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116 lines
4.8 KiB
116 lines
4.8 KiB
5 years ago
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/*
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* CVPixelBufferPool.h
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* CoreVideo
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*
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* Copyright 2004 Apple Computer, Inc. All rights reserved.
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*
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*/
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/*! @header CVPixelBufferPool.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 CVPixelBufferPool is a utility object for managing a set of CVPixelBuffer objects that are going to be recycled.
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*/
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#if !defined(__COREVIDEO__CVPIXELBUFFERPOOL_H__)
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#define __COREVIDEO__CVPIXELBUFFERPOOL_H__ 1
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#include <TargetConditionals.h>
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#if TARGET_OS_MAC
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#include <QuartzCore/CVBase.h>
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#include <QuartzCore/CVReturn.h>
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#include <QuartzCore/CVPixelBuffer.h>
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#else
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#include <CVBase.h>
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#include <CVReturn.h>
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#include <CVPixelBuffer.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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typedef struct __CVPixelBufferPool *CVPixelBufferPoolRef;
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// By default, buffers will age out after one second. If required, setting an age of zero will disable
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// the age-out mechanism completely.
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#if TARGET_OS_MAC
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CV_EXPORT const CFStringRef kCVPixelBufferPoolMinimumBufferCountKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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CV_EXPORT const CFStringRef kCVPixelBufferPoolMaximumBufferAgeKey AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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#else
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#define kCVPixelBufferPoolMinimumBufferCountKey CFSTR("MinimumBufferCount")
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#define kCVPixelBufferPoolMaximumBufferAgeKey CFSTR("MaximumBufferAge")
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#endif
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CV_EXPORT CFTypeID CVPixelBufferPoolGetTypeID() AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferPoolRetain
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@abstract Retains a CVPixelBufferPoolRef object
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@discussion Equivalent to CFRetain, but NULL safe
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@param buffer A CVPixelBufferPoolRef object that you want to retain.
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@result A CVPixelBufferPoolRef object that is the same as the passed in buffer.
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*/
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CV_EXPORT CVPixelBufferPoolRef CVPixelBufferPoolRetain( CVPixelBufferPoolRef pixelBufferPool ) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // NULL-safe
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/*!
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@function CVPixelBufferPoolRelease
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@abstract Releases a CVPixelBufferPoolRef object
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@discussion Equivalent to CFRelease, but NULL safe
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@param buffer A CVPixelBufferPoolRef object that you want to release.
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*/
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CV_EXPORT void CVPixelBufferPoolRelease( CVPixelBufferPoolRef pixelBufferPool ) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER; // NULL-safe
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/*!
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@function CVPixelBufferPoolCreate
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@abstract Creates a new Pixel Buffer pool.
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@param allocator The CFAllocatorRef to use for allocating this buffer pool. May be NULL.
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@param attributes A CFDictionaryRef containing the attributes to be used for creating new PixelBuffers within the pool.
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@param poolOut The newly created pool will be placed here
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@result Returns kCVReturnSuccess on success
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*/
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CV_EXPORT CVReturn CVPixelBufferPoolCreate(CFAllocatorRef allocator,
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CFDictionaryRef poolAttributes,
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CFDictionaryRef pixelBufferAttributes,
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CVPixelBufferPoolRef *poolOut) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferPoolGetAttributes
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@abstract Returns the pool attributes dictionary for a CVPixelBufferPool
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@param pool The CVPixelBufferPoolRef to retrieve the attributes from
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@result Returns the pool attributes dictionary, or NULL on failure.
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*/
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CV_EXPORT CFDictionaryRef CVPixelBufferPoolGetAttributes(CVPixelBufferPoolRef pool) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferPoolGetPixelBufferAttributes
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@abstract Returns the attributes of pixel buffers that will be created from this pool.
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@discussion This function is provided for those cases where you may need to know some information about the buffers that
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will be created up front.
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@param pool The CVPixelBufferPoolRef to retrieve the attributes from
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@result Returns the pixel buffer attributes dictionary, or NULL on failure.
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*/
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CV_EXPORT CFDictionaryRef CVPixelBufferPoolGetPixelBufferAttributes(CVPixelBufferPoolRef pool) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
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/*!
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@function CVPixelBufferPoolCreatePixelBuffer
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@abstract Creates a new PixelBuffer object from the pool.
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@discussion The function creates a new (attachment-free) CVPixelBuffer using the pixel buffer attributes specifed during pool creation.
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@param allocator The CFAllocatorRef to use for creating the pixel buffer. May be NULL.
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@param pool The CVPixelBufferPool that should create the new CVPixelBuffer.
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@param pixelBufferOut The newly created pixel buffer will be placed here
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@result Returns kCVReturnSuccess on success
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*/
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CV_EXPORT CVReturn CVPixelBufferPoolCreatePixelBuffer(CFAllocatorRef allocator,
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CVPixelBufferPoolRef pixelBufferPool,
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CVPixelBufferRef *pixelBufferOut) 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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