[FFmpeg-devel] [PATCH][BULK][again] new multimedia filter avf_showcqt.c
Muhammad Faiz
mfcc64 at gmail.com
Wed May 28 05:59:20 CEST 2014
Hi,
this filter is same as showspectrum but with constant Q transform,
so frequency is spaced logarithmically
-------------- next part --------------
diff -ruN a/libavfilter/allfilters.c b/libavfilter/allfilters.c
--- a/libavfilter/allfilters.c 2014-05-19 13:35:09.327627603 +0700
+++ b/libavfilter/allfilters.c 2014-05-19 11:07:44.977770955 +0700
@@ -233,6 +233,7 @@
REGISTER_FILTER(CONCAT, concat, avf);
REGISTER_FILTER(SHOWSPECTRUM, showspectrum, avf);
REGISTER_FILTER(SHOWWAVES, showwaves, avf);
+ REGISTER_FILTER(SHOWCQT, showcqt, avf);
/* multimedia sources */
REGISTER_FILTER(AMOVIE, amovie, avsrc);
diff -ruN a/libavfilter/avf_showcqt.c b/libavfilter/avf_showcqt.c
--- a/libavfilter/avf_showcqt.c 1970-01-01 07:00:00.000000000 +0700
+++ b/libavfilter/avf_showcqt.c 2014-05-28 10:41:20.000000000 +0700
@@ -0,0 +1,880 @@
+/*
+ * Copyright (c) 2014 Muhammad Faiz <mfcc64 at gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/avfft.h"
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "internal.h"
+
+#include <math.h>
+#include <stdlib.h>
+
+/* this filter is designed to do 16 bins/semitones constant Q transform with Brown-Puckette algorithm*/
+/* start from E0 to D#10 (10 octaves) */
+/* so there are 16 bins/semitones * 12 semitones/octaves * 10 octaves = 1920 bins */
+/* match with full HD resolution */
+
+#define VIDEO_WIDTH 1920
+#define VIDEO_HEIGHT 1080
+#define FONT_HEIGHT 24
+#define SPECTOGRAM_HEIGHT ((VIDEO_HEIGHT-FONT_HEIGHT)/2)
+#define SPECTOGRAM_START (VIDEO_HEIGHT-SPECTOGRAM_HEIGHT)
+#define BASE_FREQ 20.051392800492
+#define COEFF_CLAMP 1.0e-4
+
+/* image 'A BC D EF G ' from font 'Nimbus Mono L, Bold' */
+static uint8_t abcdefg_string[] = {
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+ 0x00, 0x01, 0x10, 0xAF, 0xFE, 0xD0, 0x3D, 0x1C, 0x18, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x14, 0xF5, 0xFE, 0xEC, 0x3C, 0x0E, 0x00, 0x00, 0x00, 0x15, 0xC4, 0xFF, 0xCB, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x48, 0xC2, 0xF7, 0xFE, 0xDD, 0xAA, 0x28, 0x00, 0x00, 0x4B, 0xB2, 0xE7, 0xFE, 0xFB, 0xBE, 0x3F,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x4E, 0xB6, 0xED, 0xFD, 0xDF, 0xBB, 0xB8, 0xB8, 0xB8, 0xC7, 0xED, 0xFD, 0xF7, 0x74, 0x01,
+ 0x00, 0x00, 0x2E, 0xF3, 0xFE, 0xFE, 0xC8, 0x7F, 0x69, 0x6F, 0x95, 0xE4, 0xFE, 0xFB, 0x4E, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x2A, 0xA8, 0xF3, 0xFD, 0xD9, 0xB8, 0xB8, 0xBF, 0xE0, 0xFE, 0xFE, 0xFF, 0x42, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x19, 0xA5, 0xDB, 0xFE, 0xEF, 0xBD, 0xB4, 0xB4, 0xB4, 0xB4, 0xBC, 0xE9, 0xFE, 0x85, 0x02,
+ 0x00, 0x23, 0x9E, 0xE4, 0xFE, 0xF0, 0xC1, 0xB8, 0xB0, 0x5C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0xAC, 0xFE, 0xFE, 0xE7, 0x9B, 0x70, 0x67, 0x76, 0xAB, 0xF9, 0xFF, 0xCB, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0xB6, 0xFF, 0xFE, 0xFE, 0xFF, 0xFF, 0x92, 0x00, 0x00, 0xB5, 0xFE, 0xFF, 0xFE, 0xFE, 0xFF, 0xA9,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x02, 0xB1, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xD5, 0x2C, 0x00,
+ 0x00, 0x00, 0x00, 0x97, 0xFD, 0xFE, 0xFE, 0xFB, 0xF3, 0xF6, 0xFE, 0xFE, 0xFE, 0xC9, 0x25, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x6A, 0xFC, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0x9F, 0x02, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x6E, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0x85, 0x02,
+ 0x00, 0x6E, 0xFC, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFE, 0xDF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x49, 0xE9, 0xFE, 0xFE, 0xFF, 0xF7, 0xF3, 0xFA, 0xFF, 0xFE, 0xFE, 0xCD, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0xC2, 0xFE, 0xFE, 0xFF, 0xFE, 0xFE, 0x9C, 0x00, 0x00, 0xBC, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xB2,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x03, 0xB8, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xE6, 0x54, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x1B, 0xA1, 0xF4, 0xFE, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xD6, 0x4C, 0x01, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x6D, 0xFC, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xF4, 0xA1, 0x1B, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x78, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x85, 0x02,
+ 0x00, 0x75, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xE6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x02, 0x5F, 0xE1, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFE, 0xFB, 0xD5, 0x45, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x57, 0xB2, 0xBF, 0xC0, 0xBF, 0xAF, 0x38, 0x00, 0x00, 0x56, 0xB4, 0xC0, 0xC0, 0xC0, 0xB9, 0x4E,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x57, 0xB5, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xB5, 0x93, 0x50, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x15, 0x72, 0xDB, 0xFF, 0xFF, 0xFF, 0xF1, 0xAB, 0x42, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x2F, 0xA5, 0xBF, 0xC0, 0xC0, 0xC0, 0xBF, 0xB9, 0x9D, 0x6E, 0x17, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x22, 0xAE, 0xBF, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0x64, 0x01,
+ 0x00, 0x27, 0xAA, 0xBF, 0xC0, 0xC0, 0xC0, 0xBF, 0xB7, 0x6D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x01, 0x48, 0xAA, 0xF0, 0xFF, 0xFF, 0xFF, 0xEB, 0x8B, 0x34, 0x01, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x05, 0x19, 0x20, 0x20, 0x20, 0x18, 0x00, 0x00, 0x00, 0x05, 0x1A, 0x20, 0x20, 0x20, 0x1C, 0x04,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x06, 0x1B, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x1B, 0x0A, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x2E, 0x50, 0x66, 0x5B, 0x3C, 0x15, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x03, 0x15, 0x20, 0x20, 0x20, 0x20, 0x20, 0x1D, 0x0F, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x17, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x11, 0x00,
+ 0x00, 0x02, 0x15, 0x20, 0x20, 0x20, 0x20, 0x20, 0x1C, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x15, 0x3C, 0x5A, 0x67, 0x57, 0x39, 0x09, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+
+typedef struct {
+ FFTSample value;
+ int index;
+} SparseCoeff;
+
+
+static double window_function(double x)
+{
+ double a0 = 0.355768;
+ double a1 = 0.487396/a0;
+ double a2 = 0.144232/a0;
+ double a3 = 0.012604/a0;
+ double c1, c2, c3, val;
+ if(fabs(x) >= 0.5)
+ return 0.0;
+ c1 = a1 * cos(2.0*M_PI*x);
+ c2 = a2 * cos(4.0*M_PI*x);
+ c3 = a3 * cos(6.0*M_PI*x);
+ val = 1.0 + c1 + c2 + c3;
+ return val;
+}
+
+static int qsort_sparsecoeff(const void *a, const void *b)
+{
+ const SparseCoeff *x = (SparseCoeff*) a;
+ const SparseCoeff *y = (SparseCoeff*) b;
+ if(fabsf(x->value) > fabsf(y->value))
+ return 1;
+ if(fabsf(x->value) < fabsf(y->value))
+ return -1;
+ if((x->index) > (y->index))
+ return 1;
+ return 0;
+}
+
+
+typedef struct {
+ const AVClass *class;
+ AVFrame *outpicref;
+ FFTContext *fft_context;
+ FFTComplex *fft_data;
+ FFTComplex *fft_result_left;
+ FFTComplex *fft_result_right;
+ SparseCoeff *coeff_sort;
+ SparseCoeff *coeffs[VIDEO_WIDTH];
+ int coeffs_len[VIDEO_WIDTH];
+ float color[VIDEO_WIDTH];
+ float alpha[FONT_HEIGHT][VIDEO_WIDTH];
+ uint8_t spectogram[SPECTOGRAM_HEIGHT][VIDEO_WIDTH][3];
+ int64_t frame_count;
+ int spectogram_count;
+ int spectogram_index;
+ int fft_bits;
+ int req_fullfilled;
+ int remaining_fill;
+ double volume;
+ double timeclamp; /* lower timeclamp, time-accurate, higher timeclamp, freq-accurate (at low freq)*/
+ float coeffclamp; /* lower coeffclamp, more precise, higher coeffclamp, faster */
+ float gamma; /* lower gamma, more contrast, higher gamma, more range */
+ int fps; /* the required fps is so strict, so it's enough to be int, but 24000/1001 etc cannot be encoded */
+ int count; /* fps * count = transform rate */
+} ShowCQTContext;
+
+#define OFFSET(x) offsetof(ShowCQTContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption showcqt_options[] = {
+ { "volume", "set volume", OFFSET(volume), AV_OPT_TYPE_DOUBLE, {.dbl = 16}, 0.1, 100, FLAGS },
+ { "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, {.dbl = 0.17 }, 0.1, 1.0, FLAGS},
+ { "coeffclamp", "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0.1, 10, FLAGS},
+ { "gamma", "set gamma", OFFSET(gamma), AV_OPT_TYPE_FLOAT, { .dbl = 3}, 1, 7, FLAGS },
+ { "fps", "set video fps", OFFSET(fps), AV_OPT_TYPE_INT, { .i64 = 25 }, 10, 100, FLAGS},
+ { "count", "set number of transform per frame", OFFSET(count), AV_OPT_TYPE_INT, { .i64 = 6 }, 1, 30, FLAGS},
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(showcqt);
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ int k;
+ ShowCQTContext *s = ctx->priv;
+ av_fft_end(s->fft_context);
+ s->fft_context = NULL;
+ for (k = 0; k < VIDEO_WIDTH; k++)
+ av_freep(&s->coeffs[k]);
+ av_freep(&s->fft_data);
+ av_freep(&s->fft_result_left);
+ av_freep(&s->fft_result_right);
+ av_freep(&s->coeff_sort);
+ av_frame_free(&s->outpicref);
+}
+
+
+
+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_FLT, AV_SAMPLE_FMT_NONE };
+ static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE };
+ static const int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1};
+ static const int samplerates[] = { 44100, 48000, -1};
+
+ /* set input audio formats */
+ formats = ff_make_format_list(sample_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+ ff_formats_ref(formats, &inlink->out_formats);
+
+ layouts = avfilter_make_format64_list(channel_layouts);
+ if (!layouts)
+ return AVERROR(ENOMEM);
+ ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts);
+
+ formats = ff_make_format_list(samplerates);
+ if (!formats)
+ return AVERROR(ENOMEM);
+ ff_formats_ref(formats, &inlink->out_samplerates);
+
+ /* set output video format */
+ formats = ff_make_format_list(pix_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+ ff_formats_ref(formats, &outlink->in_formats);
+
+ return 0;
+}
+
+
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ AVFilterLink *inlink = ctx->inputs[0];
+ ShowCQTContext *s = ctx->priv;
+ int fft_len, k, x, y;
+ int num_coeffs = 0;
+ int rate = inlink->sample_rate;
+ double max_len = rate * (double) s->timeclamp;
+ s->fft_bits = ceil(log2(max_len));
+ fft_len = 1 << s->fft_bits;
+
+ if((rate % (s->fps * s->count)))
+ {
+ av_log(ctx, AV_LOG_ERROR, "Rate (%u) is not divisible by fps*count (%u*%u)\n", rate, s->fps, s->count);
+ return AVERROR(EINVAL);
+ }
+
+ s->fft_data = av_malloc_array(sizeof(FFTComplex), fft_len);
+ if (!s->fft_data)
+ return AVERROR(ENOMEM);
+
+ s->coeff_sort = av_malloc_array(sizeof(SparseCoeff), fft_len);
+ if (!s->coeff_sort)
+ return AVERROR(ENOMEM);
+
+ s->fft_result_left = av_malloc_array(sizeof(FFTComplex), fft_len);
+ if (!s->fft_result_left)
+ return AVERROR(ENOMEM);
+
+ s->fft_result_right = av_malloc_array(sizeof(FFTComplex), fft_len);
+ if (!s->fft_result_right)
+ return AVERROR(ENOMEM);
+
+ s->fft_context = av_fft_init(s->fft_bits, 0);
+ if (!s->fft_context)
+ return AVERROR(ENOMEM);
+
+ /* initializing font */
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ if((x >= (12*3+8)*16) && (x < (12*4+8)*16))
+ {
+ float fx = (x - (12*3+8)*16) * (1.0f/192.0f);
+ float sv = sinf(M_PI*fx);
+ s->color[x] = sv*sv*255.0f;
+ }
+ else
+ s->color[x] = 0.0f;
+
+ for (y = 0; y < FONT_HEIGHT; y++)
+ {
+ int u = (x + 7*16) % (12*16);
+ s->alpha[y][x] = (1.0f/255.0f) * abcdefg_string[y*(12*16) + u];
+ }
+ }
+
+ av_log(ctx, AV_LOG_INFO, "Calculating spectral kernel, please wait\n");
+ for (k = 0; k < VIDEO_WIDTH; k++)
+ {
+ int x, hlen = fft_len >> 1;
+ float total = 0;
+ float partial = 0;
+ double freq = BASE_FREQ * exp2(k * (1.0/192.0));
+ double tlen = rate * (24.0 * 16.0) /freq;
+ tlen = tlen * max_len / (tlen + max_len);
+ s->fft_data[0].re = 0;
+ s->fft_data[0].im = 0;
+ s->fft_data[hlen].re = window_function(0) * (1.0/tlen) * s->volume * (1.0/fft_len);
+ s->fft_data[hlen].im = 0;
+ for (x = 1; x < hlen; x++)
+ {
+ double sv, cv, w;
+ sv = sin(2.0*M_PI*freq*x*(1.0/rate));
+ cv = cos(2.0*M_PI*freq*x*(1.0/rate));
+ w = window_function(x * (1.0/tlen)) * (1.0/tlen) * s->volume * (1.0/fft_len);
+ s->fft_data[hlen + x].re = w * cv;
+ s->fft_data[hlen + x].im = w * sv;
+ s->fft_data[hlen - x].re = s->fft_data[hlen + x].re;
+ s->fft_data[hlen - x].im = -s->fft_data[hlen + x].im;
+ }
+ av_fft_permute(s->fft_context, s->fft_data);
+ av_fft_calc(s->fft_context, s->fft_data);
+
+ for (x = 0; x < fft_len; x++)
+ {
+ s->coeff_sort[x].index = x;
+ s->coeff_sort[x].value = s->fft_data[x].re;
+ }
+
+ qsort(s->coeff_sort, fft_len, sizeof(SparseCoeff), qsort_sparsecoeff);
+ for (x = 0; x < fft_len; x++)
+ total += fabsf(s->coeff_sort[x].value);
+
+ for (x = 0; x < fft_len; x++)
+ {
+ partial += fabsf(s->coeff_sort[x].value);
+ if (partial > (total * s->coeffclamp * COEFF_CLAMP))
+ {
+ int y;
+ s->coeffs_len[k] = fft_len - x;
+ num_coeffs += s->coeffs_len[k];
+ s->coeffs[k] = av_malloc_array(sizeof(SparseCoeff), s->coeffs_len[k]);
+ if (!s->coeffs[k])
+ return AVERROR(ENOMEM);
+ for (y = 0; y < (s->coeffs_len[k]); y++)
+ {
+ s->coeffs[k][y] = s->coeff_sort[x+y];
+ }
+ break;
+ }
+ }
+ }
+
+ outlink->w = VIDEO_WIDTH;
+ outlink->h = VIDEO_HEIGHT;
+
+ s->req_fullfilled = 0;
+ s->spectogram_index = 0;
+ s->frame_count = 0;
+ s->spectogram_count = 0;
+ s->remaining_fill = fft_len >> 1;
+ memset(s->spectogram, 0, VIDEO_WIDTH*SPECTOGRAM_HEIGHT);
+ memset(s->fft_data, 0, fft_len * sizeof(FFTComplex));
+
+ s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!s->outpicref)
+ return AVERROR(ENOMEM);
+
+ outlink->sample_aspect_ratio = (AVRational){1,1};
+ outlink->time_base = (AVRational){ 1, s->fps };
+ outlink->frame_rate = (AVRational){s->fps, 1};
+
+ return 0;
+}
+
+
+
+static int plot_cqt(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ShowCQTContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ int fft_len = 1 << s->fft_bits;
+ FFTSample result[VIDEO_WIDTH][4];
+ int x, ret = 0;
+
+ /* real part contains left samples, imaginary part contains right samples */
+ memcpy(s->fft_result_left, s->fft_data, fft_len * sizeof(FFTComplex));
+ av_fft_permute(s->fft_context, s->fft_result_left);
+ av_fft_calc(s->fft_context, s->fft_result_left);
+
+ /* separate left and right, (and multiply by 2.0) */
+ s->fft_result_right[0].re = 2.0f * s->fft_result_left[0].im;
+ s->fft_result_right[0].im = 0;
+ s->fft_result_left[0].re = 2.0f * s->fft_result_left[0].re;
+ s->fft_result_left[0].im = 0;
+ for (x = 1; x <= (fft_len >> 1); x++)
+ {
+ FFTSample tmpy = (s->fft_result_left[fft_len-x].im - s->fft_result_left[x].im);
+
+ s->fft_result_right[x].re = (s->fft_result_left[x].im + s->fft_result_left[fft_len-x].im);
+ s->fft_result_right[x].im = (s->fft_result_left[x].re - s->fft_result_left[fft_len-x].re);
+ s->fft_result_right[fft_len-x].re = s->fft_result_right[x].re;
+ s->fft_result_right[fft_len-x].im = -s->fft_result_right[x].im;
+
+ s->fft_result_left[x].re = (s->fft_result_left[x].re + s->fft_result_left[fft_len-x].re);
+ s->fft_result_left[x].im = tmpy;
+ s->fft_result_left[fft_len-x].re = s->fft_result_left[x].re;
+ s->fft_result_left[fft_len-x].im = -s->fft_result_left[x].im;
+ }
+
+ /* calculating cqt */
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ int u;
+ float g = 1.0f / s->gamma;
+ FFTComplex l = {0,0};
+ FFTComplex r = {0,0};
+
+ for (u = 0; u < (s->coeffs_len[x]); u++)
+ {
+ FFTSample value = s->coeffs[x][u].value;
+ int index = s->coeffs[x][u].index;
+ l.re += value * s->fft_result_left[index].re;
+ l.im += value * s->fft_result_left[index].im;
+ r.re += value * s->fft_result_right[index].re;
+ r.im += value * s->fft_result_right[index].im;
+ }
+ /* result is power, not amplitude */
+ result[x][0] = l.re * l.re + l.im * l.im;
+ result[x][2] = r.re * r.re + r.im * r.im;
+ result[x][1] = 0.5f * (result[x][0] + result[x][2]);
+ result[x][3] = result[x][1];
+ result[x][0] = 255.0f * powf(fminf(1.0f,result[x][0]), g);
+ result[x][1] = 255.0f * powf(fminf(1.0f,result[x][1]), g);
+ result[x][2] = 255.0f * powf(fminf(1.0f,result[x][2]), g);
+ }
+
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ s->spectogram[s->spectogram_index][x][0] = result[x][0] + 0.5f;
+ s->spectogram[s->spectogram_index][x][1] = result[x][1] + 0.5f;
+ s->spectogram[s->spectogram_index][x][2] = result[x][2] + 0.5f;
+ }
+
+ /* drawing */
+ if (!s->spectogram_count)
+ {
+ uint8_t *data;
+ int y, x;
+ float rcp_result[VIDEO_WIDTH];
+
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ rcp_result[x] = 1.0f / (result[x][3]+0.0001f);
+ }
+
+ data = (uint8_t*) (s->outpicref->data[0]);
+
+ /* drawing bar */
+ for (y = 0; y < SPECTOGRAM_HEIGHT; y++)
+ {
+ float height = (SPECTOGRAM_HEIGHT - y) * (1.0f/SPECTOGRAM_HEIGHT);
+ uint8_t *lineptr = data + y * (s->outpicref->linesize[0]);
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ float mul;
+
+ if(result[x][3] <= height)
+ {
+ *lineptr++ = 0;
+ *lineptr++ = 0;
+ *lineptr++ = 0;
+ }
+ else
+ {
+ mul = (result[x][3] - height) * rcp_result[x];
+ *lineptr++ = mul * result[x][0] + 0.5f;
+ *lineptr++ = mul * result[x][1] + 0.5f;
+ *lineptr++ = mul * result[x][2] + 0.5f;
+ }
+ }
+
+ }
+
+ /* drawing font */
+ {
+ int x, y;
+ for (y = 0; y < FONT_HEIGHT; y++)
+ {
+ uint8_t *lineptr = data + (SPECTOGRAM_HEIGHT+y) * (s->outpicref->linesize[0]);
+ for (x = 0; x < VIDEO_WIDTH; x++)
+ {
+ *lineptr++ = ((255.0f - s->color[x]) * s->alpha[y][x] + result[x][0] * (1.0f - s->alpha[y][x])) + 0.5f;
+ *lineptr++ = result[x][1] * (1.0f - s->alpha[y][x]) + 0.5f;
+ *lineptr++ = (s->color[x] * s->alpha[y][x] + result[x][2] * (1.0f - s->alpha[y][x])) + 0.5f;
+ }
+ }
+ }
+
+ /* drawing spectogram/sonogram */
+ if (s->outpicref->linesize[0] == VIDEO_WIDTH*3)
+ {
+ int total_length = VIDEO_WIDTH * SPECTOGRAM_HEIGHT * 3;
+ int back_length = VIDEO_WIDTH * s->spectogram_index * 3;
+ data += SPECTOGRAM_START*VIDEO_WIDTH*3;
+ memcpy(data, s->spectogram[s->spectogram_index], total_length - back_length);
+ data += total_length - back_length;
+ if(back_length)
+ memcpy(data, s->spectogram[0], back_length);
+ }
+ else
+ {
+ for (y = 0; y < SPECTOGRAM_HEIGHT; y++)
+ {
+ uint8_t *lineptr = data + (SPECTOGRAM_START+y) * (s->outpicref->linesize[0]);
+ memcpy(lineptr, s->spectogram[(s->spectogram_index+y)%SPECTOGRAM_HEIGHT], VIDEO_WIDTH*3);
+ }
+ }
+
+ s->outpicref->pts = s->frame_count;
+ ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
+ s->req_fullfilled = 1;
+ s->frame_count++;
+ }
+ s->spectogram_count = (s->spectogram_count + 1) % s->count;
+ s->spectogram_index = (s->spectogram_index + SPECTOGRAM_HEIGHT - 1) % SPECTOGRAM_HEIGHT;
+ return ret;
+}
+
+
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ShowCQTContext *s = ctx->priv;
+ int step = inlink->sample_rate / (s->fps * s->count);
+ int fft_len = 1 << s->fft_bits;
+ int remaining;
+ float *audio_data;
+
+ if (!insamples)
+ {
+ while ((s->remaining_fill) < (fft_len >> 1))
+ {
+ int ret, x;
+ memset(&s->fft_data[fft_len - s->remaining_fill], 0, sizeof(FFTComplex) * s->remaining_fill);
+ ret = plot_cqt(inlink);
+ if (ret < 0)
+ return ret;
+ for (x = 0; x < (fft_len-step); x++)
+ s->fft_data[x] = s->fft_data[x+step];
+ s->remaining_fill += step;
+ }
+ return AVERROR(EOF);
+ }
+
+ remaining = insamples->nb_samples;
+ audio_data = (float*) insamples->data[0];
+
+ while (remaining)
+ {
+ if (remaining >= s->remaining_fill)
+ {
+ int i = insamples->nb_samples - remaining;
+ int j = fft_len - s->remaining_fill;
+ int m, ret;
+ for (m = 0; m < s->remaining_fill; m++)
+ {
+ s->fft_data[j+m].re = audio_data[2*(i+m)];
+ s->fft_data[j+m].im = audio_data[2*(i+m)+1];
+ }
+ ret = plot_cqt(inlink);
+ if (ret < 0)
+ {
+ av_frame_free(&insamples);
+ return ret;
+ }
+ remaining -= s->remaining_fill;
+ for (m = 0; m < (fft_len-step); m++)
+ s->fft_data[m] = s->fft_data[m+step];
+ s->remaining_fill = step;
+ }
+ else
+ {
+ int i = insamples->nb_samples - remaining;
+ int j = fft_len - s->remaining_fill;
+ int m;
+ for (m = 0; m < remaining; m++)
+ {
+ s->fft_data[m+j].re = audio_data[2*(i+m)];
+ s->fft_data[m+j].im = audio_data[2*(i+m)+1];
+ }
+ s->remaining_fill -= remaining;
+ remaining = 0;
+ }
+ }
+ av_frame_free(&insamples);
+ return 0;
+}
+
+
+
+static int request_frame(AVFilterLink *outlink)
+{
+ ShowCQTContext *s = outlink->src->priv;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ int ret;
+
+ s->req_fullfilled = 0;
+ do {
+ ret = ff_request_frame(inlink);
+ } while (!s->req_fullfilled && ret >= 0);
+
+ if (ret == AVERROR_EOF && s->outpicref)
+ filter_frame(inlink, NULL);
+ return ret;
+}
+
+
+
+static const AVFilterPad showcqt_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad showcqt_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_avf_showcqt = {
+ .name = "showcqt",
+ .description = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant Q Transform) spectrum video output."),
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .priv_size = sizeof(ShowCQTContext),
+ .inputs = showcqt_inputs,
+ .outputs = showcqt_outputs,
+ .priv_class = &showcqt_class,
+};
diff -ruN a/libavfilter/Makefile b/libavfilter/Makefile
--- a/libavfilter/Makefile 2014-05-19 13:35:09.329627630 +0700
+++ b/libavfilter/Makefile 2014-05-19 11:06:27.353131460 +0700
@@ -226,6 +226,7 @@
OBJS-$(CONFIG_CONCAT_FILTER) += avf_concat.o
OBJS-$(CONFIG_SHOWSPECTRUM_FILTER) += avf_showspectrum.o
OBJS-$(CONFIG_SHOWWAVES_FILTER) += avf_showwaves.o
+OBJS-$(CONFIG_SHOWCQT_FILTER) += avf_showcqt.o
# multimedia sources
OBJS-$(CONFIG_AMOVIE_FILTER) += src_movie.o
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