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Diffstat (limited to 'contrib/ffmpeg/libavutil/crc.c')
-rw-r--r--contrib/ffmpeg/libavutil/crc.c111
1 files changed, 0 insertions, 111 deletions
diff --git a/contrib/ffmpeg/libavutil/crc.c b/contrib/ffmpeg/libavutil/crc.c
deleted file mode 100644
index 02fb860b8..000000000
--- a/contrib/ffmpeg/libavutil/crc.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "common.h"
-#include "crc.h"
-
-#if LIBAVUTIL_VERSION_INT < (50<<16)
-AVCRC *av_crcEDB88320;
-AVCRC *av_crc04C11DB7;
-AVCRC *av_crc8005 ;
-AVCRC *av_crc07 ;
-#else
-AVCRC av_crcEDB88320[257];
-AVCRC av_crc04C11DB7[257];
-AVCRC av_crc8005 [257];
-AVCRC av_crc07 [257];
-#endif
-
-/**
- * Inits a crc table.
- * @param ctx must be an array of sizeof(AVCRC)*257 or sizeof(AVCRC)*1024
- * @param cts_size size of ctx in bytes
- * @return <0 on failure
- */
-int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
- int i, j;
- uint32_t c;
-
- if (bits < 8 || bits > 32 || poly >= (1LL<<bits))
- return -1;
- if (ctx_size != sizeof(AVCRC)*257 && ctx_size != sizeof(AVCRC)*1024)
- return -1;
-
- for (i = 0; i < 256; i++) {
- if (le) {
- for (c = i, j = 0; j < 8; j++)
- c = (c>>1)^(poly & (-(c&1)));
- ctx[i] = c;
- } else {
- for (c = i << 24, j = 0; j < 8; j++)
- c = (c<<1) ^ ((poly<<(32-bits)) & (((int32_t)c)>>31) );
- ctx[i] = bswap_32(c);
- }
- }
- ctx[256]=1;
-#ifndef CONFIG_SMALL
- if(ctx_size >= sizeof(AVCRC)*1024)
- for (i = 0; i < 256; i++)
- for(j=0; j<3; j++)
- ctx[256*(j+1) + i]= (ctx[256*j + i]>>8) ^ ctx[ ctx[256*j + i]&0xFF ];
-#endif
-
- return 0;
-}
-
-uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length){
- const uint8_t *end= buffer+length;
-
-#ifndef CONFIG_SMALL
- if(!ctx[256])
- while(buffer<end-3){
- crc ^= le2me_32(*(uint32_t*)buffer); buffer+=4;
- crc = ctx[3*256 + ( crc &0xFF)]
- ^ctx[2*256 + ((crc>>8 )&0xFF)]
- ^ctx[1*256 + ((crc>>16)&0xFF)]
- ^ctx[0*256 + ((crc>>24) )];
- }
-#endif
- while(buffer<end)
- crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8);
-
- return crc;
-}
-
-#ifdef TEST
-#undef printf
-main(){
- uint8_t buf[1999];
- int i;
- int p[4][4]={{1, 32, 0xedb88320L, 0x3D5CDD04},
- {0, 32, 0x04c11db7L, 0xC0F5BAE0},
- {0, 16, 0x8005 , 0x1FBB },
- {0, 8, 0x07 , 0xE3 },};
- AVCRC ctx[1 ? 1024:257];
-
- for(i=0; i<sizeof(buf); i++)
- buf[i]= i+i*i;
-
- for(i=0; i<4; i++){
- av_crc_init(ctx, p[i][0], p[i][1], p[i][2], sizeof(ctx));
- printf("crc %08X =%X\n", p[i][2], av_crc(ctx, 0, buf, sizeof(buf)));
- }
-}
-#endif