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/*
* Copyright (c) 2016 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 "modules/video_coding/utility/ivf_file_writer.h"
#include <utility>
#include "api/video_codecs/video_codec.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/video_coding/utility/ivf_defines.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
// TODO(palmkvist): make logging more informative in the absence of a file name
// (or get one)
namespace webrtc {
namespace {
constexpr int kDefaultWidth = 1280;
constexpr int kDefaultHeight = 720;
} // namespace
IvfFileWriter::IvfFileWriter(FileWrapper file, size_t byte_limit)
: codec_type_(kVideoCodecGeneric),
bytes_written_(0),
byte_limit_(byte_limit),
num_frames_(0),
width_(0),
height_(0),
last_timestamp_(-1),
using_capture_timestamps_(false),
file_(std::move(file)) {
RTC_DCHECK(byte_limit == 0 || webrtc::kIvfHeaderSize <= byte_limit)
<< "The byte_limit is too low, not even the header will fit.";
}
IvfFileWriter::~IvfFileWriter() {
Close();
}
std::unique_ptr<IvfFileWriter> IvfFileWriter::Wrap(FileWrapper file,
size_t byte_limit) {
return std::unique_ptr<IvfFileWriter>(
new IvfFileWriter(std::move(file), byte_limit));
}
bool IvfFileWriter::WriteHeader() {
if (!file_.Rewind()) {
RTC_LOG(LS_WARNING) << "Unable to rewind ivf output file.";
return false;
}
uint8_t ivf_header[webrtc::kIvfHeaderSize] = {0};
ivf_header[0] = 'D';
ivf_header[1] = 'K';
ivf_header[2] = 'I';
ivf_header[3] = 'F';
ByteWriter<uint16_t>::WriteLittleEndian(&ivf_header[4], 0); // Version.
ByteWriter<uint16_t>::WriteLittleEndian(&ivf_header[6], 32); // Header size.
switch (codec_type_) {
case kVideoCodecVP8:
ivf_header[8] = 'V';
ivf_header[9] = 'P';
ivf_header[10] = '8';
ivf_header[11] = '0';
break;
case kVideoCodecVP9:
ivf_header[8] = 'V';
ivf_header[9] = 'P';
ivf_header[10] = '9';
ivf_header[11] = '0';
break;
case kVideoCodecAV1:
ivf_header[8] = 'A';
ivf_header[9] = 'V';
ivf_header[10] = '0';
ivf_header[11] = '1';
break;
case kVideoCodecH264:
ivf_header[8] = 'H';
ivf_header[9] = '2';
ivf_header[10] = '6';
ivf_header[11] = '4';
break;
default:
// For unknown codec type use **** code. You can specify actual payload
// format when playing the video with ffplay: ffplay -f H263 file.ivf
ivf_header[8] = '*';
ivf_header[9] = '*';
ivf_header[10] = '*';
ivf_header[11] = '*';
break;
}
ByteWriter<uint16_t>::WriteLittleEndian(&ivf_header[12], width_);
ByteWriter<uint16_t>::WriteLittleEndian(&ivf_header[14], height_);
// Render timestamps are in ms (1/1000 scale), while RTP timestamps use a
// 90kHz clock.
ByteWriter<uint32_t>::WriteLittleEndian(
&ivf_header[16], using_capture_timestamps_ ? 1000 : 90000);
ByteWriter<uint32_t>::WriteLittleEndian(&ivf_header[20], 1);
ByteWriter<uint32_t>::WriteLittleEndian(&ivf_header[24],
static_cast<uint32_t>(num_frames_));
ByteWriter<uint32_t>::WriteLittleEndian(&ivf_header[28], 0); // Reserved.
if (!file_.Write(ivf_header, webrtc::kIvfHeaderSize)) {
RTC_LOG(LS_ERROR) << "Unable to write IVF header for ivf output file.";
return false;
}
if (bytes_written_ < webrtc::kIvfHeaderSize) {
bytes_written_ = webrtc::kIvfHeaderSize;
}
return true;
}
bool IvfFileWriter::InitFromFirstFrame(const EncodedImage& encoded_image,
VideoCodecType codec_type) {
if (encoded_image._encodedWidth == 0 || encoded_image._encodedHeight == 0) {
width_ = kDefaultWidth;
height_ = kDefaultHeight;
} else {
width_ = encoded_image._encodedWidth;
height_ = encoded_image._encodedHeight;
}
using_capture_timestamps_ = encoded_image.Timestamp() == 0;
codec_type_ = codec_type;
if (!WriteHeader())
return false;
const char* codec_name = CodecTypeToPayloadString(codec_type_);
RTC_LOG(LS_WARNING) << "Created IVF file for codec data of type "
<< codec_name << " at resolution " << width_ << " x "
<< height_ << ", using "
<< (using_capture_timestamps_ ? "1" : "90")
<< "kHz clock resolution.";
return true;
}
bool IvfFileWriter::WriteFrame(const EncodedImage& encoded_image,
VideoCodecType codec_type) {
if (!file_.is_open())
return false;
if (num_frames_ == 0 && !InitFromFirstFrame(encoded_image, codec_type))
return false;
RTC_DCHECK_EQ(codec_type_, codec_type);
if ((encoded_image._encodedWidth > 0 || encoded_image._encodedHeight > 0) &&
(encoded_image._encodedHeight != height_ ||
encoded_image._encodedWidth != width_)) {
RTC_LOG(LS_WARNING)
<< "Incoming frame has resolution different from previous: (" << width_
<< "x" << height_ << ") -> (" << encoded_image._encodedWidth << "x"
<< encoded_image._encodedHeight << ")";
}
int64_t timestamp = using_capture_timestamps_
? encoded_image.capture_time_ms_
: wrap_handler_.Unwrap(encoded_image.Timestamp());
if (last_timestamp_ != -1 && timestamp <= last_timestamp_) {
RTC_LOG(LS_WARNING) << "Timestamp no increasing: " << last_timestamp_
<< " -> " << timestamp;
}
last_timestamp_ = timestamp;
bool written_frames = false;
size_t max_sl_index = encoded_image.SpatialIndex().value_or(0);
const uint8_t* data = encoded_image.data();
for (size_t sl_idx = 0; sl_idx <= max_sl_index; ++sl_idx) {
size_t cur_size = encoded_image.SpatialLayerFrameSize(sl_idx).value_or(0);
if (cur_size > 0) {
written_frames = true;
if (!WriteOneSpatialLayer(timestamp, data, cur_size)) {
return false;
}
data += cur_size;
}
}
// If frame has only one spatial layer it won't have any spatial layers'
// sizes. Therefore this case should be addressed separately.
if (!written_frames) {
return WriteOneSpatialLayer(timestamp, data, encoded_image.size());
} else {
return true;
}
}
bool IvfFileWriter::WriteOneSpatialLayer(int64_t timestamp,
const uint8_t* data,
size_t size) {
const size_t kFrameHeaderSize = 12;
if (byte_limit_ != 0 &&
bytes_written_ + kFrameHeaderSize + size > byte_limit_) {
RTC_LOG(LS_WARNING) << "Closing IVF file due to reaching size limit: "
<< byte_limit_ << " bytes.";
Close();
return false;
}
uint8_t frame_header[kFrameHeaderSize] = {};
ByteWriter<uint32_t>::WriteLittleEndian(&frame_header[0],
static_cast<uint32_t>(size));
ByteWriter<uint64_t>::WriteLittleEndian(&frame_header[4], timestamp);
if (!file_.Write(frame_header, kFrameHeaderSize) ||
!file_.Write(data, size)) {
RTC_LOG(LS_ERROR) << "Unable to write frame to file.";
return false;
}
bytes_written_ += kFrameHeaderSize + size;
++num_frames_;
return true;
}
bool IvfFileWriter::Close() {
if (!file_.is_open())
return false;
if (num_frames_ == 0) {
file_.Close();
return true;
}
bool ret = WriteHeader();
file_.Close();
return ret;
}
} // namespace webrtc
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