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/*
* Copyright 2018 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/unittests/frame_buffer_helpers.h"
#include "third_party/libyuv/include/libyuv.h"
void DrawGradientInRGBPixelBuffer(CVPixelBufferRef pixelBuffer) {
CVPixelBufferLockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
void* baseAddr = CVPixelBufferGetBaseAddress(pixelBuffer);
size_t width = CVPixelBufferGetWidth(pixelBuffer);
size_t height = CVPixelBufferGetHeight(pixelBuffer);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
int byteOrder = CVPixelBufferGetPixelFormatType(pixelBuffer) ==
kCVPixelFormatType_32ARGB ?
kCGBitmapByteOrder32Little :
0;
CGContextRef cgContext =
CGBitmapContextCreate(baseAddr,
width,
height,
8,
CVPixelBufferGetBytesPerRow(pixelBuffer),
colorSpace,
byteOrder | kCGImageAlphaNoneSkipLast);
// Create a gradient
CGFloat colors[] = {
1.0,
1.0,
1.0,
1.0,
1.0,
0.0,
0.0,
1.0,
0.0,
1.0,
0.0,
1.0,
0.0,
0.0,
1.0,
1.0,
};
CGGradientRef gradient =
CGGradientCreateWithColorComponents(colorSpace, colors, NULL, 4);
CGContextDrawLinearGradient(
cgContext, gradient, CGPointMake(0, 0), CGPointMake(width, height), 0);
CGGradientRelease(gradient);
CGImageRef cgImage = CGBitmapContextCreateImage(cgContext);
CGContextRelease(cgContext);
CGImageRelease(cgImage);
CGColorSpaceRelease(colorSpace);
CVPixelBufferUnlockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
}
rtc::scoped_refptr<webrtc::I420Buffer> CreateI420Gradient(int width,
int height) {
rtc::scoped_refptr<webrtc::I420Buffer> buffer(
webrtc::I420Buffer::Create(width, height));
// Initialize with gradient, Y = 128(x/w + y/h), U = 256 x/w, V = 256 y/h
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
buffer->MutableDataY()[x + y * width] =
128 * (x * height + y * width) / (width * height);
}
}
int chroma_width = buffer->ChromaWidth();
int chroma_height = buffer->ChromaHeight();
for (int x = 0; x < chroma_width; x++) {
for (int y = 0; y < chroma_height; y++) {
buffer->MutableDataU()[x + y * chroma_width] =
255 * x / (chroma_width - 1);
buffer->MutableDataV()[x + y * chroma_width] =
255 * y / (chroma_height - 1);
}
}
return buffer;
}
void CopyI420BufferToCVPixelBuffer(
rtc::scoped_refptr<webrtc::I420Buffer> i420Buffer,
CVPixelBufferRef pixelBuffer) {
CVPixelBufferLockBaseAddress(pixelBuffer, 0);
const OSType pixelFormat = CVPixelBufferGetPixelFormatType(pixelBuffer);
if (pixelFormat == kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange ||
pixelFormat == kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) {
// NV12
uint8_t* dstY = static_cast<uint8_t*>(
CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0));
const int dstYStride = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0);
uint8_t* dstUV = static_cast<uint8_t*>(
CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1));
const int dstUVStride = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 1);
libyuv::I420ToNV12(i420Buffer->DataY(),
i420Buffer->StrideY(),
i420Buffer->DataU(),
i420Buffer->StrideU(),
i420Buffer->DataV(),
i420Buffer->StrideV(),
dstY,
dstYStride,
dstUV,
dstUVStride,
i420Buffer->width(),
i420Buffer->height());
} else {
uint8_t* dst =
static_cast<uint8_t*>(CVPixelBufferGetBaseAddress(pixelBuffer));
const int bytesPerRow = CVPixelBufferGetBytesPerRow(pixelBuffer);
if (pixelFormat == kCVPixelFormatType_32BGRA) {
// Corresponds to libyuv::FOURCC_ARGB
libyuv::I420ToARGB(i420Buffer->DataY(),
i420Buffer->StrideY(),
i420Buffer->DataU(),
i420Buffer->StrideU(),
i420Buffer->DataV(),
i420Buffer->StrideV(),
dst,
bytesPerRow,
i420Buffer->width(),
i420Buffer->height());
} else if (pixelFormat == kCVPixelFormatType_32ARGB) {
// Corresponds to libyuv::FOURCC_BGRA
libyuv::I420ToBGRA(i420Buffer->DataY(),
i420Buffer->StrideY(),
i420Buffer->DataU(),
i420Buffer->StrideU(),
i420Buffer->DataV(),
i420Buffer->StrideV(),
dst,
bytesPerRow,
i420Buffer->width(),
i420Buffer->height());
}
}
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);
}
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