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1 /* | |
2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #include "webrtc/sdk/objc/Framework/Classes/objcvideotracksource.h" | |
12 | |
13 #import "RTCVideoFrame+Private.h" | |
14 | |
15 #include "webrtc/api/video/i420_buffer.h" | |
16 #include "webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h" | |
17 | |
18 namespace webrtc { | |
19 | |
20 ObjcVideoTrackSource::ObjcVideoTrackSource() {} | |
21 | |
22 void ObjcVideoTrackSource::OnOutputFormatRequest(int width, int height, int fps)
{ | |
23 cricket::VideoFormat format(width, height, cricket::VideoFormat::FpsToInterval
(fps), 0); | |
24 video_adapter()->OnOutputFormatRequest(format); | |
25 } | |
26 | |
27 void ObjcVideoTrackSource::OnCapturedFrame(RTCVideoFrame* frame) { | |
28 const int64_t timestamp_us = frame.timeStampNs / rtc::kNumNanosecsPerMicrosec; | |
29 const int64_t translated_timestamp_us = | |
30 timestamp_aligner_.TranslateTimestamp(timestamp_us, rtc::TimeMicros()); | |
31 | |
32 int adapted_width; | |
33 int adapted_height; | |
34 int crop_width; | |
35 int crop_height; | |
36 int crop_x; | |
37 int crop_y; | |
38 if (!AdaptFrame(frame.width, frame.height, timestamp_us, &adapted_width, &adap
ted_height, | |
39 &crop_width, &crop_height, &crop_x, &crop_y)) { | |
40 return; | |
41 } | |
42 | |
43 rtc::scoped_refptr<VideoFrameBuffer> buffer; | |
44 if (adapted_width == frame.width && adapted_height == frame.height) { | |
45 // No adaption - optimized path. | |
46 buffer = frame.videoBuffer; | |
47 } else if (frame.nativeHandle) { | |
48 // Adapted CVPixelBuffer frame. | |
49 buffer = new rtc::RefCountedObject<CoreVideoFrameBuffer>( | |
50 static_cast<CVPixelBufferRef>(frame.nativeHandle), adapted_width, adapte
d_height, | |
51 crop_width, crop_height, crop_x, crop_y); | |
52 } else { | |
53 // Adapted I420 frame. | |
54 // TODO(magjed): Optimize this I420 path. | |
55 rtc::scoped_refptr<I420Buffer> i420_buffer = I420Buffer::Create(adapted_widt
h, adapted_height); | |
56 i420_buffer->CropAndScaleFrom(*frame.videoBuffer, crop_x, crop_y, crop_width
, crop_height); | |
57 buffer = i420_buffer; | |
58 } | |
59 | |
60 // Applying rotation is only supported for legacy reasons and performance is | |
61 // not critical here. | |
62 webrtc::VideoRotation rotation = static_cast<webrtc::VideoRotation>(frame.rota
tion); | |
63 if (apply_rotation() && rotation != kVideoRotation_0) { | |
64 buffer = I420Buffer::Rotate(*buffer->NativeToI420Buffer(), rotation); | |
65 rotation = kVideoRotation_0; | |
66 } | |
67 | |
68 OnFrame(webrtc::VideoFrame(buffer, rotation, translated_timestamp_us)); | |
69 } | |
70 | |
71 } // namespace webrtc | |
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