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/*
* 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.
*/
#include "webrtc/modules/video_coding/frame_buffer.h"
#include <assert.h>
#include <string.h>
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/modules/video_coding/packet.h"
namespace webrtc {
VCMFrameBuffer::VCMFrameBuffer()
:
_state(kStateEmpty),
_nackCount(0),
_latestPacketTimeMs(-1) {
}
VCMFrameBuffer::~VCMFrameBuffer() {
}
VCMFrameBuffer::VCMFrameBuffer(const VCMFrameBuffer& rhs)
:
VCMEncodedFrame(rhs),
_state(rhs._state),
_sessionInfo(),
_nackCount(rhs._nackCount),
_latestPacketTimeMs(rhs._latestPacketTimeMs) {
_sessionInfo = rhs._sessionInfo;
_sessionInfo.UpdateDataPointers(rhs._buffer, _buffer);
}
webrtc::FrameType
VCMFrameBuffer::FrameType() const {
return _sessionInfo.FrameType();
}
int32_t
VCMFrameBuffer::GetLowSeqNum() const {
return _sessionInfo.LowSequenceNumber();
}
int32_t
VCMFrameBuffer::GetHighSeqNum() const {
return _sessionInfo.HighSequenceNumber();
}
int VCMFrameBuffer::PictureId() const {
return _sessionInfo.PictureId();
}
int VCMFrameBuffer::TemporalId() const {
return _sessionInfo.TemporalId();
}
bool VCMFrameBuffer::LayerSync() const {
return _sessionInfo.LayerSync();
}
int VCMFrameBuffer::Tl0PicId() const {
return _sessionInfo.Tl0PicId();
}
bool VCMFrameBuffer::NonReference() const {
return _sessionInfo.NonReference();
}
void VCMFrameBuffer::SetGofInfo(const GofInfoVP9& gof_info, size_t idx) {
_sessionInfo.SetGofInfo(gof_info, idx);
// TODO(asapersson): Consider adding hdr->VP9.ref_picture_id for testing.
_codecSpecificInfo.codecSpecific.VP9.temporal_idx =
gof_info.temporal_idx[idx];
_codecSpecificInfo.codecSpecific.VP9.temporal_up_switch =
gof_info.temporal_up_switch[idx];
}
bool
VCMFrameBuffer::IsSessionComplete() const {
return _sessionInfo.complete();
}
// Insert packet
VCMFrameBufferEnum
VCMFrameBuffer::InsertPacket(const VCMPacket& packet,
int64_t timeInMs,
VCMDecodeErrorMode decode_error_mode,
const FrameData& frame_data) {
assert(!(NULL == packet.dataPtr && packet.sizeBytes > 0));
if (packet.dataPtr != NULL) {
_payloadType = packet.payloadType;
}
if (kStateEmpty == _state) {
// First packet (empty and/or media) inserted into this frame.
// store some info and set some initial values.
_timeStamp = packet.timestamp;
// We only take the ntp timestamp of the first packet of a frame.
ntp_time_ms_ = packet.ntp_time_ms_;
_codec = packet.codec;
if (packet.frameType != kEmptyFrame) {
// first media packet
SetState(kStateIncomplete);
}
}
uint32_t requiredSizeBytes = Length() + packet.sizeBytes +
(packet.insertStartCode ? kH264StartCodeLengthBytes : 0);
if (requiredSizeBytes >= _size) {
const uint8_t* prevBuffer = _buffer;
const uint32_t increments = requiredSizeBytes /
kBufferIncStepSizeBytes +
(requiredSizeBytes %
kBufferIncStepSizeBytes > 0);
const uint32_t newSize = _size +
increments * kBufferIncStepSizeBytes;
if (newSize > kMaxJBFrameSizeBytes) {
LOG(LS_ERROR) << "Failed to insert packet due to frame being too "
"big.";
return kSizeError;
}
VerifyAndAllocate(newSize);
_sessionInfo.UpdateDataPointers(prevBuffer, _buffer);
}
if (packet.width > 0 && packet.height > 0) {
_encodedWidth = packet.width;
_encodedHeight = packet.height;
}
// Don't copy payload specific data for empty packets (e.g padding packets).
if (packet.sizeBytes > 0)
CopyCodecSpecific(&packet.codecSpecificHeader);
int retVal = _sessionInfo.InsertPacket(packet, _buffer,
decode_error_mode,
frame_data);
if (retVal == -1) {
return kSizeError;
} else if (retVal == -2) {
return kDuplicatePacket;
} else if (retVal == -3) {
return kOutOfBoundsPacket;
}
// update length
_length = Length() + static_cast<uint32_t>(retVal);
_latestPacketTimeMs = timeInMs;
// http://www.etsi.org/deliver/etsi_ts/126100_126199/126114/12.07.00_60/
// ts_126114v120700p.pdf Section 7.4.5.
// The MTSI client shall add the payload bytes as defined in this clause
// onto the last RTP packet in each group of packets which make up a key
// frame (I-frame or IDR frame in H.264 (AVC), or an IRAP picture in H.265
// (HEVC)).
if (packet.markerBit) {
RTC_DCHECK(!_rotation_set);
_rotation = packet.codecSpecificHeader.rotation;
_rotation_set = true;
}
if (_sessionInfo.complete()) {
SetState(kStateComplete);
return kCompleteSession;
} else if (_sessionInfo.decodable()) {
SetState(kStateDecodable);
return kDecodableSession;
}
return kIncomplete;
}
int64_t
VCMFrameBuffer::LatestPacketTimeMs() const {
return _latestPacketTimeMs;
}
void
VCMFrameBuffer::IncrementNackCount() {
_nackCount++;
}
int16_t
VCMFrameBuffer::GetNackCount() const {
return _nackCount;
}
bool
VCMFrameBuffer::HaveFirstPacket() const {
return _sessionInfo.HaveFirstPacket();
}
bool
VCMFrameBuffer::HaveLastPacket() const {
return _sessionInfo.HaveLastPacket();
}
int
VCMFrameBuffer::NumPackets() const {
return _sessionInfo.NumPackets();
}
void
VCMFrameBuffer::Reset() {
_length = 0;
_timeStamp = 0;
_sessionInfo.Reset();
_payloadType = 0;
_nackCount = 0;
_latestPacketTimeMs = -1;
_state = kStateEmpty;
VCMEncodedFrame::Reset();
}
// Set state of frame
void
VCMFrameBuffer::SetState(VCMFrameBufferStateEnum state) {
if (_state == state) {
return;
}
switch (state) {
case kStateIncomplete:
// we can go to this state from state kStateEmpty
assert(_state == kStateEmpty);
// Do nothing, we received a packet
break;
case kStateComplete:
assert(_state == kStateEmpty ||
_state == kStateIncomplete ||
_state == kStateDecodable);
break;
case kStateEmpty:
// Should only be set to empty through Reset().
assert(false);
break;
case kStateDecodable:
assert(_state == kStateEmpty ||
_state == kStateIncomplete);
break;
}
_state = state;
}
// Get current state of frame
VCMFrameBufferStateEnum
VCMFrameBuffer::GetState() const {
return _state;
}
// Get current state of frame
VCMFrameBufferStateEnum
VCMFrameBuffer::GetState(uint32_t& timeStamp) const {
timeStamp = TimeStamp();
return GetState();
}
bool
VCMFrameBuffer::IsRetransmitted() const {
return _sessionInfo.session_nack();
}
void
VCMFrameBuffer::PrepareForDecode(bool continuous) {
#ifdef INDEPENDENT_PARTITIONS
if (_codec == kVideoCodecVP8) {
_length =
_sessionInfo.BuildVP8FragmentationHeader(_buffer, _length,
&_fragmentation);
} else {
size_t bytes_removed = _sessionInfo.MakeDecodable();
_length -= bytes_removed;
}
#else
size_t bytes_removed = _sessionInfo.MakeDecodable();
_length -= bytes_removed;
#endif
// Transfer frame information to EncodedFrame and create any codec
// specific information.
_frameType = _sessionInfo.FrameType();
_completeFrame = _sessionInfo.complete();
_missingFrame = !continuous;
}
} // namespace webrtc