AVFilterLink *outlink = inlink->dst->outputs[0];
int16_t *taps, *endin, *in, *out;
AVFrame *outsamples = ff_get_audio_buffer(inlink, insamples->nb_samples);
+ int len;
if (!outsamples) {
av_frame_free(&insamples);
out = (int16_t *)outsamples->data[0];
in = (int16_t *)insamples ->data[0];
+ len = FFMIN(NUMTAPS, 2*insamples->nb_samples);
// copy part of new input and process with saved input
- memcpy(taps+NUMTAPS, in, NUMTAPS * sizeof(*taps));
- out = scalarproduct(taps, taps + NUMTAPS, out);
+ memcpy(taps+NUMTAPS, in, len * sizeof(*taps));
+ out = scalarproduct(taps, taps + len, out);
// process current input
- endin = in + insamples->nb_samples * 2 - NUMTAPS;
- scalarproduct(in, endin, out);
-
- // save part of input for next round
- memcpy(taps, endin, NUMTAPS * sizeof(*taps));
+ if (2*insamples->nb_samples >= NUMTAPS ){
+ endin = in + insamples->nb_samples * 2 - NUMTAPS;
+ scalarproduct(in, endin, out);
+
+ // save part of input for next round
+ memcpy(taps, endin, NUMTAPS * sizeof(*taps));
+ } else
+ memmove(taps, taps + 2*insamples->nb_samples, NUMTAPS * sizeof(*taps));
av_frame_free(&insamples);
return ff_filter_frame(outlink, outsamples);