mirror of https://github.com/FFmpeg/FFmpeg.git
this filter is the same as showspectrum but with constant Q transform, so frequency is spaced logarithmicallypull/76/merge
Muhammad Faiz
11 years ago
committed by
Michael Niedermayer
parent
da53de0730
commit
40e938a7ed
7 changed files with 660 additions and 1 deletions
@ -0,0 +1,585 @@ |
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/*
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* Copyright (c) 2014 Muhammad Faiz <mfcc64@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavcodec/avfft.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/xga_font_data.h" |
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#include "libavutil/qsort.h" |
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#include "libavutil/time.h" |
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#include "avfilter.h" |
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#include "internal.h" |
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#include <math.h> |
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#include <stdlib.h> |
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/* this filter is designed to do 16 bins/semitones constant Q transform with Brown-Puckette algorithm
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* start from E0 to D#10 (10 octaves) |
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* so there are 16 bins/semitones * 12 semitones/octaves * 10 octaves = 1920 bins |
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* match with full HD resolution */ |
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#define VIDEO_WIDTH 1920 |
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#define VIDEO_HEIGHT 1080 |
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#define FONT_HEIGHT 32 |
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#define SPECTOGRAM_HEIGHT ((VIDEO_HEIGHT-FONT_HEIGHT)/2) |
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#define SPECTOGRAM_START (VIDEO_HEIGHT-SPECTOGRAM_HEIGHT) |
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#define BASE_FREQ 20.051392800492 |
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#define COEFF_CLAMP 1.0e-4 |
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typedef struct { |
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FFTSample value; |
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int index; |
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} SparseCoeff; |
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static inline int qsort_sparsecoeff(const SparseCoeff *a, const SparseCoeff *b) |
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{ |
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if (fabsf(a->value) >= fabsf(b->value)) |
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return 1; |
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else |
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return -1; |
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} |
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typedef struct { |
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const AVClass *class; |
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AVFrame *outpicref; |
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FFTContext *fft_context; |
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FFTComplex *fft_data; |
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FFTComplex *fft_result_left; |
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FFTComplex *fft_result_right; |
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SparseCoeff *coeff_sort; |
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SparseCoeff *coeffs[VIDEO_WIDTH]; |
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int coeffs_len[VIDEO_WIDTH]; |
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uint8_t font_color[VIDEO_WIDTH]; |
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uint8_t spectogram[SPECTOGRAM_HEIGHT][VIDEO_WIDTH][3]; |
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int64_t frame_count; |
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int spectogram_count; |
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int spectogram_index; |
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int fft_bits; |
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int req_fullfilled; |
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int remaining_fill; |
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double volume; |
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double timeclamp; /* lower timeclamp, time-accurate, higher timeclamp, freq-accurate (at low freq)*/ |
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float coeffclamp; /* lower coeffclamp, more precise, higher coeffclamp, faster */ |
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float gamma; /* lower gamma, more contrast, higher gamma, more range */ |
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int fps; /* the required fps is so strict, so it's enough to be int, but 24000/1001 etc cannot be encoded */ |
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int count; /* fps * count = transform rate */ |
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} ShowCQTContext; |
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#define OFFSET(x) offsetof(ShowCQTContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption showcqt_options[] = { |
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{ "volume", "set volume", OFFSET(volume), AV_OPT_TYPE_DOUBLE, { .dbl = 16 }, 0.1, 100, FLAGS }, |
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{ "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS }, |
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{ "coeffclamp", "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, 0.1, 10, FLAGS }, |
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{ "gamma", "set gamma", OFFSET(gamma), AV_OPT_TYPE_FLOAT, { .dbl = 3 }, 1, 7, FLAGS }, |
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{ "fps", "set video fps", OFFSET(fps), AV_OPT_TYPE_INT, { .i64 = 25 }, 10, 100, FLAGS }, |
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{ "count", "set number of transform per frame", OFFSET(count), AV_OPT_TYPE_INT, { .i64 = 6 }, 1, 30, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(showcqt); |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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int k; |
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ShowCQTContext *s = ctx->priv; |
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av_fft_end(s->fft_context); |
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s->fft_context = NULL; |
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for (k = 0; k < VIDEO_WIDTH; k++) |
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av_freep(&s->coeffs[k]); |
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av_freep(&s->fft_data); |
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av_freep(&s->fft_result_left); |
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av_freep(&s->fft_result_right); |
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av_freep(&s->coeff_sort); |
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av_frame_free(&s->outpicref); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *formats = NULL; |
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AVFilterChannelLayouts *layouts = NULL; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE }; |
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE }; |
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static const int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 }; |
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static const int samplerates[] = { 44100, 48000, -1 }; |
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/* set input audio formats */ |
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formats = ff_make_format_list(sample_fmts); |
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if (!formats) |
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return AVERROR(ENOMEM); |
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ff_formats_ref(formats, &inlink->out_formats); |
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layouts = avfilter_make_format64_list(channel_layouts); |
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if (!layouts) |
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return AVERROR(ENOMEM); |
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ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts); |
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formats = ff_make_format_list(samplerates); |
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if (!formats) |
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return AVERROR(ENOMEM); |
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ff_formats_ref(formats, &inlink->out_samplerates); |
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/* set output video format */ |
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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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ff_formats_ref(formats, &outlink->in_formats); |
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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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AVFilterLink *inlink = ctx->inputs[0]; |
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ShowCQTContext *s = ctx->priv; |
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int fft_len, k, x, y; |
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int num_coeffs = 0; |
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int rate = inlink->sample_rate; |
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double max_len = rate * (double) s->timeclamp; |
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int64_t start_time, end_time; |
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s->fft_bits = ceil(log2(max_len)); |
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fft_len = 1 << s->fft_bits; |
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if (rate % (s->fps * s->count)) |
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{ |
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av_log(ctx, AV_LOG_ERROR, "Rate (%u) is not divisible by fps*count (%u*%u)\n", rate, s->fps, s->count); |
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return AVERROR(EINVAL); |
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} |
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s->fft_data = av_malloc_array(fft_len, sizeof(*s->fft_data)); |
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s->coeff_sort = av_malloc_array(fft_len, sizeof(*s->coeff_sort)); |
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s->fft_result_left = av_malloc_array(fft_len, sizeof(*s->fft_result_left)); |
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s->fft_result_right = av_malloc_array(fft_len, sizeof(*s->fft_result_right)); |
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s->fft_context = av_fft_init(s->fft_bits, 0); |
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if (!s->fft_data || !s->coeff_sort || !s->fft_result_left || !s->fft_result_right || !s->fft_context) |
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return AVERROR(ENOMEM); |
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/* initializing font */ |
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for (x = 0; x < VIDEO_WIDTH; x++) |
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{ |
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if (x >= (12*3+8)*16 && x < (12*4+8)*16) |
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{ |
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float fx = (x-(12*3+8)*16) * (1.0f/192.0f); |
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float sv = sinf(M_PI*fx); |
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s->font_color[x] = sv*sv*255.0f + 0.5f; |
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} |
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else |
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s->font_color[x] = 0; |
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} |
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av_log(ctx, AV_LOG_INFO, "Calculating spectral kernel, please wait\n"); |
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start_time = av_gettime_relative(); |
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for (k = 0; k < VIDEO_WIDTH; k++) |
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{ |
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int hlen = fft_len >> 1; |
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float total = 0; |
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float partial = 0; |
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double freq = BASE_FREQ * exp2(k * (1.0/192.0)); |
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double tlen = rate * (24.0 * 16.0) /freq; |
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/* a window function from Albert H. Nuttall,
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* "Some Windows with Very Good Sidelobe Behavior" |
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* -93.32 dB peak sidelobe and 18 dB/octave asymptotic decay |
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* coefficient normalized to a0 = 1 */ |
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double a0 = 0.355768; |
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double a1 = 0.487396/a0; |
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double a2 = 0.144232/a0; |
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double a3 = 0.012604/a0; |
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double sv_step, cv_step, sv, cv; |
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double sw_step, cw_step, sw, cw, w; |
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tlen = tlen * max_len / (tlen + max_len); |
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s->fft_data[0].re = 0; |
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s->fft_data[0].im = 0; |
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s->fft_data[hlen].re = (1.0 + a1 + a2 + a3) * (1.0/tlen) * s->volume * (1.0/fft_len); |
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s->fft_data[hlen].im = 0; |
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sv_step = sv = sin(2.0*M_PI*freq*(1.0/rate)); |
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cv_step = cv = cos(2.0*M_PI*freq*(1.0/rate)); |
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/* also optimizing window func */ |
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sw_step = sw = sin(2.0*M_PI*(1.0/tlen)); |
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cw_step = cw = cos(2.0*M_PI*(1.0/tlen)); |
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for (x = 1; x < 0.5 * tlen; x++) |
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{ |
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double cv_tmp, cw_tmp; |
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double cw2, cw3, sw2; |
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cw2 = cw * cw - sw * sw; |
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sw2 = cw * sw + sw * cw; |
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cw3 = cw * cw2 - sw * sw2; |
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w = (1.0 + a1 * cw + a2 * cw2 + a3 * cw3) * (1.0/tlen) * s->volume * (1.0/fft_len); |
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s->fft_data[hlen + x].re = w * cv; |
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s->fft_data[hlen + x].im = w * sv; |
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s->fft_data[hlen - x].re = s->fft_data[hlen + x].re; |
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s->fft_data[hlen - x].im = -s->fft_data[hlen + x].im; |
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cv_tmp = cv * cv_step - sv * sv_step; |
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sv = sv * cv_step + cv * sv_step; |
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cv = cv_tmp; |
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cw_tmp = cw * cw_step - sw * sw_step; |
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sw = sw * cw_step + cw * sw_step; |
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cw = cw_tmp; |
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} |
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for (; x < hlen; x++) |
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{ |
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s->fft_data[hlen + x].re = 0; |
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s->fft_data[hlen + x].im = 0; |
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s->fft_data[hlen - x].re = 0; |
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s->fft_data[hlen - x].im = 0; |
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} |
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av_fft_permute(s->fft_context, s->fft_data); |
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av_fft_calc(s->fft_context, s->fft_data); |
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for (x = 0; x < fft_len; x++) |
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{ |
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s->coeff_sort[x].index = x; |
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s->coeff_sort[x].value = s->fft_data[x].re; |
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} |
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AV_QSORT(s->coeff_sort, fft_len, SparseCoeff, qsort_sparsecoeff); |
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for (x = 0; x < fft_len; x++) |
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total += fabsf(s->coeff_sort[x].value); |
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for (x = 0; x < fft_len; x++) |
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{ |
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partial += fabsf(s->coeff_sort[x].value); |
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if (partial > (total * s->coeffclamp * COEFF_CLAMP)) |
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{ |
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s->coeffs_len[k] = fft_len - x; |
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num_coeffs += s->coeffs_len[k]; |
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s->coeffs[k] = av_malloc_array(s->coeffs_len[k], sizeof(*s->coeffs[k])); |
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if (!s->coeffs[k]) |
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return AVERROR(ENOMEM); |
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for (y = 0; y < s->coeffs_len[k]; y++) |
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s->coeffs[k][y] = s->coeff_sort[x+y]; |
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break; |
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} |
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} |
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} |
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end_time = av_gettime_relative(); |
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av_log(ctx, AV_LOG_INFO, "Elapsed time %.6f s (fft_len=%u, num_coeffs=%u)\n", 1e-6 * (end_time-start_time), fft_len, num_coeffs); |
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outlink->w = VIDEO_WIDTH; |
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outlink->h = VIDEO_HEIGHT; |
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s->req_fullfilled = 0; |
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s->spectogram_index = 0; |
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s->frame_count = 0; |
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s->spectogram_count = 0; |
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s->remaining_fill = fft_len >> 1; |
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memset(s->spectogram, 0, VIDEO_WIDTH * SPECTOGRAM_HEIGHT * 3); |
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memset(s->fft_data, 0, fft_len * sizeof(*s->fft_data)); |
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s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!s->outpicref) |
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return AVERROR(ENOMEM); |
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outlink->sample_aspect_ratio = av_make_q(1, 1); |
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outlink->time_base = av_make_q(1, s->fps); |
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outlink->frame_rate = av_make_q(s->fps, 1); |
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return 0; |
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} |
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static int plot_cqt(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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ShowCQTContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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int fft_len = 1 << s->fft_bits; |
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FFTSample result[VIDEO_WIDTH][4]; |
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int x, y, ret = 0; |
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/* real part contains left samples, imaginary part contains right samples */ |
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memcpy(s->fft_result_left, s->fft_data, fft_len * sizeof(*s->fft_data)); |
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av_fft_permute(s->fft_context, s->fft_result_left); |
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av_fft_calc(s->fft_context, s->fft_result_left); |
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/* separate left and right, (and multiply by 2.0) */ |
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s->fft_result_right[0].re = 2.0f * s->fft_result_left[0].im; |
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s->fft_result_right[0].im = 0; |
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s->fft_result_left[0].re = 2.0f * s->fft_result_left[0].re; |
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s->fft_result_left[0].im = 0; |
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for (x = 1; x <= (fft_len >> 1); x++) |
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{ |
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FFTSample tmpy = s->fft_result_left[fft_len-x].im - s->fft_result_left[x].im; |
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s->fft_result_right[x].re = s->fft_result_left[x].im + s->fft_result_left[fft_len-x].im; |
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s->fft_result_right[x].im = s->fft_result_left[x].re - s->fft_result_left[fft_len-x].re; |
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s->fft_result_right[fft_len-x].re = s->fft_result_right[x].re; |
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s->fft_result_right[fft_len-x].im = -s->fft_result_right[x].im; |
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s->fft_result_left[x].re = s->fft_result_left[x].re + s->fft_result_left[fft_len-x].re; |
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s->fft_result_left[x].im = tmpy; |
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s->fft_result_left[fft_len-x].re = s->fft_result_left[x].re; |
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s->fft_result_left[fft_len-x].im = -s->fft_result_left[x].im; |
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} |
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/* calculating cqt */ |
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for (x = 0; x < VIDEO_WIDTH; x++) |
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{ |
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int u; |
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float g = 1.0f / s->gamma; |
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FFTComplex l = {0,0}; |
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FFTComplex r = {0,0}; |
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for (u = 0; u < s->coeffs_len[x]; u++) |
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{ |
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FFTSample value = s->coeffs[x][u].value; |
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int index = s->coeffs[x][u].index; |
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l.re += value * s->fft_result_left[index].re; |
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l.im += value * s->fft_result_left[index].im; |
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r.re += value * s->fft_result_right[index].re; |
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r.im += value * s->fft_result_right[index].im; |
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} |
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/* result is power, not amplitude */ |
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result[x][0] = l.re * l.re + l.im * l.im; |
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result[x][2] = r.re * r.re + r.im * r.im; |
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result[x][1] = 0.5f * (result[x][0] + result[x][2]); |
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result[x][3] = result[x][1]; |
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result[x][0] = 255.0f * powf(fminf(1.0f,result[x][0]), g); |
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result[x][1] = 255.0f * powf(fminf(1.0f,result[x][1]), g); |
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result[x][2] = 255.0f * powf(fminf(1.0f,result[x][2]), g); |
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} |
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for (x = 0; x < VIDEO_WIDTH; x++) |
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{ |
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s->spectogram[s->spectogram_index][x][0] = result[x][0] + 0.5f; |
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s->spectogram[s->spectogram_index][x][1] = result[x][1] + 0.5f; |
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s->spectogram[s->spectogram_index][x][2] = result[x][2] + 0.5f; |
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} |
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/* drawing */ |
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if (!s->spectogram_count) |
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{ |
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uint8_t *data = (uint8_t*) s->outpicref->data[0]; |
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int linesize = s->outpicref->linesize[0]; |
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float rcp_result[VIDEO_WIDTH]; |
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for (x = 0; x < VIDEO_WIDTH; x++) |
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rcp_result[x] = 1.0f / (result[x][3]+0.0001f); |
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/* drawing bar */ |
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for (y = 0; y < SPECTOGRAM_HEIGHT; y++) |
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{ |
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float height = (SPECTOGRAM_HEIGHT - y) * (1.0f/SPECTOGRAM_HEIGHT); |
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uint8_t *lineptr = data + y * linesize; |
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for (x = 0; x < VIDEO_WIDTH; x++) |
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{ |
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float mul; |
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if (result[x][3] <= height) |
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{ |
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*lineptr++ = 0; |
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*lineptr++ = 0; |
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*lineptr++ = 0; |
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} |
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else |
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{ |
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mul = (result[x][3] - height) * rcp_result[x]; |
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*lineptr++ = mul * result[x][0] + 0.5f; |
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*lineptr++ = mul * result[x][1] + 0.5f; |
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*lineptr++ = mul * result[x][2] + 0.5f; |
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} |
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} |
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} |
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/* drawing font */ |
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for (y = 0; y < FONT_HEIGHT; y++) |
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{ |
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uint8_t *lineptr = data + (SPECTOGRAM_HEIGHT + y) * linesize; |
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memcpy(lineptr, s->spectogram[s->spectogram_index], VIDEO_WIDTH*3); |
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} |
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for (x = 0; x < VIDEO_WIDTH; x += VIDEO_WIDTH/10) |
||||
{ |
||||
int u; |
||||
static const char str[] = "EF G A BC D "; |
||||
uint8_t *startptr = data + SPECTOGRAM_HEIGHT * linesize + x * 3; |
||||
for (u = 0; str[u]; u++) |
||||
{ |
||||
int v; |
||||
for (v = 0; v < 16; v++) |
||||
{ |
||||
uint8_t *p = startptr + 2 * v * linesize + 16 * 3 * u; |
||||
int ux = x + 16 * u; |
||||
int mask; |
||||
for (mask = 0x80; mask; mask >>= 1) |
||||
{ |
||||
if (mask & avpriv_vga16_font[str[u] * 16 + v]) |
||||
{ |
||||
p[0] = p[linesize] = 255 - s->font_color[ux]; |
||||
p[1] = p[linesize+1] = 0; |
||||
p[2] = p[linesize+2] = s->font_color[ux]; |
||||
p[3] = p[linesize+3] = 255 - s->font_color[ux+1]; |
||||
p[4] = p[linesize+4] = 0; |
||||
p[5] = p[linesize+5] = s->font_color[ux+1]; |
||||
} |
||||
p += 6; |
||||
ux += 2; |
||||
} |
||||
} |
||||
} |
||||
|
||||
} |
||||
|
||||
/* drawing spectogram/sonogram */ |
||||
if (linesize == 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++) |
||||
memcpy(data + (SPECTOGRAM_START + y) * linesize, 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(*s->fft_data) * 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, |
||||
}; |
||||
Loading…
Reference in new issue