VDA

Files
file	vda.h

Classes
struct	vda_context
struct	AVVDAContext

Typedefs
typedef struct AVVDAContext	AVVDAContext

Functions
int	ff_vda_create_decoder (struct vda_context *vda_ctx, uint8_t *extradata, int extradata_size)
int	ff_vda_destroy_decoder (struct vda_context *vda_ctx)
AVVDAContext *	av_vda_alloc_context (void)
int	av_vda_default_init (AVCodecContext *avctx)
int	av_vda_default_init2 (AVCodecContext *avctx, AVVDAContext *vdactx)
void	av_vda_default_free (AVCodecContext *avctx)

Detailed Description

Typedef Documentation

typedef struct AVVDAContext AVVDAContext

This struct holds all the information that needs to be passed between the caller and libavcodec for initializing VDA decoding. Its size is not a part of the public ABI, it must be allocated with av_vda_alloc_context() and freed with av_free().

Function Documentation

AVVDAContext* av_vda_alloc_context

(

void

)

Allocate and initialize a VDA context.

This function should be called from the get_format() callback when the caller selects the AV_PIX_FMT_VDA format. The caller must then create the decoder object (using the output callback provided by libavcodec) that will be used for VDA-accelerated decoding.

When decoding with VDA is finished, the caller must destroy the decoder object and free the VDA context using av_free().

Returns

the newly allocated context or NULL on failure

void av_vda_default_free

(

AVCodecContext *

avctx

)

This function must be called to free the VDA context initialized with av_vda_default_init().

Parameters

avctx

the corresponding codec context

int av_vda_default_init

(

AVCodecContext *

avctx

)

This is a convenience function that creates and sets up the VDA context using an internal implementation.

Parameters

avctx

the corresponding codec context

Returns

>= 0 on success, a negative AVERROR code on failure

int av_vda_default_init2	(	AVCodecContext *	avctx,
		AVVDAContext *	vdactx
	)

This is a convenience function that creates and sets up the VDA context using an internal implementation.

Parameters

avctx	the corresponding codec context
vdactx	the VDA context to use

Returns

>= 0 on success, a negative AVERROR code on failure

int ff_vda_create_decoder	(	struct vda_context *	vda_ctx,
		uint8_t *	extradata,
		int	extradata_size
	)

Create the video decoder.

int ff_vda_destroy_decoder

(

struct vda_context *

vda_ctx

)

Destroy the video decoder.