mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
550 lines
17 KiB
C
550 lines
17 KiB
C
/*
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* Copyright (c) 2016 Paul B Mahol
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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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/**
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* @file
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* SpectrumSynth filter
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* @todo support float pixel format
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*/
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#include "libavutil/tx.h"
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ffmath.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "audio.h"
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#include "video.h"
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#include "filters.h"
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#include "internal.h"
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#include "window_func.h"
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enum MagnitudeScale { LINEAR, LOG, NB_SCALES };
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enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
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enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
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typedef struct SpectrumSynthContext {
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const AVClass *class;
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int sample_rate;
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int channels;
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int scale;
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int sliding;
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int win_func;
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float overlap;
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int orientation;
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AVFrame *magnitude, *phase;
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AVTXContext *fft; ///< Fast Fourier Transform context
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av_tx_fn tx_fn;
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AVComplexFloat **fft_in; ///< bins holder for each (displayed) channels
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AVComplexFloat **fft_out; ///< bins holder for each (displayed) channels
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int win_size;
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int size;
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int nb_freq;
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int hop_size;
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int start, end;
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int xpos;
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int xend;
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int64_t pts;
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float factor;
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AVFrame *buffer;
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float *window_func_lut; ///< Window function LUT
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} SpectrumSynthContext;
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#define OFFSET(x) offsetof(SpectrumSynthContext, x)
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#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
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#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption spectrumsynth_options[] = {
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{ "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 15, INT_MAX, A },
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{ "channels", "set channels", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 1}, 1, 8, A },
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{ "scale", "set input amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = LOG}, 0, NB_SCALES-1, V, "scale" },
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, V, "scale" },
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{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, V, "scale" },
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{ "slide", "set input sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = FULLFRAME}, 0, NB_SLIDES-1, V, "slide" },
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{ "replace", "consume old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, V, "slide" },
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{ "scroll", "consume only most right column", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, V, "slide" },
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{ "fullframe", "consume full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, V, "slide" },
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{ "rscroll", "consume only most left column", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, V, "slide" },
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WIN_FUNC_OPTION("win_func", OFFSET(win_func), A, 0),
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{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, A },
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{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, V, "orientation" },
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{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, V, "orientation" },
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{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, V, "orientation" },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(spectrumsynth);
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static int query_formats(AVFilterContext *ctx)
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{
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SpectrumSynthContext *s = ctx->priv;
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layout = NULL;
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AVFilterLink *magnitude = ctx->inputs[0];
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AVFilterLink *phase = ctx->inputs[1];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_YUV444P16, AV_PIX_FMT_NONE };
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int ret, sample_rates[] = { 48000, -1 };
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref (formats, &outlink->incfg.formats )) < 0 ||
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(ret = ff_add_channel_layout (&layout, FF_COUNT2LAYOUT(s->channels))) < 0 ||
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(ret = ff_channel_layouts_ref (layout , &outlink->incfg.channel_layouts)) < 0)
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return ret;
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sample_rates[0] = s->sample_rate;
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formats = ff_make_format_list(sample_rates);
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if (!formats)
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return AVERROR(ENOMEM);
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if ((ret = ff_formats_ref(formats, &outlink->incfg.samplerates)) < 0)
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return ret;
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formats = ff_make_format_list(pix_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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if ((ret = ff_formats_ref(formats, &magnitude->outcfg.formats)) < 0)
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return ret;
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formats = ff_make_format_list(pix_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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if ((ret = ff_formats_ref(formats, &phase->outcfg.formats)) < 0)
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return ret;
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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SpectrumSynthContext *s = ctx->priv;
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int width = ctx->inputs[0]->w;
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int height = ctx->inputs[0]->h;
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AVRational time_base = ctx->inputs[0]->time_base;
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AVRational frame_rate = ctx->inputs[0]->frame_rate;
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float factor, overlap, scale;
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int i, ch, ret;
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outlink->sample_rate = s->sample_rate;
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outlink->time_base = (AVRational){1, s->sample_rate};
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if (width != ctx->inputs[1]->w ||
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height != ctx->inputs[1]->h) {
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av_log(ctx, AV_LOG_ERROR,
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"Magnitude and Phase sizes differ (%dx%d vs %dx%d).\n",
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width, height,
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ctx->inputs[1]->w, ctx->inputs[1]->h);
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return AVERROR_INVALIDDATA;
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} else if (av_cmp_q(time_base, ctx->inputs[1]->time_base) != 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Magnitude and Phase time bases differ (%d/%d vs %d/%d).\n",
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time_base.num, time_base.den,
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ctx->inputs[1]->time_base.num,
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ctx->inputs[1]->time_base.den);
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return AVERROR_INVALIDDATA;
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} else if (av_cmp_q(frame_rate, ctx->inputs[1]->frame_rate) != 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Magnitude and Phase framerates differ (%d/%d vs %d/%d).\n",
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frame_rate.num, frame_rate.den,
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ctx->inputs[1]->frame_rate.num,
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ctx->inputs[1]->frame_rate.den);
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return AVERROR_INVALIDDATA;
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}
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s->size = s->orientation == VERTICAL ? height / s->channels : width / s->channels;
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s->xend = s->orientation == VERTICAL ? width : height;
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s->win_size = s->size * 2;
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s->nb_freq = s->size;
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ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 1, s->win_size, &scale, 0);
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if (ret < 0) {
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av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
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"The window size might be too high.\n");
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return ret;
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}
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s->fft_in = av_calloc(s->channels, sizeof(*s->fft_in));
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if (!s->fft_in)
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return AVERROR(ENOMEM);
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s->fft_out = av_calloc(s->channels, sizeof(*s->fft_out));
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if (!s->fft_out)
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return AVERROR(ENOMEM);
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for (ch = 0; ch < s->channels; ch++) {
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s->fft_in[ch] = av_calloc(FFALIGN(s->win_size, av_cpu_max_align()), sizeof(**s->fft_in));
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if (!s->fft_in[ch])
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return AVERROR(ENOMEM);
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s->fft_out[ch] = av_calloc(FFALIGN(s->win_size, av_cpu_max_align()), sizeof(**s->fft_out));
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if (!s->fft_out[ch])
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return AVERROR(ENOMEM);
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}
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s->buffer = ff_get_audio_buffer(outlink, s->win_size * 2);
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if (!s->buffer)
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return AVERROR(ENOMEM);
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/* pre-calc windowing function */
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s->window_func_lut = av_realloc_f(s->window_func_lut, s->win_size,
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sizeof(*s->window_func_lut));
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if (!s->window_func_lut)
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return AVERROR(ENOMEM);
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generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
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if (s->overlap == 1)
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s->overlap = overlap;
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s->hop_size = (1 - s->overlap) * s->win_size;
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for (factor = 0, i = 0; i < s->win_size; i++) {
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factor += s->window_func_lut[i] * s->window_func_lut[i];
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}
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s->factor = (factor / s->win_size) / FFMAX(1 / (1 - s->overlap) - 1, 1);
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return 0;
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}
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static void read16_fft_bin(SpectrumSynthContext *s,
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int x, int y, int f, int ch)
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{
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const int m_linesize = s->magnitude->linesize[0];
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const int p_linesize = s->phase->linesize[0];
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const uint16_t *m = (uint16_t *)(s->magnitude->data[0] + y * m_linesize);
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const uint16_t *p = (uint16_t *)(s->phase->data[0] + y * p_linesize);
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float magnitude, phase;
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switch (s->scale) {
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case LINEAR:
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magnitude = m[x] / (double)UINT16_MAX;
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break;
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case LOG:
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magnitude = ff_exp10(((m[x] / (double)UINT16_MAX) - 1.) * 6.);
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break;
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default:
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av_assert0(0);
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}
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phase = ((p[x] / (double)UINT16_MAX) * 2. - 1.) * M_PI;
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s->fft_in[ch][f].re = magnitude * cos(phase);
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s->fft_in[ch][f].im = magnitude * sin(phase);
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}
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static void read8_fft_bin(SpectrumSynthContext *s,
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int x, int y, int f, int ch)
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{
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const int m_linesize = s->magnitude->linesize[0];
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const int p_linesize = s->phase->linesize[0];
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const uint8_t *m = (uint8_t *)(s->magnitude->data[0] + y * m_linesize);
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const uint8_t *p = (uint8_t *)(s->phase->data[0] + y * p_linesize);
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float magnitude, phase;
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switch (s->scale) {
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case LINEAR:
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magnitude = m[x] / (double)UINT8_MAX;
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break;
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case LOG:
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magnitude = ff_exp10(((m[x] / (double)UINT8_MAX) - 1.) * 6.);
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break;
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default:
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av_assert0(0);
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}
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phase = ((p[x] / (double)UINT8_MAX) * 2. - 1.) * M_PI;
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s->fft_in[ch][f].re = magnitude * cos(phase);
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s->fft_in[ch][f].im = magnitude * sin(phase);
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}
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static void read_fft_data(AVFilterContext *ctx, int x, int h, int ch)
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{
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SpectrumSynthContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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int start = h * (s->channels - ch) - 1;
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int end = h * (s->channels - ch - 1);
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int y, f;
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switch (s->orientation) {
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case VERTICAL:
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switch (inlink->format) {
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case AV_PIX_FMT_YUV444P16:
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case AV_PIX_FMT_GRAY16:
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for (y = start, f = 0; y >= end; y--, f++) {
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read16_fft_bin(s, x, y, f, ch);
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}
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break;
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case AV_PIX_FMT_YUVJ444P:
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case AV_PIX_FMT_YUV444P:
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case AV_PIX_FMT_GRAY8:
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for (y = start, f = 0; y >= end; y--, f++) {
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read8_fft_bin(s, x, y, f, ch);
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}
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break;
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}
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break;
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case HORIZONTAL:
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switch (inlink->format) {
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case AV_PIX_FMT_YUV444P16:
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case AV_PIX_FMT_GRAY16:
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for (y = end, f = 0; y <= start; y++, f++) {
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read16_fft_bin(s, y, x, f, ch);
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}
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break;
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case AV_PIX_FMT_YUVJ444P:
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case AV_PIX_FMT_YUV444P:
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case AV_PIX_FMT_GRAY8:
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for (y = end, f = 0; y <= start; y++, f++) {
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read8_fft_bin(s, y, x, f, ch);
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}
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break;
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}
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break;
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}
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}
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static void synth_window(AVFilterContext *ctx, int x)
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{
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SpectrumSynthContext *s = ctx->priv;
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const int h = s->size;
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int nb = s->win_size;
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int y, f, ch;
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for (ch = 0; ch < s->channels; ch++) {
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read_fft_data(ctx, x, h, ch);
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for (y = h; y <= s->nb_freq; y++) {
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s->fft_in[ch][y].re = 0;
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s->fft_in[ch][y].im = 0;
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}
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for (y = s->nb_freq + 1, f = s->nb_freq - 1; y < nb; y++, f--) {
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s->fft_in[ch][y].re = s->fft_in[ch][f].re;
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s->fft_in[ch][y].im = -s->fft_in[ch][f].im;
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}
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s->tx_fn(s->fft, s->fft_out[ch], s->fft_in[ch], sizeof(float));
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}
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}
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static int try_push_frame(AVFilterContext *ctx, int x)
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{
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SpectrumSynthContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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const float factor = s->factor;
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int ch, n, i, ret;
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int start, end;
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AVFrame *out;
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synth_window(ctx, x);
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for (ch = 0; ch < s->channels; ch++) {
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float *buf = (float *)s->buffer->extended_data[ch];
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int j, k;
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start = s->start;
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end = s->end;
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k = end;
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for (i = 0, j = start; j < k && i < s->win_size; i++, j++) {
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buf[j] += s->fft_out[ch][i].re;
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}
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for (; i < s->win_size; i++, j++) {
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buf[j] = s->fft_out[ch][i].re;
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}
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start += s->hop_size;
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end = j;
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if (start >= s->win_size) {
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start -= s->win_size;
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end -= s->win_size;
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if (ch == s->channels - 1) {
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float *dst;
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int c;
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out = ff_get_audio_buffer(outlink, s->win_size);
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if (!out) {
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av_frame_free(&s->magnitude);
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av_frame_free(&s->phase);
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return AVERROR(ENOMEM);
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}
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out->pts = s->pts;
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s->pts += s->win_size;
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for (c = 0; c < s->channels; c++) {
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dst = (float *)out->extended_data[c];
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buf = (float *)s->buffer->extended_data[c];
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for (n = 0; n < s->win_size; n++) {
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dst[n] = buf[n] * factor;
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}
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memmove(buf, buf + s->win_size, s->win_size * 4);
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}
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ret = ff_filter_frame(outlink, out);
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if (ret < 0)
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return ret;
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}
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}
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}
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s->start = start;
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s->end = end;
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return 0;
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}
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static int try_push_frames(AVFilterContext *ctx)
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{
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SpectrumSynthContext *s = ctx->priv;
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int ret, x;
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if (!(s->magnitude && s->phase))
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return 0;
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switch (s->sliding) {
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case REPLACE:
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ret = try_push_frame(ctx, s->xpos);
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s->xpos++;
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if (s->xpos >= s->xend)
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s->xpos = 0;
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break;
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case SCROLL:
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s->xpos = s->xend - 1;
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ret = try_push_frame(ctx, s->xpos);
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break;
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case RSCROLL:
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s->xpos = 0;
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ret = try_push_frame(ctx, s->xpos);
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break;
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case FULLFRAME:
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for (x = 0; x < s->xend; x++) {
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ret = try_push_frame(ctx, x);
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if (ret < 0)
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
av_frame_free(&s->magnitude);
|
|
av_frame_free(&s->phase);
|
|
return ret;
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
SpectrumSynthContext *s = ctx->priv;
|
|
AVFrame **staging[2] = { &s->magnitude, &s->phase };
|
|
int64_t pts;
|
|
int i, ret;
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (*staging[i])
|
|
continue;
|
|
ret = ff_inlink_consume_frame(ctx->inputs[i], staging[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret) {
|
|
ff_filter_set_ready(ctx, 10);
|
|
return try_push_frames(ctx);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (ff_inlink_acknowledge_status(ctx->inputs[i], &ret, &pts)) {
|
|
ff_outlink_set_status(ctx->outputs[0], ret, pts);
|
|
ff_inlink_set_status(ctx->inputs[1 - i], ret);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (ff_outlink_frame_wanted(ctx->outputs[0])) {
|
|
for (i = 0; i < 2; i++) {
|
|
if (!*staging[i])
|
|
ff_inlink_request_frame(ctx->inputs[i]);
|
|
}
|
|
}
|
|
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
SpectrumSynthContext *s = ctx->priv;
|
|
int i;
|
|
|
|
av_frame_free(&s->magnitude);
|
|
av_frame_free(&s->phase);
|
|
av_frame_free(&s->buffer);
|
|
|
|
av_tx_uninit(&s->fft);
|
|
|
|
if (s->fft_in) {
|
|
for (i = 0; i < s->channels; i++)
|
|
av_freep(&s->fft_in[i]);
|
|
}
|
|
if (s->fft_out) {
|
|
for (i = 0; i < s->channels; i++)
|
|
av_freep(&s->fft_out[i]);
|
|
}
|
|
av_freep(&s->fft_in);
|
|
av_freep(&s->fft_out);
|
|
av_freep(&s->window_func_lut);
|
|
}
|
|
|
|
static const AVFilterPad spectrumsynth_inputs[] = {
|
|
{
|
|
.name = "magnitude",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{
|
|
.name = "phase",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad spectrumsynth_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vaf_spectrumsynth = {
|
|
.name = "spectrumsynth",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input spectrum videos to audio output."),
|
|
.uninit = uninit,
|
|
.activate = activate,
|
|
.priv_size = sizeof(SpectrumSynthContext),
|
|
FILTER_INPUTS(spectrumsynth_inputs),
|
|
FILTER_OUTPUTS(spectrumsynth_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
.priv_class = &spectrumsynth_class,
|
|
};
|