VDPAU Decoder and Renderer

Files
file	vdpau.h

Data Structures
struct	AVVDPAUContext
	This structure is used to share data between the libavcodec library and the client video application. More...

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 More...
AVVDPAU_Render2	av_vdpau_hwaccel_get_render2 (const AVVDPAUContext *)
void	av_vdpau_hwaccel_set_render2 (AVVDPAUContext *, AVVDPAU_Render2)
int	av_vdpau_bind_context (AVCodecContext *avctx, VdpDevice device, VdpGetProcAddress *get_proc_address, unsigned flags)
	Associate a VDPAU device with a codec context for hardware acceleration. More...
int	av_vdpau_get_surface_parameters (AVCodecContext *avctx, VdpChromaType *type, uint32_t *width, uint32_t *height)
	Gets the parameters to create an adequate VDPAU video surface for the codec context using VDPAU hardware decoding acceleration. More...
AVVDPAUContext *	av_vdpau_alloc_context (void)
	Allocate an AVVDPAUContext. More...
attribute_deprecated int	av_vdpau_get_profile (AVCodecContext *avctx, VdpDecoderProfile *profile)
	Get a decoder profile that should be used for initializing a VDPAU decoder. More...

Variables
VdpDecoder	AVVDPAUContext::decoder
	VDPAU decoder handle. More...
VdpDecoderRender *	AVVDPAUContext::render
	VDPAU decoder render callback. More...
AVVDPAU_Render2	AVVDPAUContext::render2

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.

Typedef Documentation

AVVDPAU_Render2

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

Definition at line 63 of file vdpau.h.

Function Documentation

av_alloc_vdpaucontext()

AVVDPAUContext* av_alloc_vdpaucontext

(

void

)

allocation function for AVVDPAUContext

Allows extending the struct without breaking API/ABI

Definition at line 67 of file vdpau.c.

av_vdpau_hwaccel_get_render2()

AVVDPAU_Render2 av_vdpau_hwaccel_get_render2

(

const AVVDPAUContext *

)

av_vdpau_hwaccel_set_render2()

void av_vdpau_hwaccel_set_render2	(	AVVDPAUContext *	,
		AVVDPAU_Render2
	)

av_vdpau_bind_context()

int av_vdpau_bind_context	(	AVCodecContext *	avctx,
		VdpDevice	device,
		VdpGetProcAddress *	get_proc_address,
		unsigned	flags
	)

Associate a VDPAU device with a codec context for hardware acceleration.

This function is meant to be called from the get_format() codec callback, or earlier. It can also be called after avcodec_flush_buffers() to change the underlying VDPAU device mid-stream (e.g. to recover from non-transparent display preemption).

Note

get_format() must return AV_PIX_FMT_VDPAU if this function completes successfully.

Parameters

avctx	decoding context whose get_format() callback is invoked
device	VDPAU device handle to use for hardware acceleration
get_proc_address	VDPAU device driver
flags	zero of more OR'd AV_HWACCEL_FLAG_* flags

Returns

0 on success, an AVERROR code on failure.

Definition at line 454 of file vdpau.c.

av_vdpau_get_surface_parameters()

int av_vdpau_get_surface_parameters	(	AVCodecContext *	avctx,
		VdpChromaType *	type,
		uint32_t *	width,
		uint32_t *	height
	)

Gets the parameters to create an adequate VDPAU video surface for the codec context using VDPAU hardware decoding acceleration.

Note

Behavior is undefined if the context was not successfully bound to a VDPAU device using av_vdpau_bind_context().

Parameters

avctx	the codec context being used for decoding the stream
type	storage space for the VDPAU video surface chroma type (or NULL to ignore)
width	storage space for the VDPAU video surface pixel width (or NULL to ignore)
height	storage space for the VDPAU video surface pixel height (or NULL to ignore)

Returns

0 on success, a negative AVERROR code on failure.

Definition at line 74 of file vdpau.c.

Referenced by ff_vdpau_common_frame_params(), and ff_vdpau_common_init().

av_vdpau_alloc_context()

AVVDPAUContext* av_vdpau_alloc_context

(

void

)

Allocate an AVVDPAUContext.

Returns

Newly-allocated AVVDPAUContext or NULL on failure.

Definition at line 449 of file vdpau.c.

Referenced by av_alloc_vdpaucontext().

av_vdpau_get_profile()

attribute_deprecated 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.

Deprecated:

Use av_vdpau_bind_context() instead.

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 401 of file vdpau.c.

Variable Documentation

decoder

VdpDecoder AVVDPAUContext::decoder

VDPAU decoder handle.

Set by user.

Definition at line 87 of file vdpau.h.

Referenced by av_vdpau_bind_context(), and ff_vdpau_common_init().

render

VdpDecoderRender* AVVDPAUContext::render

VDPAU decoder render callback.

Set by the user.

Definition at line 94 of file vdpau.h.

Referenced by ff_vdpau_common_end_frame(), and ff_vdpau_common_init().

render2

AVVDPAU_Render2 AVVDPAUContext::render2

Definition at line 96 of file vdpau.h.

Referenced by ff_vdpau_common_end_frame().