2 * Copyright (c) 2013 Paul B Mahol
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * audio to video multimedia vectorscope filter
26 #include "libavutil/avassert.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
36 enum VectorScopeMode {
42 typedef struct AudioVectorScopeContext {
47 enum VectorScopeMode mode;
51 AVRational frame_rate;
52 } AudioVectorScopeContext;
54 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
55 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
57 static const AVOption avectorscope_options[] = {
58 { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
59 { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
60 { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" },
61 { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
62 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
63 { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
64 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
65 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
66 { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS },
67 { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
68 { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS },
69 { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
70 { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
71 { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
72 { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 10, FLAGS },
76 AVFILTER_DEFINE_CLASS(avectorscope);
78 static void draw_dot(AudioVectorScopeContext *p, unsigned x, unsigned y)
80 const int linesize = p->outpicref->linesize[0];
84 if (y >= p->h || x >= p->w)
87 y = FFMIN(y, p->h - 1);
88 x = FFMIN(x, p->w - 1);
91 dst = &p->outpicref->data[0][y * linesize + x * 4];
92 dst[0] = FFMIN(dst[0] + p->contrast[0], 255);
93 dst[1] = FFMIN(dst[1] + p->contrast[1], 255);
94 dst[2] = FFMIN(dst[2] + p->contrast[2], 255);
97 static void fade(AudioVectorScopeContext *p)
99 const int linesize = p->outpicref->linesize[0];
102 if (p->fade[0] || p->fade[1] || p->fade[2]) {
103 uint8_t *d = p->outpicref->data[0];
104 for (i = 0; i < p->h; i++) {
105 for (j = 0; j < p->w*4; j+=4) {
106 d[j+0] = FFMAX(d[j+0] - p->fade[0], 0);
107 d[j+1] = FFMAX(d[j+1] - p->fade[1], 0);
108 d[j+2] = FFMAX(d[j+2] - p->fade[2], 0);
115 static int query_formats(AVFilterContext *ctx)
117 AVFilterFormats *formats = NULL;
118 AVFilterChannelLayouts *layout = NULL;
119 AVFilterLink *inlink = ctx->inputs[0];
120 AVFilterLink *outlink = ctx->outputs[0];
121 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
122 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
124 formats = ff_make_format_list(sample_fmts);
126 return AVERROR(ENOMEM);
127 ff_formats_ref(formats, &inlink->out_formats);
129 ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO);
130 ff_channel_layouts_ref(layout, &inlink->out_channel_layouts);
132 formats = ff_all_samplerates();
134 return AVERROR(ENOMEM);
135 ff_formats_ref(formats, &inlink->out_samplerates);
137 formats = ff_make_format_list(pix_fmts);
139 return AVERROR(ENOMEM);
140 ff_formats_ref(formats, &outlink->in_formats);
145 static int config_input(AVFilterLink *inlink)
147 AVFilterContext *ctx = inlink->dst;
148 AudioVectorScopeContext *p = ctx->priv;
151 nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(p->frame_rate)) + 0.5);
152 inlink->partial_buf_size =
153 inlink->min_samples =
154 inlink->max_samples = nb_samples;
159 static int config_output(AVFilterLink *outlink)
161 AudioVectorScopeContext *p = outlink->src->priv;
165 outlink->sample_aspect_ratio = (AVRational){1,1};
166 outlink->frame_rate = p->frame_rate;
174 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
176 AVFilterContext *ctx = inlink->dst;
177 AVFilterLink *outlink = ctx->outputs[0];
178 AudioVectorScopeContext *p = ctx->priv;
179 const int hw = p->hw;
180 const int hh = p->hh;
182 const double zoom = p->zoom;
185 if (!p->outpicref || p->outpicref->width != outlink->w ||
186 p->outpicref->height != outlink->h) {
187 av_frame_free(&p->outpicref);
188 p->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
190 av_frame_free(&insamples);
191 return AVERROR(ENOMEM);
194 for (i = 0; i < outlink->h; i++)
195 memset(p->outpicref->data[0] + i * p->outpicref->linesize[0], 0, outlink->w * 4);
197 p->outpicref->pts = insamples->pts;
201 switch (insamples->format) {
202 case AV_SAMPLE_FMT_S16:
203 for (i = 0; i < insamples->nb_samples; i++) {
204 int16_t *src = (int16_t *)insamples->data[0] + i * 2;
206 if (p->mode == LISSAJOUS) {
207 x = ((src[1] - src[0]) * zoom / (float)(UINT16_MAX) + 1) * hw;
208 y = (1.0 - (src[0] + src[1]) * zoom / (float)UINT16_MAX) * hh;
210 x = (src[1] * zoom / (float)INT16_MAX + 1) * hw;
211 y = (src[0] * zoom / (float)INT16_MAX + 1) * hh;
217 case AV_SAMPLE_FMT_FLT:
218 for (i = 0; i < insamples->nb_samples; i++) {
219 float *src = (float *)insamples->data[0] + i * 2;
221 if (p->mode == LISSAJOUS) {
222 x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
223 y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
225 x = (src[1] * zoom + 1) * hw;
226 y = (src[0] * zoom + 1) * hh;
234 av_frame_free(&insamples);
236 return ff_filter_frame(outlink, av_frame_clone(p->outpicref));
239 static av_cold void uninit(AVFilterContext *ctx)
241 AudioVectorScopeContext *p = ctx->priv;
243 av_frame_free(&p->outpicref);
246 static const AVFilterPad audiovectorscope_inputs[] = {
249 .type = AVMEDIA_TYPE_AUDIO,
250 .config_props = config_input,
251 .filter_frame = filter_frame,
256 static const AVFilterPad audiovectorscope_outputs[] = {
259 .type = AVMEDIA_TYPE_VIDEO,
260 .config_props = config_output,
265 AVFilter ff_avf_avectorscope = {
266 .name = "avectorscope",
267 .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
269 .query_formats = query_formats,
270 .priv_size = sizeof(AudioVectorScopeContext),
271 .inputs = audiovectorscope_inputs,
272 .outputs = audiovectorscope_outputs,
273 .priv_class = &avectorscope_class,