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Diffstat (limited to 'libavfilter/avf_showspectrum.c')
-rw-r--r-- | libavfilter/avf_showspectrum.c | 1228 |
1 files changed, 1228 insertions, 0 deletions
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c new file mode 100644 index 0000000000..6be97af529 --- /dev/null +++ b/libavfilter/avf_showspectrum.c @@ -0,0 +1,1228 @@ +/* + * Copyright (c) 2012-2013 Clément Bœsch + * Copyright (c) 2013 Rudolf Polzer <divverent@xonotic.org> + * Copyright (c) 2015 Paul B Mahol + * + * 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 + */ + +/** + * @file + * audio to spectrum (video) transmedia filter, based on ffplay rdft showmode + * (by Michael Niedermayer) and lavfi/avf_showwaves (by Stefano Sabatini). + */ + +#include <math.h> + +#include "libavcodec/avfft.h" +#include "libavutil/audio_fifo.h" +#include "libavutil/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/channel_layout.h" +#include "libavutil/opt.h" +#include "libavutil/xga_font_data.h" +#include "audio.h" +#include "video.h" +#include "avfilter.h" +#include "internal.h" +#include "window_func.h" + +enum DisplayMode { COMBINED, SEPARATE, NB_MODES }; +enum DataMode { D_MAGNITUDE, D_PHASE, NB_DMODES }; +enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES }; +enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, NB_CLMODES }; +enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES }; +enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS }; + +typedef struct { + const AVClass *class; + int w, h; + AVFrame *outpicref; + int nb_display_channels; + int orientation; + int channel_width; + int channel_height; + int sliding; ///< 1 if sliding mode, 0 otherwise + int mode; ///< channel display mode + int color_mode; ///< display color scheme + int scale; + float saturation; ///< color saturation multiplier + int data; + int xpos; ///< x position (current column) + FFTContext *fft; ///< Fast Fourier Transform context + int fft_bits; ///< number of bits (FFT window size = 1<<fft_bits) + FFTComplex **fft_data; ///< bins holder for each (displayed) channels + float *window_func_lut; ///< Window function LUT + float **magnitudes; + float **phases; + int win_func; + int win_size; + double win_scale; + float overlap; + float gain; + int hop_size; + float *combine_buffer; ///< color combining buffer (3 * h items) + AVAudioFifo *fifo; + int64_t pts; + int single_pic; + int legend; + int start_x, start_y; +} ShowSpectrumContext; + +#define OFFSET(x) offsetof(ShowSpectrumContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption showspectrum_options[] = { + { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS }, + { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS }, + { "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES-1, FLAGS, "slide" }, + { "replace", "replace old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" }, + { "scroll", "scroll from right to left", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" }, + { "rscroll", "scroll from left to right", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, FLAGS, "slide" }, + { "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, "slide" }, + { "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, COMBINED, NB_MODES-1, FLAGS, "mode" }, + { "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" }, + { "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" }, + { "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, "color" }, + { "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" }, + { "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" }, + { "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" }, + { "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" }, + { "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" }, + { "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" }, + { "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" }, + { "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" }, + { "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" }, + { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" }, + { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" }, + { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" }, + { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" }, + { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" }, + { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" }, + { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" }, + { "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS }, + { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" }, + { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" }, + { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" }, + { "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, + { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, + { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" }, + { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" }, + { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" }, + { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" }, + { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" }, + { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" }, + { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" }, + { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" }, + { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" }, + { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" }, + { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" }, + { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" }, + { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" }, + { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" }, + { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" }, + { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS }, + { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS }, + { "data", "set data mode", OFFSET(data), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_DMODES-1, FLAGS, "data" }, + { "magnitude", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_MAGNITUDE}, 0, 0, FLAGS, "data" }, + { "phase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_PHASE}, 0, 0, FLAGS, "data" }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(showspectrum); + +static const struct ColorTable { + float a, y, u, v; +} color_table[][8] = { + [INTENSITY] = { + { 0, 0, 0, 0 }, + { 0.13, .03587126228984074, .1573300977624594, -.02548747583751842 }, + { 0.30, .18572281794568020, .1772436246393981, .17475554840414750 }, + { 0.60, .28184980583656130, -.1593064119945782, .47132074554608920 }, + { 0.73, .65830621175547810, -.3716070802232764, .24352759331252930 }, + { 0.78, .76318535758242900, -.4307467689263783, .16866496622310430 }, + { 0.91, .95336363636363640, -.2045454545454546, .03313636363636363 }, + { 1, 1, 0, 0 }}, + [RAINBOW] = { + { 0, 0, 0, 0 }, + { 0.13, 44/256., (189-128)/256., (138-128)/256. }, + { 0.25, 29/256., (186-128)/256., (119-128)/256. }, + { 0.38, 119/256., (194-128)/256., (53-128)/256. }, + { 0.60, 111/256., (73-128)/256., (59-128)/256. }, + { 0.73, 205/256., (19-128)/256., (149-128)/256. }, + { 0.86, 135/256., (83-128)/256., (200-128)/256. }, + { 1, 73/256., (95-128)/256., (225-128)/256. }}, + [MORELAND] = { + { 0, 44/256., (181-128)/256., (112-128)/256. }, + { 0.13, 126/256., (177-128)/256., (106-128)/256. }, + { 0.25, 164/256., (163-128)/256., (109-128)/256. }, + { 0.38, 200/256., (140-128)/256., (120-128)/256. }, + { 0.60, 201/256., (117-128)/256., (141-128)/256. }, + { 0.73, 177/256., (103-128)/256., (165-128)/256. }, + { 0.86, 136/256., (100-128)/256., (183-128)/256. }, + { 1, 68/256., (117-128)/256., (203-128)/256. }}, + [NEBULAE] = { + { 0, 10/256., (134-128)/256., (132-128)/256. }, + { 0.23, 21/256., (137-128)/256., (130-128)/256. }, + { 0.45, 35/256., (134-128)/256., (134-128)/256. }, + { 0.57, 51/256., (130-128)/256., (139-128)/256. }, + { 0.67, 104/256., (116-128)/256., (162-128)/256. }, + { 0.77, 120/256., (105-128)/256., (188-128)/256. }, + { 0.87, 140/256., (105-128)/256., (188-128)/256. }, + { 1, 1, 0, 0 }}, + [FIRE] = { + { 0, 0, 0, 0 }, + { 0.23, 44/256., (132-128)/256., (127-128)/256. }, + { 0.45, 62/256., (116-128)/256., (140-128)/256. }, + { 0.57, 75/256., (105-128)/256., (152-128)/256. }, + { 0.67, 95/256., (91-128)/256., (166-128)/256. }, + { 0.77, 126/256., (74-128)/256., (172-128)/256. }, + { 0.87, 164/256., (73-128)/256., (162-128)/256. }, + { 1, 1, 0, 0 }}, + [FIERY] = { + { 0, 0, 0, 0 }, + { 0.23, 36/256., (116-128)/256., (163-128)/256. }, + { 0.45, 52/256., (102-128)/256., (200-128)/256. }, + { 0.57, 116/256., (84-128)/256., (196-128)/256. }, + { 0.67, 157/256., (67-128)/256., (181-128)/256. }, + { 0.77, 193/256., (40-128)/256., (155-128)/256. }, + { 0.87, 221/256., (101-128)/256., (134-128)/256. }, + { 1, 1, 0, 0 }}, + [FRUIT] = { + { 0, 0, 0, 0 }, + { 0.20, 29/256., (136-128)/256., (119-128)/256. }, + { 0.30, 60/256., (119-128)/256., (90-128)/256. }, + { 0.40, 85/256., (91-128)/256., (85-128)/256. }, + { 0.50, 116/256., (70-128)/256., (105-128)/256. }, + { 0.60, 151/256., (50-128)/256., (146-128)/256. }, + { 0.70, 191/256., (63-128)/256., (178-128)/256. }, + { 1, 98/256., (80-128)/256., (221-128)/256. }}, + [COOL] = { + { 0, 0, 0, 0 }, + { .15, 0, .5, -.5 }, + { 1, 1, -.5, .5 }}, +}; + +static av_cold void uninit(AVFilterContext *ctx) +{ + ShowSpectrumContext *s = ctx->priv; + int i; + + av_freep(&s->combine_buffer); + av_fft_end(s->fft); + if (s->fft_data) { + for (i = 0; i < s->nb_display_channels; i++) + av_freep(&s->fft_data[i]); + } + av_freep(&s->fft_data); + av_freep(&s->window_func_lut); + if (s->magnitudes) { + for (i = 0; i < s->nb_display_channels; i++) + av_freep(&s->magnitudes[i]); + } + av_freep(&s->magnitudes); + av_frame_free(&s->outpicref); + av_audio_fifo_free(s->fifo); + if (s->phases) { + for (i = 0; i < s->nb_display_channels; i++) + av_freep(&s->phases[i]); + } + av_freep(&s->phases); +} + +static int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats = NULL; + AVFilterChannelLayouts *layouts = NULL; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; + static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE }; + int ret; + + /* set input audio formats */ + formats = ff_make_format_list(sample_fmts); + if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0) + return ret; + + layouts = ff_all_channel_layouts(); + if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0) + return ret; + + formats = ff_all_samplerates(); + if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0) + return ret; + + /* set output video format */ + formats = ff_make_format_list(pix_fmts); + if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0) + return ret; + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + AVFilterLink *inlink = ctx->inputs[0]; + ShowSpectrumContext *s = ctx->priv; + int i, fft_bits, h, w; + float overlap; + + if (!strcmp(ctx->filter->name, "showspectrumpic")) + s->single_pic = 1; + + outlink->w = s->w; + outlink->h = s->h; + + if (s->legend) { + s->start_x = log10(inlink->sample_rate) * 25; + s->start_y = 64; + outlink->w += s->start_x * 2; + outlink->h += s->start_y * 2; + } + + h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->channels; + w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->channels; + s->channel_height = h; + s->channel_width = w; + + if (s->orientation == VERTICAL) { + /* FFT window size (precision) according to the requested output frame height */ + for (fft_bits = 1; 1 << fft_bits < 2 * h; fft_bits++); + } else { + /* FFT window size (precision) according to the requested output frame width */ + for (fft_bits = 1; 1 << fft_bits < 2 * w; fft_bits++); + } + s->win_size = 1 << fft_bits; + + /* (re-)configuration if the video output changed (or first init) */ + if (fft_bits != s->fft_bits) { + AVFrame *outpicref; + + av_fft_end(s->fft); + s->fft = av_fft_init(fft_bits, 0); + if (!s->fft) { + av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. " + "The window size might be too high.\n"); + return AVERROR(EINVAL); + } + s->fft_bits = fft_bits; + + /* FFT buffers: x2 for each (display) channel buffer. + * Note: we use free and malloc instead of a realloc-like function to + * make sure the buffer is aligned in memory for the FFT functions. */ + for (i = 0; i < s->nb_display_channels; i++) + av_freep(&s->fft_data[i]); + av_freep(&s->fft_data); + s->nb_display_channels = inlink->channels; + + s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes)); + if (!s->magnitudes) + return AVERROR(ENOMEM); + for (i = 0; i < s->nb_display_channels; i++) { + s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes)); + if (!s->magnitudes[i]) + return AVERROR(ENOMEM); + } + + s->phases = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes)); + if (!s->phases) + return AVERROR(ENOMEM); + for (i = 0; i < s->nb_display_channels; i++) { + s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases)); + if (!s->phases[i]) + return AVERROR(ENOMEM); + } + + s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data)); + if (!s->fft_data) + return AVERROR(ENOMEM); + for (i = 0; i < s->nb_display_channels; i++) { + s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data)); + if (!s->fft_data[i]) + return AVERROR(ENOMEM); + } + + /* pre-calc windowing function */ + s->window_func_lut = + av_realloc_f(s->window_func_lut, s->win_size, + sizeof(*s->window_func_lut)); + if (!s->window_func_lut) + return AVERROR(ENOMEM); + ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap); + if (s->overlap == 1) + s->overlap = overlap; + s->hop_size = (1. - s->overlap) * s->win_size; + if (s->hop_size < 1) { + av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap); + return AVERROR(EINVAL); + } + + for (s->win_scale = 0, i = 0; i < s->win_size; i++) { + s->win_scale += s->window_func_lut[i] * s->window_func_lut[i]; + } + s->win_scale = 1. / sqrt(s->win_scale); + + /* prepare the initial picref buffer (black frame) */ + av_frame_free(&s->outpicref); + s->outpicref = outpicref = + ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!outpicref) + return AVERROR(ENOMEM); + outlink->sample_aspect_ratio = (AVRational){1,1}; + for (i = 0; i < outlink->h; i++) { + memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w); + memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w); + memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w); + } + av_frame_set_color_range(outpicref, AVCOL_RANGE_JPEG); + } + + if ((s->orientation == VERTICAL && s->xpos >= s->w) || + (s->orientation == HORIZONTAL && s->xpos >= s->h)) + s->xpos = 0; + + outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap)); + if (s->orientation == VERTICAL && s->sliding == FULLFRAME) + outlink->frame_rate.den *= s->w; + if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME) + outlink->frame_rate.den *= s->h; + + if (s->orientation == VERTICAL) { + s->combine_buffer = + av_realloc_f(s->combine_buffer, s->h * 3, + sizeof(*s->combine_buffer)); + } else { + s->combine_buffer = + av_realloc_f(s->combine_buffer, s->w * 3, + sizeof(*s->combine_buffer)); + } + + av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n", + s->w, s->h, s->win_size); + + av_audio_fifo_free(s->fifo); + s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size); + if (!s->fifo) + return AVERROR(ENOMEM); + return 0; +} + +static void run_fft(ShowSpectrumContext *s, AVFrame *fin) +{ + int ch, n; + + /* fill FFT input with the number of samples available */ + for (ch = 0; ch < s->nb_display_channels; ch++) { + const float *p = (float *)fin->extended_data[ch]; + + for (n = 0; n < s->win_size; n++) { + s->fft_data[ch][n].re = p[n] * s->window_func_lut[n]; + s->fft_data[ch][n].im = 0; + } + } + + /* run FFT on each samples set */ + for (ch = 0; ch < s->nb_display_channels; ch++) { + av_fft_permute(s->fft, s->fft_data[ch]); + av_fft_calc(s->fft, s->fft_data[ch]); + } +} + +#define RE(y, ch) s->fft_data[ch][y].re +#define IM(y, ch) s->fft_data[ch][y].im +#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch)) +#define PHASE(y, ch) atan2(IM(y, ch), RE(y, ch)) + +static void calc_magnitudes(ShowSpectrumContext *s) +{ + const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1); + int ch, y, h = s->orientation == VERTICAL ? s->h : s->w; + const float f = s->gain * w; + + for (ch = 0; ch < s->nb_display_channels; ch++) { + float *magnitudes = s->magnitudes[ch]; + + for (y = 0; y < h; y++) + magnitudes[y] = MAGNITUDE(y, ch) * f; + } +} + +static void calc_phases(ShowSpectrumContext *s) +{ + int ch, y, h = s->orientation == VERTICAL ? s->h : s->w; + + for (ch = 0; ch < s->nb_display_channels; ch++) { + float *phases = s->phases[ch]; + + for (y = 0; y < h; y++) + phases[y] = (PHASE(y, ch) / M_PI + 1) / 2; + } +} + +static void acalc_magnitudes(ShowSpectrumContext *s) +{ + const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1); + int ch, y, h = s->orientation == VERTICAL ? s->h : s->w; + const float f = s->gain * w; + + for (ch = 0; ch < s->nb_display_channels; ch++) { + float *magnitudes = s->magnitudes[ch]; + + for (y = 0; y < h; y++) + magnitudes[y] += MAGNITUDE(y, ch) * f; + } +} + +static void scale_magnitudes(ShowSpectrumContext *s, float scale) +{ + int ch, y, h = s->orientation == VERTICAL ? s->h : s->w; + + for (ch = 0; ch < s->nb_display_channels; ch++) { + float *magnitudes = s->magnitudes[ch]; + + for (y = 0; y < h; y++) + magnitudes[y] *= scale; + } +} + +static void color_range(ShowSpectrumContext *s, int ch, + float *yf, float *uf, float *vf) +{ + switch (s->mode) { + case COMBINED: + // reduce range by channel count + *yf = 256.0f / s->nb_display_channels; + switch (s->color_mode) { + case RAINBOW: + case MORELAND: + case NEBULAE: + case FIRE: + case FIERY: + case FRUIT: + case COOL: + case INTENSITY: + *uf = *yf; + *vf = *yf; + break; + case CHANNEL: + /* adjust saturation for mixed UV coloring */ + /* this factor is correct for infinite channels, an approximation otherwise */ + *uf = *yf * M_PI; + *vf = *yf * M_PI; + break; + default: + av_assert0(0); + } + break; + case SEPARATE: + // full range + *yf = 256.0f; + *uf = 256.0f; + *vf = 256.0f; + break; + default: + av_assert0(0); + } + + if (s->color_mode == CHANNEL) { + if (s->nb_display_channels > 1) { + *uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels); + *vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels); + } else { + *uf = 0.0f; + *vf = 0.0f; + } + } + *uf *= s->saturation; + *vf *= s->saturation; +} + +static void pick_color(ShowSpectrumContext *s, + float yf, float uf, float vf, + float a, float *out) +{ + if (s->color_mode > CHANNEL) { + const int cm = s->color_mode; + float y, u, v; + int i; + + for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++) + if (color_table[cm][i].a >= a) + break; + // i now is the first item >= the color + // now we know to interpolate between item i - 1 and i + if (a <= color_table[cm][i - 1].a) { + y = color_table[cm][i - 1].y; + u = color_table[cm][i - 1].u; + v = color_table[cm][i - 1].v; + } else if (a >= color_table[cm][i].a) { + y = color_table[cm][i].y; + u = color_table[cm][i].u; + v = color_table[cm][i].v; + } else { + float start = color_table[cm][i - 1].a; + float end = color_table[cm][i].a; + float lerpfrac = (a - start) / (end - start); + y = color_table[cm][i - 1].y * (1.0f - lerpfrac) + + color_table[cm][i].y * lerpfrac; + u = color_table[cm][i - 1].u * (1.0f - lerpfrac) + + color_table[cm][i].u * lerpfrac; + v = color_table[cm][i - 1].v * (1.0f - lerpfrac) + + color_table[cm][i].v * lerpfrac; + } + + out[0] += y * yf; + out[1] += u * uf; + out[2] += v * vf; + } else { + out[0] += a * yf; + out[1] += a * uf; + out[2] += a * vf; + } +} + +static void clear_combine_buffer(ShowSpectrumContext *s, int size) +{ + int y; + + for (y = 0; y < size; y++) { + s->combine_buffer[3 * y ] = 0; + s->combine_buffer[3 * y + 1] = 127.5; + s->combine_buffer[3 * y + 2] = 127.5; + } +} + +static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples) +{ + int ret; + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + ShowSpectrumContext *s = ctx->priv; + AVFrame *outpicref = s->outpicref; + int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width; + + int ch, plane, x, y; + + /* fill a new spectrum column */ + /* initialize buffer for combining to black */ + clear_combine_buffer(s, s->orientation == VERTICAL ? s->h : s->w); + + for (ch = 0; ch < s->nb_display_channels; ch++) { + float *magnitudes = s->magnitudes[ch]; + float *phases = s->phases[ch]; + float yf, uf, vf; + + /* decide color range */ + color_range(s, ch, &yf, &uf, &vf); + + /* draw the channel */ + for (y = 0; y < h; y++) { + int row = (s->mode == COMBINED) ? y : ch * h + y; + float *out = &s->combine_buffer[3 * row]; + float a; + + switch (s->data) { + case D_MAGNITUDE: + /* get magnitude */ + a = magnitudes[y]; + break; + case D_PHASE: + /* get phase */ + a = phases[y]; + break; + default: + av_assert0(0); + } + + /* apply scale */ + switch (s->scale) { + case LINEAR: + a = av_clipf(a, 0, 1); + break; + case SQRT: + a = av_clipf(sqrt(a), 0, 1); + break; + case CBRT: + a = av_clipf(cbrt(a), 0, 1); + break; + case FOURTHRT: + a = av_clipf(sqrt(sqrt(a)), 0, 1); + break; + case FIFTHRT: + a = av_clipf(pow(a, 0.20), 0, 1); + break; + case LOG: + a = 1 + log10(av_clipd(a, 1e-6, 1)) / 6; // zero = -120dBFS + break; + default: + av_assert0(0); + } + + pick_color(s, yf, uf, vf, a, out); + } + } + + av_frame_make_writable(s->outpicref); + /* copy to output */ + if (s->orientation == VERTICAL) { + if (s->sliding == SCROLL) { + for (plane = 0; plane < 3; plane++) { + for (y = 0; y < s->h; y++) { + uint8_t *p = outpicref->data[plane] + + y * outpicref->linesize[plane]; + memmove(p, p + 1, s->w - 1); + } + } + s->xpos = s->w - 1; + } else if (s->sliding == RSCROLL) { + for (plane = 0; plane < 3; plane++) { + for (y = 0; y < s->h; y++) { + uint8_t *p = outpicref->data[plane] + + y * outpicref->linesize[plane]; + memmove(p + 1, p, s->w - 1); + } + } + s->xpos = 0; + } + for (plane = 0; plane < 3; plane++) { + uint8_t *p = outpicref->data[plane] + s->start_x + + (outlink->h - 1 - s->start_y) * outpicref->linesize[plane] + + s->xpos; + for (y = 0; y < s->h; y++) { + *p = lrintf(av_clipf(s->combine_buffer[3 * y + plane], 0, 255)); + p -= outpicref->linesize[plane]; + } + } + } else { + if (s->sliding == SCROLL) { + for (plane = 0; plane < 3; plane++) { + for (y = 1; y < s->h; y++) { + memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane], + outpicref->data[plane] + (y ) * outpicref->linesize[plane], + s->w); + } + } + s->xpos = s->h - 1; + } else if (s->sliding == RSCROLL) { + for (plane = 0; plane < 3; plane++) { + for (y = s->h - 1; y >= 1; y--) { + memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane], + outpicref->data[plane] + (y-1) * outpicref->linesize[plane], + s->w); + } + } + s->xpos = 0; + } + for (plane = 0; plane < 3; plane++) { + uint8_t *p = outpicref->data[plane] + s->start_x + + (s->xpos + s->start_y) * outpicref->linesize[plane]; + for (x = 0; x < s->w; x++) { + *p = lrintf(av_clipf(s->combine_buffer[3 * x + plane], 0, 255)); + p++; + } + } + } + + if (s->sliding != FULLFRAME || s->xpos == 0) + outpicref->pts = insamples->pts; + + s->xpos++; + if (s->orientation == VERTICAL && s->xpos >= s->w) + s->xpos = 0; + if (s->orientation == HORIZONTAL && s->xpos >= s->h) + s->xpos = 0; + if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) { + ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref)); + if (ret < 0) + return ret; + } + + return s->win_size; +} + +#if CONFIG_SHOWSPECTRUM_FILTER + +static int request_frame(AVFilterLink *outlink) +{ + ShowSpectrumContext *s = outlink->src->priv; + AVFilterLink *inlink = outlink->src->inputs[0]; + unsigned i; + int ret; + + ret = ff_request_frame(inlink); + if (ret == AVERROR_EOF && s->sliding == FULLFRAME && s->xpos > 0 && + s->outpicref) { + if (s->orientation == VERTICAL) { + for (i = 0; i < outlink->h; i++) { + memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos); + memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos); + memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos); + } + } else { + for (i = s->xpos; i < outlink->h; i++) { + memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w); + memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w); + memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w); + } + } + ret = ff_filter_frame(outlink, s->outpicref); + s->outpicref = NULL; + } + + return ret; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) +{ + AVFilterContext *ctx = inlink->dst; + ShowSpectrumContext *s = ctx->priv; + AVFrame *fin = NULL; + int ret = 0, consumed = 0; + + if (s->pts == AV_NOPTS_VALUE) + s->pts = insamples->pts - av_audio_fifo_size(s->fifo); + + av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples); + av_frame_free(&insamples); + while (av_audio_fifo_size(s->fifo) >= s->win_size) { + fin = ff_get_audio_buffer(inlink, s->win_size); + if (!fin) { + ret = AVERROR(ENOMEM); + goto fail; + } + + fin->pts = s->pts + consumed; + consumed += s->hop_size; + ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size); + if (ret < 0) + goto fail; + + av_assert0(fin->nb_samples == s->win_size); + + run_fft(s, fin); + if (s->data == D_MAGNITUDE) + calc_magnitudes(s); + if (s->data == D_PHASE) + calc_phases(s); + + ret = plot_spectrum_column(inlink, fin); + av_frame_free(&fin); + av_audio_fifo_drain(s->fifo, s->hop_size); + if (ret < 0) + goto fail; + } + +fail: + s->pts = AV_NOPTS_VALUE; + av_frame_free(&fin); + return ret; +} + +static const AVFilterPad showspectrum_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad showspectrum_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + .request_frame = request_frame, + }, + { NULL } +}; + +AVFilter ff_avf_showspectrum = { + .name = "showspectrum", + .description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."), + .uninit = uninit, + .query_formats = query_formats, + .priv_size = sizeof(ShowSpectrumContext), + .inputs = showspectrum_inputs, + .outputs = showspectrum_outputs, + .priv_class = &showspectrum_class, +}; +#endif // CONFIG_SHOWSPECTRUM_FILTER + +#if CONFIG_SHOWSPECTRUMPIC_FILTER + +static const AVOption showspectrumpic_options[] = { + { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS }, + { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS }, + { "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, "mode" }, + { "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" }, + { "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" }, + { "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, "color" }, + { "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" }, + { "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" }, + { "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" }, + { "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" }, + { "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" }, + { "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" }, + { "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" }, + { "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" }, + { "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" }, + { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" }, + { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" }, + { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" }, + { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" }, + { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" }, + { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" }, + { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" }, + { "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS }, + { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" }, + { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" }, + { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" }, + { "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, + { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, + { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" }, + { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" }, + { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" }, + { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" }, + { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" }, + { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" }, + { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" }, + { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" }, + { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" }, + { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" }, + { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" }, + { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" }, + { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" }, + { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" }, + { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" }, + { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS }, + { "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(showspectrumpic); + +static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o) +{ + const uint8_t *font; + int font_height; + int i; + + font = avpriv_cga_font, font_height = 8; + + for (i = 0; txt[i]; i++) { + int char_y, mask; + + if (o) { + for (char_y = font_height - 1; char_y >= 0; char_y--) { + uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x; + for (mask = 0x80; mask; mask >>= 1) { + if (font[txt[i] * font_height + font_height - 1 - char_y] & mask) + p[char_y] = ~p[char_y]; + p += pic->linesize[0]; + } + } + } else { + uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8); + for (char_y = 0; char_y < font_height; char_y++) { + for (mask = 0x80; mask; mask >>= 1) { + if (font[txt[i] * font_height + char_y] & mask) + *p = ~(*p); + p++; + } + p += pic->linesize[0] - 8; + } + } + } +} + +static int showspectrumpic_request_frame(AVFilterLink *outlink) +{ + ShowSpectrumContext *s = outlink->src->priv; + AVFilterLink *inlink = outlink->src->inputs[0]; + int ret; + + ret = ff_request_frame(inlink); + if (ret == AVERROR_EOF && s->outpicref) { + int samples = av_audio_fifo_size(s->fifo); + int consumed = 0; + int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h; + int ch, spf, spb; + AVFrame *fin; + + spf = s->win_size * (samples / ((s->win_size * sz) * ceil(samples / (float)(s->win_size * sz)))); + spb = (samples / (spf * sz)) * spf; + + fin = ff_get_audio_buffer(inlink, s->win_size); + if (!fin) + return AVERROR(ENOMEM); + + while (x < sz) { + ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size); + if (ret < 0) { + av_frame_free(&fin); + return ret; + } + + av_audio_fifo_drain(s->fifo, spf); + + if (ret < s->win_size) { + for (ch = 0; ch < s->nb_display_channels; ch++) { + memset(fin->extended_data[ch] + ret * sizeof(float), 0, + (s->win_size - ret) * sizeof(float)); + } + } + + run_fft(s, fin); + acalc_magnitudes(s); + + consumed += spf; + if (consumed >= spb) { + int h = s->orientation == VERTICAL ? s->h : s->w; + + scale_magnitudes(s, 1. / (consumed / spf)); + plot_spectrum_column(inlink, fin); + consumed = 0; + x++; + for (ch = 0; ch < s->nb_display_channels; ch++) + memset(s->magnitudes[ch], 0, h * sizeof(float)); + } + } + + av_frame_free(&fin); + s->outpicref->pts = 0; + + if (s->legend) { + int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL); + float spp = samples / (float)sz; + uint8_t *dst; + + drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0); + + dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1; + for (x = 0; x < s->w + 1; x++) + dst[x] = 200; + dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1; + for (x = 0; x < s->w + 1; x++) + dst[x] = 200; + for (y = 0; y < s->h + 2; y++) { + dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0]; + dst[s->start_x - 1] = 200; + dst[s->start_x + s->w] = 200; + } + if (s->orientation == VERTICAL) { + int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h; + for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) { + for (y = 0; y < h; y += 20) { + dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0]; + dst[s->start_x - 2] = 200; + dst[s->start_x + s->w + 1] = 200; + } + for (y = 0; y < h; y += 40) { + dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0]; + dst[s->start_x - 3] = 200; + dst[s->start_x + s->w + 2] = 200; + } + dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x; + for (x = 0; x < s->w; x+=40) + dst[x] = 200; + dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x; + for (x = 0; x < s->w; x+=80) + dst[x] = 200; + dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x; + for (x = 0; x < s->w; x+=40) { + dst[x] = 200; + } + dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x; + for (x = 0; x < s->w; x+=80) { + dst[x] = 200; + } + for (y = 0; y < h; y += 40) { + float hz = y * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(h))); + char *units; + + if (hz == 0) + units = av_asprintf("DC"); + else + units = av_asprintf("%.2f", hz); + if (!units) + return AVERROR(ENOMEM); + + drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4, units, 0); + av_free(units); + } + } + + for (x = 0; x < s->w; x+=80) { + float seconds = x * spp / inlink->sample_rate; + char *units; + + if (x == 0) + units = av_asprintf("0"); + else if (log10(seconds) > 6) + units = av_asprintf("%.2fh", seconds / (60 * 60)); + else if (log10(seconds) > 3) + units = av_asprintf("%.2fm", seconds / 60); + else + units = av_asprintf("%.2fs", seconds); + if (!units) + return AVERROR(ENOMEM); + + drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0); + drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0); + av_free(units); + } + + drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0); + drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1); + } else { + int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w; + for (y = 0; y < s->h; y += 20) { + dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0]; + dst[s->start_x - 2] = 200; + dst[s->start_x + s->w + 1] = 200; + } + for (y = 0; y < s->h; y += 40) { + dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0]; + dst[s->start_x - 3] = 200; + dst[s->start_x + s->w + 2] = 200; + } + for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) { + dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch; + for (x = 0; x < w; x+=40) + dst[x] = 200; + dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch; + for (x = 0; x < w; x+=80) + dst[x] = 200; + dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch; + for (x = 0; x < w; x+=40) { + dst[x] = 200; + } + dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch; + for (x = 0; x < w; x+=80) { + dst[x] = 200; + } + for (x = 0; x < w; x += 80) { + float hz = x * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(w))); + char *units; + + if (hz == 0) + units = av_asprintf("DC"); + else + units = av_asprintf("%.2f", hz); + if (!units) + return AVERROR(ENOMEM); + + drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0); + drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0); + av_free(units); + } + } + for (y = 0; y < s->h; y+=40) { + float seconds = y * spp / inlink->sample_rate; + char *units; + + if (x == 0) + units = av_asprintf("0"); + else if (log10(seconds) > 6) + units = av_asprintf("%.2fh", seconds / (60 * 60)); + else if (log10(seconds) > 3) + units = av_asprintf("%.2fm", seconds / 60); + else + units = av_asprintf("%.2fs", seconds); + if (!units) + return AVERROR(ENOMEM); + + drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0); + av_free(units); + } + drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1); + drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0); + } + + for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) { + int h = multi ? s->h / s->nb_display_channels : s->h; + + for (y = 0; y < h; y++) { + float out[3] = { 0., 127.5, 127.5}; + int chn; + + for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) { + float yf, uf, vf; + int channel = (multi) ? s->nb_display_channels - ch - 1 : chn; + + color_range(s, channel, &yf, &uf, &vf); + pick_color(s, yf, uf, vf, y / (float)h, out); + } + memset(s->outpicref->data[0]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0] + s->w + s->start_x + 20, av_clip_uint8(out[0]), 10); + memset(s->outpicref->data[1]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[1] + s->w + s->start_x + 20, av_clip_uint8(out[1]), 10); + memset(s->outpicref->data[2]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[2] + s->w + s->start_x + 20, av_clip_uint8(out[2]), 10); + } + } + } + + ret = ff_filter_frame(outlink, s->outpicref); + s->outpicref = NULL; + } + + return ret; +} + +static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples) +{ + AVFilterContext *ctx = inlink->dst; + ShowSpectrumContext *s = ctx->priv; + int ret; + + ret = av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples); + av_frame_free(&insamples); + return ret; +} + +static const AVFilterPad showspectrumpic_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = showspectrumpic_filter_frame, + }, + { NULL } +}; + +static const AVFilterPad showspectrumpic_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + .request_frame = showspectrumpic_request_frame, + }, + { NULL } +}; + +AVFilter ff_avf_showspectrumpic = { + .name = "showspectrumpic", + .description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."), + .uninit = uninit, + .query_formats = query_formats, + .priv_size = sizeof(ShowSpectrumContext), + .inputs = showspectrumpic_inputs, + .outputs = showspectrumpic_outputs, + .priv_class = &showspectrumpic_class, +}; + +#endif // CONFIG_SHOWSPECTRUMPIC_FILTER |