+void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
+{
+ void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
+ AVFilterPad *dst = link->dstpad;
+
+ if (!(filter_samples = dst->filter_samples))
+ filter_samples = avfilter_default_filter_samples;
+
+ /* prepare to copy the samples if the buffer has insufficient permissions */
+ if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
+ dst->rej_perms & samplesref->perms) {
+
+ av_log(link->dst, AV_LOG_DEBUG,
+ "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
+ samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
+
+ link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
+ samplesref->format,
+ samplesref->audio->size,
+ samplesref->audio->channel_layout,
+ samplesref->audio->planar);
+ link->cur_buf->pts = samplesref->pts;
+ link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
+
+ /* Copy actual data into new samples buffer */
+ memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
+
+ avfilter_unref_buffer(samplesref);
+ } else
+ link->cur_buf = samplesref;
+
+ filter_samples(link, link->cur_buf);
+}
+