static int swri_resample(ResampleContext *c, uint8_t *dst, const uint8_t *src, int *consumed, int src_size, int dst_size, int update_ctx) { int fn_idx = c->format - AV_SAMPLE_FMT_S16P; if (c->filter_length == 1 && c->phase_shift == 0) { int index= c->index; int frac= c->frac; int64_t index2= (1LL<<32)*c->frac/c->src_incr + (1LL<<32)*index; int64_t incr= (1LL<<32) * c->dst_incr / c->src_incr; int new_size = (src_size * (int64_t)c->src_incr - frac + c->dst_incr - 1) / c->dst_incr; dst_size= FFMIN(dst_size, new_size); c->dsp.resample_one[fn_idx](dst, src, dst_size, index2, incr); index += dst_size * c->dst_incr_div; index += (frac + dst_size * (int64_t)c->dst_incr_mod) / c->src_incr; av_assert2(index >= 0); *consumed= index; if (update_ctx) { c->frac = (frac + dst_size * (int64_t)c->dst_incr_mod) % c->src_incr; c->index = 0; } } else { int64_t end_index = (1LL + src_size - c->filter_length) << c->phase_shift; int64_t delta_frac = (end_index - c->index) * c->src_incr - c->frac; int delta_n = (delta_frac + c->dst_incr - 1) / c->dst_incr; dst_size = FFMIN(dst_size, delta_n); if (dst_size > 0) { if (!c->linear) { *consumed = c->dsp.resample_common[fn_idx](c, dst, src, dst_size, update_ctx); } else { *consumed = c->dsp.resample_linear[fn_idx](c, dst, src, dst_size, update_ctx); } } else { *consumed = 0; } } return dst_size; }