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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 "sdk/objc/native/src/objc_video_track_source.h"
#import "base/RTCVideoFrame.h"
#import "base/RTCVideoFrameBuffer.h"
#import "components/video_frame_buffer/RTCCVPixelBuffer.h"
#include "api/video/i420_buffer.h"
#include "sdk/objc/native/src/objc_frame_buffer.h"
@interface RTCObjCVideoSourceAdapter ()
@property(nonatomic) webrtc::ObjCVideoTrackSource *objCVideoTrackSource;
@end
@implementation RTCObjCVideoSourceAdapter
@synthesize objCVideoTrackSource = _objCVideoTrackSource;
- (void)capturer:(RTC_OBJC_TYPE(RTCVideoCapturer) *)capturer
didCaptureVideoFrame:(RTC_OBJC_TYPE(RTCVideoFrame) *)frame {
_objCVideoTrackSource->OnCapturedFrame(frame);
}
@end
namespace webrtc {
ObjCVideoTrackSource::ObjCVideoTrackSource() : ObjCVideoTrackSource(false) {}
ObjCVideoTrackSource::ObjCVideoTrackSource(bool is_screencast)
: AdaptedVideoTrackSource(/* required resolution alignment */ 2),
is_screencast_(is_screencast) {}
ObjCVideoTrackSource::ObjCVideoTrackSource(RTCObjCVideoSourceAdapter *adapter) : adapter_(adapter) {
adapter_.objCVideoTrackSource = this;
}
bool ObjCVideoTrackSource::is_screencast() const {
return is_screencast_;
}
absl::optional<bool> ObjCVideoTrackSource::needs_denoising() const {
return false;
}
MediaSourceInterface::SourceState ObjCVideoTrackSource::state() const {
return SourceState::kLive;
}
bool ObjCVideoTrackSource::remote() const {
return false;
}
void ObjCVideoTrackSource::OnOutputFormatRequest(int width, int height, int fps) {
cricket::VideoFormat format(width, height, cricket::VideoFormat::FpsToInterval(fps), 0);
video_adapter()->OnOutputFormatRequest(format);
}
void ObjCVideoTrackSource::OnCapturedFrame(RTC_OBJC_TYPE(RTCVideoFrame) * frame) {
const int64_t timestamp_us = frame.timeStampNs / rtc::kNumNanosecsPerMicrosec;
const int64_t translated_timestamp_us =
timestamp_aligner_.TranslateTimestamp(timestamp_us, rtc::TimeMicros());
int adapted_width;
int adapted_height;
int crop_width;
int crop_height;
int crop_x;
int crop_y;
if (!AdaptFrame(frame.width,
frame.height,
timestamp_us,
&adapted_width,
&adapted_height,
&crop_width,
&crop_height,
&crop_x,
&crop_y)) {
return;
}
rtc::scoped_refptr<VideoFrameBuffer> buffer;
if (adapted_width == frame.width && adapted_height == frame.height) {
// No adaption - optimized path.
buffer = rtc::make_ref_counted<ObjCFrameBuffer>(frame.buffer);
} else if ([frame.buffer isKindOfClass:[RTC_OBJC_TYPE(RTCCVPixelBuffer) class]]) {
// Adapted CVPixelBuffer frame.
RTC_OBJC_TYPE(RTCCVPixelBuffer) *rtcPixelBuffer =
(RTC_OBJC_TYPE(RTCCVPixelBuffer) *)frame.buffer;
buffer = rtc::make_ref_counted<ObjCFrameBuffer>([[RTC_OBJC_TYPE(RTCCVPixelBuffer) alloc]
initWithPixelBuffer:rtcPixelBuffer.pixelBuffer
adaptedWidth:adapted_width
adaptedHeight:adapted_height
cropWidth:crop_width
cropHeight:crop_height
cropX:crop_x + rtcPixelBuffer.cropX
cropY:crop_y + rtcPixelBuffer.cropY]);
} else {
// Adapted I420 frame.
// TODO(magjed): Optimize this I420 path.
rtc::scoped_refptr<I420Buffer> i420_buffer = I420Buffer::Create(adapted_width, adapted_height);
buffer = rtc::make_ref_counted<ObjCFrameBuffer>(frame.buffer);
i420_buffer->CropAndScaleFrom(*buffer->ToI420(), crop_x, crop_y, crop_width, crop_height);
buffer = i420_buffer;
}
// Applying rotation is only supported for legacy reasons and performance is
// not critical here.
VideoRotation rotation = static_cast<VideoRotation>(frame.rotation);
if (apply_rotation() && rotation != kVideoRotation_0) {
buffer = I420Buffer::Rotate(*buffer->ToI420(), rotation);
rotation = kVideoRotation_0;
}
OnFrame(VideoFrame::Builder()
.set_video_frame_buffer(buffer)
.set_rotation(rotation)
.set_timestamp_us(translated_timestamp_us)
.build());
}
} // namespace webrtc
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