X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavfilter%2Faf_acrossover.c;h=03a7ae11197e1993bedd2719f4ea6b7be7a9d77a;hb=2a2082a41bca9dbb22c45288972f2da309443cf8;hp=f8c4d1f25a4ae8da8bacdc645ea0008f7a0d0559;hpb=bc529ea9bc0c6ee9ed8301a62b26e60e686a2db0;p=ffmpeg diff --git a/libavfilter/af_acrossover.c b/libavfilter/af_acrossover.c index f8c4d1f25a4..03a7ae11197 100644 --- a/libavfilter/af_acrossover.c +++ b/libavfilter/af_acrossover.c @@ -27,6 +27,7 @@ #include "libavutil/avstring.h" #include "libavutil/channel_layout.h" #include "libavutil/eval.h" +#include "libavutil/float_dsp.h" #include "libavutil/internal.h" #include "libavutil/opt.h" @@ -38,32 +39,46 @@ #define MAX_SPLITS 16 #define MAX_BANDS MAX_SPLITS + 1 -typedef struct BiquadContext { - double a0, a1, a2; - double b1, b2; - double z1, z2; -} BiquadContext; +#define B0 0 +#define B1 1 +#define B2 2 +#define A1 3 +#define A2 4 -typedef struct CrossoverChannel { - BiquadContext lp[MAX_BANDS][16]; - BiquadContext hp[MAX_BANDS][16]; -} CrossoverChannel; +typedef struct BiquadCoeffs { + double cd[5]; + float cf[5]; +} BiquadCoeffs; typedef struct AudioCrossoverContext { const AVClass *class; char *splits_str; + char *gains_str; int order_opt; + float level_in; int order; int filter_count; + int first_order; + int ap_filter_count; int nb_splits; - float *splits; + float splits[MAX_SPLITS]; - CrossoverChannel *xover; + float gains[MAX_BANDS]; + + BiquadCoeffs lp[MAX_BANDS][20]; + BiquadCoeffs hp[MAX_BANDS][20]; + BiquadCoeffs ap[MAX_BANDS][20]; + + AVFrame *xover; AVFrame *input_frame; AVFrame *frames[MAX_BANDS]; + + int (*filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); + + AVFloatDSPContext *fdsp; } AudioCrossoverContext; #define OFFSET(x) offsetof(AudioCrossoverContext, x) @@ -71,25 +86,67 @@ typedef struct AudioCrossoverContext { static const AVOption acrossover_options[] = { { "split", "set split frequencies", OFFSET(splits_str), AV_OPT_TYPE_STRING, {.str="500"}, 0, 0, AF }, - { "order", "set order", OFFSET(order_opt), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, AF, "m" }, - { "2nd", "2nd order", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "m" }, - { "4th", "4th order", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "m" }, - { "8th", "8th order", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "m" }, - { "12th", "12th order", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "m" }, - { "16th", "16th order", 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, AF, "m" }, + { "order", "set filter order", OFFSET(order_opt), AV_OPT_TYPE_INT, {.i64=1}, 0, 9, AF, "m" }, + { "2nd", "2nd order (12 dB/8ve)", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "m" }, + { "4th", "4th order (24 dB/8ve)", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "m" }, + { "6th", "6th order (36 dB/8ve)", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "m" }, + { "8th", "8th order (48 dB/8ve)", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "m" }, + { "10th", "10th order (60 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, AF, "m" }, + { "12th", "12th order (72 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, AF, "m" }, + { "14th", "14th order (84 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=6}, 0, 0, AF, "m" }, + { "16th", "16th order (96 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=7}, 0, 0, AF, "m" }, + { "18th", "18th order (108 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=8}, 0, 0, AF, "m" }, + { "20th", "20th order (120 dB/8ve)",0, AV_OPT_TYPE_CONST, {.i64=9}, 0, 0, AF, "m" }, + { "level", "set input gain", OFFSET(level_in), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF }, + { "gain", "set output bands gain", OFFSET(gains_str), AV_OPT_TYPE_STRING, {.str="1.f"}, 0, 0, AF }, { NULL } }; AVFILTER_DEFINE_CLASS(acrossover); +static int parse_gains(AVFilterContext *ctx) +{ + AudioCrossoverContext *s = ctx->priv; + char *p, *arg, *saveptr = NULL; + int i, ret = 0; + + saveptr = NULL; + p = s->gains_str; + for (i = 0; i < MAX_BANDS; i++) { + float gain; + char c[3] = { 0 }; + + if (!(arg = av_strtok(p, " |", &saveptr))) + break; + + p = NULL; + + if (av_sscanf(arg, "%f%2s", &gain, c) < 1) { + av_log(ctx, AV_LOG_ERROR, "Invalid syntax for gain[%d].\n", i); + ret = AVERROR(EINVAL); + break; + } + + if (c[0] == 'd' && c[1] == 'B') + s->gains[i] = expf(gain * M_LN10 / 20.f); + else + s->gains[i] = gain; + } + + for (; i < MAX_BANDS; i++) + s->gains[i] = 1.f; + + return ret; +} + static av_cold int init(AVFilterContext *ctx) { AudioCrossoverContext *s = ctx->priv; char *p, *arg, *saveptr = NULL; int i, ret = 0; - s->splits = av_calloc(MAX_SPLITS, sizeof(*s->splits)); - if (!s->splits) + s->fdsp = avpriv_float_dsp_alloc(0); + if (!s->fdsp) return AVERROR(ENOMEM); p = s->splits_str; @@ -120,6 +177,10 @@ static av_cold int init(AVFilterContext *ctx) s->nb_splits = i; + ret = parse_gains(ctx); + if (ret < 0) + return ret; + for (i = 0; i <= s->nb_splits; i++) { AVFilterPad pad = { 0 }; char *name; @@ -139,71 +200,107 @@ static av_cold int init(AVFilterContext *ctx) return ret; } -static void set_lp(BiquadContext *b, double fc, double q, double sr) +static void set_lp(BiquadCoeffs *b, double fc, double q, double sr) { - double thetac = 2.0 * M_PI * fc / sr; - double d = 1.0 / q; - double beta = 0.5 * (1.0 - (d / 2.0) * sin(thetac)) / (1.0 + (d / 2.0) * sin(thetac)); - double gamma = (0.5 + beta) * cos(thetac); - - b->a0 = (0.5 + beta - gamma) / 2.0; - b->a1 = 0.5 + beta - gamma; - b->a2 = b->a1 / 2.0; - b->b1 = 2.0 * gamma; - b->b2 = -2.0 * beta; + double omega = 2. * M_PI * fc / sr; + double cosine = cos(omega); + double alpha = sin(omega) / (2. * q); + + double b0 = (1. - cosine) / 2.; + double b1 = 1. - cosine; + double b2 = (1. - cosine) / 2.; + double a0 = 1. + alpha; + double a1 = -2. * cosine; + double a2 = 1. - alpha; + + b->cd[B0] = b0 / a0; + b->cd[B1] = b1 / a0; + b->cd[B2] = b2 / a0; + b->cd[A1] = -a1 / a0; + b->cd[A2] = -a2 / a0; + + b->cf[B0] = b->cd[B0]; + b->cf[B1] = b->cd[B1]; + b->cf[B2] = b->cd[B2]; + b->cf[A1] = b->cd[A1]; + b->cf[A2] = b->cd[A2]; } -static void set_hp(BiquadContext *b, double fc, double q, double sr) +static void set_hp(BiquadCoeffs *b, double fc, double q, double sr) { - double thetac = 2.0 * M_PI * fc / sr; - double d = 1.0 / q; - double beta = 0.5 * (1.0 - (d / 2.0) * sin(thetac)) / (1.0 + (d / 2.0) * sin(thetac)); - double gamma = (0.5 + beta) * cos(thetac); - - b->a0 = (0.5 + beta + gamma) / 2.0; - b->a1 = -(0.5 + beta + gamma); - b->a2 = b->a0; - b->b1 = 2.0 * gamma; - b->b2 = -2.0 * beta; + double omega = 2. * M_PI * fc / sr; + double cosine = cos(omega); + double alpha = sin(omega) / (2. * q); + + double b0 = (1. + cosine) / 2.; + double b1 = -1. - cosine; + double b2 = (1. + cosine) / 2.; + double a0 = 1. + alpha; + double a1 = -2. * cosine; + double a2 = 1. - alpha; + + b->cd[B0] = b0 / a0; + b->cd[B1] = b1 / a0; + b->cd[B2] = b2 / a0; + b->cd[A1] = -a1 / a0; + b->cd[A2] = -a2 / a0; + + b->cf[B0] = b->cd[B0]; + b->cf[B1] = b->cd[B1]; + b->cf[B2] = b->cd[B2]; + b->cf[A1] = b->cd[A1]; + b->cf[A2] = b->cd[A2]; } -static void calc_q_factors(int order, double *q) +static void set_ap(BiquadCoeffs *b, double fc, double q, double sr) { - int num = 1, den = 4 * order; - - for (int i = 0; i < order; i++) { - q[i] = fabs(1. / (2. * cos(num * M_PI / den))); - num += 2; - } + double omega = 2. * M_PI * fc / sr; + double cosine = cos(omega); + double alpha = sin(omega) / (2. * q); + + double a0 = 1. + alpha; + double a1 = -2. * cosine; + double a2 = 1. - alpha; + double b0 = a2; + double b1 = a1; + double b2 = a0; + + b->cd[B0] = b0 / a0; + b->cd[B1] = b1 / a0; + b->cd[B2] = b2 / a0; + b->cd[A1] = -a1 / a0; + b->cd[A2] = -a2 / a0; + + b->cf[B0] = b->cd[B0]; + b->cf[B1] = b->cd[B1]; + b->cf[B2] = b->cd[B2]; + b->cf[A1] = b->cd[A1]; + b->cf[A2] = b->cd[A2]; } -static int config_input(AVFilterLink *inlink) +static void set_ap1(BiquadCoeffs *b, double fc, double sr) { - AVFilterContext *ctx = inlink->dst; - AudioCrossoverContext *s = ctx->priv; - int sample_rate = inlink->sample_rate; - double q[16] = { 0.5 }; - - s->xover = av_calloc(inlink->channels, sizeof(*s->xover)); - if (!s->xover) - return AVERROR(ENOMEM); - - s->order = FFMAX(2, s->order_opt * 4); - s->filter_count = s->order / 2; - calc_q_factors(s->filter_count / 2, q + (s->order == 2)); - - for (int ch = 0; ch < inlink->channels; ch++) { - for (int band = 0; band <= s->nb_splits; band++) { - for (int n = 0; n < s->filter_count; n++) { - const int idx = (n + (s->order == 2)) / 2; + double omega = 2. * M_PI * fc / sr; + + b->cd[A1] = exp(-omega); + b->cd[A2] = 0.; + b->cd[B0] = -b->cd[A1]; + b->cd[B1] = 1.; + b->cd[B2] = 0.; + + b->cf[B0] = b->cd[B0]; + b->cf[B1] = b->cd[B1]; + b->cf[B2] = b->cd[B2]; + b->cf[A1] = b->cd[A1]; + b->cf[A2] = b->cd[A2]; +} - set_lp(&s->xover[ch].lp[band][n], s->splits[band], q[idx], sample_rate); - set_hp(&s->xover[ch].hp[band][n], s->splits[band], q[idx], sample_rate); - } - } - } +static void calc_q_factors(int order, double *q) +{ + double n = order / 2.; - return 0; + for (int i = 0; i < n / 2; i++) + q[i] = 1. / (-2. * cos(M_PI * (2. * (i + 1) + n - 1.) / (2. * n))); } static int query_formats(AVFilterContext *ctx) @@ -211,7 +308,7 @@ static int query_formats(AVFilterContext *ctx) AVFilterFormats *formats; AVFilterChannelLayouts *layouts; static const enum AVSampleFormat sample_fmts[] = { - AV_SAMPLE_FMT_DBLP, + AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }; int ret; @@ -236,65 +333,176 @@ static int query_formats(AVFilterContext *ctx) return ff_set_common_samplerates(ctx, formats); } -static void biquad_process(BiquadContext *b, - double *dst, const double *src, - int nb_samples) -{ - const double a0 = b->a0; - const double a1 = b->a1; - const double a2 = b->a2; - const double b1 = b->b1; - const double b2 = b->b2; - double z1 = b->z1; - double z2 = b->z2; - - for (int n = 0; n < nb_samples; n++) { - const double in = src[n]; - double out; - - out = in * a0 + z1; - z1 = a1 * in + z2 + b1 * out; - z2 = a2 * in + b2 * out; - dst[n] = out; - } +#define BIQUAD_PROCESS(name, type) \ +static void biquad_process_## name(const type *const c, \ + type *b, \ + type *dst, const type *src, \ + int nb_samples) \ +{ \ + const type b0 = c[B0]; \ + const type b1 = c[B1]; \ + const type b2 = c[B2]; \ + const type a1 = c[A1]; \ + const type a2 = c[A2]; \ + type z1 = b[0]; \ + type z2 = b[1]; \ + \ + for (int n = 0; n + 1 < nb_samples; n++) { \ + type in = src[n]; \ + type out; \ + \ + out = in * b0 + z1; \ + z1 = b1 * in + z2 + a1 * out; \ + z2 = b2 * in + a2 * out; \ + dst[n] = out; \ + \ + n++; \ + in = src[n]; \ + out = in * b0 + z1; \ + z1 = b1 * in + z2 + a1 * out; \ + z2 = b2 * in + a2 * out; \ + dst[n] = out; \ + } \ + \ + if (nb_samples & 1) { \ + const int n = nb_samples - 1; \ + const type in = src[n]; \ + type out; \ + \ + out = in * b0 + z1; \ + z1 = b1 * in + z2 + a1 * out; \ + z2 = b2 * in + a2 * out; \ + dst[n] = out; \ + } \ + \ + b[0] = z1; \ + b[1] = z2; \ +} - b->z1 = z1; - b->z2 = z2; +BIQUAD_PROCESS(fltp, float) +BIQUAD_PROCESS(dblp, double) + +#define XOVER_PROCESS(name, type, one, ff) \ +static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ +{ \ + AudioCrossoverContext *s = ctx->priv; \ + AVFrame *in = s->input_frame; \ + AVFrame **frames = s->frames; \ + const int start = (in->channels * jobnr) / nb_jobs; \ + const int end = (in->channels * (jobnr+1)) / nb_jobs; \ + const int nb_samples = in->nb_samples; \ + const int nb_outs = ctx->nb_outputs; \ + const int first_order = s->first_order; \ + \ + for (int ch = start; ch < end; ch++) { \ + const type *src = (const type *)in->extended_data[ch]; \ + type *xover = (type *)s->xover->extended_data[ch]; \ + \ + s->fdsp->vector_## ff ##mul_scalar((type *)frames[0]->extended_data[ch], src, \ + s->level_in, FFALIGN(nb_samples, sizeof(type))); \ + \ + for (int band = 0; band < nb_outs; band++) { \ + for (int f = 0; band + 1 < nb_outs && f < s->filter_count; f++) { \ + const type *prv = (const type *)frames[band]->extended_data[ch]; \ + type *dst = (type *)frames[band + 1]->extended_data[ch]; \ + const type *hsrc = f == 0 ? prv : dst; \ + type *hp = xover + nb_outs * 20 + band * 20 + f * 2; \ + const type *const hpc = (type *)&s->hp[band][f].c ## ff; \ + \ + biquad_process_## name(hpc, hp, dst, hsrc, nb_samples); \ + } \ + \ + for (int f = 0; band + 1 < nb_outs && f < s->filter_count; f++) { \ + type *dst = (type *)frames[band]->extended_data[ch]; \ + const type *lsrc = dst; \ + type *lp = xover + band * 20 + f * 2; \ + const type *const lpc = (type *)&s->lp[band][f].c ## ff; \ + \ + biquad_process_## name(lpc, lp, dst, lsrc, nb_samples); \ + } \ + \ + for (int aband = band + 1; aband + 1 < nb_outs; aband++) { \ + if (first_order) { \ + const type *asrc = (const type *)frames[band]->extended_data[ch]; \ + type *dst = (type *)frames[band]->extended_data[ch]; \ + type *ap = xover + nb_outs * 40 + (aband * nb_outs + band) * 20; \ + const type *const apc = (type *)&s->ap[aband][0].c ## ff; \ + \ + biquad_process_## name(apc, ap, dst, asrc, nb_samples); \ + } \ + \ + for (int f = first_order; f < s->ap_filter_count; f++) { \ + const type *asrc = (const type *)frames[band]->extended_data[ch]; \ + type *dst = (type *)frames[band]->extended_data[ch]; \ + type *ap = xover + nb_outs * 40 + (aband * nb_outs + band) * 20 + f * 2;\ + const type *const apc = (type *)&s->ap[aband][f].c ## ff; \ + \ + biquad_process_## name(apc, ap, dst, asrc, nb_samples); \ + } \ + } \ + } \ + \ + for (int band = 0; band < nb_outs; band++) { \ + const type gain = s->gains[band] * ((band & 1 && first_order) ? -one : one); \ + type *dst = (type *)frames[band]->extended_data[ch]; \ + \ + s->fdsp->vector_## ff ##mul_scalar(dst, dst, gain, \ + FFALIGN(nb_samples, sizeof(type))); \ + } \ + } \ + \ + return 0; \ } -static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) +XOVER_PROCESS(fltp, float, 1.f, f) +XOVER_PROCESS(dblp, double, 1.0, d) + +static int config_input(AVFilterLink *inlink) { + AVFilterContext *ctx = inlink->dst; AudioCrossoverContext *s = ctx->priv; - AVFrame *in = s->input_frame; - AVFrame **frames = s->frames; - const int start = (in->channels * jobnr) / nb_jobs; - const int end = (in->channels * (jobnr+1)) / nb_jobs; - const int nb_samples = in->nb_samples; - - for (int ch = start; ch < end; ch++) { - CrossoverChannel *xover = &s->xover[ch]; - - for (int band = 0; band < ctx->nb_outputs; band++) { - for (int f = 0; band + 1 < ctx->nb_outputs && f < s->filter_count; f++) { - const double *src = band == 0 ? (const double *)in->extended_data[ch] : (const double *)frames[band]->extended_data[ch]; - double *dst = (double *)frames[band + 1]->extended_data[ch]; - const double *hsrc = f == 0 ? src : dst; - BiquadContext *hp = &xover->hp[band][f]; - - biquad_process(hp, dst, hsrc, nb_samples); - } - - for (int f = 0; band + 1 < ctx->nb_outputs && f < s->filter_count; f++) { - const double *src = band == 0 ? (const double *)in->extended_data[ch] : (const double *)frames[band]->extended_data[ch]; - double *dst = (double *)frames[band]->extended_data[ch]; - const double *lsrc = f == 0 ? src : dst; - BiquadContext *lp = &xover->lp[band][f]; - - biquad_process(lp, dst, lsrc, nb_samples); - } + int sample_rate = inlink->sample_rate; + double q[16]; + + s->order = (s->order_opt + 1) * 2; + s->filter_count = s->order / 2; + s->first_order = s->filter_count & 1; + s->ap_filter_count = s->filter_count / 2 + s->first_order; + calc_q_factors(s->order, q); + + for (int band = 0; band <= s->nb_splits; band++) { + if (s->first_order) { + set_lp(&s->lp[band][0], s->splits[band], 0.5, sample_rate); + set_hp(&s->hp[band][0], s->splits[band], 0.5, sample_rate); } + + for (int n = s->first_order; n < s->filter_count; n++) { + const int idx = s->filter_count / 2 - ((n + s->first_order) / 2 - s->first_order) - 1; + + set_lp(&s->lp[band][n], s->splits[band], q[idx], sample_rate); + set_hp(&s->hp[band][n], s->splits[band], q[idx], sample_rate); + } + + if (s->first_order) + set_ap1(&s->ap[band][0], s->splits[band], sample_rate); + + for (int n = s->first_order; n < s->ap_filter_count; n++) { + const int idx = (s->filter_count / 2 - ((n * 2 + s->first_order) / 2 - s->first_order) - 1); + + set_ap(&s->ap[band][n], s->splits[band], q[idx], sample_rate); + } + } + + switch (inlink->format) { + case AV_SAMPLE_FMT_FLTP: s->filter_channels = filter_channels_fltp; break; + case AV_SAMPLE_FMT_DBLP: s->filter_channels = filter_channels_dblp; break; } + s->xover = ff_get_audio_buffer(inlink, 2 * (ctx->nb_outputs * 10 + ctx->nb_outputs * 10 + + ctx->nb_outputs * ctx->nb_outputs * 10)); + if (!s->xover) + return AVERROR(ENOMEM); + return 0; } @@ -320,8 +528,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in) goto fail; s->input_frame = in; - ctx->internal->execute(ctx, filter_channels, NULL, NULL, FFMIN(inlink->channels, - ff_filter_get_nb_threads(ctx))); + ctx->internal->execute(ctx, s->filter_channels, NULL, NULL, FFMIN(inlink->channels, + ff_filter_get_nb_threads(ctx))); for (i = 0; i < ctx->nb_outputs; i++) { ret = ff_filter_frame(ctx->outputs[i], frames[i]); @@ -344,8 +552,8 @@ static av_cold void uninit(AVFilterContext *ctx) AudioCrossoverContext *s = ctx->priv; int i; - av_freep(&s->splits); - av_freep(&s->xover); + av_freep(&s->fdsp); + av_frame_free(&s->xover); for (i = 0; i < ctx->nb_outputs; i++) av_freep(&ctx->output_pads[i].name);