CoreMedia Namespace

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The CoreMedia namespace provides low-level classes for processing and managing audio and video media data.

Classes

Name	Description
CMAttachmentBearer	Static and extension methods for objects that can bear attachments.
CMAudioFormatDescription	A CMFormatDescription that describes an audio format.
CMBlockBuffer	A contiguous range of data offsets over a possibly non-contiguous memory region.
CMBufferQueue	CoreMedia Buffer Queue.
CMClock	A source of time information, such as the system clock.
CMClockOrTimebase	The base class for CMClock and CMTimebase.
CMCompressionPropertyCameraCalibration
CMCompressionPropertyCameraCalibrationKey
CMCustomBlockAllocator	Provides custom memory allocation for Core Media block buffers.
CMFormatDescription	Describes media data for audio, video, text and time codes
CMFormatDescriptionAlphaChannelModeExtensions	Extension methods for the CMFormatDescriptionAlphaChannelMode enumeration.
CMFormatDescriptionCameraCalibrationExtrinsicOriginSourceExtensions	Extension methods for the CMFormatDescriptionCameraCalibrationExtrinsicOriginSource enumeration.
CMFormatDescriptionCameraCalibrationLensAlgorithmKindExtensions	Extension methods for the CMFormatDescriptionCameraCalibrationLensAlgorithmKind enumeration.
CMFormatDescriptionCameraCalibrationLensDomainExtensions	Extension methods for the CMFormatDescriptionCameraCalibrationLensDomain enumeration.
CMFormatDescriptionCameraCalibrationLensRoleExtensions	Extension methods for the CMFormatDescriptionCameraCalibrationLensRole enumeration.
CMFormatDescriptionChromaLocationExtensions	Extension methods for the CMFormatDescriptionChromaLocation enumeration.
CMFormatDescriptionCleanAperture
CMFormatDescriptionCleanApertureKeys
CMFormatDescriptionColorPrimariesExtensions	Extension methods for the CMFormatDescriptionColorPrimaries enumeration.
CMFormatDescriptionExtensionKeys
CMFormatDescriptionExtensions
CMFormatDescriptionFieldDetailExtensions	Extension methods for the CMFormatDescriptionFieldDetail enumeration.
CMFormatDescriptionHeroEyeExtensions	Extension methods for the CMFormatDescriptionHeroEye enumeration.
CMFormatDescriptionLogTransferFunctionExtensions	Extension methods for the CMFormatDescriptionLogTransferFunction enumeration.
CMFormatDescriptionPixelAspectRatio
CMFormatDescriptionPixelAspectRatioKeys
CMFormatDescriptionProjectionKindExtensions	Extension methods for the CMFormatDescriptionProjectionKind enumeration.
CMFormatDescriptionTransferFunctionExtensions	Extension methods for the CMFormatDescriptionTransferFunction enumeration.
CMFormatDescriptionViewPackingKindExtensions	Extension methods for the CMFormatDescriptionViewPackingKind enumeration.
CMFormatDescriptionYCbCrMatrixExtensions	Extension methods for the CMFormatDescriptionYCbCrMatrix enumeration.
CMHevcTemporalLevelInfoSettings
CMMemoryPool	Class that manages the repetitive allocation and deallocation of large blocks of memory.
CMMetadataBaseDataTypeExtensions	Extension methods for the CMMetadataBaseDataType enumeration.
CMMetadataFormatDescription
CMMetadataFormatDescriptionKeys	Provides keys for Core Media metadata format descriptions.
CMMetadataFormatDescriptionMetadataSpecificationKeys	Provides keys for Core Media metadata format description specifications.
CMMetadataIdentifierExtensions	Extension methods for the CMMetadataIdentifier enumeration.
CMSampleBuffer	A container of zero-or-more samples of a particular media type.
CMSampleBufferAttachmentKeyExtensions	Extension methods for the CMSampleBufferAttachmentKey enumeration.
CMSampleBufferAttachmentSettings	The keys for CMSampleBuffer attachments.
CMTagCollection	An unordered collection of zero or more CMTag values.
CMTaggedBufferGroup	This class contains a list of pixel buffers or sample buffers, where each buffer is associated with a CMTagCollection.
CMTextMarkupAttributes	Manages the attributes used by AVTextStyleRule.
CMTimebase	Encapsulates an application-controlled timeline.
CMVideoFormatDescription	A CMFormatDescription that describes video.

Structs

Name	Description
CMSampleTimingInfo	Timing information for a CMSampleBuffer.
CMTag	A structure that is used to add additional data (tags) to a resource.
CMTime	A time value that represents a rational number Value/TimeScale.
CMTimeMapping	Specifies a mapping between a source CMTimeRange and a target CMTimeRange.
CMTimeRange	A duration of time.
CMTimeScale	A value to be used as a denominator in a CMTime calculation.
CMVideoDimensions	Struct that contains the width and height of video media.
TextMarkupColor	A color to be used with BackgroundColor and ForegroundColor.

Interfaces

Name	Description
ICMAttachmentBearer	Marker interface for type that can bear attachments.

Enums

Name	Description
CMAttachmentMode	Enumerates attachment propagation policies.
CMAudioCodecType
CMBlockBufferError	An enumeration whose values specify errors relating to CMBlockBuffers.
CMBlockBufferFlags	An enumeration of flags to be used with CreateEmpty(UInt32, CMBlockBufferFlags, CMBlockBufferError).
CMBufferQueue.TriggerCondition	Enumerates trigger conditions for a buffer queue trigger.
CMClockError	An enumeration whose values specify errors relating to CMClocks.
CMClosedCaptionFormatType	An enumeration whose values specify a closed-captioning standard.
CMFormatDescriptionAlphaChannelMode
CMFormatDescriptionCameraCalibrationExtrinsicOriginSource
CMFormatDescriptionCameraCalibrationLensAlgorithmKind
CMFormatDescriptionCameraCalibrationLensDomain
CMFormatDescriptionCameraCalibrationLensRole
CMFormatDescriptionChromaLocation
CMFormatDescriptionColorPrimaries
CMFormatDescriptionError	An enumeration whose values specify errors relating to CMFormatDescriptions.
CMFormatDescriptionFieldDetail
CMFormatDescriptionHeroEye
CMFormatDescriptionLogTransferFunction
CMFormatDescriptionProjectionKind
CMFormatDescriptionTransferFunction
CMFormatDescriptionViewPackingKind
CMFormatDescriptionYCbCrMatrix
CMMediaSubType	This enum contains most values that can be returned from MediaSubType.
CMMediaType	An enumeration whose values specify valid types of media.
CMMetadataBaseDataType
CMMetadataFormatType	An enumeration whose values specify types of timed metadata.
CMMetadataIdentifier
CMMPEG2VideoProfile
CMMuxedStreamType	An enumeration whose values specify valid types of multiplexed media.
CMPackingType
CMPixelFormat	Enumerates pixel formats.
CMProjectionType
CMSampleBufferAttachmentKey
CMSampleBufferError	An enumeration whose values specify errors relating to CMSampleBuffers.
CMStereoViewComponents
CMStereoViewInterpretationOptions
CMSubtitleFormatType	An enumeration whose values specify a subtitling standard.
CMSyncError	An enumeration whose values specify errors returned by GetRelativeRateAndAnchorTime(CMClockOrTimebase, CMClockOrTimebase, Double, CMTime, CMTime).
CMTagCategory
CMTagCollectionError
CMTagDataType
CMTagError
CMTaggedBufferGroupError
CMTaggedBufferGroupFormatType
CMTextFormatType
CMTime.Flags	An enumeration whose values are flags used by CMTime.
CMTimebaseError	An enumeration whose values specify errors relating to CMTimebases.
CMTimeCodeFormatType	An enumeration whose values specify the type of a time code.
CMTimeRoundingMethod	An enumeration whose values specify the rounding method to be used with a CMTime.
CMVideoCodecType	An enumeration whose values specify types of video codecs.
LensStabilizationStatus

Delegates

Name	Description
CMBufferCompare	Delegate signature to compare two CoreFoundation objects, used to sort objects in a CMBufferQueue.
CMBufferGetBool	Delegate signature to determine if the specified buffer that is about to be dequeued is ready.
CMBufferGetSize	Delegate for getting media buffer sizes.
CMBufferGetTime	Returns the CMTime object for the specified buffer.
CMTagCollectionApplyFunction	A delegate that is used to iterate over a CMTagCollection.
CMTagCollectionTagFilterFunction	A delegate that is used to filter when iterating over a CMTagCollection.