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/* |
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* Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen |
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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 "libavutil/channel_layout.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 "formats.h" |
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typedef struct StereoToolsContext { |
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const AVClass *class; |
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int softclip; |
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int mute_l; |
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int mute_r; |
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int phase_l; |
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int phase_r; |
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int mode; |
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int bmode_in; |
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int bmode_out; |
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double slev; |
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double sbal; |
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double mlev; |
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double mpan; |
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double phase; |
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double base; |
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double delay; |
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double balance_in; |
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double balance_out; |
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double phase_sin_coef; |
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double phase_cos_coef; |
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double sc_level; |
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double inv_atan_shape; |
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double level_in; |
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double level_out; |
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double *buffer; |
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int length; |
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int pos; |
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} StereoToolsContext; |
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#define OFFSET(x) offsetof(StereoToolsContext, x) |
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#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption stereotools_options[] = { |
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{ "level_in", "set level in", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A }, |
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{ "level_out", "set level out", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A }, |
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{ "balance_in", "set balance in", OFFSET(balance_in), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A }, |
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{ "balance_out", "set balance out", OFFSET(balance_out), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A }, |
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{ "softclip", "enable softclip", OFFSET(softclip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A }, |
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{ "mutel", "mute L", OFFSET(mute_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A }, |
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{ "muter", "mute R", OFFSET(mute_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A }, |
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{ "phasel", "phase L", OFFSET(phase_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A }, |
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{ "phaser", "phase R", OFFSET(phase_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A }, |
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{ "mode", "set stereo mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 10, A, "mode" }, |
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{ "lr>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "mode" }, |
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{ "lr>ms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "mode" }, |
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{ "ms>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "mode" }, |
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{ "lr>ll", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, A, "mode" }, |
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{ "lr>rr", 0, 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, A, "mode" }, |
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{ "lr>l+r", 0, 0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, A, "mode" }, |
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{ "lr>rl", 0, 0, AV_OPT_TYPE_CONST, {.i64=6}, 0, 0, A, "mode" }, |
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{ "ms>ll", 0, 0, AV_OPT_TYPE_CONST, {.i64=7}, 0, 0, A, "mode" }, |
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{ "ms>rr", 0, 0, AV_OPT_TYPE_CONST, {.i64=8}, 0, 0, A, "mode" }, |
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{ "ms>rl", 0, 0, AV_OPT_TYPE_CONST, {.i64=9}, 0, 0, A, "mode" }, |
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{ "lr>l-r", 0, 0, AV_OPT_TYPE_CONST, {.i64=10}, 0, 0, A, "mode" }, |
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{ "slev", "set side level", OFFSET(slev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A }, |
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{ "sbal", "set side balance", OFFSET(sbal), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A }, |
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{ "mlev", "set middle level", OFFSET(mlev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A }, |
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{ "mpan", "set middle pan", OFFSET(mpan), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A }, |
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{ "base", "set stereo base", OFFSET(base), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A }, |
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{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -20, 20, A }, |
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{ "sclevel", "set S/C level", OFFSET(sc_level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 100, A }, |
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{ "phase", "set stereo phase", OFFSET(phase), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 360, A }, |
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{ "bmode_in", "set balance in mode", OFFSET(bmode_in), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" }, |
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{ "balance", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "bmode" }, |
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{ "amplitude", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "bmode" }, |
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{ "power", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "bmode" }, |
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{ "bmode_out", "set balance out mode", OFFSET(bmode_out), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(stereotools); |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *formats = NULL; |
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AVFilterChannelLayouts *layout = NULL; |
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int ret; |
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✓✗✓✗
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if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBL )) < 0 || |
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✓✗ |
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(ret = ff_set_common_formats (ctx , formats )) < 0 || |
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✗✓ |
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(ret = ff_add_channel_layout (&layout , AV_CH_LAYOUT_STEREO)) < 0 || |
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(ret = ff_set_common_channel_layouts (ctx , layout )) < 0) |
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return ret; |
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formats = ff_all_samplerates(); |
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return ff_set_common_samplerates(ctx, formats); |
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} |
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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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StereoToolsContext *s = ctx->priv; |
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s->length = FFALIGN(inlink->sample_rate / 10, 2); |
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✓✗ |
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if (!s->buffer) |
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s->buffer = av_calloc(s->length, sizeof(*s->buffer)); |
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✗✓ |
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if (!s->buffer) |
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return AVERROR(ENOMEM); |
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s->inv_atan_shape = 1.0 / atan(s->sc_level); |
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s->phase_cos_coef = cos(s->phase / 180 * M_PI); |
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s->phase_sin_coef = sin(s->phase / 180 * M_PI); |
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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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StereoToolsContext *s = ctx->priv; |
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const double *src = (const double *)in->data[0]; |
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✗✓ |
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const double sb = s->base < 0 ? s->base * 0.5 : s->base; |
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const double sbal = 1 + s->sbal; |
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const double mpan = 1 + s->mpan; |
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const double slev = s->slev; |
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const double mlev = s->mlev; |
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const double balance_in = s->balance_in; |
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const double balance_out = s->balance_out; |
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const double level_in = s->level_in; |
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const double level_out = s->level_out; |
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const double sc_level = s->sc_level; |
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const double delay = s->delay; |
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const int length = s->length; |
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const int mute_l = s->mute_l; |
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const int mute_r = s->mute_r; |
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const int phase_l = s->phase_l; |
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const int phase_r = s->phase_r; |
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double *buffer = s->buffer; |
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AVFrame *out; |
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double *dst; |
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int nbuf = inlink->sample_rate * (fabs(delay) / 1000.); |
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int n; |
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nbuf -= nbuf % 2; |
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✓✗ |
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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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dst = (double *)out->data[0]; |
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✓✓ |
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for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) { |
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double L = src[0], R = src[1], l, r, m, S, gl, gr, gd; |
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20480 |
L *= level_in; |
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R *= level_in; |
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✗✓ |
20480 |
gl = 1. - FFMAX(0., balance_in); |
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✗✓ |
20480 |
gr = 1. + FFMIN(0., balance_in); |
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✗✗✓ |
20480 |
switch (s->bmode_in) { |
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case 1: |
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gd = gl - gr; |
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gl = 1. + gd; |
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gr = 1. - gd; |
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break; |
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case 2: |
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if (balance_in < 0.) { |
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gr = FFMAX(0.5, gr); |
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gl = 1. / gr; |
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} else if (balance_in > 0.) { |
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gl = FFMAX(0.5, gl); |
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gr = 1. / gl; |
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} |
199 |
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break; |
200 |
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} |
201 |
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20480 |
L *= gl; |
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20480 |
R *= gr; |
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|
204 |
✗✓ |
20480 |
if (s->softclip) { |
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R = s->inv_atan_shape * atan(R * sc_level); |
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L = s->inv_atan_shape * atan(L * sc_level); |
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} |
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209 |
✓✗✗✗ ✗✗✗✗ ✗✗✗✗
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20480 |
switch (s->mode) { |
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20480 |
case 0: |
211 |
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20480 |
m = (L + R) * 0.5; |
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20480 |
S = (L - R) * 0.5; |
213 |
✗✓✗✓
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20480 |
l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal); |
214 |
✗✓✗✓
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20480 |
r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal); |
215 |
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20480 |
L = l; |
216 |
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20480 |
R = r; |
217 |
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20480 |
break; |
218 |
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case 1: |
219 |
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l = L * FFMIN(1., 2. - sbal); |
220 |
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r = R * FFMIN(1., sbal); |
221 |
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L = 0.5 * (l + r) * mlev; |
222 |
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R = 0.5 * (l - r) * slev; |
223 |
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break; |
224 |
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case 2: |
225 |
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l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal); |
226 |
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r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal); |
227 |
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L = l; |
228 |
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R = r; |
229 |
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break; |
230 |
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case 3: |
231 |
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R = L; |
232 |
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break; |
233 |
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case 4: |
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L = R; |
235 |
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break; |
236 |
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case 5: |
237 |
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L = (L + R) * 0.5; |
238 |
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R = L; |
239 |
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break; |
240 |
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case 6: |
241 |
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l = L; |
242 |
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L = R; |
243 |
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R = l; |
244 |
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m = (L + R) * 0.5; |
245 |
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S = (L - R) * 0.5; |
246 |
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l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal); |
247 |
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r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal); |
248 |
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L = l; |
249 |
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R = r; |
250 |
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break; |
251 |
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case 7: |
252 |
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l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal); |
253 |
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L = l; |
254 |
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R = l; |
255 |
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break; |
256 |
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case 8: |
257 |
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r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal); |
258 |
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L = r; |
259 |
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R = r; |
260 |
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break; |
261 |
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case 9: |
262 |
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l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal); |
263 |
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r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal); |
264 |
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L = r; |
265 |
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R = l; |
266 |
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break; |
267 |
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case 10: |
268 |
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L = (L - R) * 0.5; |
269 |
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R = L; |
270 |
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break; |
271 |
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} |
272 |
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|
273 |
|
20480 |
L *= 1. - mute_l; |
274 |
|
20480 |
R *= 1. - mute_r; |
275 |
|
|
|
276 |
|
20480 |
L *= (2. * (1. - phase_l)) - 1.; |
277 |
|
20480 |
R *= (2. * (1. - phase_r)) - 1.; |
278 |
|
|
|
279 |
|
20480 |
buffer[s->pos ] = L; |
280 |
|
20480 |
buffer[s->pos+1] = R; |
281 |
|
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|
282 |
✗✓ |
20480 |
if (delay > 0.) { |
283 |
|
|
R = buffer[(s->pos - (int)nbuf + 1 + length) % length]; |
284 |
✗✓ |
20480 |
} else if (delay < 0.) { |
285 |
|
|
L = buffer[(s->pos - (int)nbuf + length) % length]; |
286 |
|
|
} |
287 |
|
|
|
288 |
|
20480 |
l = L + sb * L - sb * R; |
289 |
|
20480 |
r = R + sb * R - sb * L; |
290 |
|
|
|
291 |
|
20480 |
L = l; |
292 |
|
20480 |
R = r; |
293 |
|
|
|
294 |
|
20480 |
l = L * s->phase_cos_coef - R * s->phase_sin_coef; |
295 |
|
20480 |
r = L * s->phase_sin_coef + R * s->phase_cos_coef; |
296 |
|
|
|
297 |
|
20480 |
L = l; |
298 |
|
20480 |
R = r; |
299 |
|
|
|
300 |
|
20480 |
s->pos = (s->pos + 2) % s->length; |
301 |
|
|
|
302 |
✗✓ |
20480 |
gl = 1. - FFMAX(0., balance_out); |
303 |
✗✓ |
20480 |
gr = 1. + FFMIN(0., balance_out); |
304 |
✗✗✓ |
20480 |
switch (s->bmode_out) { |
305 |
|
|
case 1: |
306 |
|
|
gd = gl - gr; |
307 |
|
|
gl = 1. + gd; |
308 |
|
|
gr = 1. - gd; |
309 |
|
|
break; |
310 |
|
|
case 2: |
311 |
|
|
if (balance_out < 0.) { |
312 |
|
|
gr = FFMAX(0.5, gr); |
313 |
|
|
gl = 1. / gr; |
314 |
|
|
} else if (balance_out > 0.) { |
315 |
|
|
gl = FFMAX(0.5, gl); |
316 |
|
|
gr = 1. / gl; |
317 |
|
|
} |
318 |
|
|
break; |
319 |
|
|
} |
320 |
|
20480 |
L *= gl; |
321 |
|
20480 |
R *= gr; |
322 |
|
|
|
323 |
|
|
|
324 |
|
20480 |
L *= level_out; |
325 |
|
20480 |
R *= level_out; |
326 |
|
|
|
327 |
✗✓ |
20480 |
if (ctx->is_disabled) { |
328 |
|
|
dst[0] = src[0]; |
329 |
|
|
dst[1] = src[1]; |
330 |
|
|
} else { |
331 |
|
20480 |
dst[0] = L; |
332 |
|
20480 |
dst[1] = R; |
333 |
|
|
} |
334 |
|
|
} |
335 |
|
|
|
336 |
✗✓ |
20 |
if (out != in) |
337 |
|
|
av_frame_free(&in); |
338 |
|
20 |
return ff_filter_frame(outlink, out); |
339 |
|
|
} |
340 |
|
|
|
341 |
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
342 |
|
|
char *res, int res_len, int flags) |
343 |
|
|
{ |
344 |
|
|
int ret; |
345 |
|
|
|
346 |
|
|
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags); |
347 |
|
|
if (ret < 0) |
348 |
|
|
return ret; |
349 |
|
|
|
350 |
|
|
return config_input(ctx->inputs[0]); |
351 |
|
|
} |
352 |
|
|
|
353 |
|
1 |
static av_cold void uninit(AVFilterContext *ctx) |
354 |
|
|
{ |
355 |
|
1 |
StereoToolsContext *s = ctx->priv; |
356 |
|
|
|
357 |
|
1 |
av_freep(&s->buffer); |
358 |
|
1 |
} |
359 |
|
|
|
360 |
|
|
static const AVFilterPad inputs[] = { |
361 |
|
|
{ |
362 |
|
|
.name = "default", |
363 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
364 |
|
|
.filter_frame = filter_frame, |
365 |
|
|
.config_props = config_input, |
366 |
|
|
}, |
367 |
|
|
{ NULL } |
368 |
|
|
}; |
369 |
|
|
|
370 |
|
|
static const AVFilterPad outputs[] = { |
371 |
|
|
{ |
372 |
|
|
.name = "default", |
373 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
374 |
|
|
}, |
375 |
|
|
{ NULL } |
376 |
|
|
}; |
377 |
|
|
|
378 |
|
|
AVFilter ff_af_stereotools = { |
379 |
|
|
.name = "stereotools", |
380 |
|
|
.description = NULL_IF_CONFIG_SMALL("Apply various stereo tools."), |
381 |
|
|
.query_formats = query_formats, |
382 |
|
|
.priv_size = sizeof(StereoToolsContext), |
383 |
|
|
.priv_class = &stereotools_class, |
384 |
|
|
.uninit = uninit, |
385 |
|
|
.inputs = inputs, |
386 |
|
|
.outputs = outputs, |
387 |
|
|
.process_command = process_command, |
388 |
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
389 |
|
|
}; |