MPEG-1/2 decoder. More...

#include "libavutil/attributes.h"
#include "libavutil/thread.h"
#include "mpeg12data.h"
#include "mpeg12dec.h"
#include "mpegutils.h"
#include "rl.h"

Macros
#define	UNCHECKED_BITSTREAM_READER 1

#define	MAX_INDEX (64 - 1)

Functions
av_cold void	ff_init_2d_vlc_rl (const uint16_t table_vlc[][2], RL_VLC_ELEM rl_vlc[], const int8_t table_run[], const uint8_t table_level[], int n, unsigned static_size, int flags)

static av_cold void	mpeg12_init_vlcs (void)

av_cold void	ff_mpeg12_init_vlcs (void)

int	ff_mpeg1_decode_block_intra (GetBitContext gb, const uint16_t quant_matrix, const uint8_t scantable, int last_dc[3], int16_t block, int index, int qscale)

Variables
static const uint8_t	table_mb_ptype [7][2]

static const uint8_t	table_mb_btype [11][2]

static const int16_t	ptype2mb_type [7]

static const int16_t	btype2mb_type [11]

VLCElem	ff_mv_vlc [266]

VLCElem	ff_dc_lum_vlc [512]

VLCElem	ff_dc_chroma_vlc [514]

VLCElem	ff_mbincr_vlc [538]

VLCElem	ff_mb_ptype_vlc [64]

VLCElem	ff_mb_btype_vlc [64]

VLCElem	ff_mb_pat_vlc [512]

RL_VLC_ELEM	ff_mpeg1_rl_vlc [680]

RL_VLC_ELEM	ff_mpeg2_rl_vlc [674]

Detailed Description

MPEG-1/2 decoder.

Definition in file mpeg12.c.

Macro Definition Documentation

◆ UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER 1

Definition at line 28 of file mpeg12.c.

◆ MAX_INDEX

#define MAX_INDEX (64 - 1)

Definition at line 181 of file mpeg12.c.

Referenced by decode_dct_block(), ff_mpeg1_decode_block_intra(), mpeg1_decode_block_inter(), mpeg2_decode_block_intra(), and mpeg2_decode_block_non_intra().

Function Documentation

◆ ff_init_2d_vlc_rl()

av_cold void ff_init_2d_vlc_rl	(	const uint16_t	table_vlc[][2],
		RL_VLC_ELEM	rl_vlc[],
		const int8_t	table_run[],
		const uint8_t	table_level[],
		int	n,
		unsigned	static_size,
		int	flags )

Definition at line 86 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and speedhq_static_init().

◆ mpeg12_init_vlcs()

static av_cold void mpeg12_init_vlcs ( void )

static

Definition at line 140 of file mpeg12.c.

Referenced by ff_mpeg12_init_vlcs().

◆ ff_mpeg12_init_vlcs()

av_cold void ff_mpeg12_init_vlcs ( void )

Definition at line 175 of file mpeg12.c.

Referenced by decode_init(), decode_init(), ipu_decode_init(), mpeg_decode_init(), and tqi_decode_init().

◆ ff_mpeg1_decode_block_intra()

int ff_mpeg1_decode_block_intra	(	GetBitContext *	gb,
		const uint16_t *	quant_matrix,
		const uint8_t *	scantable,
		int	last_dc[3],
		int16_t *	block,
		int	index,
		int	qscale )

Definition at line 183 of file mpeg12.c.

Referenced by ipu_decode_frame(), mpeg_decode_mb(), and tqi_decode_mb().

Variable Documentation

◆ table_mb_ptype

const uint8_t table_mb_ptype[7][2]

static

Initial value:

= {
    { 3, 5 }, 
    { 1, 2 }, 
    { 1, 3 }, 
    { 1, 1 }, 
    { 1, 6 }, 
    { 1, 5 }, 
    { 2, 5 }, 
}

Definition at line 38 of file mpeg12.c.

Referenced by mpeg12_init_vlcs().

◆ table_mb_btype

const uint8_t table_mb_btype[11][2]

static

Initial value:

= {
    { 3, 5 }, 
    { 2, 3 }, 
    { 3, 3 }, 
    { 2, 4 }, 
    { 3, 4 }, 
    { 2, 2 }, 
    { 3, 2 }, 
    { 1, 6 }, 
    { 2, 6 }, 
    { 3, 6 }, 
    { 2, 5 }, 
}

Definition at line 48 of file mpeg12.c.

Referenced by mpeg12_init_vlcs().

◆ ptype2mb_type

const int16_t ptype2mb_type[7]

static

Initial value:

= {
                    MB_TYPE_INTRA,
                    MB_TYPE_FORWARD_MV | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
                    MB_TYPE_FORWARD_MV,
                    MB_TYPE_FORWARD_MV | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_INTRA,
    MB_TYPE_QUANT | MB_TYPE_FORWARD_MV | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
    MB_TYPE_QUANT | MB_TYPE_FORWARD_MV | MB_TYPE_CBP,
}

Definition at line 62 of file mpeg12.c.

Referenced by mpeg12_init_vlcs().

◆ btype2mb_type

const int16_t btype2mb_type[11]

static

Initial value:

= {
                    MB_TYPE_INTRA,
                    MB_TYPE_BACKWARD_MV,
                    MB_TYPE_BACKWARD_MV | MB_TYPE_CBP,
                    MB_TYPE_FORWARD_MV,
                    MB_TYPE_FORWARD_MV  | MB_TYPE_CBP,
                    MB_TYPE_BIDIR_MV,
                    MB_TYPE_BIDIR_MV    | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_INTRA,
    MB_TYPE_QUANT | MB_TYPE_BACKWARD_MV | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_FORWARD_MV  | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_BIDIR_MV    | MB_TYPE_CBP,
}