mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
12 years ago
parent
50e66726a2
commit
005ee7a586
6 changed files with 340 additions and 2 deletions
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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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* audio to video multimedia vector scope 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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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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}; |
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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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}, |
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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("Display audio vector scope."), |
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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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