1 /*
2 * Copyright (c) 2012 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
11 #include "webrtc/modules/video_coding/frame_buffer.h"
12
13 #include <assert.h>
14 #include <string.h>
15
16 #include "webrtc/base/checks.h"
17 #include "webrtc/base/logging.h"
18 #include "webrtc/modules/video_coding/packet.h"
19
20 namespace webrtc {
21
VCMFrameBuffer()22 VCMFrameBuffer::VCMFrameBuffer()
23 : _state(kStateEmpty), _nackCount(0), _latestPacketTimeMs(-1) {}
24
~VCMFrameBuffer()25 VCMFrameBuffer::~VCMFrameBuffer() {}
26
VCMFrameBuffer(const VCMFrameBuffer & rhs)27 VCMFrameBuffer::VCMFrameBuffer(const VCMFrameBuffer& rhs)
28 : VCMEncodedFrame(rhs),
29 _state(rhs._state),
30 _sessionInfo(),
31 _nackCount(rhs._nackCount),
32 _latestPacketTimeMs(rhs._latestPacketTimeMs) {
33 _sessionInfo = rhs._sessionInfo;
34 _sessionInfo.UpdateDataPointers(rhs._buffer, _buffer);
35 }
36
FrameType() const37 webrtc::FrameType VCMFrameBuffer::FrameType() const {
38 return _sessionInfo.FrameType();
39 }
40
GetLowSeqNum() const41 int32_t VCMFrameBuffer::GetLowSeqNum() const {
42 return _sessionInfo.LowSequenceNumber();
43 }
44
GetHighSeqNum() const45 int32_t VCMFrameBuffer::GetHighSeqNum() const {
46 return _sessionInfo.HighSequenceNumber();
47 }
48
PictureId() const49 int VCMFrameBuffer::PictureId() const {
50 return _sessionInfo.PictureId();
51 }
52
TemporalId() const53 int VCMFrameBuffer::TemporalId() const {
54 return _sessionInfo.TemporalId();
55 }
56
LayerSync() const57 bool VCMFrameBuffer::LayerSync() const {
58 return _sessionInfo.LayerSync();
59 }
60
Tl0PicId() const61 int VCMFrameBuffer::Tl0PicId() const {
62 return _sessionInfo.Tl0PicId();
63 }
64
NonReference() const65 bool VCMFrameBuffer::NonReference() const {
66 return _sessionInfo.NonReference();
67 }
68
SetGofInfo(const GofInfoVP9 & gof_info,size_t idx)69 void VCMFrameBuffer::SetGofInfo(const GofInfoVP9& gof_info, size_t idx) {
70 _sessionInfo.SetGofInfo(gof_info, idx);
71 // TODO(asapersson): Consider adding hdr->VP9.ref_picture_id for testing.
72 _codecSpecificInfo.codecSpecific.VP9.temporal_idx =
73 gof_info.temporal_idx[idx];
74 _codecSpecificInfo.codecSpecific.VP9.temporal_up_switch =
75 gof_info.temporal_up_switch[idx];
76 }
77
IsSessionComplete() const78 bool VCMFrameBuffer::IsSessionComplete() const {
79 return _sessionInfo.complete();
80 }
81
82 // Insert packet
InsertPacket(const VCMPacket & packet,int64_t timeInMs,VCMDecodeErrorMode decode_error_mode,const FrameData & frame_data)83 VCMFrameBufferEnum VCMFrameBuffer::InsertPacket(
84 const VCMPacket& packet,
85 int64_t timeInMs,
86 VCMDecodeErrorMode decode_error_mode,
87 const FrameData& frame_data) {
88 assert(!(NULL == packet.dataPtr && packet.sizeBytes > 0));
89 if (packet.dataPtr != NULL) {
90 _payloadType = packet.payloadType;
91 }
92
93 if (kStateEmpty == _state) {
94 // First packet (empty and/or media) inserted into this frame.
95 // store some info and set some initial values.
96 _timeStamp = packet.timestamp;
97 // We only take the ntp timestamp of the first packet of a frame.
98 ntp_time_ms_ = packet.ntp_time_ms_;
99 _codec = packet.codec;
100 if (packet.frameType != kEmptyFrame) {
101 // first media packet
102 SetState(kStateIncomplete);
103 }
104 }
105
106 uint32_t requiredSizeBytes =
107 Length() + packet.sizeBytes +
108 (packet.insertStartCode ? kH264StartCodeLengthBytes : 0);
109 if (requiredSizeBytes >= _size) {
110 const uint8_t* prevBuffer = _buffer;
111 const uint32_t increments =
112 requiredSizeBytes / kBufferIncStepSizeBytes +
113 (requiredSizeBytes % kBufferIncStepSizeBytes > 0);
114 const uint32_t newSize = _size + increments * kBufferIncStepSizeBytes;
115 if (newSize > kMaxJBFrameSizeBytes) {
116 LOG(LS_ERROR) << "Failed to insert packet due to frame being too "
117 "big.";
118 return kSizeError;
119 }
120 VerifyAndAllocate(newSize);
121 _sessionInfo.UpdateDataPointers(prevBuffer, _buffer);
122 }
123
124 if (packet.width > 0 && packet.height > 0) {
125 _encodedWidth = packet.width;
126 _encodedHeight = packet.height;
127 }
128
129 // Don't copy payload specific data for empty packets (e.g padding packets).
130 if (packet.sizeBytes > 0)
131 CopyCodecSpecific(&packet.codecSpecificHeader);
132
133 int retVal =
134 _sessionInfo.InsertPacket(packet, _buffer, decode_error_mode, frame_data);
135 if (retVal == -1) {
136 return kSizeError;
137 } else if (retVal == -2) {
138 return kDuplicatePacket;
139 } else if (retVal == -3) {
140 return kOutOfBoundsPacket;
141 }
142 // update length
143 _length = Length() + static_cast<uint32_t>(retVal);
144
145 _latestPacketTimeMs = timeInMs;
146
147 // http://www.etsi.org/deliver/etsi_ts/126100_126199/126114/12.07.00_60/
148 // ts_126114v120700p.pdf Section 7.4.5.
149 // The MTSI client shall add the payload bytes as defined in this clause
150 // onto the last RTP packet in each group of packets which make up a key
151 // frame (I-frame or IDR frame in H.264 (AVC), or an IRAP picture in H.265
152 // (HEVC)).
153 if (packet.markerBit) {
154 RTC_DCHECK(!_rotation_set);
155 _rotation = packet.codecSpecificHeader.rotation;
156 _rotation_set = true;
157 }
158
159 if (_sessionInfo.complete()) {
160 SetState(kStateComplete);
161 return kCompleteSession;
162 } else if (_sessionInfo.decodable()) {
163 SetState(kStateDecodable);
164 return kDecodableSession;
165 }
166 return kIncomplete;
167 }
168
LatestPacketTimeMs() const169 int64_t VCMFrameBuffer::LatestPacketTimeMs() const {
170 return _latestPacketTimeMs;
171 }
172
IncrementNackCount()173 void VCMFrameBuffer::IncrementNackCount() {
174 _nackCount++;
175 }
176
GetNackCount() const177 int16_t VCMFrameBuffer::GetNackCount() const {
178 return _nackCount;
179 }
180
HaveFirstPacket() const181 bool VCMFrameBuffer::HaveFirstPacket() const {
182 return _sessionInfo.HaveFirstPacket();
183 }
184
HaveLastPacket() const185 bool VCMFrameBuffer::HaveLastPacket() const {
186 return _sessionInfo.HaveLastPacket();
187 }
188
NumPackets() const189 int VCMFrameBuffer::NumPackets() const {
190 return _sessionInfo.NumPackets();
191 }
192
Reset()193 void VCMFrameBuffer::Reset() {
194 _length = 0;
195 _timeStamp = 0;
196 _sessionInfo.Reset();
197 _payloadType = 0;
198 _nackCount = 0;
199 _latestPacketTimeMs = -1;
200 _state = kStateEmpty;
201 VCMEncodedFrame::Reset();
202 }
203
204 // Set state of frame
SetState(VCMFrameBufferStateEnum state)205 void VCMFrameBuffer::SetState(VCMFrameBufferStateEnum state) {
206 if (_state == state) {
207 return;
208 }
209 switch (state) {
210 case kStateIncomplete:
211 // we can go to this state from state kStateEmpty
212 assert(_state == kStateEmpty);
213
214 // Do nothing, we received a packet
215 break;
216
217 case kStateComplete:
218 assert(_state == kStateEmpty || _state == kStateIncomplete ||
219 _state == kStateDecodable);
220
221 break;
222
223 case kStateEmpty:
224 // Should only be set to empty through Reset().
225 assert(false);
226 break;
227
228 case kStateDecodable:
229 assert(_state == kStateEmpty || _state == kStateIncomplete);
230 break;
231 }
232 _state = state;
233 }
234
235 // Get current state of frame
GetState() const236 VCMFrameBufferStateEnum VCMFrameBuffer::GetState() const {
237 return _state;
238 }
239
240 // Get current state of frame
GetState(uint32_t & timeStamp) const241 VCMFrameBufferStateEnum VCMFrameBuffer::GetState(uint32_t& timeStamp) const {
242 timeStamp = TimeStamp();
243 return GetState();
244 }
245
IsRetransmitted() const246 bool VCMFrameBuffer::IsRetransmitted() const {
247 return _sessionInfo.session_nack();
248 }
249
PrepareForDecode(bool continuous)250 void VCMFrameBuffer::PrepareForDecode(bool continuous) {
251 #ifdef INDEPENDENT_PARTITIONS
252 if (_codec == kVideoCodecVP8) {
253 _length = _sessionInfo.BuildVP8FragmentationHeader(_buffer, _length,
254 &_fragmentation);
255 } else {
256 size_t bytes_removed = _sessionInfo.MakeDecodable();
257 _length -= bytes_removed;
258 }
259 #else
260 size_t bytes_removed = _sessionInfo.MakeDecodable();
261 _length -= bytes_removed;
262 #endif
263 // Transfer frame information to EncodedFrame and create any codec
264 // specific information.
265 _frameType = _sessionInfo.FrameType();
266 _completeFrame = _sessionInfo.complete();
267 _missingFrame = !continuous;
268 }
269
270 } // namespace webrtc
271