kTransmissionTimeOffsetLength; | |
51 break; | |
52 case kRtpExtensionAudioLevel: | |
53 length = kAudioLevelLength; | |
54 break; | |
55 case kRtpExtensionAbsoluteSendTime: | |
56 length = kAbsoluteSendTimeLength; | |
57 break; | |
58 case kRtpExtensionVideoRotation: | |
59 length = kVideoRotationLength; | |
60 break; | |
61 case kRtpExtensionTransportSequenceNumber: | |
62 length = kTransportSequenceNumberLength; | |
63 break; | |
64 case kRtpExtensionPlayoutDelay: | |
65 length = kPlayoutDelayLength; | |
66 break; | |
67 default: | |
68 assert(false); | |
69 } | |
70 } | |
71 | |
72 const RTPExtensionType type; | |
73 uint8_t length; | |
74 }; | |
75 | |
76 class RtpHeaderExtensionMap { | 39 class RtpHeaderExtensionMap { |
77 public: | 40 public: |
78 static constexpr RTPExtensionType kInvalidType = kRtpExtensionNone; | 41 static constexpr RTPExtensionType kInvalidType = kRtpExtensionNone; |
79 static constexpr uint8_t kInvalidId = 0; | 42 static constexpr uint8_t kInvalidId = 0; |
43 | |
80 RtpHeaderExtensionMap(); | 44 RtpHeaderExtensionMap(); |
81 ~RtpHeaderExtensionMap(); | 45 RtpHeaderExtensionMap(std::initializer_list<RtpExtension>); |
82 | 46 |
83 void Erase(); | 47 template <typename Extension> |
84 | 48 bool Register(uint8_t id) { |
85 int32_t Register(RTPExtensionType type, uint8_t id); | 49 return Register(id, Extension::kId, Extension::kValueSizeBytes, |
86 | 50 Extension::kUri); |
87 int32_t Deregister(RTPExtensionType type); | 51 } |
52 bool RegisterByType(uint8_t id, RTPExtensionType type); | |
53 bool RegisterByUri(uint8_t id, const std::string& uri); | |
88 | 54 |
89 bool IsRegistered(RTPExtensionType type) const; | 55 bool IsRegistered(RTPExtensionType type) const; |
56 // Return kInvalidType if not found. | |
57 RTPExtensionType GetType(uint8_t id) const { return types_[id]; } | |
sprang_webrtc
2016/11/08 16:13:37
Maybe we should dcheck id.
Also, could we return a
danilchap
2016/11/08 17:13:41
Done.
sprang_webrtc
2016/11/08 19:19:57
Fair enough. Thanks!
| |
58 // Return kInvalidId if not found. | |
59 uint8_t GetId(RTPExtensionType type) const { return ids_[type]; } | |
sprang_webrtc
2016/11/08 16:13:37
dito
| |
90 | 60 |
91 int32_t GetType(uint8_t id, RTPExtensionType* type) const; | |
92 // Return kInvalidType if not found. | |
93 RTPExtensionType GetType(uint8_t id) const; | |
94 | |
95 int32_t GetId(const RTPExtensionType type, uint8_t* id) const; | |
96 // Return kInvalidId if not found. | |
97 uint8_t GetId(RTPExtensionType type) const; | |
98 size_t GetTotalLengthInBytes() const; | 61 size_t GetTotalLengthInBytes() const; |
99 | 62 |
100 void GetCopy(RtpHeaderExtensionMap* map) const; | 63 // TODO(danilchap): Remove use of the functions below. |
101 | 64 void Erase() { *this = RtpHeaderExtensionMap(); } |
102 int32_t Size() const; | 65 int32_t Register(RTPExtensionType type, uint8_t id) { |
66 return RegisterByType(id, type) ? 0 : -1; | |
67 } | |
68 int32_t Deregister(RTPExtensionType type); | |
69 int32_t GetType(uint8_t id, RTPExtensionType* type) const { | |
70 *type = GetType(id); | |
71 return *type == kInvalidType ? -1 : 0; | |
72 } | |
73 void GetCopy(RtpHeaderExtensionMap* copy) const { *copy = *this; } | |
103 | 74 |
104 private: | 75 private: |
105 std::map<uint8_t, HeaderExtension*> extensionMap_; | 76 static constexpr uint8_t kMinId = 1; |
77 static constexpr uint8_t kMaxId = 14; | |
78 bool Register(uint8_t id, | |
79 RTPExtensionType type, | |
80 size_t value_size, | |
81 const char* uri); | |
82 | |
83 size_t total_values_size_bytes_ = 0; | |
84 RTPExtensionType types_[kMaxId + 1]; | |
85 uint8_t ids_[kRtpExtensionNumberOfExtensions]; | |
106 }; | 86 }; |
107 } // namespace webrtc | 87 } // namespace webrtc |
108 | 88 |
109 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ | 89 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSION_H_ |
110 | 90 |
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