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/*
* Copyright 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.
*/
#import "RTCNativeI420Buffer+Private.h"
#include "api/video/i420_buffer.h"
#if !defined(NDEBUG) && defined(WEBRTC_IOS)
#import <UIKit/UIKit.h>
#include "third_party/libyuv/include/libyuv.h"
#endif
@implementation RTC_OBJC_TYPE (RTCI420Buffer)
- (instancetype)initWithWidth:(int)width height:(int)height {
if (self = [super init]) {
_i420Buffer = webrtc::I420Buffer::Create(width, height);
}
return self;
}
- (instancetype)initWithWidth:(int)width
height:(int)height
dataY:(const uint8_t *)dataY
dataU:(const uint8_t *)dataU
dataV:(const uint8_t *)dataV {
if (self = [super init]) {
_i420Buffer = webrtc::I420Buffer::Copy(
width, height, dataY, width, dataU, (width + 1) / 2, dataV, (width + 1) / 2);
}
return self;
}
- (instancetype)initWithWidth:(int)width
height:(int)height
strideY:(int)strideY
strideU:(int)strideU
strideV:(int)strideV {
if (self = [super init]) {
_i420Buffer = webrtc::I420Buffer::Create(width, height, strideY, strideU, strideV);
}
return self;
}
- (instancetype)initWithFrameBuffer:(rtc::scoped_refptr<webrtc::I420BufferInterface>)i420Buffer {
if (self = [super init]) {
_i420Buffer = i420Buffer;
}
return self;
}
- (int)width {
return _i420Buffer->width();
}
- (int)height {
return _i420Buffer->height();
}
- (int)strideY {
return _i420Buffer->StrideY();
}
- (int)strideU {
return _i420Buffer->StrideU();
}
- (int)strideV {
return _i420Buffer->StrideV();
}
- (int)chromaWidth {
return _i420Buffer->ChromaWidth();
}
- (int)chromaHeight {
return _i420Buffer->ChromaHeight();
}
- (const uint8_t *)dataY {
return _i420Buffer->DataY();
}
- (const uint8_t *)dataU {
return _i420Buffer->DataU();
}
- (const uint8_t *)dataV {
return _i420Buffer->DataV();
}
- (id<RTC_OBJC_TYPE(RTCVideoFrameBuffer)>)cropAndScaleWith:(int)offsetX
offsetY:(int)offsetY
cropWidth:(int)cropWidth
cropHeight:(int)cropHeight
scaleWidth:(int)scaleWidth
scaleHeight:(int)scaleHeight {
rtc::scoped_refptr<webrtc::VideoFrameBuffer> scaled_buffer =
_i420Buffer->CropAndScale(offsetX, offsetY, cropWidth, cropHeight, scaleWidth, scaleHeight);
RTC_DCHECK_EQ(scaled_buffer->type(), webrtc::VideoFrameBuffer::Type::kI420);
// Calling ToI420() doesn't do any conversions.
rtc::scoped_refptr<webrtc::I420BufferInterface> buffer = scaled_buffer->ToI420();
RTC_OBJC_TYPE(RTCI420Buffer) *result =
[[RTC_OBJC_TYPE(RTCI420Buffer) alloc] initWithFrameBuffer:buffer];
return result;
}
- (id<RTC_OBJC_TYPE(RTCI420Buffer)>)toI420 {
return self;
}
#pragma mark - Private
- (rtc::scoped_refptr<webrtc::I420BufferInterface>)nativeI420Buffer {
return _i420Buffer;
}
#pragma mark - Debugging
#if !defined(NDEBUG) && defined(WEBRTC_IOS)
- (id)debugQuickLookObject {
UIGraphicsBeginImageContext(CGSizeMake(_i420Buffer->width(), _i420Buffer->height()));
CGContextRef c = UIGraphicsGetCurrentContext();
uint8_t *ctxData = (uint8_t *)CGBitmapContextGetData(c);
libyuv::I420ToARGB(_i420Buffer->DataY(),
_i420Buffer->StrideY(),
_i420Buffer->DataU(),
_i420Buffer->StrideU(),
_i420Buffer->DataV(),
_i420Buffer->StrideV(),
ctxData,
CGBitmapContextGetBytesPerRow(c),
CGBitmapContextGetWidth(c),
CGBitmapContextGetHeight(c));
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
#endif
@end
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