Libav 0.7.1
Data Fields
AVHWAccel Struct Reference

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 CodecID id
 Codec implemented by the hardware accelerator.
enum PixelFormat pix_fmt
 Supported pixel format.
int capabilities
 Hardware accelerated codec capabilities.
struct AVHWAccelnext
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.

Detailed Description

AVHWAccel.

Definition at line 2763 of file avcodec.h.


Field Documentation

Hardware accelerated codec capabilities.

see FF_HWACCEL_CODEC_CAP_*

Definition at line 2796 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:
avctxthe codec context
bufthe slice data buffer base
buf_sizethe size of the slice in bytes
Returns:
zero if successful, a negative value otherwise

Definition at line 2827 of file avcodec.h.

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

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:
avctxthe codec context
Returns:
zero if successful, a negative value otherwise

Definition at line 2838 of file avcodec.h.

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

Codec implemented by the hardware accelerator.

See CODEC_ID_xxx

Definition at line 2783 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 2769 of file avcodec.h.

Definition at line 2798 of file avcodec.h.

Referenced by av_hwaccel_next(), and av_register_hwaccel().

Supported pixel format.

Only hardware accelerated formats are supported here.

Definition at line 2790 of file avcodec.h.

Referenced by ff_find_hwaccel().

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 2847 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:
avctxthe codec context
bufthe frame data buffer base
buf_sizethe size of the frame in bytes
Returns:
zero if successful, a negative value otherwise

Definition at line 2814 of file avcodec.h.

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

Type of codec implemented by the hardware accelerator.

See AVMEDIA_TYPE_xxx

Definition at line 2776 of file avcodec.h.


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