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Diffstat (limited to 'src/libffmpeg/libavutil/adler32.c')
-rw-r--r--src/libffmpeg/libavutil/adler32.c71
1 files changed, 0 insertions, 71 deletions
diff --git a/src/libffmpeg/libavutil/adler32.c b/src/libffmpeg/libavutil/adler32.c
deleted file mode 100644
index 50d57470b..000000000
--- a/src/libffmpeg/libavutil/adler32.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/* adler32.c -- compute the Adler-32 checksum of a data stream
- * This is a modified version based on adler32.c from the zlib library.
- *
- * Copyright (C) 1995 Mark Adler
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event will the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- *
- * 1. The origin of this software must not be misrepresented; you must not
- * claim that you wrote the original software. If you use this software
- * in a product, an acknowledgment in the product documentation would be
- * appreciated but is not required.
- * 2. Altered source versions must be plainly marked as such, and must not be
- * misrepresented as being the original software.
- * 3. This notice may not be removed or altered from any source distribution.
- *
- */
-
-#include "common.h"
-#include "adler32.h"
-
-#define BASE 65521L /* largest prime smaller than 65536 */
-
-#define DO1(buf) {s1 += *buf++; s2 += s1;}
-#define DO4(buf) DO1(buf); DO1(buf); DO1(buf); DO1(buf);
-#define DO16(buf) DO4(buf); DO4(buf); DO4(buf); DO4(buf);
-
-unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
-{
- unsigned long s1 = adler & 0xffff;
- unsigned long s2 = adler >> 16;
-
- while (len>0) {
-#ifdef CONFIG_SMALL
- while(len>4 && s2 < (1U<<31)){
- DO4(buf); len-=4;
-#else
- while(len>16 && s2 < (1U<<31)){
- DO16(buf); len-=16;
-#endif
- }
- DO1(buf); len--;
- s1 %= BASE;
- s2 %= BASE;
- }
- return (s2 << 16) | s1;
-}
-
-#ifdef TEST
-#include "log.h"
-#define LEN 7001
-volatile int checksum;
-int main(){
- int i;
- char data[LEN];
- av_log_level = AV_LOG_DEBUG;
- for(i=0; i<LEN; i++)
- data[i]= ((i*i)>>3) + 123*i;
- for(i=0; i<1000; i++){
- START_TIMER
- checksum= av_adler32_update(1, data, LEN);
- STOP_TIMER("adler")
- }
- av_log(NULL, AV_LOG_DEBUG, "%X == 50E6E508\n", checksum);
-}
-#endif