requirements.
Now calculates crc byte at a time until aligned, then continues with uint32
optimized calculation.
This fixes crashes during mlp decoding on sparc (at least, maybe others).
Originally committed as revision 19160 to svn://svn.ffmpeg.org/ffmpeg/trunk
const uint8_t *end= buffer+length;
#if !CONFIG_SMALL
- if(!ctx[256])
+ if(!ctx[256]) {
+ while(((intptr_t) buffer & 3) && buffer < end)
+ crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8);
+
while(buffer<end-3){
crc ^= le2me_32(*(const uint32_t*)buffer); buffer+=4;
crc = ctx[3*256 + ( crc &0xFF)]
^ctx[1*256 + ((crc>>16)&0xFF)]
^ctx[0*256 + ((crc>>24) )];
}
+ }
#endif
while(buffer<end)
crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8);