Revision 0361d13c libavcodec/iirfilter.c
| libavcodec/iirfilter.c | ||
|---|---|---|
| 164 | 164 |
float stopband, float ripple) |
| 165 | 165 |
{
|
| 166 | 166 |
FFIIRFilterCoeffs *c; |
| 167 |
int ret = 0; |
|
| 167 | 168 |
|
| 168 | 169 |
if (order <= 0 || order > MAXORDER || cutoff_ratio >= 1.0) |
| 169 | 170 |
return NULL; |
| ... | ... | |
| 176 | 177 |
init_fail); |
| 177 | 178 |
c->order = order; |
| 178 | 179 |
|
| 179 |
if (filt_type == FF_FILTER_TYPE_BUTTERWORTH) {
|
|
| 180 |
if (butterworth_init_coeffs(avc, c, filt_mode, order, cutoff_ratio, |
|
| 181 |
stopband)) {
|
|
| 182 |
goto init_fail; |
|
| 183 |
} |
|
| 184 |
} else if (filt_type == FF_FILTER_TYPE_BIQUAD) {
|
|
| 185 |
if (biquad_init_coeffs(avc, c, filt_mode, order, cutoff_ratio, |
|
| 186 |
stopband)) {
|
|
| 187 |
goto init_fail; |
|
| 188 |
} |
|
| 189 |
} else {
|
|
| 180 |
switch (filt_type) {
|
|
| 181 |
case FF_FILTER_TYPE_BUTTERWORTH: |
|
| 182 |
ret = butterworth_init_coeffs(avc, c, filt_mode, order, cutoff_ratio, |
|
| 183 |
stopband); |
|
| 184 |
break; |
|
| 185 |
case FF_FILTER_TYPE_BIQUAD: |
|
| 186 |
ret = biquad_init_coeffs(avc, c, filt_mode, order, cutoff_ratio, |
|
| 187 |
stopband); |
|
| 188 |
break; |
|
| 189 |
default: |
|
| 190 | 190 |
av_log(avc, AV_LOG_ERROR, "filter type is not currently implemented\n"); |
| 191 | 191 |
goto init_fail; |
| 192 | 192 |
} |
| 193 | 193 |
|
| 194 |
return c; |
|
| 194 |
if (!ret) |
|
| 195 |
return c; |
|
| 195 | 196 |
|
| 196 | 197 |
init_fail: |
| 197 | 198 |
ff_iir_filter_free_coeffs(c); |
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