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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 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 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H_ | 10 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H_ |
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23 | 23 |
24 namespace rtp { | 24 namespace rtp { |
25 class Packet { | 25 class Packet { |
26 public: | 26 public: |
27 using ExtensionType = RTPExtensionType; | 27 using ExtensionType = RTPExtensionType; |
28 using ExtensionManager = RtpHeaderExtensionMap; | 28 using ExtensionManager = RtpHeaderExtensionMap; |
29 static constexpr size_t kMaxExtensionHeaders = 14; | 29 static constexpr size_t kMaxExtensionHeaders = 14; |
30 static constexpr int kMinExtensionId = 1; | 30 static constexpr int kMinExtensionId = 1; |
31 static constexpr int kMaxExtensionId = 14; | 31 static constexpr int kMaxExtensionId = 14; |
32 | 32 |
| 33 // |extensions| required for SetExtension/ReserveExtension functions during |
| 34 // packet creating and used if available in Parse function. |
| 35 // Adding and getting extensions will fail until |extensions| is |
| 36 // provided via constructor or IdentifyExtensions function. |
| 37 Packet(); |
| 38 explicit Packet(const ExtensionManager* extensions); |
| 39 Packet(const Packet&); |
| 40 Packet(const ExtensionManager* extensions, size_t capacity); |
| 41 ~Packet(); |
| 42 |
| 43 Packet& operator=(const Packet&) = default; |
| 44 |
33 // Parse and copy given buffer into Packet. | 45 // Parse and copy given buffer into Packet. |
34 bool Parse(const uint8_t* buffer, size_t size); | 46 bool Parse(const uint8_t* buffer, size_t size); |
35 bool Parse(rtc::ArrayView<const uint8_t> packet); | 47 bool Parse(rtc::ArrayView<const uint8_t> packet); |
36 | 48 |
37 // Parse and move given buffer into Packet. | 49 // Parse and move given buffer into Packet. |
38 bool Parse(rtc::CopyOnWriteBuffer packet); | 50 bool Parse(rtc::CopyOnWriteBuffer packet); |
39 | 51 |
40 // Maps extensions id to their types. | 52 // Maps extensions id to their types. |
41 void IdentifyExtensions(const ExtensionManager& extensions); | 53 void IdentifyExtensions(const ExtensionManager& extensions); |
42 | 54 |
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106 // Allocates and returns place to store rtp header extension. | 118 // Allocates and returns place to store rtp header extension. |
107 // Returns empty arrayview on failure. | 119 // Returns empty arrayview on failure. |
108 rtc::ArrayView<uint8_t> AllocateRawExtension(int id, size_t length); | 120 rtc::ArrayView<uint8_t> AllocateRawExtension(int id, size_t length); |
109 | 121 |
110 // Reserve size_bytes for payload. Returns nullptr on failure. | 122 // Reserve size_bytes for payload. Returns nullptr on failure. |
111 uint8_t* SetPayloadSize(size_t size_bytes); | 123 uint8_t* SetPayloadSize(size_t size_bytes); |
112 // Same as SetPayloadSize but doesn't guarantee to keep current payload. | 124 // Same as SetPayloadSize but doesn't guarantee to keep current payload. |
113 uint8_t* AllocatePayload(size_t size_bytes); | 125 uint8_t* AllocatePayload(size_t size_bytes); |
114 bool SetPadding(uint8_t size_bytes, Random* random); | 126 bool SetPadding(uint8_t size_bytes, Random* random); |
115 | 127 |
116 protected: | |
117 // |extensions| required for SetExtension/ReserveExtension functions during | |
118 // packet creating and used if available in Parse function. | |
119 // Adding and getting extensions will fail until |extensions| is | |
120 // provided via constructor or IdentifyExtensions function. | |
121 Packet(); | |
122 explicit Packet(const ExtensionManager* extensions); | |
123 Packet(const Packet&); | |
124 Packet(const ExtensionManager* extensions, size_t capacity); | |
125 ~Packet(); | |
126 | |
127 Packet& operator=(const Packet&) = default; | |
128 | |
129 private: | 128 private: |
130 struct ExtensionInfo { | 129 struct ExtensionInfo { |
131 ExtensionType type; | 130 ExtensionType type; |
132 uint16_t offset; | 131 uint16_t offset; |
133 uint8_t length; | 132 uint8_t length; |
134 }; | 133 }; |
135 | 134 |
136 // Helper function for Parse. Fill header fields using data in given buffer, | 135 // Helper function for Parse. Fill header fields using data in given buffer, |
137 // but does not touch packet own buffer, leaving packet in invalid state. | 136 // but does not touch packet own buffer, leaving packet in invalid state. |
138 bool ParseBuffer(const uint8_t* buffer, size_t size); | 137 bool ParseBuffer(const uint8_t* buffer, size_t size); |
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192 auto buffer = AllocateExtension(Extension::kId, Extension::kValueSizeBytes); | 191 auto buffer = AllocateExtension(Extension::kId, Extension::kValueSizeBytes); |
193 if (buffer.empty()) | 192 if (buffer.empty()) |
194 return false; | 193 return false; |
195 memset(buffer.data(), 0, Extension::kValueSizeBytes); | 194 memset(buffer.data(), 0, Extension::kValueSizeBytes); |
196 return true; | 195 return true; |
197 } | 196 } |
198 } // namespace rtp | 197 } // namespace rtp |
199 } // namespace webrtc | 198 } // namespace webrtc |
200 | 199 |
201 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H_ | 200 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H_ |
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