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/*
* Copyright 2015 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/api/androidvideocapturer.h"
#include "webrtc/api/java/jni/native_handle_impl.h"
#include "webrtc/base/common.h"
#include "webrtc/base/timeutils.h"
#include "webrtc/media/engine/webrtcvideoframe.h"
namespace webrtc {
// A hack for avoiding deep frame copies in
// cricket::VideoCapturer.SignalFrameCaptured() using a custom FrameFactory.
// A frame is injected using UpdateCapturedFrame(), and converted into a
// cricket::VideoFrame with CreateAliasedFrame(). UpdateCapturedFrame() should
// be called before CreateAliasedFrame() for every frame.
// TODO(magjed): Add an interface cricket::VideoCapturer::OnFrameCaptured()
// for ref counted I420 frames instead of this hack.
class AndroidVideoCapturer::FrameFactory : public cricket::VideoFrameFactory {
public:
explicit FrameFactory(
const rtc::scoped_refptr<AndroidVideoCapturerDelegate>& delegate)
: delegate_(delegate) {
// Create a CapturedFrame that only contains header information, not the
// actual pixel data.
captured_frame_.pixel_height = 1;
captured_frame_.pixel_width = 1;
captured_frame_.data = nullptr;
captured_frame_.data_size = cricket::CapturedFrame::kUnknownDataSize;
captured_frame_.fourcc = static_cast<uint32_t>(cricket::FOURCC_ANY);
}
void UpdateCapturedFrame(
const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& buffer,
int rotation,
int64_t time_stamp_in_ns) {
RTC_DCHECK(rotation == 0 || rotation == 90 || rotation == 180 ||
rotation == 270);
buffer_ = buffer;
captured_frame_.width = buffer->width();
captured_frame_.height = buffer->height();
captured_frame_.time_stamp = time_stamp_in_ns;
captured_frame_.rotation = static_cast<webrtc::VideoRotation>(rotation);
}
void ClearCapturedFrame() {
buffer_ = nullptr;
captured_frame_.width = 0;
captured_frame_.height = 0;
captured_frame_.time_stamp = 0;
}
const cricket::CapturedFrame* GetCapturedFrame() const {
return &captured_frame_;
}
cricket::VideoFrame* CreateAliasedFrame(
const cricket::CapturedFrame* captured_frame,
int dst_width,
int dst_height) const override {
// Check that captured_frame is actually our frame.
RTC_CHECK(captured_frame == &captured_frame_);
RTC_CHECK(buffer_->native_handle() == nullptr);
rtc::scoped_ptr<cricket::VideoFrame> frame(new cricket::WebRtcVideoFrame(
ShallowCenterCrop(buffer_, dst_width, dst_height),
captured_frame->time_stamp, captured_frame->rotation));
// Caller takes ownership.
// TODO(magjed): Change CreateAliasedFrame() to return a rtc::scoped_ptr.
return apply_rotation_ ? frame->GetCopyWithRotationApplied()->Copy()
: frame.release();
}
cricket::VideoFrame* CreateAliasedFrame(
const cricket::CapturedFrame* input_frame,
int cropped_input_width,
int cropped_input_height,
int output_width,
int output_height) const override {
if (buffer_->native_handle() != nullptr) {
// TODO(perkj) Implement cropping.
RTC_CHECK_EQ(cropped_input_width, buffer_->width());
RTC_CHECK_EQ(cropped_input_height, buffer_->height());
rtc::scoped_refptr<webrtc::VideoFrameBuffer> scaled_buffer(
static_cast<webrtc_jni::AndroidTextureBuffer*>(buffer_.get())
->ScaleAndRotate(output_width, output_height,
apply_rotation_ ? input_frame->rotation :
webrtc::kVideoRotation_0));
return new cricket::WebRtcVideoFrame(
scaled_buffer, input_frame->time_stamp,
apply_rotation_ ? webrtc::kVideoRotation_0 : input_frame->rotation);
}
return VideoFrameFactory::CreateAliasedFrame(input_frame,
cropped_input_width,
cropped_input_height,
output_width,
output_height);
}
private:
rtc::scoped_refptr<webrtc::VideoFrameBuffer> buffer_;
cricket::CapturedFrame captured_frame_;
rtc::scoped_refptr<AndroidVideoCapturerDelegate> delegate_;
};
AndroidVideoCapturer::AndroidVideoCapturer(
const rtc::scoped_refptr<AndroidVideoCapturerDelegate>& delegate)
: running_(false),
delegate_(delegate),
frame_factory_(NULL),
current_state_(cricket::CS_STOPPED) {
thread_checker_.DetachFromThread();
SetSupportedFormats(delegate_->GetSupportedFormats());
}
AndroidVideoCapturer::~AndroidVideoCapturer() {
RTC_CHECK(!running_);
}
cricket::CaptureState AndroidVideoCapturer::Start(
const cricket::VideoFormat& capture_format) {
RTC_CHECK(thread_checker_.CalledOnValidThread());
RTC_CHECK(!running_);
const int fps = cricket::VideoFormat::IntervalToFps(capture_format.interval);
LOG(LS_INFO) << " AndroidVideoCapturer::Start " << capture_format.width << "x"
<< capture_format.height << "@" << fps;
frame_factory_ = new AndroidVideoCapturer::FrameFactory(delegate_.get());
set_frame_factory(frame_factory_);
running_ = true;
delegate_->Start(capture_format.width, capture_format.height, fps, this);
SetCaptureFormat(&capture_format);
current_state_ = cricket::CS_STARTING;
return current_state_;
}
void AndroidVideoCapturer::Stop() {
LOG(LS_INFO) << " AndroidVideoCapturer::Stop ";
RTC_CHECK(thread_checker_.CalledOnValidThread());
RTC_CHECK(running_);
running_ = false;
SetCaptureFormat(NULL);
delegate_->Stop();
current_state_ = cricket::CS_STOPPED;
SetCaptureState(current_state_);
}
bool AndroidVideoCapturer::IsRunning() {
RTC_CHECK(thread_checker_.CalledOnValidThread());
return running_;
}
bool AndroidVideoCapturer::GetPreferredFourccs(std::vector<uint32_t>* fourccs) {
RTC_CHECK(thread_checker_.CalledOnValidThread());
fourccs->push_back(cricket::FOURCC_YV12);
return true;
}
void AndroidVideoCapturer::OnCapturerStarted(bool success) {
RTC_CHECK(thread_checker_.CalledOnValidThread());
cricket::CaptureState new_state =
success ? cricket::CS_RUNNING : cricket::CS_FAILED;
if (new_state == current_state_)
return;
current_state_ = new_state;
SetCaptureState(new_state);
}
void AndroidVideoCapturer::OnIncomingFrame(
const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& buffer,
int rotation,
int64_t time_stamp) {
RTC_CHECK(thread_checker_.CalledOnValidThread());
frame_factory_->UpdateCapturedFrame(buffer, rotation, time_stamp);
SignalFrameCaptured(this, frame_factory_->GetCapturedFrame());
frame_factory_->ClearCapturedFrame();
}
void AndroidVideoCapturer::OnOutputFormatRequest(
int width, int height, int fps) {
RTC_CHECK(thread_checker_.CalledOnValidThread());
cricket::VideoFormat format(width, height,
cricket::VideoFormat::FpsToInterval(fps), 0);
video_adapter()->OnOutputFormatRequest(format);
}
bool AndroidVideoCapturer::GetBestCaptureFormat(
const cricket::VideoFormat& desired,
cricket::VideoFormat* best_format) {
// Delegate this choice to VideoCapturer.startCapture().
*best_format = desired;
return true;
}
} // namespace webrtc
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