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/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <float.h> |
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#include "libavutil/ffmath.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "avfilter.h" |
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#include "audio.h" |
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#include "filters.h" |
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#include "formats.h" |
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enum DetectionModes { |
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DET_UNSET = 0, |
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DET_DISABLED, |
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DET_OFF, |
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DET_ON, |
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DET_ADAPTIVE, |
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NB_DMODES, |
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}; |
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enum FilterModes { |
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LISTEN = -1, |
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CUT_BELOW, |
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CUT_ABOVE, |
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BOOST_BELOW, |
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BOOST_ABOVE, |
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NB_FMODES, |
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}; |
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typedef struct ChannelContext { |
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double fa_double[3], fm_double[3]; |
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double dstate_double[2]; |
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double fstate_double[2]; |
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double tstate_double[2]; |
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double lin_gain_double; |
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double detect_double; |
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double threshold_log_double; |
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double new_threshold_log_double; |
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double log_sum_double; |
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double sum_double; |
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float fa_float[3], fm_float[3]; |
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float dstate_float[2]; |
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float fstate_float[2]; |
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float tstate_float[2]; |
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float lin_gain_float; |
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float detect_float; |
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float threshold_log_float; |
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float new_threshold_log_float; |
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float log_sum_float; |
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float sum_float; |
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void *dqueue; |
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void *queue; |
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int position; |
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int size; |
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int front; |
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int back; |
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int detection; |
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int init; |
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} ChannelContext; |
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typedef struct AudioDynamicEqualizerContext { |
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const AVClass *class; |
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double threshold; |
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double threshold_log; |
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double dfrequency; |
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double dqfactor; |
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double tfrequency; |
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double tqfactor; |
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double ratio; |
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double range; |
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double makeup; |
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double dattack; |
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double drelease; |
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double dattack_coef; |
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double drelease_coef; |
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double gattack_coef; |
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double grelease_coef; |
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int mode; |
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int detection; |
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int tftype; |
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int dftype; |
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int precision; |
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int format; |
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int nb_channels; |
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int (*filter_prepare)(AVFilterContext *ctx); |
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int (*filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); |
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double da_double[3], dm_double[3]; |
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float da_float[3], dm_float[3]; |
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ChannelContext *cc; |
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} AudioDynamicEqualizerContext; |
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static int query_formats(const AVFilterContext *ctx, |
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AVFilterFormatsConfig **cfg_in, |
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AVFilterFormatsConfig **cfg_out) |
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{ |
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const AudioDynamicEqualizerContext *s = ctx->priv; |
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static const enum AVSampleFormat sample_fmts[3][3] = { |
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{ AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }, |
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{ AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }, |
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{ AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }, |
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}; |
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int ret; |
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if ((ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, |
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sample_fmts[s->precision])) < 0) |
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return ret; |
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return 0; |
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} |
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static double get_coef(double x, double sr) |
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{ |
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return 1.0 - exp(-1.0 / (0.001 * x * sr)); |
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} |
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typedef struct ThreadData { |
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AVFrame *in, *out; |
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} ThreadData; |
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#define DEPTH 32 |
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#include "adynamicequalizer_template.c" |
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#undef DEPTH |
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#define DEPTH 64 |
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#include "adynamicequalizer_template.c" |
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static int config_input(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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AudioDynamicEqualizerContext *s = ctx->priv; |
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s->format = inlink->format; |
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s->cc = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->cc)); |
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if (!s->cc) |
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return AVERROR(ENOMEM); |
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s->nb_channels = inlink->ch_layout.nb_channels; |
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switch (s->format) { |
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case AV_SAMPLE_FMT_DBLP: |
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s->filter_prepare = filter_prepare_double; |
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s->filter_channels = filter_channels_double; |
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break; |
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case AV_SAMPLE_FMT_FLTP: |
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s->filter_prepare = filter_prepare_float; |
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s->filter_channels = filter_channels_float; |
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break; |
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} |
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for (int ch = 0; ch < s->nb_channels; ch++) { |
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ChannelContext *cc = &s->cc[ch]; |
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cc->queue = av_calloc(inlink->sample_rate, sizeof(double)); |
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cc->dqueue = av_calloc(inlink->sample_rate, sizeof(double)); |
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if (!cc->queue || !cc->dqueue) |
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return AVERROR(ENOMEM); |
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} |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AudioDynamicEqualizerContext *s = ctx->priv; |
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ThreadData td; |
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AVFrame *out; |
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if (av_frame_is_writable(in)) { |
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out = in; |
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} else { |
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out = ff_get_audio_buffer(outlink, in->nb_samples); |
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if (!out) { |
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av_frame_free(&in); |
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return AVERROR(ENOMEM); |
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} |
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av_frame_copy_props(out, in); |
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} |
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td.in = in; |
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td.out = out; |
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s->filter_prepare(ctx); |
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ff_filter_execute(ctx, s->filter_channels, &td, NULL, |
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FFMIN(outlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx))); |
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if (out != in) |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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AudioDynamicEqualizerContext *s = ctx->priv; |
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for (int ch = 0; ch < s->nb_channels; ch++) { |
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ChannelContext *cc = &s->cc[ch]; |
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av_freep(&cc->queue); |
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av_freep(&cc->dqueue); |
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} |
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av_freep(&s->cc); |
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} |
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#define OFFSET(x) offsetof(AudioDynamicEqualizerContext, x) |
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#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
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#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption adynamicequalizer_options[] = { |
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{ "threshold", "set detection threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 100, FLAGS }, |
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{ "dfrequency", "set detection frequency", OFFSET(dfrequency), AV_OPT_TYPE_DOUBLE, {.dbl=1000}, 2, 1000000, FLAGS }, |
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{ "dqfactor", "set detection Q factor", OFFSET(dqfactor), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.001, 1000, FLAGS }, |
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{ "tfrequency", "set target frequency", OFFSET(tfrequency), AV_OPT_TYPE_DOUBLE, {.dbl=1000}, 2, 1000000, FLAGS }, |
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{ "tqfactor", "set target Q factor", OFFSET(tqfactor), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.001, 1000, FLAGS }, |
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{ "attack", "set detection attack duration", OFFSET(dattack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 0.01, 2000, FLAGS }, |
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{ "release","set detection release duration",OFFSET(drelease), AV_OPT_TYPE_DOUBLE, {.dbl=200}, 0.01, 2000, FLAGS }, |
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{ "ratio", "set ratio factor", OFFSET(ratio), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 30, FLAGS }, |
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{ "makeup", "set makeup gain", OFFSET(makeup), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1000, FLAGS }, |
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{ "range", "set max gain", OFFSET(range), AV_OPT_TYPE_DOUBLE, {.dbl=50}, 1, 2000, FLAGS }, |
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{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, LISTEN,NB_FMODES-1,FLAGS, .unit = "mode" }, |
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{ "listen", 0, 0, AV_OPT_TYPE_CONST, {.i64=LISTEN}, 0, 0, FLAGS, .unit = "mode" }, |
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{ "cutbelow", 0, 0, AV_OPT_TYPE_CONST, {.i64=CUT_BELOW},0, 0, FLAGS, .unit = "mode" }, |
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{ "cutabove", 0, 0, AV_OPT_TYPE_CONST, {.i64=CUT_ABOVE},0, 0, FLAGS, .unit = "mode" }, |
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{ "boostbelow", 0, 0, AV_OPT_TYPE_CONST, {.i64=BOOST_BELOW},0, 0, FLAGS, .unit = "mode" }, |
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{ "boostabove", 0, 0, AV_OPT_TYPE_CONST, {.i64=BOOST_ABOVE},0, 0, FLAGS, .unit = "mode" }, |
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{ "dftype", "set detection filter type",OFFSET(dftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, .unit = "dftype" }, |
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{ "bandpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "dftype" }, |
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{ "lowpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "dftype" }, |
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{ "highpass", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "dftype" }, |
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{ "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, .unit = "dftype" }, |
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{ "tftype", "set target filter type", OFFSET(tftype), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, .unit = "tftype" }, |
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{ "bell", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "tftype" }, |
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{ "lowshelf", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "tftype" }, |
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{ "highshelf",0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "tftype" }, |
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{ "auto", "set auto threshold", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=DET_OFF},DET_DISABLED,NB_DMODES-1,FLAGS, .unit = "auto" }, |
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{ "disabled", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_DISABLED}, 0, 0, FLAGS, .unit = "auto" }, |
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{ "off", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_OFF}, 0, 0, FLAGS, .unit = "auto" }, |
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{ "on", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_ON}, 0, 0, FLAGS, .unit = "auto" }, |
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{ "adaptive", 0, 0, AV_OPT_TYPE_CONST, {.i64=DET_ADAPTIVE}, 0, 0, FLAGS, .unit = "auto" }, |
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{ "precision", "set processing precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, AF, .unit = "precision" }, |
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{ "auto", "set auto processing precision", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "precision" }, |
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{ "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "precision" }, |
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{ "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, .unit = "precision" }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(adynamicequalizer); |
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static const AVFilterPad inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_AUDIO, |
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.filter_frame = filter_frame, |
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.config_props = config_input, |
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}, |
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}; |
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const AVFilter ff_af_adynamicequalizer = { |
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.name = "adynamicequalizer", |
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.description = NULL_IF_CONFIG_SMALL("Apply Dynamic Equalization of input audio."), |
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.priv_size = sizeof(AudioDynamicEqualizerContext), |
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.priv_class = &adynamicequalizer_class, |
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.uninit = uninit, |
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FILTER_INPUTS(inputs), |
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FILTER_OUTPUTS(ff_audio_default_filterpad), |
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FILTER_QUERY_FUNC2(query_formats), |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
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AVFILTER_FLAG_SLICE_THREADS, |
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.process_command = ff_filter_process_command, |
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}; |
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