Libav
Data Fields

#include <avcodec.h>

Data Fields

const char * name
 Name of the hardware accelerated codec. More...
 
enum AVMediaType type
 Type of codec implemented by the hardware accelerator. More...
 
enum AVCodecID id
 Codec implemented by the hardware accelerator. More...
 
enum AVPixelFormat pix_fmt
 Supported pixel format. More...
 
int capabilities
 Hardware accelerated codec capabilities. More...
 
struct AVHWAccelnext
 
int(* alloc_frame )(AVCodecContext *avctx, AVFrame *frame)
 Allocate a custom buffer. More...
 
int(* start_frame )(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
 Called at the beginning of each frame or field picture. More...
 
int(* decode_slice )(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
 Callback for each slice. More...
 
int(* end_frame )(AVCodecContext *avctx)
 Called at the end of each frame or field picture. More...
 
int frame_priv_data_size
 Size of per-frame hardware accelerator private data. More...
 
int(* init )(AVCodecContext *avctx)
 Initialize the hwaccel private data. More...
 
int(* uninit )(AVCodecContext *avctx)
 Uninitialize the hwaccel private data. More...
 
int priv_data_size
 Size of the private data to allocate in AVCodecInternal.hwaccel_priv_data. More...
 

Detailed Description

Definition at line 3238 of file avcodec.h.

Field Documentation

◆ name

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 3244 of file avcodec.h.

Referenced by dxva2_h264_end_frame(), dxva2_hevc_end_frame(), dxva2_mpeg2_end_frame(), dxva2_vc1_end_frame(), vaapi_mpeg4_decode_slice(), vaapi_vc1_decode_slice(), vdpau_mpeg_decode_slice(), and vdpau_vc1_init().

◆ type

enum AVMediaType AVHWAccel::type

Type of codec implemented by the hardware accelerator.

See AVMEDIA_TYPE_xxx

Definition at line 3251 of file avcodec.h.

◆ id

enum AVCodecID AVHWAccel::id

Codec implemented by the hardware accelerator.

See AV_CODEC_ID_xxx

Definition at line 3258 of file avcodec.h.

Referenced by find_hwaccel().

◆ pix_fmt

enum AVPixelFormat AVHWAccel::pix_fmt

Supported pixel format.

Only hardware accelerated formats are supported here.

Definition at line 3265 of file avcodec.h.

Referenced by find_hwaccel().

◆ capabilities

int AVHWAccel::capabilities

Hardware accelerated codec capabilities.

see FF_HWACCEL_CODEC_CAP_*

Definition at line 3271 of file avcodec.h.

◆ next

struct AVHWAccel* AVHWAccel::next

Definition at line 3280 of file avcodec.h.

Referenced by av_hwaccel_next(), and av_register_hwaccel().

◆ alloc_frame

int(* AVHWAccel::alloc_frame) (AVCodecContext *avctx, AVFrame *frame)

Allocate a custom buffer.

Definition at line 3285 of file avcodec.h.

Referenced by ff_get_buffer().

◆ start_frame

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 3301 of file avcodec.h.

Referenced by decode_nal_unit(), ff_h263_decode_frame(), h264_field_start(), mpeg_field_start(), and vc1_decode_frame().

◆ decode_slice

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 3314 of file avcodec.h.

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

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

Definition at line 3325 of file avcodec.h.

Referenced by ff_h263_decode_frame(), ff_h264_field_end(), hevc_decode_frame(), mpeg_field_start(), slice_end(), and vc1_decode_frame().

◆ frame_priv_data_size

int AVHWAccel::frame_priv_data_size

Size of per-frame hardware accelerator private data.

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

Definition at line 3334 of file avcodec.h.

Referenced by alloc_frame(), alloc_frame_buffer(), and alloc_picture().

◆ init

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

Initialize the hwaccel private data.

This will be called from ff_get_format(), after hwaccel and hwaccel_context are set and the hwaccel private data in AVCodecInternal is allocated.

Definition at line 3343 of file avcodec.h.

Referenced by ff_vdpau_common_reinit(), and setup_hwaccel().

◆ uninit

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

Uninitialize the hwaccel private data.

This will be called from get_format() or avcodec_close(), after hwaccel and hwaccel_context are already uninitialized.

Definition at line 3351 of file avcodec.h.

Referenced by avcodec_close(), ff_get_format(), and ff_vdpau_common_reinit().

◆ priv_data_size

int AVHWAccel::priv_data_size

Size of the private data to allocate in AVCodecInternal.hwaccel_priv_data.

Definition at line 3357 of file avcodec.h.

Referenced by setup_hwaccel().


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