libavcodec/mjpegdec.c File Reference

MJPEG decoder. More...

#include <assert.h>
#include "avcodec.h"
#include "dsputil.h"
#include "mjpeg.h"
#include "mjpegdec.h"
#include "jpeglsdec.h"

Go to the source code of this file.

Defines

#define REFINE_BIT(j)
#define ZERO_RUN

Functions

static int build_vlc (VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table, int nb_codes, int use_static, int is_ac)
static void build_basic_mjpeg_vlc (MJpegDecodeContext *s)
av_cold int ff_mjpeg_decode_init (AVCodecContext *avctx)
int ff_mjpeg_decode_dqt (MJpegDecodeContext *s)
int ff_mjpeg_decode_dht (MJpegDecodeContext *s)
int ff_mjpeg_decode_sof (MJpegDecodeContext *s)
static int mjpeg_decode_dc (MJpegDecodeContext *s, int dc_index)
static int decode_block (MJpegDecodeContext *s, DCTELEM *block, int component, int dc_index, int ac_index, int16_t *quant_matrix)
static int decode_dc_progressive (MJpegDecodeContext *s, DCTELEM *block, int component, int dc_index, int16_t *quant_matrix, int Al)
static int decode_block_progressive (MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN)
static int decode_block_refinement (MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN)
static int ljpeg_decode_rgb_scan (MJpegDecodeContext *s, int predictor, int point_transform)
static int ljpeg_decode_yuv_scan (MJpegDecodeContext *s, int predictor, int point_transform)
static int mjpeg_decode_scan (MJpegDecodeContext *s, int nb_components, int Ah, int Al)
static int mjpeg_decode_scan_progressive_ac (MJpegDecodeContext *s, int ss, int se, int Ah, int Al)
int ff_mjpeg_decode_sos (MJpegDecodeContext *s)
static int mjpeg_decode_dri (MJpegDecodeContext *s)
static int mjpeg_decode_app (MJpegDecodeContext *s)
static int mjpeg_decode_com (MJpegDecodeContext *s)
static int find_marker (const uint8_t **pbuf_ptr, const uint8_t *buf_end)
int ff_mjpeg_decode_frame (AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
av_cold int ff_mjpeg_decode_end (AVCodecContext *avctx)

Variables

AVCodec mjpeg_decoder
AVCodec thp_decoder

Detailed Description

MJPEG decoder.

Definition in file mjpegdec.c.

Define Documentation

#define REFINE_BIT ( j   ) 

Value:

{\
    UPDATE_CACHE(re, &s->gb);\
    sign = block[j]>>15;\
    block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
    LAST_SKIP_BITS(re, &s->gb, 1);\
}

Definition at line 523 of file mjpegdec.c.

Referenced by decode_block_refinement().

#define ZERO_RUN

Value:

for(;;i++) {\
    if(i > last) {\
        i += run;\
        if(i > se) {\
            av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
            return -1;\
        }\
        break;\
    }\
    j = s->scantable.permutated[i];\
    if(block[j])\
        REFINE_BIT(j)\
    else if(run-- == 0)\
        break;\
}

Definition at line 530 of file mjpegdec.c.

Referenced by decode_block_refinement().

Function Documentation

static void build_basic_mjpeg_vlc ( MJpegDecodeContext *  s  )  [static]

Definition at line 65 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_init().

static int build_vlc ( VLC *  vlc,
const uint8_t *  bits_table,
const uint8_t *  val_table,
int  nb_codes,
int  use_static,
int  is_ac 
) [static]

Definition at line 43 of file mjpegdec.c.

Referenced by build_basic_mjpeg_vlc(), and ff_mjpeg_decode_dht().

static int decode_block ( MJpegDecodeContext *  s,
DCTELEM *  block,
int  component,
int  dc_index,
int  ac_index,
int16_t *  quant_matrix 
) [static]

Definition at line 387 of file mjpegdec.c.

Referenced by mjpeg_decode_scan().

static int decode_block_progressive ( MJpegDecodeContext *  s,
DCTELEM *  block,
uint8_t *  last_nnz,
int  ac_index,
int16_t *  quant_matrix,
int  ss,
int  se,
int  Al,
int *  EOBRUN 
) [static]

Definition at line 460 of file mjpegdec.c.

Referenced by mjpeg_decode_scan_progressive_ac().

static int decode_block_refinement ( MJpegDecodeContext *  s,
DCTELEM *  block,
uint8_t *  last_nnz,
int  ac_index,
int16_t *  quant_matrix,
int  ss,
int  se,
int  Al,
int *  EOBRUN 
) [static]

Definition at line 548 of file mjpegdec.c.

Referenced by mjpeg_decode_scan_progressive_ac().

static int decode_dc_progressive ( MJpegDecodeContext *  s,
DCTELEM *  block,
int  component,
int  dc_index,
int16_t *  quant_matrix,
int  Al 
) [static]

Definition at line 443 of file mjpegdec.c.

Referenced by mjpeg_decode_scan().

int ff_mjpeg_decode_dht ( MJpegDecodeContext *  s  ) 

Definition at line 148 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), and mjpegb_decode_frame().

int ff_mjpeg_decode_dqt ( MJpegDecodeContext *  s  ) 

Definition at line 113 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame(), and mjpegb_decode_frame().

av_cold int ff_mjpeg_decode_end ( AVCodecContext *  avctx  ) 

Definition at line 1498 of file mjpegdec.c.

int ff_mjpeg_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
const uint8_t *  buf,
int  buf_size 
)

Definition at line 1263 of file mjpegdec.c.

Referenced by sp5x_decode_frame().

av_cold int ff_mjpeg_decode_init ( AVCodecContext *  avctx  ) 

Definition at line 76 of file mjpegdec.c.

int ff_mjpeg_decode_sof ( MJpegDecodeContext *  s  ) 

Definition at line 194 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame(), and mjpegb_decode_frame().

int ff_mjpeg_decode_sos ( MJpegDecodeContext *  s  ) 

Definition at line 889 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame(), and mjpegb_decode_frame().

static int find_marker ( const uint8_t **  pbuf_ptr,
const uint8_t *  buf_end 
) [static]

Definition at line 1233 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame().

static int ljpeg_decode_rgb_scan ( MJpegDecodeContext *  s,
int  predictor,
int  point_transform 
) [static]

Definition at line 613 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_sos().

static int ljpeg_decode_yuv_scan ( MJpegDecodeContext *  s,
int  predictor,
int  point_transform 
) [static]

Definition at line 681 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_sos().

static int mjpeg_decode_app ( MJpegDecodeContext *  s  )  [static]

Definition at line 1026 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame().

static int mjpeg_decode_com ( MJpegDecodeContext *  s  )  [static]

Definition at line 1173 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame().

static int mjpeg_decode_dc ( MJpegDecodeContext *  s,
int  dc_index 
) [inline, static]

Definition at line 369 of file mjpegdec.c.

Referenced by decode_block(), decode_dc_progressive(), ljpeg_decode_rgb_scan(), and ljpeg_decode_yuv_scan().

static int mjpeg_decode_dri ( MJpegDecodeContext *  s  )  [static]

Definition at line 1015 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_frame().

static int mjpeg_decode_scan ( MJpegDecodeContext *  s,
int  nb_components,
int  Ah,
int  Al 
) [static]

Definition at line 764 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_sos(), and sp5x_decode_frame().

static int mjpeg_decode_scan_progressive_ac ( MJpegDecodeContext *  s,
int  ss,
int  se,
int  Ah,
int  Al 
) [static]

Definition at line 846 of file mjpegdec.c.

Referenced by ff_mjpeg_decode_sos().

Variable Documentation

AVCodec mjpeg_decoder

Initial value:

 {
    "mjpeg",
    CODEC_TYPE_VIDEO,
    CODEC_ID_MJPEG,
    sizeof(MJpegDecodeContext),
    ff_mjpeg_decode_init,
    NULL,
    ff_mjpeg_decode_end,
    ff_mjpeg_decode_frame,
    CODEC_CAP_DR1,
    NULL,
    .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
}

Definition at line 1517 of file mjpegdec.c.

AVCodec thp_decoder

Initial value:

 {
    "thp",
    CODEC_TYPE_VIDEO,
    CODEC_ID_THP,
    sizeof(MJpegDecodeContext),
    ff_mjpeg_decode_init,
    NULL,
    ff_mjpeg_decode_end,
    ff_mjpeg_decode_frame,
    CODEC_CAP_DR1,
    NULL,
    .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
}

Definition at line 1531 of file mjpegdec.c.

Generated on Fri Oct 26 02:35:43 2012 for FFmpeg by  doxygen 1.5.8