Showing the changes to libavfilter/avfiltergraph.c (1 of 1 file). Show all
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| @@ -461,6 +461,74 @@ static void swap_channel_layouts(AVFilterGraph *graph) · 460 unmodified lines | ||
| 461 | 461 | swap_channel_layouts_on_filter(graph->filters[i]); |
| 462 | 462 | } |
| 463 | 463 | |
| 464 | +static void swap_sample_fmts_on_filter(AVFilterContext *filter) | |
| 465 | +{ | |
| 466 | + AVFilterLink *link = NULL; | |
| 467 | + int format, bps; | |
| 468 | + int i, j; | |
| 469 | + | |
| 470 | + for (i = 0; i < filter->input_count; i++) { | |
| 471 | + link = filter->inputs[i]; | |
| 472 | + | |
| 473 | + if (link->type == AVMEDIA_TYPE_AUDIO && | |
| 474 | + link->out_formats->format_count == 1) | |
| 475 | + break; | |
| 476 | + } | |
| 477 | + if (i == filter->input_count) | |
| 478 | + return; | |
| 479 | + | |
| 480 | + format = link->out_formats->formats[0]; | |
| 481 | + bps = av_get_bytes_per_sample(format); | |
| 482 | + | |
| 483 | + for (i = 0; i < filter->output_count; i++) { | |
| 484 | + AVFilterLink *outlink = filter->outputs[i]; | |
| 485 | + int best_idx, best_score = INT_MIN; | |
| 486 | + | |
| 487 | + if (outlink->type != AVMEDIA_TYPE_AUDIO || | |
| 488 | + outlink->in_formats->format_count < 2) | |
| 489 | + continue; | |
| 490 | + | |
| 491 | + for (j = 0; j < outlink->in_formats->format_count; j++) { | |
| 492 | + int out_format = outlink->in_formats->formats[j]; | |
| 493 | + int out_bps = av_get_bytes_per_sample(out_format); | |
| 494 | + int score; | |
| 495 | + | |
| 496 | + if (av_get_packed_sample_fmt(out_format) == format || | |
| 497 | + av_get_planar_sample_fmt(out_format) == format) { | |
| 498 | + best_idx = j; | |
| 499 | + break; | |
| 500 | + } | |
| 501 | + | |
| 502 | + /* for s32 and float prefer double to prevent loss of information */ | |
| 503 | + if (bps == 4 && out_bps == 8) { | |
| 504 | + best_idx = j; | |
| 505 | + break; | |
| 506 | + } | |
| 507 | + | |
| 508 | + /* prefer closest higher or equal bps */ | |
| 509 | + score = -abs(out_bps - bps); | |
| 510 | + if (out_bps >= bps) | |
| 511 | + score += INT_MAX/2; | |
| 512 | + | |
| 513 | + if (score > best_score) { | |
| 514 | + best_score = score; | |
| 515 | + best_idx = j; | |
| 516 | + } | |
| 517 | + } | |
| 518 | + FFSWAP(int, outlink->in_formats->formats[0], | |
| 519 | + outlink->in_formats->formats[best_idx]); | |
| 520 | + } | |
| 521 | +} | |
| 522 | + | |
| 523 | +static void swap_sample_fmts(AVFilterGraph *graph) | |
| 524 | +{ | |
| 525 | + int i; | |
| 526 | + | |
| 527 | + for (i = 0; i < graph->filter_count; i++) | |
| 528 | + swap_sample_fmts_on_filter(graph->filters[i]); | |
| 529 | + | |
| 530 | +} | |
| 531 | + | |
| 464 | 532 | static int pick_formats(AVFilterGraph *graph) |
| 465 | 533 | { |
| 466 | 534 | int i, j, ret; |
| @@ -491,8 +559,9 @@ int ff_avfilter_graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) · 24 unmodified lines | ||
| 491 | 559 | * of format conversion inside filters */ |
| 492 | 560 | reduce_formats(graph); |
| 493 | 561 | |
| 494 | − /* for audio filters, ensure the best sample rate and channel layout | |
| 562 | + /* for audio filters, ensure the best format, sample rate and channel layout | |
| 495 | 563 | * is selected */ |
| 564 | + swap_sample_fmts(graph); | |
| 496 | 565 | swap_samplerates(graph); |
| 497 | 566 | swap_channel_layouts(graph); |
| 498 | 567 | |