VDPAU Decoder and Renderer

VDPAU hardware acceleration has two modules. More...

Files
file	vdpau.h
	Public libavcodec VDPAU header.

Data Structures
union	AVVDPAUPictureInfo
struct	AVVDPAUContext
	This structure is used to share data between the libavcodec library and the client video application. More...
struct	vdpau_render_state
	This structure is used as a callback between the FFmpeg decoder (vd_) and presentation (vo_) module. More...

Macros
#define	FF_VDPAU_STATE_USED_FOR_RENDER   1
	The videoSurface is used for rendering.
#define	FF_VDPAU_STATE_USED_FOR_REFERENCE   2
	The videoSurface is needed for reference/prediction.

Typedefs
typedef int(*	AVVDPAU_Render2 )(struct AVCodecContext *, struct AVFrame *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)

Functions
AVVDPAUContext *	av_alloc_vdpaucontext (void)
	allocation function for AVVDPAUContext
AVVDPAU_Render2	av_vdpau_hwaccel_get_render2 (const AVVDPAUContext *)
void	av_vdpau_hwaccel_set_render2 (AVVDPAUContext *, AVVDPAU_Render2)
AVVDPAUContext *	av_vdpau_alloc_context (void)
	Allocate an AVVDPAUContext.
int	av_vdpau_get_profile (AVCodecContext *avctx, VdpDecoderProfile *profile)
	Get a decoder profile that should be used for initializing a VDPAU decoder.

Detailed Description

VDPAU hardware acceleration has two modules.

• VDPAU decoding
• VDPAU presentation

The VDPAU decoding module parses all headers using FFmpeg parsing mechanisms and uses VDPAU for the actual decoding.

As per the current implementation, the actual decoding and rendering (API calls) are done as part of the VDPAU presentation (vo_vdpau.c) module.

Macro Definition Documentation

#define FF_VDPAU_STATE_USED_FOR_RENDER   1

The videoSurface is used for rendering.

Definition at line 174 of file vdpau.h.

#define FF_VDPAU_STATE_USED_FOR_REFERENCE   2

The videoSurface is needed for reference/prediction.

The codec manipulates this.

Definition at line 180 of file vdpau.h.

Typedef Documentation

typedef int(* AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *, const VdpPictureInfo *, uint32_t, const VdpBitstreamBuffer *)

Definition at line 72 of file vdpau.h.

Function Documentation

AVVDPAUContext* av_alloc_vdpaucontext

(

void

)

allocation function for AVVDPAUContext

Allows extending the struct without breaking API/ABI

Definition at line 41 of file vdpau.c.

AVVDPAU_Render2 av_vdpau_hwaccel_get_render2

(

const AVVDPAUContext *

)

void av_vdpau_hwaccel_set_render2	(	AVVDPAUContext *	,
		AVVDPAU_Render2
	)

AVVDPAUContext* av_vdpau_alloc_context

(

void

)

Allocate an AVVDPAUContext.

Returns

Newly-allocated AVVDPAUContext or NULL on failure.

Definition at line 500 of file vdpau.c.

Referenced by av_alloc_vdpaucontext(), and vdpau_alloc().

int av_vdpau_get_profile	(	AVCodecContext *	avctx,
		VdpDecoderProfile *	profile
	)

Get a decoder profile that should be used for initializing a VDPAU decoder.

Should be called from the AVCodecContext.get_format() callback.

Parameters

avctx	the codec context being used for decoding the stream
profile	a pointer into which the result will be written on success. The contents of profile are undefined if this function returns an error.

Returns

0 on success (non-negative), a negative AVERROR on failure.

Definition at line 457 of file vdpau.c.

Referenced by vdpau_init().