mirror of
https://git.videolan.org/git/ffmpeg.git
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355 lines
11 KiB
C
355 lines
11 KiB
C
/*
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* Copyright (c) 2013 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* audio to video multimedia vectorscope filter
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*/
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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/parseutils.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "audio.h"
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#include "video.h"
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#include "internal.h"
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enum VectorScopeMode {
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LISSAJOUS,
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LISSAJOUS_XY,
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POLAR,
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MODE_NB,
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};
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enum VectorScopeDraw {
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DOT,
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LINE,
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DRAW_NB,
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};
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enum VectorScopeScale {
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LIN,
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SQRT,
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CBRT,
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LOG,
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SCALE_NB,
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};
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typedef struct AudioVectorScopeContext {
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const AVClass *class;
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AVFrame *outpicref;
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int w, h;
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int hw, hh;
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int mode;
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int draw;
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int scale;
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int contrast[4];
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int fade[4];
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double zoom;
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unsigned prev_x, prev_y;
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AVRational frame_rate;
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} AudioVectorScopeContext;
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#define OFFSET(x) offsetof(AudioVectorScopeContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption avectorscope_options[] = {
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{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
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{ "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
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{ "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" },
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{ "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
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{ "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" },
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
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{ "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS },
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{ "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
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{ "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS },
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{ "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
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{ "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
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{ "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
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{ "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
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{ "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
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{ "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 10, FLAGS },
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{ "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" },
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{ "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" },
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{ "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" },
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{ "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, FLAGS, "scale" },
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, FLAGS, "scale" },
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{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
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{ "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
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{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(avectorscope);
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static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
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{
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const int linesize = s->outpicref->linesize[0];
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uint8_t *dst;
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if (s->zoom > 1) {
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if (y >= s->h || x >= s->w)
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return;
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} else {
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y = FFMIN(y, s->h - 1);
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x = FFMIN(x, s->w - 1);
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}
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dst = &s->outpicref->data[0][y * linesize + x * 4];
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dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
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dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
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dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
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dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
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}
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static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
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{
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int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
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int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
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int err = (dx>dy ? dx : -dy) / 2, e2;
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for (;;) {
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draw_dot(s, x0, y0);
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if (x0 == x1 && y0 == y1)
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break;
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e2 = err;
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if (e2 >-dx) {
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err -= dy;
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x0 += sx;
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}
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if (e2 < dy) {
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err += dx;
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y0 += sy;
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}
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}
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}
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static void fade(AudioVectorScopeContext *s)
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{
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const int linesize = s->outpicref->linesize[0];
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int i, j;
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if (s->fade[0] || s->fade[1] || s->fade[2]) {
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uint8_t *d = s->outpicref->data[0];
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for (i = 0; i < s->h; i++) {
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for (j = 0; j < s->w*4; j+=4) {
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d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
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d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
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d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
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d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
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}
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d += linesize;
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}
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}
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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 *layout = 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_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
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int ret;
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 ||
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(ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
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(ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0)
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return ret;
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formats = ff_all_samplerates();
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if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
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return ret;
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formats = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
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return ret;
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return 0;
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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AudioVectorScopeContext *s = ctx->priv;
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int nb_samples;
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nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
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inlink->partial_buf_size =
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inlink->min_samples =
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inlink->max_samples = nb_samples;
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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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AudioVectorScopeContext *s = outlink->src->priv;
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outlink->w = s->w;
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outlink->h = s->h;
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outlink->sample_aspect_ratio = (AVRational){1,1};
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outlink->frame_rate = s->frame_rate;
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s->prev_x = s->hw = s->w / 2;
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s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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AudioVectorScopeContext *s = ctx->priv;
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const int hw = s->hw;
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const int hh = s->hh;
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unsigned x, y;
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unsigned prev_x = s->prev_x, prev_y = s->prev_y;
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const double zoom = s->zoom;
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int i;
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if (!s->outpicref || s->outpicref->width != outlink->w ||
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s->outpicref->height != outlink->h) {
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av_frame_free(&s->outpicref);
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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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av_frame_free(&insamples);
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < outlink->h; i++)
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memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
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}
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s->outpicref->pts = insamples->pts;
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fade(s);
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for (i = 0; i < insamples->nb_samples; i++) {
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int16_t *samples = (int16_t *)insamples->data[0] + i * 2;
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float *samplesf = (float *)insamples->data[0] + i * 2;
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float src[2];
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switch (insamples->format) {
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case AV_SAMPLE_FMT_S16:
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src[0] = samples[0] / (float)INT16_MAX;
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src[1] = samples[1] / (float)INT16_MAX;
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break;
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case AV_SAMPLE_FMT_FLT:
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src[0] = samplesf[0];
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src[1] = samplesf[1];
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break;
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}
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switch (s->scale) {
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case SQRT:
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src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
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src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
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break;
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case CBRT:
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src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
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src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
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break;
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case LOG:
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src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
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src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
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break;
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}
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if (s->mode == LISSAJOUS) {
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x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
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y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
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} else if (s->mode == LISSAJOUS_XY) {
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x = (src[1] * zoom + 1) * hw;
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y = (src[0] * zoom + 1) * hh;
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} else {
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float sx, sy, cx, cy;
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sx = src[1] * zoom;
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sy = src[0] * zoom;
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cx = sx * sqrtf(1 - 0.5 * sy * sy);
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cy = sy * sqrtf(1 - 0.5 * sx * sx);
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x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
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y = s->h - s->h * fabsf(cx + cy) * .7;
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}
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if (s->draw == DOT) {
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draw_dot(s, x, y);
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} else {
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draw_line(s, x, y, prev_x, prev_y);
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}
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prev_x = x;
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prev_y = y;
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}
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s->prev_x = x, s->prev_y = y;
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av_frame_free(&insamples);
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return ff_filter_frame(outlink, av_frame_clone(s->outpicref));
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AudioVectorScopeContext *s = ctx->priv;
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av_frame_free(&s->outpicref);
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}
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static const AVFilterPad audiovectorscope_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad audiovectorscope_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_avf_avectorscope = {
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.name = "avectorscope",
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.description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
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.uninit = uninit,
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.query_formats = query_formats,
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.priv_size = sizeof(AudioVectorScopeContext),
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.inputs = audiovectorscope_inputs,
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.outputs = audiovectorscope_outputs,
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.priv_class = &avectorscope_class,
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};
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