/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "libavutil/opt.h" #include "avfilter.h" #include "audio.h" #include "formats.h" typedef struct AudioDynamicEqualizerContext { const AVClass *class; double threshold; double dfrequency; double dqfactor; double tfrequency; double tqfactor; double ratio; double range; double makeup; double attack; double release; double attack_coef; double release_coef; int mode; int direction; int detection; int tftype; int dftype; int precision; int format; int (*filter_prepare)(AVFilterContext *ctx); int (*filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); double da_double[3], dm_double[3]; float da_float[3], dm_float[3]; AVFrame *state; } AudioDynamicEqualizerContext; static int query_formats(AVFilterContext *ctx) { AudioDynamicEqualizerContext *s = ctx->priv; static const enum AVSampleFormat sample_fmts[3][3] = { { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }, { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }, { AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }, }; int ret; if ((ret = ff_set_common_all_channel_counts(ctx)) < 0) return ret; if ((ret = ff_set_common_formats_from_list(ctx, sample_fmts[s->precision])) < 0) return ret; return ff_set_common_all_samplerates(ctx); } static double get_coef(double x, double sr) { return exp(-1000. / (x * sr)); } typedef struct ThreadData { AVFrame *in, *out; } ThreadData; #define DEPTH 32 #include "adynamicequalizer_template.c" #undef DEPTH #define DEPTH 64 #include "adynamicequalizer_template.c" static int config_input(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; AudioDynamicEqualizerContext *s = ctx->priv; s->format = inlink->format; s->state = ff_get_audio_buffer(inlink, 8); if (!s->state) return AVERROR(ENOMEM); switch (s->format) { case AV_SAMPLE_FMT_DBLP: for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { double *state = (double *)s->state->extended_data[ch]; state[4] = 1.; } s->filter_prepare = filter_prepare_double; s->filter_channels = filter_channels_double; break; case AV_SAMPLE_FMT_FLTP: for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { float *state = (float *)s->state->extended_data[ch]; state[4] = 1.; } s->filter_prepare = filter_prepare_float; s->filter_channels = filter_channels_float; break; } return 0; } static int filter_frame(AVFilterLink *inlink, AVFrame *in) { AVFilterContext *ctx = inlink->dst; AVFilterLink *outlink = ctx->outputs[0]; AudioDynamicEqualizerContext *s = ctx->priv; ThreadData td; AVFrame *out; if (av_frame_is_writable(in)) { out = in; } else { out = ff_get_audio_buffer(outlink, in->nb_samples); if (!out) { av_frame_free(&in); return AVERROR(ENOMEM); } av_frame_copy_props(out, in); } td.in = in; td.out = out; s->filter_prepare(ctx); ff_filter_execute(ctx, s->filter_channels, &td, NULL, FFMIN(outlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx))); if (out != in) av_frame_free(&in); return ff_filter_frame(outlink, out); } static av_cold void uninit(AVFilterContext *ctx) { AudioDynamicEqualizerContext *s = ctx->priv; av_frame_free(&s->state); } #define OFFSET(x) offsetof(AudioDynamicEqualizerContext, x) #define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM static const AVOption adynamicequalizer_options[] = { { "threshold", "set detection threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 100, FLAGS }, { "dfrequency", "set detection frequency", OFFSET(dfrequency), AV_OPT_TYPE_DOUBLE, {.dbl=1000}, 2, 1000000, FLAGS }, { "dqfactor", "set detection Q factor", OFFSET(dqfactor), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.001, 1000, FLAGS }, { "tfrequency", "set target frequency", OFFSET(tfrequency), AV_OPT_TYPE_DOUBLE, {.dbl=1000}, 2, 1000000, FLAGS }, { "tqfactor", "set target Q factor", OFFSET(tqfactor), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.001, 1000, FLAGS }, { "attack", "set attack duration", OFFSET(attack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 1, 2000, FLAGS }, { "release", "set release duration", OFFSET(release), AV_OPT_TYPE_DOUBLE, {.dbl=200}, 1, 2000, FLAGS }, { "ratio", "set ratio factor", OFFSET(ratio), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 30, FLAGS }, { "makeup", "set makeup gain", OFFSET(makeup), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 100, FLAGS }, { "range", "set max gain", OFFSET(range), AV_OPT_TYPE_DOUBLE, {.dbl=50}, 1, 200, FLAGS }, { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, -1, 1, FLAGS, "mode" }, { "listen", 0, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, "mode" }, { "cut", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" }, { "boost", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" }, { "dftype", "set detection filter type",OFFSET(dftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, "dftype" }, { "bandpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "dftype" }, { "lowpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "dftype" }, { "highpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "dftype" }, { "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "dftype" }, { "tftype", "set target filter type", OFFSET(tftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, "tftype" }, { "bell", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "tftype" }, { "lowshelf", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "tftype" }, { "highshelf",0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "tftype" }, { "direction", "set direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "direction" }, { "downward", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "direction" }, { "upward", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "direction" }, { "auto", "set auto threshold", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=-1}, -1, 1, FLAGS, "auto" }, { "disabled", 0, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, "auto" }, { "off", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "auto" }, { "on", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "auto" }, { "precision", "set processing precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, AF, "precision" }, { "auto", "set auto processing precision", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" }, { "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" }, { "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" }, { NULL } }; AVFILTER_DEFINE_CLASS(adynamicequalizer); static const AVFilterPad inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_AUDIO, .filter_frame = filter_frame, .config_props = config_input, }, }; static const AVFilterPad outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_AUDIO, }, }; const AVFilter ff_af_adynamicequalizer = { .name = "adynamicequalizer", .description = NULL_IF_CONFIG_SMALL("Apply Dynamic Equalization of input audio."), .priv_size = sizeof(AudioDynamicEqualizerContext), .priv_class = &adynamicequalizer_class, .uninit = uninit, FILTER_INPUTS(inputs), FILTER_OUTPUTS(outputs), FILTER_QUERY_FUNC(query_formats), .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, .process_command = ff_filter_process_command, };