/// maximum supported filter order
#define MAXORDER 30
-av_cold struct FFIIRFilterCoeffs* ff_iir_filter_init_coeffs(enum IIRFilterType filt_type,
+av_cold struct FFIIRFilterCoeffs* ff_iir_filter_init_coeffs(void *avc,
+ enum IIRFilterType filt_type,
enum IIRFilterMode filt_mode,
int order, float cutoff_ratio,
float stopband, float ripple)
if(order <= 1 || (order & 1) || order > MAXORDER || cutoff_ratio >= 1.0)
return NULL;
- c = av_malloc(sizeof(FFIIRFilterCoeffs));
- c->cx = av_malloc(sizeof(c->cx[0]) * ((order >> 1) + 1));
- c->cy = av_malloc(sizeof(c->cy[0]) * order);
+ FF_ALLOCZ_OR_GOTO(avc, c, sizeof(FFIIRFilterCoeffs),
+ init_fail);
+ FF_ALLOC_OR_GOTO (avc, c->cx, sizeof(c->cx[0]) * ((order >> 1) + 1),
+ init_fail);
+ FF_ALLOC_OR_GOTO (avc, c->cy, sizeof(c->cy[0]) * order,
+ init_fail);
c->order = order;
wa = 2 * tan(M_PI * 0.5 * cutoff_ratio);
c->gain /= 1 << order;
return c;
+
+init_fail:
+ ff_iir_filter_free_coeffs(c);
+ return NULL;
}
av_cold struct FFIIRFilterState* ff_iir_filter_init_state(int order)
/**
* Initialize filter coefficients.
*
+ * @param avc a pointer to an arbitrary struct of which the first
+ * field is a pointer to an AVClass struct
* @param filt_type filter type (e.g. Butterworth)
* @param filt_mode filter mode (e.g. lowpass)
* @param order filter order
*
* @return pointer to filter coefficients structure or NULL if filter cannot be created
*/
-struct FFIIRFilterCoeffs* ff_iir_filter_init_coeffs(enum IIRFilterType filt_type,
+struct FFIIRFilterCoeffs* ff_iir_filter_init_coeffs(void *avc,
+ enum IIRFilterType filt_type,
enum IIRFilterMode filt_mode,
int order, float cutoff_ratio,
float stopband, float ripple);
cutoff_coeff = 2.0 * avctx->cutoff / avctx->sample_rate;
if (cutoff_coeff)
- ctx->fcoeffs = ff_iir_filter_init_coeffs(FF_FILTER_TYPE_BUTTERWORTH, FF_FILTER_MODE_LOWPASS,
+ ctx->fcoeffs = ff_iir_filter_init_coeffs(avctx, FF_FILTER_TYPE_BUTTERWORTH, FF_FILTER_MODE_LOWPASS,
FILT_ORDER, cutoff_coeff, 0.0, 0.0);
if (ctx->fcoeffs) {
ctx->fstate = av_mallocz(sizeof(ctx->fstate[0]) * avctx->channels);