/*
* Copyright (c) 2018 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 "test/fake_vp8_encoder.h"
#include <algorithm>
#include <optional>
#include "api/video_codecs/video_encoder.h"
#include "api/video_codecs/vp8_temporal_layers.h"
#include "api/video_codecs/vp8_temporal_layers_factory.h"
#include "modules/video_coding/codecs/interface/common_constants.h"
#include "modules/video_coding/include/video_codec_interface.h"
#include "modules/video_coding/include/video_error_codes.h"
#include "modules/video_coding/utility/simulcast_utility.h"
namespace {
// Write width and height to the payload the same way as the real encoder does.
// It requires that `payload` has a size of at least kMinPayLoadHeaderLength.
void WriteFakeVp8(
unsigned char* payload,
int width,
int height,
bool key_frame) {
payload[0] = key_frame ? 0 : 0x01;
if (key_frame) {
payload[9] = (height & 0x3F00) >> 8;
payload[8] = (height & 0x00FF);
payload[7] = (width & 0x3F00) >> 8;
payload[6] = (width & 0x00FF);
}
}
}
// namespace
namespace webrtc {
namespace test {
FakeVp8Encoder::FakeVp8Encoder(
const Environment& env) : FakeEncoder(env) {
sequence_checker_.Detach();
}
int32_t FakeVp8Encoder::InitEncode(
const VideoCodec* config,
const Settings& settings) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
auto result = FakeEncoder::InitEncode(config, settings);
if (result != WEBRTC_VIDEO_CODEC_OK) {
return result;
}
Vp8TemporalLayersFactory factory;
frame_buffer_controller_ =
factory.Create(*config, settings, &fec_controller_override_);
return WEBRTC_VIDEO_CODEC_OK;
}
int32_t FakeVp8Encoder::Release() {
auto result = FakeEncoder::Release();
sequence_checker_.Detach();
return result;
}
CodecSpecificInfo FakeVp8Encoder::PopulateCodecSpecific(
size_t size_bytes,
VideoFrameType frame_type,
int stream_idx,
uint32_t timestamp) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
CodecSpecificInfo codec_specific;
codec_specific.codecType = kVideoCodecVP8;
codec_specific.codecSpecific.VP8.keyIdx = kNoKeyIdx;
codec_specific.codecSpecific.VP8.nonReference =
false;
if (size_bytes > 0) {
frame_buffer_controller_->OnEncodeDone(
stream_idx, timestamp, size_bytes,
frame_type == VideoFrameType::kVideoFrameKey, -1, &codec_specific);
}
else {
frame_buffer_controller_->OnFrameDropped(stream_idx, timestamp);
}
return codec_specific;
}
CodecSpecificInfo FakeVp8Encoder::EncodeHook(
EncodedImage& encoded_image,
rtc::scoped_refptr<EncodedImageBuffer> buffer) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
uint8_t simulcast_index = encoded_image.SimulcastIndex().value_or(0);
frame_buffer_controller_->NextFrameConfig(simulcast_index,
encoded_image.RtpTimestamp());
CodecSpecificInfo codec_specific =
PopulateCodecSpecific(encoded_image.size(), encoded_image._frameType,
simulcast_index, encoded_image.RtpTimestamp());
// Write width and height to the payload the same way as the real encoder
// does.
WriteFakeVp8(buffer->data(), encoded_image._encodedWidth,
encoded_image._encodedHeight,
encoded_image._frameType == VideoFrameType::kVideoFrameKey);
return codec_specific;
}
VideoEncoder::EncoderInfo FakeVp8Encoder::GetEncoderInfo()
const {
EncoderInfo info;
info.implementation_name =
"FakeVp8Encoder";
MutexLock lock(&mutex_);
for (
int sid = 0; sid < config_.numberOfSimulcastStreams; ++sid) {
int number_of_temporal_layers =
config_.simulcastStream[sid].numberOfTemporalLayers;
info.fps_allocation[sid].clear();
for (
int tid = 0; tid < number_of_temporal_layers; ++tid) {
// {1/4, 1/2, 1} allocation for num layers = 3.
info.fps_allocation[sid].push_back(255 /
(number_of_temporal_layers - tid));
}
}
return info;
}
}
// namespace test
}
// namespace webrtc
