MPEG-1/2 decoder. More...

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/timecode.h"
#include "internal.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "error_resilience.h"
#include "mpeg12.h"
#include "mpeg12data.h"
#include "mpegvideodata.h"
#include "bytestream.h"
#include "vdpau_internal.h"
#include "thread.h"

Macros
#define	UNCHECKED_BITSTREAM_READER 1

#define	INIT_2D_VLC_RL(rl, static_size)

#define	MAX_INDEX (64 - 1)

Functions
static av_cold void	init_2d_vlc_rl (RLTable *rl, unsigned static_size)

av_cold void	ff_mpeg12_common_init (MpegEncContext *s)

void	ff_mpeg1_clean_buffers (MpegEncContext *s)

av_cold void	ff_mpeg12_init_vlcs (void)

int	ff_mpeg1_find_frame_end (ParseContext pc, const uint8_t buf, int buf_size, AVCodecParserContext *s)
	Find the end of the current frame in the bitstream. More...

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

Variables
uint8_t	ff_mpeg12_static_rl_table_store [2][2][2 *MAX_RUN+MAX_LEVEL+3]

static const uint8_t	table_mb_ptype [7][2]

static const uint8_t	table_mb_btype [11][2]

VLC	ff_mv_vlc

VLC	ff_dc_lum_vlc

VLC	ff_dc_chroma_vlc

VLC	ff_mbincr_vlc

VLC	ff_mb_ptype_vlc

VLC	ff_mb_btype_vlc

VLC	ff_mb_pat_vlc

Detailed Description

MPEG-1/2 decoder.

Definition in file mpeg12.c.

Macro Definition Documentation

#define UNCHECKED_BITSTREAM_READER 1

Definition at line 28 of file mpeg12.c.

#define INIT_2D_VLC_RL	(	rl,
		static_size
	)

Value:

{\
    static RL_VLC_ELEM rl_vlc_table[static_size];\
    rl.rl_vlc[0] = rl_vlc_table;\
    init_2d_vlc_rl(&rl, static_size);\
}

Definition at line 71 of file mpeg12.c.

Referenced by ff_mpeg12_init_vlcs().

#define MAX_INDEX (64 - 1)

Definition at line 246 of file mpeg12.c.

Referenced by ff_mpeg1_decode_block_intra().

Function Documentation

static av_cold void init_2d_vlc_rl	(	RLTable *	rl,
		unsigned	static_size
	)

static

Definition at line 78 of file mpeg12.c.

av_cold void ff_mpeg12_common_init ( MpegEncContext * s )

Definition at line 115 of file mpeg12.c.

Referenced by ff_mpeg1_encode_init(), and mpeg_decode_init().

void ff_mpeg1_clean_buffers ( MpegEncContext * s )

Definition at line 123 of file mpeg12.c.

Referenced by encode_thread(), and mpeg_decode_slice().

av_cold void ff_mpeg12_init_vlcs ( void )

Definition at line 145 of file mpeg12.c.

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

int ff_mpeg1_find_frame_end	(	ParseContext *	pc,
		const uint8_t *	buf,
		int	buf_size,
		AVCodecParserContext *	s
	)

Find the end of the current frame in the bitstream.

Returns: the position of the first byte of the next frame, or -1

Definition at line 186 of file mpeg12.c.

Referenced by mpeg_decode_frame(), and mpegvideo_parse().

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

Definition at line 248 of file mpeg12.c.

Referenced by mpeg_decode_mb(), and tqi_decode_mb().

Variable Documentation

uint8_t ff_mpeg12_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]

Definition at line 45 of file mpeg12.c.

Referenced by ff_mpeg12_init_vlcs(), and ff_mpeg1_encode_init().

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 47 of file mpeg12.c.

Referenced by ff_mpeg12_init_vlcs().

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 }, 
}