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/*
* Copyright (c) 2017 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/test_video_capturer.h"
#include <algorithm>
#include "api/scoped_refptr.h"
#include "api/video/i420_buffer.h"
#include "api/video/video_frame_buffer.h"
#include "api/video/video_rotation.h"
namespace webrtc {
namespace test {
TestVideoCapturer::~TestVideoCapturer() = default;
void TestVideoCapturer::OnOutputFormatRequest(
int width,
int height,
const absl::optional<int>& max_fps) {
absl::optional<std::pair<int, int>> target_aspect_ratio =
std::make_pair(width, height);
absl::optional<int> max_pixel_count = width * height;
video_adapter_.OnOutputFormatRequest(target_aspect_ratio, max_pixel_count,
max_fps);
}
void TestVideoCapturer::OnFrame(const VideoFrame& original_frame) {
int cropped_width = 0;
int cropped_height = 0;
int out_width = 0;
int out_height = 0;
VideoFrame frame = MaybePreprocess(original_frame);
bool enable_adaptation;
{
MutexLock lock(&lock_);
enable_adaptation = enable_adaptation_;
}
if (!enable_adaptation) {
broadcaster_.OnFrame(frame);
return;
}
if (!video_adapter_.AdaptFrameResolution(
frame.width(), frame.height(), frame.timestamp_us() * 1000,
&cropped_width, &cropped_height, &out_width, &out_height)) {
// Drop frame in order to respect frame rate constraint.
return;
}
if (out_height != frame.height() || out_width != frame.width()) {
// Video adapter has requested a down-scale. Allocate a new buffer and
// return scaled version.
// For simplicity, only scale here without cropping.
rtc::scoped_refptr<I420Buffer> scaled_buffer =
I420Buffer::Create(out_width, out_height);
scaled_buffer->ScaleFrom(*frame.video_frame_buffer()->ToI420());
VideoFrame::Builder new_frame_builder =
VideoFrame::Builder()
.set_video_frame_buffer(scaled_buffer)
.set_rotation(kVideoRotation_0)
.set_timestamp_us(frame.timestamp_us())
.set_id(frame.id());
if (frame.has_update_rect()) {
VideoFrame::UpdateRect new_rect = frame.update_rect().ScaleWithFrame(
frame.width(), frame.height(), 0, 0, frame.width(), frame.height(),
out_width, out_height);
new_frame_builder.set_update_rect(new_rect);
}
broadcaster_.OnFrame(new_frame_builder.build());
} else {
// No adaptations needed, just return the frame as is.
broadcaster_.OnFrame(frame);
}
}
rtc::VideoSinkWants TestVideoCapturer::GetSinkWants() {
return broadcaster_.wants();
}
void TestVideoCapturer::AddOrUpdateSink(
rtc::VideoSinkInterface<VideoFrame>* sink,
const rtc::VideoSinkWants& wants) {
broadcaster_.AddOrUpdateSink(sink, wants);
UpdateVideoAdapter();
}
void TestVideoCapturer::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
broadcaster_.RemoveSink(sink);
UpdateVideoAdapter();
}
void TestVideoCapturer::UpdateVideoAdapter() {
video_adapter_.OnSinkWants(broadcaster_.wants());
}
VideoFrame TestVideoCapturer::MaybePreprocess(const VideoFrame& frame) {
MutexLock lock(&lock_);
if (preprocessor_ != nullptr) {
return preprocessor_->Preprocess(frame);
} else {
return frame;
}
}
} // namespace test
} // namespace webrtc
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