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65 lines
2.4 KiB
65 lines
2.4 KiB
2 years ago
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// XHVideoOutputSampleBufferFactory.m
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// MessageDisplayExample
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//
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// Created by 曾 宪华 on 14-5-25.
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// Copyright (c) 2014年 嗨，我是曾宪华(@xhzengAIB)，曾加入YY Inc.担任高级移动开发工程师，拍立秀App联合创始人，热衷于简洁、而富有理性的事物 QQ:543413507 主页:http://zengxianhua.com All rights reserved.
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//
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#import "XHVideoOutputSampleBufferFactory.h"
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@implementation XHVideoOutputSampleBufferFactory
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+ (UIImage *)imageFromSampleBuffer:(CMSampleBufferRef)sampleBuffer {
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CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
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// Lock the base address of the pixel buffer
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CVPixelBufferLockBaseAddress(imageBuffer,0);
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// Get the number of bytes per row for the pixel buffer
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size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
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// Get the pixel buffer width and height
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size_t width = CVPixelBufferGetWidth(imageBuffer);
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size_t height = CVPixelBufferGetHeight(imageBuffer);
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// Create a device-dependent RGB color space
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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if (!colorSpace) {
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NSLog(@"CGColorSpaceCreateDeviceRGB failure");
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return nil;
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}
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// Get the base address of the pixel buffer
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void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);
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// Get the data size for contiguous planes of the pixel buffer.
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size_t bufferSize = CVPixelBufferGetDataSize(imageBuffer);
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// Create a Quartz direct-access data provider that uses data we supply
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CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, baseAddress, bufferSize,
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NULL);
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// Create a bitmap image from data supplied by our data provider
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CGImageRef cgImage =
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CGImageCreate(width,
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height,
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8,
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32,
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bytesPerRow,
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colorSpace,
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kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little,
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provider,
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NULL,
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true,
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kCGRenderingIntentDefault);
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CGDataProviderRelease(provider);
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CGColorSpaceRelease(colorSpace);
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// Create and return an image object representing the specified Quartz image
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UIImage *image = [UIImage imageWithCGImage:cgImage];
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CGImageRelease(cgImage);
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CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
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return image;
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}
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@end
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