| /* |
| * 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 <float.h> |
| |
| #include "libavutil/ffmath.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "audio.h" |
| #include "formats.h" |
| |
| enum DetectionModes { |
| DET_UNSET = 0, |
| DET_DISABLED, |
| DET_OFF, |
| DET_ON, |
| DET_ADAPTIVE, |
| NB_DMODES, |
| }; |
| |
| enum FilterModes { |
| LISTEN = -1, |
| CUT_BELOW, |
| CUT_ABOVE, |
| BOOST_BELOW, |
| BOOST_ABOVE, |
| NB_FMODES, |
| }; |
| |
| typedef struct ChannelContext { |
| double fa_double[3], fm_double[3]; |
| double dstate_double[2]; |
| double fstate_double[2]; |
| double tstate_double[2]; |
| double lin_gain_double; |
| double detect_double; |
| double threshold_log_double; |
| double new_threshold_log_double; |
| double log_sum_double; |
| double sum_double; |
| float fa_float[3], fm_float[3]; |
| float dstate_float[2]; |
| float fstate_float[2]; |
| float tstate_float[2]; |
| float lin_gain_float; |
| float detect_float; |
| float threshold_log_float; |
| float new_threshold_log_float; |
| float log_sum_float; |
| float sum_float; |
| void *dqueue; |
| void *queue; |
| int position; |
| int size; |
| int front; |
| int back; |
| int detection; |
| int init; |
| } ChannelContext; |
| |
| typedef struct AudioDynamicEqualizerContext { |
| const AVClass *class; |
| |
| double threshold; |
| double threshold_log; |
| double dfrequency; |
| double dqfactor; |
| double tfrequency; |
| double tqfactor; |
| double ratio; |
| double range; |
| double makeup; |
| double dattack; |
| double drelease; |
| double dattack_coef; |
| double drelease_coef; |
| double gattack_coef; |
| double grelease_coef; |
| int mode; |
| int detection; |
| int tftype; |
| int dftype; |
| int precision; |
| int format; |
| int nb_channels; |
| |
| 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]; |
| |
| ChannelContext *cc; |
| } 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 1.0 - exp(-1.0 / (0.001 * 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->cc = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->cc)); |
| if (!s->cc) |
| return AVERROR(ENOMEM); |
| s->nb_channels = inlink->ch_layout.nb_channels; |
| |
| switch (s->format) { |
| case AV_SAMPLE_FMT_DBLP: |
| s->filter_prepare = filter_prepare_double; |
| s->filter_channels = filter_channels_double; |
| break; |
| case AV_SAMPLE_FMT_FLTP: |
| s->filter_prepare = filter_prepare_float; |
| s->filter_channels = filter_channels_float; |
| break; |
| } |
| |
| for (int ch = 0; ch < s->nb_channels; ch++) { |
| ChannelContext *cc = &s->cc[ch]; |
| cc->queue = av_calloc(inlink->sample_rate, sizeof(double)); |
| cc->dqueue = av_calloc(inlink->sample_rate, sizeof(double)); |
| if (!cc->queue || !cc->dqueue) |
| return AVERROR(ENOMEM); |
| } |
| |
| 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; |
| |
| for (int ch = 0; ch < s->nb_channels; ch++) { |
| ChannelContext *cc = &s->cc[ch]; |
| av_freep(&cc->queue); |
| av_freep(&cc->dqueue); |
| } |
| av_freep(&s->cc); |
| } |
| |
| #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 detection attack duration", OFFSET(dattack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 0.01, 2000, FLAGS }, |
| { "release","set detection release duration",OFFSET(drelease), AV_OPT_TYPE_DOUBLE, {.dbl=200}, 0.01, 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, 1000, FLAGS }, |
| { "range", "set max gain", OFFSET(range), AV_OPT_TYPE_DOUBLE, {.dbl=50}, 1, 2000, FLAGS }, |
| { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, LISTEN,NB_FMODES-1,FLAGS, .unit = "mode" }, |
| { "listen", 0, 0, AV_OPT_TYPE_CONST, {.i64=LISTEN}, 0, 0, FLAGS, .unit = "mode" }, |
| { "cutbelow", 0, 0, AV_OPT_TYPE_CONST, {.i64=CUT_BELOW},0, 0, FLAGS, .unit = "mode" }, |
| { "cutabove", 0, 0, AV_OPT_TYPE_CONST, {.i64=CUT_ABOVE},0, 0, FLAGS, .unit = "mode" }, |
| { "boostbelow", 0, 0, AV_OPT_TYPE_CONST, {.i64=BOOST_BELOW},0, 0, FLAGS, .unit = "mode" }, |
| { "boostabove", 0, 0, AV_OPT_TYPE_CONST, {.i64=BOOST_ABOVE},0, 0, FLAGS, .unit = "mode" }, |
| { "dftype", "set detection filter type",OFFSET(dftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, .unit = "dftype" }, |
| { "bandpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "dftype" }, |
| { "lowpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "dftype" }, |
| { "highpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "dftype" }, |
| { "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, .unit = "dftype" }, |
| { "tftype", "set target filter type", OFFSET(tftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, .unit = "tftype" }, |
| { "bell", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "tftype" }, |
| { "lowshelf", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "tftype" }, |
| { "highshelf",0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "tftype" }, |
| { "auto", "set auto threshold", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=DET_OFF},DET_DISABLED,NB_DMODES-1,FLAGS, .unit = "auto" }, |
| { "disabled", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_DISABLED}, 0, 0, FLAGS, .unit = "auto" }, |
| { "off", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_OFF}, 0, 0, FLAGS, .unit = "auto" }, |
| { "on", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_ON}, 0, 0, FLAGS, .unit = "auto" }, |
| { "adaptive", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_ADAPTIVE}, 0, 0, FLAGS, .unit = "auto" }, |
| { "precision", "set processing precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, AF, .unit = "precision" }, |
| { "auto", "set auto processing precision", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "precision" }, |
| { "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "precision" }, |
| { "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, .unit = "precision" }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(adynamicequalizer); |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| }; |
| |
| 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(ff_audio_default_filterpad), |
| FILTER_QUERY_FUNC(query_formats), |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
| AVFILTER_FLAG_SLICE_THREADS, |
| .process_command = ff_filter_process_command, |
| }; |