Revision 5d2f52b9 libavcodec/flacenc.c
| libavcodec/flacenc.c | ||
|---|---|---|
| 649 | 649 |
int32_t *lpc_out, int *shift) |
| 650 | 650 |
{
|
| 651 | 651 |
int i; |
| 652 |
double d, cmax;
|
|
| 652 |
double cmax; |
|
| 653 | 653 |
int32_t qmax; |
| 654 | 654 |
int sh; |
| 655 | 655 |
|
| ... | ... | |
| 659 | 659 |
/* find maximum coefficient value */ |
| 660 | 660 |
cmax = 0.0; |
| 661 | 661 |
for(i=0; i<order; i++) {
|
| 662 |
d = lpc_in[i]; |
|
| 663 |
if(d < 0) d = -d; |
|
| 664 |
if(d > cmax) |
|
| 665 |
cmax = d; |
|
| 662 |
cmax= FFMAX(cmax, fabs(lpc_in[i])); |
|
| 666 | 663 |
} |
| 667 | 664 |
|
| 668 | 665 |
/* if maximum value quantizes to zero, return all zeros */ |
| 669 | 666 |
if(cmax * (1 << MAX_LPC_SHIFT) < 1.0) {
|
| 670 | 667 |
*shift = 0; |
| 671 |
for(i=0; i<order; i++) {
|
|
| 672 |
lpc_out[i] = 0; |
|
| 673 |
} |
|
| 668 |
memset(lpc_out, 0, sizeof(int32_t) * order); |
|
| 674 | 669 |
return; |
| 675 | 670 |
} |
| 676 | 671 |
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