+ border = s->resampler->invert_initial_buffer(s->resample, &s->in_buffer,
+ &in, in_count, &s->in_buffer_index, &s->in_buffer_count);
+ if (border == INT_MAX) return 0;
+ else if (border < 0) return border;
+ else if (border) { buf_set(&in, &in, border); in_count -= border; s->resample_in_constraint = 0; }
+