FFmpeg
Macros | Functions | Variables
mpeg12.c File Reference
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "mpeg12.h"
#include "mpeg12codecs.h"
#include "mpeg12data.h"
#include "mpeg12dec.h"
#include "rl.h"
#include "startcode.h"

Go to the source code of this file.

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)
 
void ff_mpeg1_clean_buffers (MpegEncContext *s)
 
static av_cold void mpeg12_init_vlcs (void)
 
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, 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]
 
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
 
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 236 of file mpeg12.c.

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 67 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and speedhq_static_init().

◆ ff_mpeg1_clean_buffers()

void ff_mpeg1_clean_buffers ( MpegEncContext s)

Definition at line 106 of file mpeg12.c.

Referenced by encode_thread(), and mpeg_decode_slice().

◆ mpeg12_init_vlcs()

static av_cold void mpeg12_init_vlcs ( void  )
static

Definition at line 131 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 164 of file mpeg12.c.

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

◆ ff_mpeg1_find_frame_end()

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 175 of file mpeg12.c.

Referenced by mpeg_decode_frame(), and mpegvideo_parse().

◆ 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 238 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 43 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 53 of file mpeg12.c.

Referenced by mpeg12_init_vlcs().

◆ ff_mv_vlc

VLC ff_mv_vlc

Definition at line 118 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and mpeg_decode_motion().

◆ ff_dc_lum_vlc

VLC ff_dc_lum_vlc

Definition at line 120 of file mpeg12.c.

Referenced by decode_dc(), and mpeg12_init_vlcs().

◆ ff_dc_chroma_vlc

VLC ff_dc_chroma_vlc

Definition at line 121 of file mpeg12.c.

Referenced by decode_dc(), and mpeg12_init_vlcs().

◆ ff_mbincr_vlc

VLC ff_mbincr_vlc

Definition at line 123 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and mpeg_decode_slice().

◆ ff_mb_ptype_vlc

VLC ff_mb_ptype_vlc

Definition at line 124 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and mpeg_decode_mb().

◆ ff_mb_btype_vlc

VLC ff_mb_btype_vlc

Definition at line 125 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and mpeg_decode_mb().

◆ ff_mb_pat_vlc

VLC ff_mb_pat_vlc

Definition at line 126 of file mpeg12.c.

Referenced by mpeg12_init_vlcs(), and mpeg_decode_mb().

◆ ff_mpeg1_rl_vlc

RL_VLC_ELEM ff_mpeg1_rl_vlc[680]

◆ ff_mpeg2_rl_vlc

RL_VLC_ELEM ff_mpeg2_rl_vlc[674]