If the rate factor is too close to 1, resampling isn't possible. Detect this and bypass the rate effect. This only happens if the output rate is within about 50 ppb of the input, so it is unlikely to occur in normal use.
Unified · Split
| @@ -337,6 +337,10 @@ static void rate_init( · 336 unmodified lines | ||
| 337 | 337 | } |
| 338 | 338 | |
| 339 | 339 | p->num_stages = shift + have_pre_stage + have_arb_stage + have_post_stage; |
| 340 | + | |
| 341 | + if (!p->num_stages) | |
| 342 | + return; | |
| 343 | + | |
| 340 | 344 | p->stages = calloc(p->num_stages + 1, sizeof(*p->stages)); |
| 341 | 345 | for (i = 0; i < p->num_stages; ++i) |
| 342 | 346 | p->stages[i].shared = shared; |
| @@ -496,9 +500,14 @@ static void rate_flush(rate_t * p) · 153 unmodified lines | ||
| 496 | 500 | |
| 497 | 501 | static void rate_close(rate_t * p) |
| 498 | 502 | { |
| 499 | − rate_shared_t * shared = p->stages[0].shared; | |
| 503 | + rate_shared_t *shared; | |
| 500 | 504 | int i; |
| 501 | 505 | |
| 506 | + if (!p->num_stages) | |
| 507 | + return; | |
| 508 | + | |
| 509 | + shared = p->stages[0].shared; | |
| 510 | + | |
| 502 | 511 | for (i = 0; i <= p->num_stages; ++i) |
| 503 | 512 | fifo_delete(&p->stages[i].fifo); |
| 504 | 513 | free(shared->dft_filter[0].coefs); |
| @@ -632,6 +641,12 @@ static int start(sox_effect_t * effp) · 127 unmodified lines | ||
| 632 | 641 | rate_init(&p->rate, p->shared_ptr, effp->in_signal.rate/out_rate,p->bit_depth, |
| 633 | 642 | p->phase, p->bw_0dB_pc, p->anti_aliasing_pc, p->rolloff, !p->given_0dB_pt, |
| 634 | 643 | p->use_hi_prec_clock, p->coef_interp, p->max_coefs_size, p->noIOpt); |
| 644 | + | |
| 645 | + if (!p->rate.num_stages) { | |
| 646 | + lsx_warn("input and output rates too close, skipping resampling"); | |
| 647 | + return SOX_EFF_NULL; | |
| 648 | + } | |
| 649 | + | |
| 635 | 650 | return SOX_SUCCESS; |
| 636 | 651 | } |
| 637 | 652 | |