#VIDEO DECODER FOR MAC MOVIE#
#VIDEO DECODER FOR MAC FULL#
#VIDEO DECODER FOR MAC CODE#

Pthread_mutex_t queueMutex // mutex protecting queue manipulation Int32_t queueDepth // we will try to keep the queue depth around 10 frames MyDisplayFramePtr displayQueue // display-order queue - next display frame is always at the queue head tracks a frame in and output queue in display order See IOSurface/IOSurfaceAPI.h for the complete list of available IOSurface properties. The hardware decoder requires IOSurface backed image buffers for rendering. If NULL is specified in VDADecoderCreate for the destinationImageBufferAttributes dictionary, this key is assumed to be set. The value for the this key is most often just an empty dictionary. If a destinationImageBufferAttributes dictionary is specified in VDADecoderCreate, that dictionary MUST contain this key.

The presence of this key requests buffer allocation via IOSurface. KCVPixelBufferIOSurfacePropertiesKey - A CFDictionaryRef of IOSurface properties. KCVPixelBufferHeightKey - A CFNumberRef specifying the height of the pixel buffer. KCVPixelBufferWidthKey -A CFNumberRef specifying the width of the pixel buffer. For example, kCVPixelFormatType_422YpCbCr8. KCVPixelBufferPixelFormatTypeKey - A single CFNumberRef (OSType) or an array of CFNumberRef (OSTypes) specifying output pixel format.

#VIDEO DECODER FOR MAC FULL#

Listed are the commonly used keys, for a full list of available Core Video Pixel Buffer keys see CoreVideo/CVPixelBuffer.h

#VIDEO DECODER FOR MAC MOVIE#

In a QuickTime movie file, this is the same data which is stored in the image description as the avcC atom. KVDADecoderConfiguration_avcCData - A CFDataRef containing avcC data from the H.264 bitstream. KVDADecoderConfiguration_SourceFormat - A CFNumberRef ( kCFNumberSInt32Type Four Character Code) specifying source format. KVDADecoderConfiguration_Width - A CFNumberRef specifying source width. KVDADecoderConfiguration_Height - A CFNumberRef specifying source height. The output callback may be called in decode order rather than presentation order.Д«ack to Top Constants Decoder Configuration Keys When creating a VDADecoder object, pass in a VDADecoderOutputCallback function to be used to return decompressed frames. Image buffers are NOT owned by the decoder instance. The client should retain returned image buffers and release them when they are no longer needed. ImageBuffer - A Core Video image buffer containing a decompressed video frame. For example, the kVDADecodeInfo_FrameDropped flag may be set if the frame was dropped. InfoFlags - Contains information about a decode operation.

#VIDEO DECODER FOR MAC CODE#

Status - An error code is returned if decompression was not successful. The client must retain it if it is needed beyond the scope of the output callback. The CFDictionaryRef will be released after returning from the callback. Typedef void (*VDADecoderOutputCallback)(void *decompressionOutputRefCon,ДecompressionOutputRefCon - The user data pointer as passed into VDADecoderCreate for decoderOutputCallbackRefcon.ДЇrameInfo- The frameInfo dictionary passed to VDADecoderDecode for this frame. If hardware doesn't exist to decode the provided format or if there are insufficient hardware resources to perform hardware decoding, the appropriate result code will be returned.Дecoded frames are emitted via the VDADecoderOutputCallback function passed in by the caller. OutputCallback- A VDADecoderOutputCallback function called by the decoder when returning decompressed image buffers to the client.ДecoderOutputCallbackRefcon - A pointer to user data passed to the output callback for all frames from this decoder object.ДecoderOut - On output, the newly created decoder object.Д¬reates an interface for utilizing hardware resources to decode video by returning a VDADecoder object. See Destination Image Buffer Attribute Keys. If NULL is used, the client should make no assumptions regarding the returned image buffers. This parameter may be NULL if the client has no specific preference for the format of the output image buffers. See Decoder Configuration Keys.ДestinationImageBufferAttributes- A CFDictionaryRef describing the clients requirements for output image buffers.

VDADecoderOutputCallback *outputCallback,ДecoderConfiguration - A CFDictionaryRef containing kVDADecoderConfiguratioXXX keys describing the source data and configuration for the decoder. OSStatus VDADecoderCreate(CFDictionaryRef decoderConfiguration,Д¬FDictionaryRef destinationImageBufferAttributes,

Video decoder for mac