2013-02-21 11:32:59 +01:00
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/*
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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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2013-09-14 14:11:22 +02:00
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* audio to video multimedia vectorscope filter
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2013-02-21 11:32:59 +01:00
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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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MODE_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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enum VectorScopeMode mode;
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int contrast[3];
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int fade[3];
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double zoom;
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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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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, 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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{ "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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{ "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 10, FLAGS },
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{ NULL }
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2013-02-21 11:32:59 +01:00
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};
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AVFILTER_DEFINE_CLASS(avectorscope);
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static void draw_dot(AudioVectorScopeContext *p, unsigned x, unsigned y)
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{
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const int linesize = p->outpicref->linesize[0];
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uint8_t *dst;
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if (p->zoom > 1) {
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if (y >= p->h || x >= p->w)
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return;
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} else {
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y = FFMIN(y, p->h - 1);
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x = FFMIN(x, p->w - 1);
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}
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dst = &p->outpicref->data[0][y * linesize + x * 4];
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dst[0] = FFMIN(dst[0] + p->contrast[0], 255);
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dst[1] = FFMIN(dst[1] + p->contrast[1], 255);
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dst[2] = FFMIN(dst[2] + p->contrast[2], 255);
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}
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static void fade(AudioVectorScopeContext *p)
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{
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const int linesize = p->outpicref->linesize[0];
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int i, j;
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if (p->fade[0] || p->fade[1] || p->fade[2]) {
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uint8_t *d = p->outpicref->data[0];
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for (i = 0; i < p->h; i++) {
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for (j = 0; j < p->w*4; j+=4) {
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d[j+0] = FFMAX(d[j+0] - p->fade[0], 0);
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d[j+1] = FFMAX(d[j+1] - p->fade[1], 0);
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d[j+2] = FFMAX(d[j+2] - p->fade[2], 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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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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ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO);
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ff_channel_layouts_ref(layout, &inlink->out_channel_layouts);
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formats = ff_all_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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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_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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AudioVectorScopeContext *p = ctx->priv;
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int nb_samples;
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nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(p->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 *p = outlink->src->priv;
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outlink->w = p->w;
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outlink->h = p->h;
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outlink->sample_aspect_ratio = (AVRational){1,1};
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outlink->frame_rate = p->frame_rate;
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p->hw = p->w / 2;
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p->hh = p->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 *p = ctx->priv;
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const int hw = p->hw;
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const int hh = p->hh;
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unsigned x, y;
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const double zoom = p->zoom;
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int i;
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if (!p->outpicref || p->outpicref->width != outlink->w ||
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p->outpicref->height != outlink->h) {
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av_frame_free(&p->outpicref);
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p->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!p->outpicref)
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av_frame_free(&insamples);
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return AVERROR(ENOMEM);
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for (i = 0; i < outlink->h; i++)
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memset(p->outpicref->data[0] + i * p->outpicref->linesize[0], 0, outlink->w * 4);
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}
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p->outpicref->pts = insamples->pts;
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fade(p);
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switch (insamples->format) {
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case AV_SAMPLE_FMT_S16:
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for (i = 0; i < insamples->nb_samples; i++) {
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int16_t *src = (int16_t *)insamples->data[0] + i * 2;
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if (p->mode == LISSAJOUS) {
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x = ((src[1] - src[0]) * zoom / (float)(UINT16_MAX) + 1) * hw;
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y = (1.0 - (src[0] + src[1]) * zoom / (float)UINT16_MAX) * hh;
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} else {
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x = (src[1] * zoom / (float)INT16_MAX + 1) * hw;
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y = (src[0] * zoom / (float)INT16_MAX + 1) * hh;
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}
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draw_dot(p, x, y);
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}
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break;
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case AV_SAMPLE_FMT_FLT:
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for (i = 0; i < insamples->nb_samples; i++) {
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float *src = (float *)insamples->data[0] + i * 2;
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if (p->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 {
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x = (src[1] * zoom + 1) * hw;
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y = (src[0] * zoom + 1) * hh;
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}
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draw_dot(p, x, y);
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}
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break;
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}
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av_frame_free(&insamples);
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return ff_filter_frame(outlink, av_frame_clone(p->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 *p = ctx->priv;
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av_frame_free(&p->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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2013-02-21 11:32:59 +01:00
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},
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{ NULL }
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};
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AVFilter avfilter_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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