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/*
* Copyright (c) 2023 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 "rtc_tools/video_encoder/encoded_image_file_writer.h"
#include "modules/video_coding/svc/scalability_mode_util.h"
#include "rtc_base/logging.h"
namespace webrtc {
namespace test {
EncodedImageFileWriter::EncodedImageFileWriter(
const VideoCodec& video_codec_setting)
: video_codec_setting_(video_codec_setting) {
const char* codec_string =
CodecTypeToPayloadString(video_codec_setting.codecType);
// Retrieve scalability mode information.
std::optional<ScalabilityMode> scalability_mode =
video_codec_setting.GetScalabilityMode();
RTC_CHECK(scalability_mode);
spatial_layers_ = ScalabilityModeToNumSpatialLayers(*scalability_mode);
temporal_layers_ = ScalabilityModeToNumTemporalLayers(*scalability_mode);
inter_layer_pred_mode_ =
ScalabilityModeToInterLayerPredMode(*scalability_mode);
RTC_CHECK_GT(spatial_layers_, 0);
RTC_CHECK_GT(temporal_layers_, 0);
// Create writer for every decode target.
for (int i = 0; i < spatial_layers_; ++i) {
for (int j = 0; j < temporal_layers_; ++j) {
char buffer[256];
SimpleStringBuilder name(buffer);
name << "output-" << codec_string << "-"
<< ScalabilityModeToString(*scalability_mode) << "-L" << i << "T"
<< j << ".ivf";
decode_target_writers_.emplace_back(std::make_pair(
IvfFileWriter::Wrap(FileWrapper::OpenWriteOnly(name.str()), 0),
name.str()));
}
}
}
EncodedImageFileWriter::~EncodedImageFileWriter() {
for (size_t i = 0; i < decode_target_writers_.size(); ++i) {
decode_target_writers_[i].first->Close();
RTC_LOG(LS_INFO) << "Written: " << decode_target_writers_[i].second;
}
}
int EncodedImageFileWriter::Write(const EncodedImage& encoded_image) {
// L1T1 does not set `SpatialIndex` and `TemporalIndex` in `EncodedImage`.
const int spatial_index = encoded_image.SpatialIndex().value_or(0);
const int temporal_index = encoded_image.TemporalIndex().value_or(0);
RTC_CHECK_LT(spatial_index, spatial_layers_);
RTC_CHECK_LT(temporal_index, temporal_layers_);
if (spatial_index == 0) {
is_base_layer_key_frame =
(encoded_image._frameType == VideoFrameType::kVideoFrameKey);
}
switch (inter_layer_pred_mode_) {
case InterLayerPredMode::kOff: {
// Write to this spatial layer.
for (int j = temporal_index; j < temporal_layers_; ++j) {
const int index = spatial_index * temporal_layers_ + j;
RTC_CHECK_LT(index, decode_target_writers_.size());
decode_target_writers_[index].first->WriteFrame(
encoded_image, video_codec_setting_.codecType);
}
break;
}
case InterLayerPredMode::kOn: {
// Write to this and higher spatial layers.
for (int i = spatial_index; i < spatial_layers_; ++i) {
for (int j = temporal_index; j < temporal_layers_; ++j) {
const int index = i * temporal_layers_ + j;
RTC_CHECK_LT(index, decode_target_writers_.size());
decode_target_writers_[index].first->WriteFrame(
encoded_image, video_codec_setting_.codecType);
}
}
break;
}
case InterLayerPredMode::kOnKeyPic: {
for (int i = spatial_index; i < spatial_layers_; ++i) {
for (int j = temporal_index; j < temporal_layers_; ++j) {
const int index = i * temporal_layers_ + j;
RTC_CHECK_LT(index, decode_target_writers_.size());
decode_target_writers_[index].first->WriteFrame(
encoded_image, video_codec_setting_.codecType);
}
// Write to higher spatial layers only if key frame.
if (!is_base_layer_key_frame) {
break;
}
}
break;
}
}
return 0;
}
} // namespace test
} // namespace webrtc
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