FFmpeg: libavcodec/intrax8.h File Reference

FFmpeg

libavcodec

Data Structures | Functions

intrax8.h File Reference

#include "get_bits.h"
#include "mpegvideo.h"
#include "intrax8dsp.h"
#include "wmv2dsp.h"

Go to the source code of this file.

Data Structures

struct IntraX8Context

Functions

void ff_intrax8_common_init (IntraX8Context *w, MpegEncContext *const s)

Initialize IntraX8 frame decoder.

void ff_intrax8_common_end (IntraX8Context *w)

Destroy IntraX8 frame structure.

int ff_intrax8_decode_picture (IntraX8Context *w, int quant, int halfpq)

Decode single IntraX8 frame.

Function Documentation

void ff_intrax8_common_init ( IntraX8Context * w,

MpegEncContext *const s

)

Initialize IntraX8 frame decoder.

Requires valid MpegEncContext with valid s->mb_width before calling.

Parameters: w pointer to IntraX8Context

s pointer to MpegEncContext of the parent codec

Definition at line 692 of file intrax8.c.

Referenced by ff_vc1_decode_init_alloc_tables(), and wmv2_decode_init().

void ff_intrax8_common_end ( IntraX8Context * w )

Destroy IntraX8 frame structure.

Parameters: w pointer to IntraX8Context

Definition at line 714 of file intrax8.c.

Referenced by ff_vc1_decode_end(), and wmv2_decode_end().

int ff_intrax8_decode_picture ( IntraX8Context *const w,

int dquant,

int quant_offset

)

Decode single IntraX8 frame.

The parent codec must fill s->loopfilter and s->gb (bitstream). The parent codec must call ff_mpv_frame_start(), ff_er_frame_start() before calling this function. The parent codec must call ff_er_frame_end(), ff_mpv_frame_end() after calling this function. This function does not use ff_mpv_decode_mb(). lowres decoding is theoretically impossible.

Parameters: w pointer to IntraX8Context

dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1.

quant_offset offset away from zero

Definition at line 730 of file intrax8.c.

Referenced by ff_vc1_decode_blocks(), and ff_wmv2_decode_secondary_picture_header().

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