CoreMedia Namespace

Reference

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The CoreMedia namespace provides low-level classes for managing and playing audio and video.

Classes

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.
CMCustomBlockAllocator
CMFormatDescription	Describes media data for audio, video, text and time codes
CMHevcTemporalLevelInfoSettings
CMMemoryPool	Class that manages the repetitive allocation and deallocation of large blocks of memory.
CMSampleBuffer	A container of zero-or-more samples of a particular media type.
CMSampleBufferAttachmentKeyExtensions
CMSampleBufferAttachmentSettings	The keys for CMSampleBuffer attachments.
CMTextMarkupAttributes	Manages the attributes used by AVTextStyleRule.
CMTimebase	Encapsulates an application-controlled timeline.
CMVideoFormatDescription	A CMFormatDescription that describes video.

Structs

CMSampleTimingInfo	Timing information for a CMSampleBuffer.
CMTime	A time value that represents a rational number Value/P:CoreMedia.CMTime.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

ICMAttachmentBearer

Marker interface for type that can bear attachments.

Enums

CMAttachmentMode	Enumerates attachment propagation policies.
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.
CMFormatDescriptionError	An enumeration whose values specify errors relating to CMFormatDescriptions.
CMMediaType	An enumeration whose values specify valid types of media.
CMMetadataFormatType	An enumeration whose values specify types of timed metadata.
CMMuxedStreamType	An enumeration whose values specify valid types of multiplexed media.
CMPixelFormat	Enumerates pixel formats.
CMSampleBufferAttachmentKey
CMSampleBufferError	An enumeration whose values specify errors relating to CMSampleBuffers.
CMSubtitleFormatType	An enumeration whose values specify a subtitling standard.
CMSyncError	An enumeration whose values specify errors returned by GetRelativeRateAndAnchorTime(CMClockOrTimebase, CMClockOrTimebase, Double, CMTime, CMTime).
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

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.

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