AVHWAccel Struct Reference
[Core functions/structures.]

AVHWAccel. More...

#include <avcodec.h>

Data Fields
const char *	name
	Name of the hardware accelerated codec.
enum AVMediaType	type
	Type of codec implemented by the hardware accelerator.
enum AVCodecID	id
	Codec implemented by the hardware accelerator.
enum PixelFormat	pix_fmt
	Supported pixel format.
int	capabilities
	Hardware accelerated codec capabilities.
struct AVHWAccel *	next
int(*	start_frame )(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
	Called at the beginning of each frame or field picture.
int(*	decode_slice )(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
	Callback for each slice.
int(*	end_frame )(AVCodecContext *avctx)
	Called at the end of each frame or field picture.
int	priv_data_size
	Size of HW accelerator private data.

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Detailed Description

AVHWAccel.

Definition at line 3203 of file avcodec.h.

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Field Documentation

int AVHWAccel::capabilities

Hardware accelerated codec capabilities.

see FF_HWACCEL_CODEC_CAP_*

Definition at line 3236 of file avcodec.h.

int(* AVHWAccel::decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)

Callback for each slice.

Meaningful slice information (codec specific) is guaranteed to be parsed at this point. This function is mandatory.

Parameters:

	avctx	the codec context
	buf	the slice data buffer base
	buf_size	the size of the slice in bytes

Returns:

zero if successful, a negative value otherwise

Referenced by decode_nal_units(), decode_slice(), mpeg_decode_slice(), and vc1_decode_frame().

int(* AVHWAccel::end_frame)(AVCodecContext *avctx)

Called at the end of each frame or field picture.

The whole picture is parsed at this point and can now be sent to the hardware accelerator. This function is mandatory.

Parameters:

avctx

the codec context

Returns:

zero if successful, a negative value otherwise

Referenced by ff_h263_decode_frame(), field_end(), mpeg_field_start(), slice_end(), and vc1_decode_frame().

enum AVCodecID AVHWAccel::id

Codec implemented by the hardware accelerator.

See AV_CODEC_ID_xxx

Definition at line 3223 of file avcodec.h.

Referenced by ff_find_hwaccel().

const char* AVHWAccel::name

Name of the hardware accelerated codec.

The name is globally unique among encoders and among decoders (but an encoder and a decoder can share the same name).

Definition at line 3209 of file avcodec.h.

struct AVHWAccel* AVHWAccel::next [read]

Definition at line 3238 of file avcodec.h.

Referenced by av_hwaccel_next(), and av_register_hwaccel().

enum PixelFormat AVHWAccel::pix_fmt

Supported pixel format.

Only hardware accelerated formats are supported here.

Definition at line 3230 of file avcodec.h.

Referenced by ff_find_hwaccel().

int AVHWAccel::priv_data_size

Size of HW accelerator private data.

Private data is allocated with av_mallocz() before AVCodecContext.get_buffer() and deallocated after AVCodecContext.release_buffer().

Definition at line 3287 of file avcodec.h.

Referenced by alloc_frame_buffer().

int(* AVHWAccel::start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)

Called at the beginning of each frame or field picture.

Meaningful frame information (codec specific) is guaranteed to be parsed at this point. This function is mandatory.

Note that buf can be NULL along with buf_size set to 0. Otherwise, this means the whole frame is available at this point.

Parameters:

	avctx	the codec context
	buf	the frame data buffer base
	buf_size	the size of the frame in bytes

Returns:

zero if successful, a negative value otherwise

Referenced by decode_nal_units(), ff_h263_decode_frame(), mpeg_field_start(), and vc1_decode_frame().

enum AVMediaType AVHWAccel::type

Type of codec implemented by the hardware accelerator.

See AVMEDIA_TYPE_xxx

Definition at line 3216 of file avcodec.h.

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The documentation for this struct was generated from the following file:

• libavcodec/avcodec.h