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Improvements from Matjaz Thaler

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This commit is contained in:
Klaus Schmidinger
2001-08-09 11:41:39 +02:00
parent 85a0277910
commit c50dc5e888
47 changed files with 4454 additions and 1727 deletions
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13
ac3dec/dither.c
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@@ -31,7 +31,7 @@
#include "dither.h"
const uint_16 dither_lut[256] =
const uint16_t dither_lut[256] =
{
0x0000, 0xa011, 0xe033, 0x4022, 0x6077, 0xc066, 0x8044, 0x2055,
0xc0ee, 0x60ff, 0x20dd, 0x80cc, 0xa099, 0x0088, 0x40aa, 0xe0bb,
@@ -67,7 +67,7 @@ const uint_16 dither_lut[256] =
0x8bf4, 0x2be5, 0x6bc7, 0xcbd6, 0xeb83, 0x4b92, 0x0bb0, 0xaba1
};
uint_16 lfsr_state = 1;
uint16_t lfsr_state = 1;
//
// see dither_gen (inline-able) in dither.h
@@ -89,18 +89,17 @@ uint_16 lfsr_state = 1;
*
*/
uint_16 dither_gen(void)
uint16_t dither_gen(void)
{
int i;
uint_32 state;
uint32_t state;
//explicitly bring the state into a local var as gcc > 3.0?
//doesn't know how to optimize out the stores
state = lfsr_state;
//Generate eight pseudo random bits
for(i=0;i<8;i++)
{
for(i=0;i<8;i++) {
state <<= 1;
if(state & 0x10000)
@@ -109,7 +108,7 @@ uint_16 dither_gen(void)
lfsr_state = state;
return (((((sint_32)state<<8)>>8) * (sint_32) (0.707106 * 256.0))>>16);
return (((((int32_t)state<<8)>>8) * (int32_t) (0.707106 * 256.0))>>16);
}
#endif