From a08d38ee82e86bf17090eb65050b823366dde718 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 8 Jul 2006 20:23:19 +0000
Subject: [PATCH] put the code which is specific for the large crc table under
#ifndef CONFIG_SMALL
Originally committed as revision 5676 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavutil/crc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavutil/crc.c b/libavutil/crc.c
index 430d8f594dc..13be2020d32 100644
--- a/libavutil/crc.c
+++ b/libavutil/crc.c
@@ -33,10 +33,12 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
}
}
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;
}
@@ -44,6 +46,7 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
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;
@@ -52,6 +55,7 @@ uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t le
^ctx[1*256 + ((crc>>16)&0xFF)]
^ctx[0*256 + ((crc>>24) )];
}
+#endif
while(buffer<end)
crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8);
--
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