Makes spectral filtering less crude.
Showing the changes to libavfilter (1 of 1 file). Show all
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| @@ -66,7 +66,7 @@ typedef struct DeNoiseChannel { · 65 unmodified lines | ||
| 66 | 66 | double *abs_var; |
| 67 | 67 | double *rel_var; |
| 68 | 68 | double *min_abs_var; |
| 69 | − AVComplexFloat *fft_in; | |
| 69 | + float *fft_in; | |
| 70 | 70 | AVComplexFloat *fft_out; |
| 71 | 71 | AVTXContext *fft, *ifft; |
| 72 | 72 | av_tx_fn tx_fn, itx_fn; |
| @@ -606,7 +606,7 @@ static int config_input(AVFilterLink *inlink) · 533 unmodified lines | ||
| 606 | 606 | s->sample_advance = s->sample_rate / 80; |
| 607 | 607 | s->window_length = 3 * s->sample_advance; |
| 608 | 608 | s->fft_length2 = 1 << (32 - ff_clz(s->window_length)); |
| 609 | − s->fft_length = s->fft_length2 * 2; | |
| 609 | + s->fft_length = s->fft_length2; | |
| 610 | 610 | s->buffer_length = s->fft_length * 2; |
| 611 | 611 | s->bin_count = s->fft_length2 + 1; |
| 612 | 612 | |
| @@ -662,7 +662,7 @@ static int config_input(AVFilterLink *inlink) · 49 unmodified lines | ||
| 662 | 662 | |
| 663 | 663 | for (int ch = 0; ch < inlink->channels; ch++) { |
| 664 | 664 | DeNoiseChannel *dnch = &s->dnch[ch]; |
| 665 | − float scale = 0.f; | |
| 665 | + float scale = 1.f; | |
| 666 | 666 | |
| 667 | 667 | switch (s->noise_type) { |
| 668 | 668 | case WHITE_NOISE: |
| @@ -711,12 +711,12 @@ static int config_input(AVFilterLink *inlink) · 42 unmodified lines | ||
| 711 | 711 | dnch->abs_var = av_calloc(s->bin_count, sizeof(*dnch->abs_var)); |
| 712 | 712 | dnch->rel_var = av_calloc(s->bin_count, sizeof(*dnch->rel_var)); |
| 713 | 713 | dnch->min_abs_var = av_calloc(s->bin_count, sizeof(*dnch->min_abs_var)); |
| 714 | − dnch->fft_in = av_calloc(s->fft_length2 + 1, sizeof(*dnch->fft_in)); | |
| 714 | + dnch->fft_in = av_calloc(s->fft_length2, sizeof(*dnch->fft_in)); | |
| 715 | 715 | dnch->fft_out = av_calloc(s->fft_length2 + 1, sizeof(*dnch->fft_out)); |
| 716 | − ret = av_tx_init(&dnch->fft, &dnch->tx_fn, AV_TX_FLOAT_FFT, 0, s->fft_length2, &scale, 0); | |
| 716 | + ret = av_tx_init(&dnch->fft, &dnch->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_length2, &scale, 0); | |
| 717 | 717 | if (ret < 0) |
| 718 | 718 | return ret; |
| 719 | − ret = av_tx_init(&dnch->ifft, &dnch->itx_fn, AV_TX_FLOAT_FFT, 1, s->fft_length2, &scale, 0); | |
| 719 | + ret = av_tx_init(&dnch->ifft, &dnch->itx_fn, AV_TX_FLOAT_RDFT, 1, s->fft_length2, &scale, 0); | |
| 720 | 720 | if (ret < 0) |
| 721 | 721 | return ret; |
| 722 | 722 | dnch->spread_function = av_calloc(s->number_of_bands * s->number_of_bands, |
| @@ -816,7 +816,7 @@ static int config_input(AVFilterLink *inlink) · 93 unmodified lines | ||
| 816 | 816 | if (!s->winframe) |
| 817 | 817 | return AVERROR(ENOMEM); |
| 818 | 818 | |
| 819 | − wscale = sqrt(16.0 / (9.0 * s->fft_length)); | |
| 819 | + wscale = sqrt(8.0 / (9.0 * s->fft_length)); | |
| 820 | 820 | sum = 0.0; |
| 821 | 821 | for (int i = 0; i < s->window_length; i++) { |
| 822 | 822 | double d10 = sin(i * M_PI / s->window_length); |
| @@ -863,15 +863,11 @@ static void sample_noise_block(AudioFFTDeNoiseContext *s, · 40 unmodified lines | ||
| 863 | 863 | double mag2, var = 0.0, avr = 0.0, avi = 0.0; |
| 864 | 864 | int edge, j, k, n, edgemax; |
| 865 | 865 | |
| 866 | − for (int i = 0; i < s->window_length; i++) { | |
| 867 | − dnch->fft_in[i].re = s->window[i] * src[i] * (1LL << 23); | |
| 868 | − dnch->fft_in[i].im = 0.0; | |
| 869 | − } | |
| 866 | + for (int i = 0; i < s->window_length; i++) | |
| 867 | + dnch->fft_in[i] = s->window[i] * src[i] * (1LL << 23); | |
| 870 | 868 | |
| 871 | − for (int i = s->window_length; i < s->fft_length2; i++) { | |
| 872 | − dnch->fft_in[i].re = 0.0; | |
| 873 | − dnch->fft_in[i].im = 0.0; | |
| 874 | − } | |
| 869 | + for (int i = s->window_length; i < s->fft_length2; i++) | |
| 870 | + dnch->fft_in[i] = 0.0; | |
| 875 | 871 | |
| 876 | 872 | dnch->tx_fn(dnch->fft, dnch->fft_out, dnch->fft_in, sizeof(float)); |
| 877 | 873 | |
| @@ -1013,15 +1009,11 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_job · 135 unmodified lines | ||
| 1013 | 1009 | dnch->sfm_threshold += dnch->sfm_alpha * (0.5 + (1.0 / 640) * dnch->sfm_fail_total); |
| 1014 | 1010 | } |
| 1015 | 1011 | |
| 1016 | − for (int m = 0; m < s->window_length; m++) { | |
| 1017 | − dnch->fft_in[m].re = s->window[m] * src[m] * (1LL << 23); | |
| 1018 | − dnch->fft_in[m].im = 0; | |
| 1019 | − } | |
| 1012 | + for (int m = 0; m < s->window_length; m++) | |
| 1013 | + dnch->fft_in[m] = s->window[m] * src[m] * (1LL << 23); | |
| 1020 | 1014 | |
| 1021 | − for (int m = s->window_length; m < s->fft_length2; m++) { | |
| 1022 | − dnch->fft_in[m].re = 0; | |
| 1023 | − dnch->fft_in[m].im = 0; | |
| 1024 | − } | |
| 1015 | + for (int m = s->window_length; m < s->fft_length2; m++) | |
| 1016 | + dnch->fft_in[m] = 0; | |
| 1025 | 1017 | |
| 1026 | 1018 | dnch->tx_fn(dnch->fft, dnch->fft_out, dnch->fft_in, sizeof(float)); |
| 1027 | 1019 | |
| @@ -1033,7 +1025,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_job · 5 unmodified lines | ||
| 1033 | 1025 | dnch->itx_fn(dnch->ifft, dnch->fft_in, dnch->fft_out, sizeof(float)); |
| 1034 | 1026 | |
| 1035 | 1027 | for (int m = 0; m < s->window_length; m++) |
| 1036 | − dst[m] += s->window[m] * dnch->fft_in[m].re / (1LL << 23); | |
| 1028 | + dst[m] += s->window[m] * dnch->fft_in[m] / (1LL << 23); | |
| 1037 | 1029 | } |
| 1038 | 1030 | |
| 1039 | 1031 | return 0; |