501 lines
16 KiB
C
501 lines
16 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 "filters.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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AALINE,
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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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int swap;
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int mirror;
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unsigned prev_x, prev_y;
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AVRational frame_rate;
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int nb_samples;
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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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#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_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, TFLAGS, .unit = "mode" },
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{ "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, .unit = "mode" },
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{ "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, TFLAGS, .unit = "mode" },
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{ "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, TFLAGS, .unit = "mode" },
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{ "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, TFLAGS, .unit = "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, TFLAGS },
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{ "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, TFLAGS },
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{ "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, TFLAGS },
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{ "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, TFLAGS },
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{ "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, TFLAGS },
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{ "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, TFLAGS },
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{ "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
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{ "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
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{ "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, TFLAGS },
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{ "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, TFLAGS, .unit = "draw" },
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{ "dot", "draw dots", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, TFLAGS, .unit = "draw" },
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{ "line", "draw lines", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, TFLAGS, .unit = "draw" },
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{ "aaline","draw anti-aliased lines", 0, AV_OPT_TYPE_CONST, {.i64=AALINE},0,0, TFLAGS, .unit = "draw" },
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{ "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, TFLAGS, .unit = "scale" },
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, TFLAGS, .unit = "scale" },
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{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, TFLAGS, .unit = "scale" },
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{ "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, TFLAGS, .unit = "scale" },
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{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, TFLAGS, .unit = "scale" },
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{ "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, TFLAGS },
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{ "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, TFLAGS, .unit = "mirror" },
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{ "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, TFLAGS, .unit = "mirror" },
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{ "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, TFLAGS, .unit = "mirror" },
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{ "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, TFLAGS, .unit = "mirror" },
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{ "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, TFLAGS, .unit = "mirror" },
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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, int value)
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{
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const ptrdiff_t 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], value);
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dst[1] = FFMIN(dst[1] + s->contrast[1], value);
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dst[2] = FFMIN(dst[2] + s->contrast[2], value);
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dst[3] = FFMIN(dst[3] + s->contrast[3], value);
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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, 255);
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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 draw_aaline(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
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{
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int sx = x0 < x1 ? 1 : -1, sy = y0 < y1 ? 1 : -1, x2;
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int dx = FFABS(x1-x0), dy = FFABS(y1-y0), err = dx * dx + dy * dy;
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int e2 = err == 0 ? 1 : 0xffffff / (dx + dy);
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dx *= e2;
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dy *= e2;
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err = dx - dy;
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for (;;) {
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draw_dot(s, x0, y0, 255-(FFABS(err - dx + dy) >> 16));
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e2 = err;
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x2 = x0;
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if (2 * e2 >= -dx) {
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if (x0 == x1)
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break;
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if (e2 + dy < 0xff0000)
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draw_dot(s, x0, y0 + sy, 255-((e2 + dy) >> 16));
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err -= dy;
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x0 += sx;
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}
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if (2 * e2 <= dy) {
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if (y0 == y1)
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break;
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if (dx - e2 < 0xff0000)
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draw_dot(s, x2 + sx, y0, 255-((dx - e2) >> 16));
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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 int fade(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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AudioVectorScopeContext *s = ctx->priv;
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const int linesize = s->outpicref->linesize[0];
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const int height = s->outpicref->height;
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const int slice_start = (height * jobnr ) / nb_jobs;
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const int slice_end = (height * (jobnr+1)) / nb_jobs;
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if (s->fade[0] == 255 && s->fade[1] == 255 && s->fade[2] == 255) {
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for (int i = slice_start; i < slice_end; i++)
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memset(s->outpicref->data[0] + i * linesize, 0, s->outpicref->width * 4);
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return 0;
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}
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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] + slice_start * linesize;
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for (int i = slice_start; i < slice_end; i++) {
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for (int j = 0; j < s->w*4; j+=4) {
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if (d[j+0])
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d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
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if (d[j+1])
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d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
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if (d[j+2])
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d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
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if (d[j+3])
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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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return 0;
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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->outcfg.formats )) < 0 ||
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(ret = ff_add_channel_layout (&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
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(ret = ff_channel_layouts_ref (layout , &inlink->outcfg.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->outcfg.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->incfg.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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s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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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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outlink->time_base = av_inv_q(outlink->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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const int16_t *samples = (const int16_t *)insamples->data[0];
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const float *samplesf = (const float *)insamples->data[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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AVFrame *clone;
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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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double zoom = s->zoom;
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int ret;
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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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s->outpicref->sample_aspect_ratio = (AVRational){1,1};
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for (int 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 = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
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s->outpicref->duration = 1;
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ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
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if (ret < 0) {
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av_frame_free(&insamples);
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return ret;
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}
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ff_filter_execute(ctx, fade, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
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if (zoom < 1) {
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float max = 0;
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switch (insamples->format) {
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case AV_SAMPLE_FMT_S16:
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for (int i = 0; i < insamples->nb_samples * 2; i++) {
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float sample = samples[i] / (float)INT16_MAX;
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max = FFMAX(FFABS(sample), max);
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}
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break;
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case AV_SAMPLE_FMT_FLT:
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for (int i = 0; i < insamples->nb_samples * 2; i++) {
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max = FFMAX(FFABS(samplesf[i]), max);
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}
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break;
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default:
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av_assert2(0);
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}
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switch (s->scale) {
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case SQRT:
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max = sqrtf(max);
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break;
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case CBRT:
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max = cbrtf(max);
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break;
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case LOG:
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max = logf(1 + max) / logf(2);
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break;
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}
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if (max > 0.f)
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zoom = 1. / max;
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}
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for (int i = 0; i < insamples->nb_samples; i++) {
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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[i*2+0] / (float)INT16_MAX;
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src[1] = samples[i*2+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[i*2+0];
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src[1] = samplesf[i*2+1];
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break;
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default:
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av_assert2(0);
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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->mirror & 1)
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src[0] = -src[0];
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if (s->mirror & 2)
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src[1] = -src[1];
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if (s->swap)
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FFSWAP(float, src[0], src[1]);
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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, 255);
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} else if (s->draw == LINE) {
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draw_line(s, x, y, prev_x, prev_y);
|
|
} else {
|
|
draw_aaline(s, x, y, prev_x, prev_y);
|
|
}
|
|
prev_x = x;
|
|
prev_y = y;
|
|
}
|
|
|
|
s->prev_x = x, s->prev_y = y;
|
|
av_frame_free(&insamples);
|
|
|
|
clone = av_frame_clone(s->outpicref);
|
|
if (!clone)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return ff_filter_frame(outlink, clone);
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
AudioVectorScopeContext *s = ctx->priv;
|
|
AVFrame *in;
|
|
int ret;
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
|
|
|
|
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
return filter_frame(inlink, in);
|
|
|
|
if (ff_inlink_queued_samples(inlink) >= s->nb_samples) {
|
|
ff_filter_set_ready(ctx, 10);
|
|
return 0;
|
|
}
|
|
|
|
FF_FILTER_FORWARD_STATUS(inlink, outlink);
|
|
FF_FILTER_FORWARD_WANTED(outlink, inlink);
|
|
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
AudioVectorScopeContext *s = ctx->priv;
|
|
|
|
av_frame_free(&s->outpicref);
|
|
}
|
|
|
|
static const AVFilterPad audiovectorscope_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.config_props = config_input,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad audiovectorscope_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_avf_avectorscope = {
|
|
.name = "avectorscope",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(AudioVectorScopeContext),
|
|
.activate = activate,
|
|
FILTER_INPUTS(audiovectorscope_inputs),
|
|
FILTER_OUTPUTS(audiovectorscope_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
.priv_class = &avectorscope_class,
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS,
|
|
.process_command = ff_filter_process_command,
|
|
};
|