danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 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 |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "modules/rtp_rtcp/source/rtp_header_extensions.h" |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 12 | |
Yves Gerey | 988cc08 | 2018-10-23 12:03:01 +0200 | [diff] [blame] | 13 | #include <string.h> |
Jonas Olsson | a4d8737 | 2019-07-05 19:08:33 +0200 | [diff] [blame] | 14 | |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 15 | #include <cmath> |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 16 | #include <limits> |
Yves Gerey | 988cc08 | 2018-10-23 12:03:01 +0200 | [diff] [blame] | 17 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 18 | #include "modules/rtp_rtcp/include/rtp_cvo.h" |
| 19 | #include "modules/rtp_rtcp/source/byte_io.h" |
Yves Gerey | 988cc08 | 2018-10-23 12:03:01 +0200 | [diff] [blame] | 20 | // TODO(bug:9855) Move kNoSpatialIdx from vp9_globals.h to common_constants |
| 21 | #include "modules/video_coding/codecs/interface/common_constants.h" |
Niels Möller | 834a554 | 2019-09-23 10:31:16 +0200 | [diff] [blame] | 22 | #include "modules/video_coding/codecs/vp9/include/vp9_globals.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 23 | #include "rtc_base/checks.h" |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 24 | |
| 25 | namespace webrtc { |
| 26 | // Absolute send time in RTP streams. |
| 27 | // |
| 28 | // The absolute send time is signaled to the receiver in-band using the |
Johannes Kron | 07ba2b9 | 2018-09-26 13:33:35 +0200 | [diff] [blame] | 29 | // general mechanism for RTP header extensions [RFC8285]. The payload |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 30 | // of this extension (the transmitted value) is a 24-bit unsigned integer |
| 31 | // containing the sender's current time in seconds as a fixed point number |
| 32 | // with 18 bits fractional part. |
| 33 | // |
| 34 | // The form of the absolute send time extension block: |
| 35 | // |
| 36 | // 0 1 2 3 |
| 37 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 38 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 39 | // | ID | len=2 | absolute send time | |
| 40 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
danilchap | e2a0177 | 2016-10-28 07:08:58 -0700 | [diff] [blame] | 41 | constexpr RTPExtensionType AbsoluteSendTime::kId; |
| 42 | constexpr uint8_t AbsoluteSendTime::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 43 | constexpr const char AbsoluteSendTime::kUri[]; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 44 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 45 | bool AbsoluteSendTime::Parse(rtc::ArrayView<const uint8_t> data, |
| 46 | uint32_t* time_24bits) { |
| 47 | if (data.size() != 3) |
| 48 | return false; |
| 49 | *time_24bits = ByteReader<uint32_t, 3>::ReadBigEndian(data.data()); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 50 | return true; |
| 51 | } |
| 52 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 53 | bool AbsoluteSendTime::Write(rtc::ArrayView<uint8_t> data, |
| 54 | uint32_t time_24bits) { |
| 55 | RTC_DCHECK_EQ(data.size(), 3); |
Danil Chapovalov | f3ba648 | 2017-06-12 15:43:55 +0200 | [diff] [blame] | 56 | RTC_DCHECK_LE(time_24bits, 0x00FFFFFF); |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 57 | ByteWriter<uint32_t, 3>::WriteBigEndian(data.data(), time_24bits); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 58 | return true; |
| 59 | } |
| 60 | |
Chen Xing | cd8a6e2 | 2019-07-01 10:56:51 +0200 | [diff] [blame] | 61 | // Absolute Capture Time |
| 62 | // |
| 63 | // The Absolute Capture Time extension is used to stamp RTP packets with a NTP |
| 64 | // timestamp showing when the first audio or video frame in a packet was |
| 65 | // originally captured. The intent of this extension is to provide a way to |
| 66 | // accomplish audio-to-video synchronization when RTCP-terminating intermediate |
| 67 | // systems (e.g. mixers) are involved. |
| 68 | // |
| 69 | // Data layout of the shortened version of abs-capture-time: |
| 70 | // |
| 71 | // 0 1 2 3 |
| 72 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 73 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 74 | // | ID | len=7 | absolute capture timestamp (bit 0-23) | |
| 75 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 76 | // | absolute capture timestamp (bit 24-55) | |
| 77 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 78 | // | ... (56-63) | |
| 79 | // +-+-+-+-+-+-+-+-+ |
| 80 | // |
| 81 | // Data layout of the extended version of abs-capture-time: |
| 82 | // |
| 83 | // 0 1 2 3 |
| 84 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 85 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 86 | // | ID | len=15| absolute capture timestamp (bit 0-23) | |
| 87 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 88 | // | absolute capture timestamp (bit 24-55) | |
| 89 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 90 | // | ... (56-63) | estimated capture clock offset (bit 0-23) | |
| 91 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 92 | // | estimated capture clock offset (bit 24-55) | |
| 93 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 94 | // | ... (56-63) | |
| 95 | // +-+-+-+-+-+-+-+-+ |
| 96 | constexpr RTPExtensionType AbsoluteCaptureTimeExtension::kId; |
| 97 | constexpr uint8_t AbsoluteCaptureTimeExtension::kValueSizeBytes; |
| 98 | constexpr uint8_t AbsoluteCaptureTimeExtension:: |
| 99 | kValueSizeBytesWithoutEstimatedCaptureClockOffset; |
| 100 | constexpr const char AbsoluteCaptureTimeExtension::kUri[]; |
| 101 | |
| 102 | bool AbsoluteCaptureTimeExtension::Parse(rtc::ArrayView<const uint8_t> data, |
| 103 | AbsoluteCaptureTime* extension) { |
| 104 | if (data.size() != kValueSizeBytes && |
| 105 | data.size() != kValueSizeBytesWithoutEstimatedCaptureClockOffset) { |
| 106 | return false; |
| 107 | } |
| 108 | |
| 109 | extension->absolute_capture_timestamp = |
| 110 | ByteReader<uint64_t>::ReadBigEndian(data.data()); |
| 111 | |
| 112 | if (data.size() != kValueSizeBytesWithoutEstimatedCaptureClockOffset) { |
| 113 | extension->estimated_capture_clock_offset = |
| 114 | ByteReader<int64_t>::ReadBigEndian(data.data() + 8); |
| 115 | } |
| 116 | |
| 117 | return true; |
| 118 | } |
| 119 | |
| 120 | size_t AbsoluteCaptureTimeExtension::ValueSize( |
| 121 | const AbsoluteCaptureTime& extension) { |
| 122 | if (extension.estimated_capture_clock_offset != absl::nullopt) { |
| 123 | return kValueSizeBytes; |
| 124 | } else { |
| 125 | return kValueSizeBytesWithoutEstimatedCaptureClockOffset; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | bool AbsoluteCaptureTimeExtension::Write(rtc::ArrayView<uint8_t> data, |
| 130 | const AbsoluteCaptureTime& extension) { |
| 131 | RTC_DCHECK_EQ(data.size(), ValueSize(extension)); |
| 132 | |
| 133 | ByteWriter<uint64_t>::WriteBigEndian(data.data(), |
| 134 | extension.absolute_capture_timestamp); |
| 135 | |
| 136 | if (data.size() != kValueSizeBytesWithoutEstimatedCaptureClockOffset) { |
| 137 | ByteWriter<int64_t>::WriteBigEndian( |
| 138 | data.data() + 8, extension.estimated_capture_clock_offset.value()); |
| 139 | } |
| 140 | |
| 141 | return true; |
| 142 | } |
| 143 | |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 144 | // An RTP Header Extension for Client-to-Mixer Audio Level Indication |
| 145 | // |
| 146 | // https://datatracker.ietf.org/doc/draft-lennox-avt-rtp-audio-level-exthdr/ |
| 147 | // |
| 148 | // The form of the audio level extension block: |
| 149 | // |
| 150 | // 0 1 |
| 151 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 |
| 152 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 153 | // | ID | len=0 |V| level | |
| 154 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 155 | // |
danilchap | e2a0177 | 2016-10-28 07:08:58 -0700 | [diff] [blame] | 156 | constexpr RTPExtensionType AudioLevel::kId; |
| 157 | constexpr uint8_t AudioLevel::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 158 | constexpr const char AudioLevel::kUri[]; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 159 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 160 | bool AudioLevel::Parse(rtc::ArrayView<const uint8_t> data, |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 161 | bool* voice_activity, |
| 162 | uint8_t* audio_level) { |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 163 | if (data.size() != 1) |
| 164 | return false; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 165 | *voice_activity = (data[0] & 0x80) != 0; |
| 166 | *audio_level = data[0] & 0x7F; |
| 167 | return true; |
| 168 | } |
| 169 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 170 | bool AudioLevel::Write(rtc::ArrayView<uint8_t> data, |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 171 | bool voice_activity, |
| 172 | uint8_t audio_level) { |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 173 | RTC_DCHECK_EQ(data.size(), 1); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 174 | RTC_CHECK_LE(audio_level, 0x7f); |
| 175 | data[0] = (voice_activity ? 0x80 : 0x00) | audio_level; |
| 176 | return true; |
| 177 | } |
| 178 | |
| 179 | // From RFC 5450: Transmission Time Offsets in RTP Streams. |
| 180 | // |
| 181 | // The transmission time is signaled to the receiver in-band using the |
Johannes Kron | 07ba2b9 | 2018-09-26 13:33:35 +0200 | [diff] [blame] | 182 | // general mechanism for RTP header extensions [RFC8285]. The payload |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 183 | // of this extension (the transmitted value) is a 24-bit signed integer. |
| 184 | // When added to the RTP timestamp of the packet, it represents the |
| 185 | // "effective" RTP transmission time of the packet, on the RTP |
| 186 | // timescale. |
| 187 | // |
| 188 | // The form of the transmission offset extension block: |
| 189 | // |
| 190 | // 0 1 2 3 |
| 191 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 192 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 193 | // | ID | len=2 | transmission offset | |
| 194 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
danilchap | e2a0177 | 2016-10-28 07:08:58 -0700 | [diff] [blame] | 195 | constexpr RTPExtensionType TransmissionOffset::kId; |
| 196 | constexpr uint8_t TransmissionOffset::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 197 | constexpr const char TransmissionOffset::kUri[]; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 198 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 199 | bool TransmissionOffset::Parse(rtc::ArrayView<const uint8_t> data, |
| 200 | int32_t* rtp_time) { |
| 201 | if (data.size() != 3) |
| 202 | return false; |
| 203 | *rtp_time = ByteReader<int32_t, 3>::ReadBigEndian(data.data()); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 204 | return true; |
| 205 | } |
| 206 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 207 | bool TransmissionOffset::Write(rtc::ArrayView<uint8_t> data, int32_t rtp_time) { |
| 208 | RTC_DCHECK_EQ(data.size(), 3); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 209 | RTC_DCHECK_LE(rtp_time, 0x00ffffff); |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 210 | ByteWriter<int32_t, 3>::WriteBigEndian(data.data(), rtp_time); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 211 | return true; |
| 212 | } |
| 213 | |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 214 | // TransportSequenceNumber |
| 215 | // |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 216 | // 0 1 2 |
| 217 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 |
| 218 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 219 | // | ID | L=1 |transport-wide sequence number | |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 220 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
danilchap | e2a0177 | 2016-10-28 07:08:58 -0700 | [diff] [blame] | 221 | constexpr RTPExtensionType TransportSequenceNumber::kId; |
| 222 | constexpr uint8_t TransportSequenceNumber::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 223 | constexpr const char TransportSequenceNumber::kUri[]; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 224 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 225 | bool TransportSequenceNumber::Parse(rtc::ArrayView<const uint8_t> data, |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 226 | uint16_t* transport_sequence_number) { |
| 227 | if (data.size() != kValueSizeBytes) |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 228 | return false; |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 229 | *transport_sequence_number = ByteReader<uint16_t>::ReadBigEndian(data.data()); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 230 | return true; |
| 231 | } |
| 232 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 233 | bool TransportSequenceNumber::Write(rtc::ArrayView<uint8_t> data, |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 234 | uint16_t transport_sequence_number) { |
| 235 | RTC_DCHECK_EQ(data.size(), ValueSize(transport_sequence_number)); |
| 236 | ByteWriter<uint16_t>::WriteBigEndian(data.data(), transport_sequence_number); |
| 237 | return true; |
| 238 | } |
| 239 | |
| 240 | // TransportSequenceNumberV2 |
| 241 | // |
| 242 | // In addition to the format used for TransportSequencNumber, V2 also supports |
| 243 | // the following packet format where two extra bytes are used to specify that |
| 244 | // the sender requests immediate feedback. |
| 245 | // 0 1 2 3 |
| 246 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 247 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 248 | // | ID | L=3 |transport-wide sequence number |T| seq count | |
| 249 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 250 | // |seq count cont.| |
| 251 | // +-+-+-+-+-+-+-+-+ |
| 252 | // |
| 253 | // The bit |T| determines whether the feedback should include timing information |
Johannes Kron | 0da25a1 | 2019-03-06 09:34:13 +0100 | [diff] [blame] | 254 | // or not and |seq_count| determines how many packets the feedback packet should |
| 255 | // cover including the current packet. If |seq_count| is zero no feedback is |
| 256 | // requested. |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 257 | constexpr RTPExtensionType TransportSequenceNumberV2::kId; |
Johannes Kron | 0da25a1 | 2019-03-06 09:34:13 +0100 | [diff] [blame] | 258 | constexpr uint8_t TransportSequenceNumberV2::kValueSizeBytes; |
| 259 | constexpr uint8_t |
| 260 | TransportSequenceNumberV2::kValueSizeBytesWithoutFeedbackRequest; |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 261 | constexpr const char TransportSequenceNumberV2::kUri[]; |
| 262 | constexpr uint16_t TransportSequenceNumberV2::kIncludeTimestampsBit; |
| 263 | |
| 264 | bool TransportSequenceNumberV2::Parse( |
| 265 | rtc::ArrayView<const uint8_t> data, |
| 266 | uint16_t* transport_sequence_number, |
| 267 | absl::optional<FeedbackRequest>* feedback_request) { |
Johannes Kron | 0da25a1 | 2019-03-06 09:34:13 +0100 | [diff] [blame] | 268 | if (data.size() != kValueSizeBytes && |
| 269 | data.size() != kValueSizeBytesWithoutFeedbackRequest) |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 270 | return false; |
| 271 | |
| 272 | *transport_sequence_number = ByteReader<uint16_t>::ReadBigEndian(data.data()); |
| 273 | |
Johannes Kron | 0da25a1 | 2019-03-06 09:34:13 +0100 | [diff] [blame] | 274 | *feedback_request = absl::nullopt; |
| 275 | if (data.size() == kValueSizeBytes) { |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 276 | uint16_t feedback_request_raw = |
| 277 | ByteReader<uint16_t>::ReadBigEndian(data.data() + 2); |
| 278 | bool include_timestamps = |
| 279 | (feedback_request_raw & kIncludeTimestampsBit) != 0; |
| 280 | uint16_t sequence_count = feedback_request_raw & ~kIncludeTimestampsBit; |
Johannes Kron | 0da25a1 | 2019-03-06 09:34:13 +0100 | [diff] [blame] | 281 | |
| 282 | // If |sequence_count| is zero no feedback is requested. |
| 283 | if (sequence_count != 0) { |
| 284 | *feedback_request = {include_timestamps, sequence_count}; |
| 285 | } |
Johannes Kron | 54047be | 2019-02-21 14:09:20 +0000 | [diff] [blame] | 286 | } |
| 287 | return true; |
| 288 | } |
| 289 | |
| 290 | bool TransportSequenceNumberV2::Write( |
| 291 | rtc::ArrayView<uint8_t> data, |
| 292 | uint16_t transport_sequence_number, |
| 293 | const absl::optional<FeedbackRequest>& feedback_request) { |
| 294 | RTC_DCHECK_EQ(data.size(), |
| 295 | ValueSize(transport_sequence_number, feedback_request)); |
| 296 | |
| 297 | ByteWriter<uint16_t>::WriteBigEndian(data.data(), transport_sequence_number); |
| 298 | |
| 299 | if (feedback_request) { |
| 300 | RTC_DCHECK_GE(feedback_request->sequence_count, 0); |
| 301 | RTC_DCHECK_LT(feedback_request->sequence_count, kIncludeTimestampsBit); |
| 302 | uint16_t feedback_request_raw = |
| 303 | feedback_request->sequence_count | |
| 304 | (feedback_request->include_timestamps ? kIncludeTimestampsBit : 0); |
| 305 | ByteWriter<uint16_t>::WriteBigEndian(data.data() + 2, feedback_request_raw); |
| 306 | } |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 307 | return true; |
| 308 | } |
| 309 | |
| 310 | // Coordination of Video Orientation in RTP streams. |
| 311 | // |
| 312 | // Coordination of Video Orientation consists in signaling of the current |
| 313 | // orientation of the image captured on the sender side to the receiver for |
| 314 | // appropriate rendering and displaying. |
| 315 | // |
| 316 | // 0 1 |
| 317 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 |
| 318 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 319 | // | ID | len=0 |0 0 0 0 C F R R| |
| 320 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
danilchap | e2a0177 | 2016-10-28 07:08:58 -0700 | [diff] [blame] | 321 | constexpr RTPExtensionType VideoOrientation::kId; |
| 322 | constexpr uint8_t VideoOrientation::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 323 | constexpr const char VideoOrientation::kUri[]; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 324 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 325 | bool VideoOrientation::Parse(rtc::ArrayView<const uint8_t> data, |
| 326 | VideoRotation* rotation) { |
| 327 | if (data.size() != 1) |
| 328 | return false; |
magjed | 71eb61c | 2016-09-08 03:24:58 -0700 | [diff] [blame] | 329 | *rotation = ConvertCVOByteToVideoRotation(data[0]); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 330 | return true; |
| 331 | } |
| 332 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 333 | bool VideoOrientation::Write(rtc::ArrayView<uint8_t> data, |
| 334 | VideoRotation rotation) { |
| 335 | RTC_DCHECK_EQ(data.size(), 1); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 336 | data[0] = ConvertVideoRotationToCVOByte(rotation); |
| 337 | return true; |
| 338 | } |
| 339 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 340 | bool VideoOrientation::Parse(rtc::ArrayView<const uint8_t> data, |
| 341 | uint8_t* value) { |
| 342 | if (data.size() != 1) |
| 343 | return false; |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 344 | *value = data[0]; |
| 345 | return true; |
| 346 | } |
| 347 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 348 | bool VideoOrientation::Write(rtc::ArrayView<uint8_t> data, uint8_t value) { |
| 349 | RTC_DCHECK_EQ(data.size(), 1); |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 350 | data[0] = value; |
| 351 | return true; |
| 352 | } |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 353 | |
| 354 | // 0 1 2 3 |
| 355 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 356 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 357 | // | ID | len=2 | MIN delay | MAX delay | |
| 358 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 359 | constexpr RTPExtensionType PlayoutDelayLimits::kId; |
| 360 | constexpr uint8_t PlayoutDelayLimits::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 361 | constexpr const char PlayoutDelayLimits::kUri[]; |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 362 | |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 363 | bool PlayoutDelayLimits::Parse(rtc::ArrayView<const uint8_t> data, |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 364 | PlayoutDelay* playout_delay) { |
| 365 | RTC_DCHECK(playout_delay); |
danilchap | 978504e | 2017-04-06 01:03:53 -0700 | [diff] [blame] | 366 | if (data.size() != 3) |
| 367 | return false; |
| 368 | uint32_t raw = ByteReader<uint32_t, 3>::ReadBigEndian(data.data()); |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 369 | uint16_t min_raw = (raw >> 12); |
| 370 | uint16_t max_raw = (raw & 0xfff); |
| 371 | if (min_raw > max_raw) |
| 372 | return false; |
| 373 | playout_delay->min_ms = min_raw * kGranularityMs; |
| 374 | playout_delay->max_ms = max_raw * kGranularityMs; |
| 375 | return true; |
| 376 | } |
| 377 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 378 | bool PlayoutDelayLimits::Write(rtc::ArrayView<uint8_t> data, |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 379 | const PlayoutDelay& playout_delay) { |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 380 | RTC_DCHECK_EQ(data.size(), 3); |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 381 | RTC_DCHECK_LE(0, playout_delay.min_ms); |
| 382 | RTC_DCHECK_LE(playout_delay.min_ms, playout_delay.max_ms); |
| 383 | RTC_DCHECK_LE(playout_delay.max_ms, kMaxMs); |
| 384 | // Convert MS to value to be sent on extension header. |
| 385 | uint32_t min_delay = playout_delay.min_ms / kGranularityMs; |
| 386 | uint32_t max_delay = playout_delay.max_ms / kGranularityMs; |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 387 | ByteWriter<uint32_t, 3>::WriteBigEndian(data.data(), |
| 388 | (min_delay << 12) | max_delay); |
Danil Chapovalov | 08b0351 | 2016-09-07 15:08:13 +0200 | [diff] [blame] | 389 | return true; |
| 390 | } |
| 391 | |
ilnik | 00d802b | 2017-04-11 10:34:31 -0700 | [diff] [blame] | 392 | // Video Content Type. |
| 393 | // |
| 394 | // E.g. default video or screenshare. |
| 395 | // |
| 396 | // 0 1 |
| 397 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 |
| 398 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 399 | // | ID | len=0 | Content type | |
| 400 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 401 | constexpr RTPExtensionType VideoContentTypeExtension::kId; |
| 402 | constexpr uint8_t VideoContentTypeExtension::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 403 | constexpr const char VideoContentTypeExtension::kUri[]; |
ilnik | 00d802b | 2017-04-11 10:34:31 -0700 | [diff] [blame] | 404 | |
| 405 | bool VideoContentTypeExtension::Parse(rtc::ArrayView<const uint8_t> data, |
| 406 | VideoContentType* content_type) { |
| 407 | if (data.size() == 1 && |
ilnik | 6d5b4d6 | 2017-08-30 03:32:14 -0700 | [diff] [blame] | 408 | videocontenttypehelpers::IsValidContentType(data[0])) { |
ilnik | 00d802b | 2017-04-11 10:34:31 -0700 | [diff] [blame] | 409 | *content_type = static_cast<VideoContentType>(data[0]); |
| 410 | return true; |
| 411 | } |
| 412 | return false; |
| 413 | } |
| 414 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 415 | bool VideoContentTypeExtension::Write(rtc::ArrayView<uint8_t> data, |
ilnik | 00d802b | 2017-04-11 10:34:31 -0700 | [diff] [blame] | 416 | VideoContentType content_type) { |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 417 | RTC_DCHECK_EQ(data.size(), 1); |
ilnik | 00d802b | 2017-04-11 10:34:31 -0700 | [diff] [blame] | 418 | data[0] = static_cast<uint8_t>(content_type); |
| 419 | return true; |
| 420 | } |
| 421 | |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 422 | // Video Timing. |
| 423 | // 6 timestamps in milliseconds counted from capture time stored in rtp header: |
| 424 | // encode start/finish, packetization complete, pacer exit and reserved for |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 425 | // modification by the network modification. |flags| is a bitmask and has the |
| 426 | // following allowed values: |
| 427 | // 0 = Valid data, but no flags available (backwards compatibility) |
| 428 | // 1 = Frame marked as timing frame due to cyclic timer. |
| 429 | // 2 = Frame marked as timing frame due to size being outside limit. |
| 430 | // 255 = Invalid. The whole timing frame extension should be ignored. |
| 431 | // |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 432 | // 0 1 2 3 |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 433 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 434 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 435 | // | ID | len=12| flags | encode start ms delta | |
| 436 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 437 | // | encode finish ms delta | packetizer finish ms delta | |
| 438 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 439 | // | pacer exit ms delta | network timestamp ms delta | |
| 440 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 441 | // | network2 timestamp ms delta | |
| 442 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 443 | |
| 444 | constexpr RTPExtensionType VideoTimingExtension::kId; |
| 445 | constexpr uint8_t VideoTimingExtension::kValueSizeBytes; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 446 | constexpr const char VideoTimingExtension::kUri[]; |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 447 | |
| 448 | bool VideoTimingExtension::Parse(rtc::ArrayView<const uint8_t> data, |
ilnik | 2edc684 | 2017-07-06 03:06:50 -0700 | [diff] [blame] | 449 | VideoSendTiming* timing) { |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 450 | RTC_DCHECK(timing); |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 451 | // TODO(sprang): Deprecate support for old wire format. |
| 452 | ptrdiff_t off = 0; |
| 453 | switch (data.size()) { |
| 454 | case kValueSizeBytes - 1: |
| 455 | timing->flags = 0; |
| 456 | off = 1; // Old wire format without the flags field. |
| 457 | break; |
| 458 | case kValueSizeBytes: |
| 459 | timing->flags = ByteReader<uint8_t>::ReadBigEndian(data.data()); |
| 460 | break; |
| 461 | default: |
| 462 | return false; |
| 463 | } |
| 464 | |
| 465 | timing->encode_start_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
| 466 | data.data() + VideoSendTiming::kEncodeStartDeltaOffset - off); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 467 | timing->encode_finish_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 468 | data.data() + VideoSendTiming::kEncodeFinishDeltaOffset - off); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 469 | timing->packetization_finish_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 470 | data.data() + VideoSendTiming::kPacketizationFinishDeltaOffset - off); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 471 | timing->pacer_exit_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 472 | data.data() + VideoSendTiming::kPacerExitDeltaOffset - off); |
Danil Chapovalov | 996eb9e | 2017-10-30 17:14:41 +0100 | [diff] [blame] | 473 | timing->network_timestamp_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 474 | data.data() + VideoSendTiming::kNetworkTimestampDeltaOffset - off); |
Danil Chapovalov | 996eb9e | 2017-10-30 17:14:41 +0100 | [diff] [blame] | 475 | timing->network2_timestamp_delta_ms = ByteReader<uint16_t>::ReadBigEndian( |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 476 | data.data() + VideoSendTiming::kNetwork2TimestampDeltaOffset - off); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 477 | return true; |
| 478 | } |
| 479 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 480 | bool VideoTimingExtension::Write(rtc::ArrayView<uint8_t> data, |
| 481 | const VideoSendTiming& timing) { |
| 482 | RTC_DCHECK_EQ(data.size(), 1 + 2 * 6); |
| 483 | ByteWriter<uint8_t>::WriteBigEndian( |
| 484 | data.data() + VideoSendTiming::kFlagsOffset, timing.flags); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 485 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 486 | data.data() + VideoSendTiming::kEncodeStartDeltaOffset, |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 487 | timing.encode_start_delta_ms); |
| 488 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 489 | data.data() + VideoSendTiming::kEncodeFinishDeltaOffset, |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 490 | timing.encode_finish_delta_ms); |
| 491 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 492 | data.data() + VideoSendTiming::kPacketizationFinishDeltaOffset, |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 493 | timing.packetization_finish_delta_ms); |
| 494 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 495 | data.data() + VideoSendTiming::kPacerExitDeltaOffset, |
ilnik | 2edc684 | 2017-07-06 03:06:50 -0700 | [diff] [blame] | 496 | timing.pacer_exit_delta_ms); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 497 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 498 | data.data() + VideoSendTiming::kNetworkTimestampDeltaOffset, |
Danil Chapovalov | f0cc814 | 2017-10-31 17:59:39 +0100 | [diff] [blame] | 499 | timing.network_timestamp_delta_ms); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 500 | ByteWriter<uint16_t>::WriteBigEndian( |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 501 | data.data() + VideoSendTiming::kNetwork2TimestampDeltaOffset, |
Danil Chapovalov | f0cc814 | 2017-10-31 17:59:39 +0100 | [diff] [blame] | 502 | timing.network2_timestamp_delta_ms); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 503 | return true; |
| 504 | } |
| 505 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 506 | bool VideoTimingExtension::Write(rtc::ArrayView<uint8_t> data, |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 507 | uint16_t time_delta_ms, |
sprang | ba050a6 | 2017-08-18 02:51:12 -0700 | [diff] [blame] | 508 | uint8_t offset) { |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 509 | RTC_DCHECK_GE(data.size(), offset + 2); |
Danil Chapovalov | f0cc814 | 2017-10-31 17:59:39 +0100 | [diff] [blame] | 510 | RTC_DCHECK_LE(offset, kValueSizeBytes - sizeof(uint16_t)); |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 511 | ByteWriter<uint16_t>::WriteBigEndian(data.data() + offset, time_delta_ms); |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 512 | return true; |
| 513 | } |
| 514 | |
Johnny Lee | e0c8b23 | 2018-09-11 16:50:49 -0400 | [diff] [blame] | 515 | // Frame Marking. |
| 516 | // |
| 517 | // Meta-information about an RTP stream outside the encrypted media payload, |
| 518 | // useful for an RTP switch to do codec-agnostic selective forwarding |
| 519 | // without decrypting the payload. |
| 520 | // |
| 521 | // For non-scalable streams: |
| 522 | // 0 1 |
| 523 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 |
| 524 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 525 | // | ID | L = 0 |S|E|I|D|0 0 0 0| |
| 526 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 527 | // |
| 528 | // For scalable streams: |
| 529 | // 0 1 2 3 |
| 530 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 531 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 532 | // | ID | L = 2 |S|E|I|D|B| TID | LID | TL0PICIDX | |
| 533 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 534 | |
| 535 | constexpr RTPExtensionType FrameMarkingExtension::kId; |
| 536 | constexpr const char FrameMarkingExtension::kUri[]; |
| 537 | |
| 538 | bool FrameMarkingExtension::IsScalable(uint8_t temporal_id, uint8_t layer_id) { |
| 539 | return temporal_id != kNoTemporalIdx || layer_id != kNoSpatialIdx; |
| 540 | } |
| 541 | |
| 542 | bool FrameMarkingExtension::Parse(rtc::ArrayView<const uint8_t> data, |
| 543 | FrameMarking* frame_marking) { |
| 544 | RTC_DCHECK(frame_marking); |
| 545 | |
| 546 | if (data.size() != 1 && data.size() != 3) |
| 547 | return false; |
| 548 | |
| 549 | frame_marking->start_of_frame = (data[0] & 0x80) != 0; |
| 550 | frame_marking->end_of_frame = (data[0] & 0x40) != 0; |
| 551 | frame_marking->independent_frame = (data[0] & 0x20) != 0; |
| 552 | frame_marking->discardable_frame = (data[0] & 0x10) != 0; |
| 553 | |
| 554 | if (data.size() == 3) { |
| 555 | frame_marking->base_layer_sync = (data[0] & 0x08) != 0; |
| 556 | frame_marking->temporal_id = data[0] & 0x7; |
| 557 | frame_marking->layer_id = data[1]; |
| 558 | frame_marking->tl0_pic_idx = data[2]; |
| 559 | } else { |
| 560 | // non-scalable |
| 561 | frame_marking->base_layer_sync = false; |
| 562 | frame_marking->temporal_id = kNoTemporalIdx; |
| 563 | frame_marking->layer_id = kNoSpatialIdx; |
| 564 | frame_marking->tl0_pic_idx = 0; |
| 565 | } |
| 566 | return true; |
| 567 | } |
| 568 | |
| 569 | size_t FrameMarkingExtension::ValueSize(const FrameMarking& frame_marking) { |
| 570 | if (IsScalable(frame_marking.temporal_id, frame_marking.layer_id)) |
| 571 | return 3; |
| 572 | else |
| 573 | return 1; |
| 574 | } |
| 575 | |
| 576 | bool FrameMarkingExtension::Write(rtc::ArrayView<uint8_t> data, |
| 577 | const FrameMarking& frame_marking) { |
| 578 | RTC_DCHECK_GE(data.size(), 1); |
| 579 | RTC_CHECK_LE(frame_marking.temporal_id, 0x07); |
| 580 | data[0] = frame_marking.start_of_frame ? 0x80 : 0x00; |
| 581 | data[0] |= frame_marking.end_of_frame ? 0x40 : 0x00; |
| 582 | data[0] |= frame_marking.independent_frame ? 0x20 : 0x00; |
| 583 | data[0] |= frame_marking.discardable_frame ? 0x10 : 0x00; |
| 584 | |
| 585 | if (IsScalable(frame_marking.temporal_id, frame_marking.layer_id)) { |
| 586 | RTC_DCHECK_EQ(data.size(), 3); |
| 587 | data[0] |= frame_marking.base_layer_sync ? 0x08 : 0x00; |
| 588 | data[0] |= frame_marking.temporal_id & 0x07; |
| 589 | data[1] = frame_marking.layer_id; |
| 590 | data[2] = frame_marking.tl0_pic_idx; |
| 591 | } |
| 592 | return true; |
| 593 | } |
| 594 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 595 | // Color space including HDR metadata as an optional field. |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 596 | // |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 597 | // RTP header extension to carry color space information and optionally HDR |
| 598 | // metadata. The float values in the HDR metadata struct are upscaled by a |
| 599 | // static factor and transmitted as unsigned integers. |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 600 | // |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 601 | // Data layout of color space with HDR metadata (two-byte RTP header extension) |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 602 | // 0 1 2 3 |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 603 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 604 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 605 | // | ID | length=28 | primaries | transfer | |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 606 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 607 | // | matrix |range+chr.sit. | luminance_max | |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 608 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 609 | // | luminance_min | mastering_metadata.| |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 610 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 611 | // |primary_r.x and .y | mastering_metadata.| |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 612 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 613 | // |primary_g.x and .y | mastering_metadata.| |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 614 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 615 | // |primary_b.x and .y | mastering_metadata.| |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 616 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 617 | // |white.x and .y | max_content_light_level | |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 618 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 619 | // | max_frame_average_light_level | |
| 620 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 621 | // |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 622 | // Data layout of color space w/o HDR metadata (one-byte RTP header extension) |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 623 | // 0 1 2 3 |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 624 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 625 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 626 | // | ID | L = 3 | primaries | transfer | matrix | |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 627 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 628 | // |range+chr.sit. | |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 629 | // +-+-+-+-+-+-+-+-+ |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 630 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 631 | constexpr RTPExtensionType ColorSpaceExtension::kId; |
| 632 | constexpr uint8_t ColorSpaceExtension::kValueSizeBytes; |
| 633 | constexpr const char ColorSpaceExtension::kUri[]; |
| 634 | |
| 635 | bool ColorSpaceExtension::Parse(rtc::ArrayView<const uint8_t> data, |
| 636 | ColorSpace* color_space) { |
| 637 | RTC_DCHECK(color_space); |
| 638 | if (data.size() != kValueSizeBytes && |
| 639 | data.size() != kValueSizeBytesWithoutHdrMetadata) |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 640 | return false; |
| 641 | |
| 642 | size_t offset = 0; |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 643 | // Read color space information. |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 644 | if (!color_space->set_primaries_from_uint8(data[offset++])) |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 645 | return false; |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 646 | if (!color_space->set_transfer_from_uint8(data[offset++])) |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 647 | return false; |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 648 | if (!color_space->set_matrix_from_uint8(data[offset++])) |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 649 | return false; |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 650 | |
| 651 | uint8_t range_and_chroma_siting = data[offset++]; |
| 652 | if (!color_space->set_range_from_uint8((range_and_chroma_siting >> 4) & 0x03)) |
| 653 | return false; |
| 654 | if (!color_space->set_chroma_siting_horizontal_from_uint8( |
| 655 | (range_and_chroma_siting >> 2) & 0x03)) |
| 656 | return false; |
| 657 | if (!color_space->set_chroma_siting_vertical_from_uint8( |
| 658 | range_and_chroma_siting & 0x03)) |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 659 | return false; |
| 660 | |
| 661 | // Read HDR metadata if it exists, otherwise clear it. |
| 662 | if (data.size() == kValueSizeBytesWithoutHdrMetadata) { |
| 663 | color_space->set_hdr_metadata(nullptr); |
| 664 | } else { |
| 665 | HdrMetadata hdr_metadata; |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 666 | offset += ParseHdrMetadata(data.subview(offset), &hdr_metadata); |
| 667 | if (!hdr_metadata.Validate()) |
| 668 | return false; |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 669 | color_space->set_hdr_metadata(&hdr_metadata); |
| 670 | } |
| 671 | RTC_DCHECK_EQ(ValueSize(*color_space), offset); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 672 | return true; |
| 673 | } |
| 674 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 675 | bool ColorSpaceExtension::Write(rtc::ArrayView<uint8_t> data, |
| 676 | const ColorSpace& color_space) { |
Johannes Kron | d0b69a8 | 2018-12-03 14:18:53 +0100 | [diff] [blame] | 677 | RTC_DCHECK_EQ(data.size(), ValueSize(color_space)); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 678 | size_t offset = 0; |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 679 | // Write color space information. |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 680 | data[offset++] = static_cast<uint8_t>(color_space.primaries()); |
| 681 | data[offset++] = static_cast<uint8_t>(color_space.transfer()); |
| 682 | data[offset++] = static_cast<uint8_t>(color_space.matrix()); |
| 683 | data[offset++] = CombineRangeAndChromaSiting( |
| 684 | color_space.range(), color_space.chroma_siting_horizontal(), |
| 685 | color_space.chroma_siting_vertical()); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 686 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 687 | // Write HDR metadata if it exists. |
| 688 | if (color_space.hdr_metadata()) { |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 689 | offset += |
| 690 | WriteHdrMetadata(data.subview(offset), *color_space.hdr_metadata()); |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 691 | } |
| 692 | RTC_DCHECK_EQ(ValueSize(color_space), offset); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 693 | return true; |
| 694 | } |
| 695 | |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 696 | // Combines range and chroma siting into one byte with the following bit layout: |
| 697 | // bits 0-1 Chroma siting vertical. |
| 698 | // 2-3 Chroma siting horizontal. |
| 699 | // 4-5 Range. |
| 700 | // 6-7 Unused. |
| 701 | uint8_t ColorSpaceExtension::CombineRangeAndChromaSiting( |
| 702 | ColorSpace::RangeID range, |
| 703 | ColorSpace::ChromaSiting chroma_siting_horizontal, |
| 704 | ColorSpace::ChromaSiting chroma_siting_vertical) { |
| 705 | RTC_DCHECK_LE(static_cast<uint8_t>(range), 3); |
| 706 | RTC_DCHECK_LE(static_cast<uint8_t>(chroma_siting_horizontal), 3); |
| 707 | RTC_DCHECK_LE(static_cast<uint8_t>(chroma_siting_vertical), 3); |
| 708 | return (static_cast<uint8_t>(range) << 4) | |
| 709 | (static_cast<uint8_t>(chroma_siting_horizontal) << 2) | |
| 710 | static_cast<uint8_t>(chroma_siting_vertical); |
| 711 | } |
| 712 | |
| 713 | size_t ColorSpaceExtension::ParseHdrMetadata(rtc::ArrayView<const uint8_t> data, |
| 714 | HdrMetadata* hdr_metadata) { |
| 715 | RTC_DCHECK_EQ(data.size(), |
| 716 | kValueSizeBytes - kValueSizeBytesWithoutHdrMetadata); |
| 717 | size_t offset = 0; |
| 718 | offset += ParseLuminance(data.data() + offset, |
| 719 | &hdr_metadata->mastering_metadata.luminance_max, |
| 720 | kLuminanceMaxDenominator); |
| 721 | offset += ParseLuminance(data.data() + offset, |
| 722 | &hdr_metadata->mastering_metadata.luminance_min, |
| 723 | kLuminanceMinDenominator); |
| 724 | offset += ParseChromaticity(data.data() + offset, |
| 725 | &hdr_metadata->mastering_metadata.primary_r); |
| 726 | offset += ParseChromaticity(data.data() + offset, |
| 727 | &hdr_metadata->mastering_metadata.primary_g); |
| 728 | offset += ParseChromaticity(data.data() + offset, |
| 729 | &hdr_metadata->mastering_metadata.primary_b); |
| 730 | offset += ParseChromaticity(data.data() + offset, |
| 731 | &hdr_metadata->mastering_metadata.white_point); |
| 732 | hdr_metadata->max_content_light_level = |
| 733 | ByteReader<uint16_t>::ReadBigEndian(data.data() + offset); |
| 734 | offset += 2; |
| 735 | hdr_metadata->max_frame_average_light_level = |
| 736 | ByteReader<uint16_t>::ReadBigEndian(data.data() + offset); |
| 737 | offset += 2; |
| 738 | return offset; |
| 739 | } |
| 740 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 741 | size_t ColorSpaceExtension::ParseChromaticity( |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 742 | const uint8_t* data, |
| 743 | HdrMasteringMetadata::Chromaticity* p) { |
| 744 | uint16_t chromaticity_x_scaled = ByteReader<uint16_t>::ReadBigEndian(data); |
| 745 | uint16_t chromaticity_y_scaled = |
| 746 | ByteReader<uint16_t>::ReadBigEndian(data + 2); |
| 747 | p->x = static_cast<float>(chromaticity_x_scaled) / kChromaticityDenominator; |
| 748 | p->y = static_cast<float>(chromaticity_y_scaled) / kChromaticityDenominator; |
| 749 | return 4; // Return number of bytes read. |
| 750 | } |
| 751 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 752 | size_t ColorSpaceExtension::ParseLuminance(const uint8_t* data, |
| 753 | float* f, |
| 754 | int denominator) { |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 755 | uint16_t luminance_scaled = ByteReader<uint16_t>::ReadBigEndian(data); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 756 | *f = static_cast<float>(luminance_scaled) / denominator; |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 757 | return 2; // Return number of bytes read. |
| 758 | } |
| 759 | |
| 760 | size_t ColorSpaceExtension::WriteHdrMetadata(rtc::ArrayView<uint8_t> data, |
| 761 | const HdrMetadata& hdr_metadata) { |
| 762 | RTC_DCHECK_EQ(data.size(), |
| 763 | kValueSizeBytes - kValueSizeBytesWithoutHdrMetadata); |
| 764 | RTC_DCHECK(hdr_metadata.Validate()); |
| 765 | size_t offset = 0; |
| 766 | offset += WriteLuminance(data.data() + offset, |
| 767 | hdr_metadata.mastering_metadata.luminance_max, |
| 768 | kLuminanceMaxDenominator); |
| 769 | offset += WriteLuminance(data.data() + offset, |
| 770 | hdr_metadata.mastering_metadata.luminance_min, |
| 771 | kLuminanceMinDenominator); |
| 772 | offset += WriteChromaticity(data.data() + offset, |
| 773 | hdr_metadata.mastering_metadata.primary_r); |
| 774 | offset += WriteChromaticity(data.data() + offset, |
| 775 | hdr_metadata.mastering_metadata.primary_g); |
| 776 | offset += WriteChromaticity(data.data() + offset, |
| 777 | hdr_metadata.mastering_metadata.primary_b); |
| 778 | offset += WriteChromaticity(data.data() + offset, |
| 779 | hdr_metadata.mastering_metadata.white_point); |
| 780 | |
| 781 | ByteWriter<uint16_t>::WriteBigEndian(data.data() + offset, |
| 782 | hdr_metadata.max_content_light_level); |
| 783 | offset += 2; |
| 784 | ByteWriter<uint16_t>::WriteBigEndian( |
| 785 | data.data() + offset, hdr_metadata.max_frame_average_light_level); |
| 786 | offset += 2; |
| 787 | return offset; |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 788 | } |
| 789 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 790 | size_t ColorSpaceExtension::WriteChromaticity( |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 791 | uint8_t* data, |
| 792 | const HdrMasteringMetadata::Chromaticity& p) { |
| 793 | RTC_DCHECK_GE(p.x, 0.0f); |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 794 | RTC_DCHECK_LE(p.x, 1.0f); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 795 | RTC_DCHECK_GE(p.y, 0.0f); |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 796 | RTC_DCHECK_LE(p.y, 1.0f); |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 797 | ByteWriter<uint16_t>::WriteBigEndian( |
| 798 | data, std::round(p.x * kChromaticityDenominator)); |
| 799 | ByteWriter<uint16_t>::WriteBigEndian( |
| 800 | data + 2, std::round(p.y * kChromaticityDenominator)); |
| 801 | return 4; // Return number of bytes written. |
| 802 | } |
| 803 | |
Johannes Kron | 09d6588 | 2018-11-27 14:36:41 +0100 | [diff] [blame] | 804 | size_t ColorSpaceExtension::WriteLuminance(uint8_t* data, |
| 805 | float f, |
| 806 | int denominator) { |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 807 | RTC_DCHECK_GE(f, 0.0f); |
Johannes Kron | c13f4be | 2018-12-12 09:52:53 +0100 | [diff] [blame] | 808 | float upscaled_value = f * denominator; |
| 809 | RTC_DCHECK_LE(upscaled_value, std::numeric_limits<uint16_t>::max()); |
| 810 | ByteWriter<uint16_t>::WriteBigEndian(data, std::round(upscaled_value)); |
| 811 | return 2; // Return number of bytes written. |
Johannes Kron | ad1d9f0 | 2018-11-09 11:12:36 +0100 | [diff] [blame] | 812 | } |
| 813 | |
Steve Anton | a3251dd | 2017-07-21 09:58:31 -0700 | [diff] [blame] | 814 | bool BaseRtpStringExtension::Parse(rtc::ArrayView<const uint8_t> data, |
Steve Anton | a3251dd | 2017-07-21 09:58:31 -0700 | [diff] [blame] | 815 | std::string* str) { |
| 816 | if (data.empty() || data[0] == 0) // Valid string extension can't be empty. |
| 817 | return false; |
| 818 | const char* cstr = reinterpret_cast<const char*>(data.data()); |
| 819 | // If there is a \0 character in the middle of the |data|, treat it as end |
| 820 | // of the string. Well-formed string extensions shouldn't contain it. |
| 821 | str->assign(cstr, strnlen(cstr, data.size())); |
| 822 | RTC_DCHECK(!str->empty()); |
| 823 | return true; |
| 824 | } |
| 825 | |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 826 | bool BaseRtpStringExtension::Write(rtc::ArrayView<uint8_t> data, |
| 827 | const std::string& str) { |
Niels Möller | d57efc1 | 2019-03-22 14:02:11 +0100 | [diff] [blame] | 828 | if (str.size() > kMaxValueSizeBytes) { |
Johannes Kron | 78cdde3 | 2018-10-05 10:00:46 +0200 | [diff] [blame] | 829 | return false; |
| 830 | } |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 831 | RTC_DCHECK_EQ(data.size(), str.size()); |
Steve Anton | a3251dd | 2017-07-21 09:58:31 -0700 | [diff] [blame] | 832 | RTC_DCHECK_GE(str.size(), 1); |
Danil Chapovalov | 9bf3158 | 2018-06-18 13:48:20 +0200 | [diff] [blame] | 833 | memcpy(data.data(), str.data(), str.size()); |
Steve Anton | a3251dd | 2017-07-21 09:58:31 -0700 | [diff] [blame] | 834 | return true; |
| 835 | } |
| 836 | |
| 837 | // Constant declarations for string RTP header extension types. |
| 838 | |
danilchap | ef8d773 | 2017-04-19 02:59:48 -0700 | [diff] [blame] | 839 | constexpr RTPExtensionType RtpStreamId::kId; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 840 | constexpr const char RtpStreamId::kUri[]; |
danilchap | ef8d773 | 2017-04-19 02:59:48 -0700 | [diff] [blame] | 841 | |
danilchap | ef8d773 | 2017-04-19 02:59:48 -0700 | [diff] [blame] | 842 | constexpr RTPExtensionType RepairedRtpStreamId::kId; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 843 | constexpr const char RepairedRtpStreamId::kUri[]; |
danilchap | ef8d773 | 2017-04-19 02:59:48 -0700 | [diff] [blame] | 844 | |
Steve Anton | a3251dd | 2017-07-21 09:58:31 -0700 | [diff] [blame] | 845 | constexpr RTPExtensionType RtpMid::kId; |
Steve Anton | d14d9f7 | 2017-07-21 10:59:39 -0700 | [diff] [blame] | 846 | constexpr const char RtpMid::kUri[]; |
erikvarga | e6b1619 | 2017-05-11 02:36:32 -0700 | [diff] [blame] | 847 | |
danilchap | 1edb7ab | 2016-04-20 05:25:10 -0700 | [diff] [blame] | 848 | } // namespace webrtc |