337 lines
18 KiB
C
337 lines
18 KiB
C
/*
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* CVPixelBuffer.h
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* CoreVideo
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*
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* Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
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*
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*/
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/*! @header CVPixelBuffer.h
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@copyright 2004 Apple Computer, Inc. All rights reserved.
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@availability Mac OS X 10.4 or later
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@discussion CVPixelBuffers are CVImageBuffers that hold the pixels in main memory
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*/
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#if !defined(__COREVIDEO_CVPIXELBUFFER_H__)
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#define __COREVIDEO_CVPIXELBUFFER_H__ 1
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#include <TargetConditionals.h>
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#if TARGET_OS_MAC
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#include <QuartzCore/CVImageBuffer.h>
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#include <CoreFoundation/CFArray.h>
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#else
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#pragma warning (disable: 4068) // ignore unknown pragmas
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#include <CVImageBuffer.h>
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#include <CFArray.h>
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#endif
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#pragma mark BufferAttributeKeys
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#if TARGET_OS_MAC
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CV_EXPORT const CFStringRef kCVPixelBufferPixelFormatTypeKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // A single CFNumber or a CFArray of CFNumbers (OSTypes)
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CV_EXPORT const CFStringRef kCVPixelBufferMemoryAllocatorKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFAllocatorRef
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CV_EXPORT const CFStringRef kCVPixelBufferWidthKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferHeightKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferExtendedPixelsLeftKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferExtendedPixelsTopKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferExtendedPixelsRightKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferExtendedPixelsBottomKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferBytesPerRowAlignmentKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFNumber
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CV_EXPORT const CFStringRef kCVPixelBufferCGBitmapContextCompatibilityKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFBoolean
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CV_EXPORT const CFStringRef kCVPixelBufferCGImageCompatibilityKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFBoolean
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CV_EXPORT const CFStringRef kCVPixelBufferOpenGLCompatibilityKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // CFBoolean
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#else
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#define kCVPixelBufferPixelFormatTypeKey CFSTR("PixelFormatType")
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#define kCVPixelBufferMemoryAllocatorKey CFSTR("MemoryAllocator")
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#define kCVPixelBufferWidthKey CFSTR("Width")
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#define kCVPixelBufferHeightKey CFSTR("Height")
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#define kCVPixelBufferExtendedPixelsLeftKey CFSTR("ExtendedPixelsLeft")
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#define kCVPixelBufferExtendedPixelsTopKey CFSTR("ExtendedPixelsTop")
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#define kCVPixelBufferExtendedPixelsRightKey CFSTR("ExtendedPixelsRight")
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#define kCVPixelBufferExtendedPixelsBottomKey CFSTR("ExtendedPixelsBottom")
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#define kCVPixelBufferBytesPerRowAlignmentKey CFSTR("BytesPerRowAlignment")
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#define kCVPixelBufferCGBitmapContextCompatibilityKey CFSTR("CGBitmapContextCompatibility")
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#define kCVPixelBufferCGImageCompatibilityKey CFSTR("CGImageCompatibility")
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#define kCVPixelBufferOpenGLCompatibilityKey CFSTR("OpenGLCompatibility")
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#endif
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/*!
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@typedef CVPixelBufferRef
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@abstract Based on the image buffer type. The pixel buffer implements the memory storage for an image buffer.
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*/
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typedef CVImageBufferRef CVPixelBufferRef;
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CV_EXPORT CFTypeID CVPixelBufferGetTypeID() AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferRetain
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@abstract Retains a CVPixelBuffer object
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@discussion Equivalent to CFRetain, but NULL safe
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@param buffer A CVPixelBuffer object that you want to retain.
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@result A CVPixelBuffer object that is the same as the passed in buffer.
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*/
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CV_EXPORT CVPixelBufferRef CVPixelBufferRetain( CVPixelBufferRef texture ) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferRelease
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@abstract Releases a CVPixelBuffer object
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@discussion Equivalent to CFRelease, but NULL safe
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@param buffer A CVPixelBuffer object that you want to release.
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*/
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CV_EXPORT void CVPixelBufferRelease( CVPixelBufferRef texture ) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferCreateResolvedAttributesDictionary
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@abstract Takes a CFArray of CFDictionary objects describing various pixel buffer attributes and tries to resolve them into a
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single dictionary.
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@discussion This is useful when you need to resolve multiple requirements between different potential clients of a buffer.
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@param attributes CFArray of CFDictionaries containing kCVPixelBuffer key/value pairs.
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@param resolvedDictionaryOut The resulting dictionary will be placed here.
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@result Return value that may be useful in discovering why resolution failed.
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*/
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CV_EXPORT CVReturn CVPixelBufferCreateResolvedAttributesDictionary(CFAllocatorRef allocator, CFArrayRef attributes, CFDictionaryRef *resolvedDictionaryOut) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferCreate
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@abstract Call to create a single PixelBuffer for a given size and pixelFormatType.
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@discussion Creates a single PixelBuffer for a given size and pixelFormatType. It allocates the necessary memory based on the pixel dimensions, pixelFormatType and extended pixels described in the pixelBufferAttributes. Not all parameters of the pixelBufferAttributes will be used here.
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@param width Width of the PixelBuffer in pixels.
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@param height Height of the PixelBuffer in pixels.
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@param pixelFormatType Pixel format indentified by its respective OSType.
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@param pixelBufferAttributes A dictionary with additonal attributes for a a pixel buffer. This parameter is optional. See PixelBufferAttributes for more details.
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@param pixelBufferOut The new pixel buffer will be returned here
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@result returns kCVReturnSuccess on success.
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*/
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CV_EXPORT CVReturn CVPixelBufferCreate(CFAllocatorRef allocator,
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size_t width,
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size_t height,
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OSType pixelFormatType,
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CFDictionaryRef pixelBufferAttributes,
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CVPixelBufferRef *pixelBufferOut) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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typedef void (*CVPixelBufferReleaseBytesCallback)( void *releaseRefCon, const void *baseAddress );
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/*!
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@function CVPixelBufferCreateWithBytes
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@abstract Call to create a single PixelBuffer for a given size and pixelFormatType based on a passed in piece of memory.
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@discussion Creates a single PixelBuffer for a given size and pixelFormatType. Not all parameters of the pixelBufferAttributes will be used here. It requires a release callback function that will be called, when the PixelBuffer gets destroyed so that the owner of the pixels can free the memory.
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@param width Width of the PixelBuffer in pixels
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@param height Height of the PixelBuffer in pixels
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@param pixelFormatType Pixel format indentified by its respective OSType.
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@param baseAddress Address of the memory storing the pixels.
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@param bytesPerRow Row bytes of the pixel storage memory.
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@param releaseCallback CVPixelBufferReleaseBytePointerCallback function that gets called when the PixelBuffer gets destroyed.
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@param releaseRefCon User data identifying the PixelBuffer for the release callback.
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@param pixelBufferAttributes A dictionary with additonal attributes for a a pixel buffer. This parameter is optional. See PixelBufferAttributes for more details.
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@param pixelBufferOut The new pixel buffer will be returned here
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@result returns kCVReturnSuccess on success.
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*/
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CV_EXPORT CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
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size_t width,
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size_t height,
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OSType pixelFormatType,
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void *baseAddress,
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size_t bytesPerRow,
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CVPixelBufferReleaseBytesCallback releaseCallback,
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void *releaseRefCon,
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CFDictionaryRef pixelBufferAttributes,
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CVPixelBufferRef *pixelBufferOut) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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typedef void (*CVPixelBufferReleasePlanarBytesCallback)( void *releaseRefCon, const void *dataPtr, size_t dataSize, size_t numberOfPlanes, const void *planeAddresses[] );
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/*!
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@function CVPixelBufferCreateWithPlanarBytes
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@abstract Call to create a single PixelBuffer in planar format for a given size and pixelFormatType based on a passed in piece of memory.
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@discussion Creates a single PixelBuffer for a given size and pixelFormatType. Not all parameters of the pixelBufferAttributes will be used here. It requires a release callback function that will be called, when the PixelBuffer gets destroyed so that the owner of the pixels can free the memory.
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@param width Width of the PixelBuffer in pixels
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@param height Height of the PixelBuffer in pixels
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@param pixelFormatType Pixel format indentified by its respective OSType.
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@param dataPtr Pass a pointer to a plane descriptor block, or NULL.
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@param dataSize pass size if planes are contiguous, NULL if not.
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@param numberOfPlanes Number of planes.
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@param planeBaseAddress Array of base addresses for the planes.
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@param planeWidth Array of plane widths.
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@param planeHeight Array of plane heights.
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@param planeBytesPerRow Array of plane bytesPerRow values.
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@param releaseCallback CVPixelBufferReleaseBytePointerCallback function that gets called when the PixelBuffer gets destroyed.
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@param releaseRefCon User data identifying the PixelBuffer for the release callback.
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@param pixelBufferAttributes A dictionary with additonal attributes for a a pixel buffer. This parameter is optional. See PixelBufferAttributes for more details.
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@param pixelBufferOut The new pixel buffer will be returned here
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@result returns kCVReturnSuccess on success.
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*/
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CV_EXPORT CVReturn CVPixelBufferCreateWithPlanarBytes(CFAllocatorRef allocator,
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size_t width,
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size_t height,
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OSType pixelFormatType,
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void *dataPtr, // pass a pointer to a plane descriptor block, or NULL
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size_t dataSize, // pass size if planes are contiguous, NULL if not
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size_t numberOfPlanes,
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void *planeBaseAddress[],
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size_t planeWidth[],
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size_t planeHeight[],
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size_t planeBytesPerRow[],
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CVPixelBufferReleasePlanarBytesCallback releaseCallback,
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void *releaseRefCon,
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CFDictionaryRef pixelBufferAttributes,
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CVPixelBufferRef *pixelBufferOut) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferLockBaseAddress
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@abstract Description Locks the BaseAddress of the PixelBuffer to ensure that the is available.
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@param pixelBuffer Target PixelBuffer.
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@param lockFlags No options currently defined, pass 0.
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@result kCVReturnSuccess if the lock succeeded, or error code on failure
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*/
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CV_EXPORT CVReturn CVPixelBufferLockBaseAddress(CVPixelBufferRef pixelBuffer, CVOptionFlags lockFlags) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferUnlockBaseAddress
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@abstract Description Unlocks the BaseAddress of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@param unlockFlags No options currently defined, pass 0.
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@result kCVReturnSuccess if the unlock succeeded, or error code on failure
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*/
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CV_EXPORT CVReturn CVPixelBufferUnlockBaseAddress(CVPixelBufferRef pixelBuffer, CVOptionFlags unlockFlags) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetWidth
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@abstract Returns the width of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result Width in pixels.
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*/
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CV_EXPORT size_t CVPixelBufferGetWidth(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetHeight
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@abstract Returns the height of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result Height in pixels.
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*/
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CV_EXPORT size_t CVPixelBufferGetHeight(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetPixelFormatType
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@abstract Returns the PixelFormatType of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result OSType identifying the pixel format by its type.
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*/
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CV_EXPORT OSType CVPixelBufferGetPixelFormatType(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetBaseAddress
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@abstract Returns the base address of the PixelBuffer.
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@discussion Retrieving the base address for a PixelBuffer requires that the buffer base address be locked
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via a successful call to CVPixelBufferLockBaseAddress.
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@param pixelBuffer Target PixelBuffer.
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@result Base address of the pixels.
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For chunky buffers, this will return a pointer to the pixel at 0,0 in the buffer
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For planar buffers this will return a pointer to a PlanarComponentInfo struct (defined in QuickTime).
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*/
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CV_EXPORT void *CVPixelBufferGetBaseAddress(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetBytesPerRow
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@abstract Returns the rowBytes of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result Bytes per row of the image data. For planar buffers this will return a rowBytes value such that bytesPerRow * height
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will cover the entire image including all planes.
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*/
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CV_EXPORT size_t CVPixelBufferGetBytesPerRow(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetDataSize
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@abstract Returns the data size for contigous planes of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result Data size used in CVPixelBufferCreateWithPlanarBytes.
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*/
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CV_EXPORT size_t CVPixelBufferGetDataSize(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferIsPlanar
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@abstract Returns if the PixelBuffer is planar.
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@param pixelBuffer Target PixelBuffer.
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@result True if the PixelBuffer was created using CVPixelBufferCreateWithPlanarBytes.
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*/
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CV_EXPORT Boolean CVPixelBufferIsPlanar(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetPlaneCount
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@abstract Returns number of planes of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@result Number of planes. Returns 0 for non-planar CVPixelBufferRefs.
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*/
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CV_EXPORT size_t CVPixelBufferGetPlaneCount(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetWidthOfPlane
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@abstract Returns the width of the plane at planeIndex in the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@param planeIndex Identifying the plane.
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@result Width in pixels, or 0 for non-planar CVPixelBufferRefs.
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*/
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CV_EXPORT size_t CVPixelBufferGetWidthOfPlane(CVPixelBufferRef pixelBuffer, size_t planeIndex) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetHeightOfPlane
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@abstract Returns the height of the plane at planeIndex in the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@param planeIndex Identifying the plane.
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@result Height in pixels, or 0 for non-planar CVPixelBufferRefs.
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*/
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CV_EXPORT size_t CVPixelBufferGetHeightOfPlane(CVPixelBufferRef pixelBuffer, size_t planeIndex) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetBaseAddressOfPlane
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@abstract Returns the base address of the plane at planeIndex in the PixelBuffer.
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@discussion Retrieving the base address for a PixelBuffer requires that the buffer base address be locked
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via a successful call to CVPixelBufferLockBaseAddress.
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@param pixelBuffer Target PixelBuffer.
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@param planeIndex Identifying the plane.
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@result Base address of the plane, or NULL for non-planar CVPixelBufferRefs.
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*/
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CV_EXPORT void *CVPixelBufferGetBaseAddressOfPlane(CVPixelBufferRef pixelBuffer, size_t planeIndex) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetBytesPerRowOfPlane
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@abstract Returns the row bytes of the plane at planeIndex in the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@param planeIndex Identifying the plane.
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@result Row bytes of the plane, or NULL for non-planar CVPixelBufferRefs.
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*/
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CV_EXPORT size_t CVPixelBufferGetBytesPerRowOfPlane(CVPixelBufferRef pixelBuffer, size_t planeIndex) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferGetExtendedPixels
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@abstract Returns the size of extended pixels of the PixelBuffer.
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@param pixelBuffer Target PixelBuffer.
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@param extraColumnsOnLeft Returns the pixel row padding to the left. May be NULL.
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@param extraRowsOnTop Returns the pixel row padding to the top. May be NULL.
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@param extraColumnsOnRight Returns the pixel row padding to the right. May be NULL.
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@param extraRowsOnBottom Returns the pixel row padding to the bottom. May be NULL.
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*/
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CV_EXPORT void CVPixelBufferGetExtendedPixels(CVPixelBufferRef pixelBuffer,
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size_t *extraColumnsOnLeft,
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size_t *extraColumnsOnRight,
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size_t *extraRowsOnTop,
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size_t *extraRowsOnBottom) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferFillExtendedPixels
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@abstract Fills the extended pixels of the PixelBuffer with Zero. This function replicates edge pixels to fill the entire extended region of the image.
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@param pixelBuffer Target PixelBuffer.
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*/
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CV_EXPORT CVReturn CVPixelBufferFillExtendedPixels(CVPixelBufferRef pixelBuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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#if defined(__cplusplus)
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}
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#endif
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#endif
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