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Implement Optimized CropAndScale for ObjCFrameBuffer

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The default implementation of CropAndScale uses ToI420() and then Scale,
and this implementation behaves inefficiently with RTCCVPixelBuffer.

Bug: None
Change-Id: I422ef80d124db0354a2e696892e882a78db445bb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/271140
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Auto-Submit: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37877}
This commit is contained in:
Byoungchan Lee
2022-08-19 07:33:43 +09:00
committed by WebRTC LUCI CQ
parent e0b45c268e
commit 9204302248
6 changed files with 211 additions and 0 deletions
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15
sdk/objc/components/video_frame_buffer/RTCCVPixelBuffer.mm
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@ -153,6 +153,21 @@
return YES;
}
- (id<RTC_OBJC_TYPE(RTCVideoFrameBuffer)>)cropAndScaleWith:(int)offsetX
offsetY:(int)offsetY
cropWidth:(int)cropWidth
cropHeight:(int)cropHeight
scaleWidth:(int)scaleWidth
scaleHeight:(int)scaleHeight {
return [[RTC_OBJC_TYPE(RTCCVPixelBuffer) alloc]
initWithPixelBuffer:_pixelBuffer
adaptedWidth:scaleWidth
adaptedHeight:scaleHeight
cropWidth:cropWidth * _cropWidth / _width
cropHeight:cropHeight * _cropHeight / _height
cropX:_cropX + offsetX * _cropWidth / _width
cropY:_cropY + offsetY * _cropHeight / _height];
}
- (id<RTC_OBJC_TYPE(RTCI420Buffer)>)toI420 {
const OSType pixelFormat = CVPixelBufferGetPixelFormatType(_pixelBuffer);