libavcodec/intrax8.h File Reference

#include "get_bits.h"
#include "mpegvideo.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.

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Function Documentation

void ff_intrax8_common_end

(

IntraX8Context *

w

)

Destroy IntraX8 frame structure.

Parameters:

w

pointer to IntraX8Context

Definition at line 708 of file intrax8.c.

Referenced by vc1_decode_end(), and wmv2_decode_end().

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 vc1_decode_init_alloc_tables(), and wmv2_decode_init().

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 MPV_frame_start(), ff_er_frame_start() before calling this function. The parent codec must call ff_er_frame_end(), MPV_frame_end() after calling this function. This function does not use 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 725 of file intrax8.c.

Referenced by ff_wmv2_decode_secondary_picture_header(), and vc1_decode_blocks().