virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-08 13:22:53 +02:00
Code Issues Releases Activity

Merge ff_ccitt_unpack_1d and 2d.

Browse Source 
Originally committed as revision 16332 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-12-26 15:05:12 +00:00
parent d68542f019
commit 66909bc4f1
2 changed files with 8 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
libavcodec/faxcompr.c
View File

@ -258,36 +258,9 @@ static int find_group3_syncmarker(GetBitContext *gb, int srcsize)
return -1; return -1;
} }
int ff_ccitt_unpack_1d(AVCodecContext *avctx, int ff_ccitt_unpack(AVCodecContext *avctx,
const uint8_t *src, int srcsize, const uint8_t *src, int srcsize,
uint8_t *dst, int height, int stride) uint8_t *dst, int height, int stride, enum TiffCompr compr)
{
int j;
GetBitContext gb;
int *runs, *last;
runs = av_malloc(avctx->width * sizeof(runs[0]));
last = av_malloc(avctx->width * sizeof(last[0]));
init_get_bits(&gb, src, srcsize*8);
for(j = 0; j < height; j++){
if(find_group3_syncmarker(&gb, srcsize*8) < 0)
break;
if(decode_group3_1d_line(avctx, &gb, avctx->width, runs) < 0){
put_line(dst, stride, avctx->width, last);
}else{
put_line(dst, stride, avctx->width, runs);
FFSWAP(int*, last, runs);
}
dst += stride;
}
av_free(runs);
av_free(last);
return 0;
}
int ff_ccitt_unpack_2d(AVCodecContext *avctx,
const uint8_t *src, int srcsize,
uint8_t *dst, int height, int stride, int g4)
{ {
int j; int j;
GetBitContext gb; GetBitContext gb;
@ -301,7 +274,7 @@ int ff_ccitt_unpack_2d(AVCodecContext *avctx,
ref[2] = 0; ref[2] = 0;
init_get_bits(&gb, src, srcsize*8); init_get_bits(&gb, src, srcsize*8);
for(j = 0; j < height; j++){ for(j = 0; j < height; j++){
if(g4){ if(compr == TIFF_G4){
ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, ref); ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, ref);
if(ret < 0){ if(ret < 0){
av_free(runs); av_free(runs);
@ -311,7 +284,7 @@ int ff_ccitt_unpack_2d(AVCodecContext *avctx,
}else{ }else{
if(find_group3_syncmarker(&gb, srcsize*8) < 0) if(find_group3_syncmarker(&gb, srcsize*8) < 0)
break; break;
if(get_bits1(&gb)) if(compr==TIFF_CCITT_RLE || get_bits1(&gb))
ret = decode_group3_1d_line(avctx, &gb, avctx->width, runs); ret = decode_group3_1d_line(avctx, &gb, avctx->width, runs);
else else
ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, ref); ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, ref);

14
libavcodec/faxcompr.h
View File

@ -28,6 +28,7 @@
#define AVCODEC_FAXCOMPR_H #define AVCODEC_FAXCOMPR_H
#include "avcodec.h" #include "avcodec.h"
#include "tiff.h"
/** /**
* initialize upacker code * initialize upacker code
@ -35,17 +36,10 @@
void ff_ccitt_unpack_init(); void ff_ccitt_unpack_init();
/** /**
* unpack data compressed with CCITT Group 3 1-D method * unpack data compressed with CCITT Group 3 1/2-D or Group 4 method
*/ */
int ff_ccitt_unpack_1d(AVCodecContext *avctx, int ff_ccitt_unpack(AVCodecContext *avctx,
const uint8_t *src, int srcsize, const uint8_t *src, int srcsize,
uint8_t *dst, int height, int stride); uint8_t *dst, int height, int stride, enum TiffCompr compr);
/**
* unpack data compressed with CCITT Group 3 2-D or Group 4 method
*/
int ff_ccitt_unpack_2d(AVCodecContext *avctx,
const uint8_t *src, int srcsize,
uint8_t *dst, int height, int stride, int g4);
#endif /* AVCODEC_FAXCOMPR_H */ #endif /* AVCODEC_FAXCOMPR_H */