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 {
43 enum VectorScopeDraw {
49 typedef struct AudioVectorScopeContext {
59 unsigned prev_x, prev_y;
60 AVRational frame_rate;
61 } AudioVectorScopeContext;
63 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
64 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
66 static const AVOption avectorscope_options[] = {
67 { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
68 { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
69 { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" },
70 { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
71 { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" },
72 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
73 { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
74 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
75 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
76 { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS },
77 { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
78 { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS },
79 { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
80 { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
81 { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
82 { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
83 { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
84 { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 10, FLAGS },
85 { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" },
86 { "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" },
87 { "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" },
91 AVFILTER_DEFINE_CLASS(avectorscope);
93 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
95 const int linesize = s->outpicref->linesize[0];
99 if (y >= s->h || x >= s->w)
102 y = FFMIN(y, s->h - 1);
103 x = FFMIN(x, s->w - 1);
106 dst = &s->outpicref->data[0][y * linesize + x * 4];
107 dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
108 dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
109 dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
110 dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
113 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
115 int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
116 int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
117 int err = (dx>dy ? dx : -dy) / 2, e2;
122 if (x0 == x1 && y0 == y1)
139 static void fade(AudioVectorScopeContext *s)
141 const int linesize = s->outpicref->linesize[0];
144 if (s->fade[0] || s->fade[1] || s->fade[2]) {
145 uint8_t *d = s->outpicref->data[0];
146 for (i = 0; i < s->h; i++) {
147 for (j = 0; j < s->w*4; j+=4) {
148 d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
149 d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
150 d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
151 d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
158 static int query_formats(AVFilterContext *ctx)
160 AVFilterFormats *formats = NULL;
161 AVFilterChannelLayouts *layout = NULL;
162 AVFilterLink *inlink = ctx->inputs[0];
163 AVFilterLink *outlink = ctx->outputs[0];
164 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
165 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
168 formats = ff_make_format_list(sample_fmts);
169 if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 ||
170 (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
171 (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0)
174 formats = ff_all_samplerates();
175 if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
178 formats = ff_make_format_list(pix_fmts);
179 if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
185 static int config_input(AVFilterLink *inlink)
187 AVFilterContext *ctx = inlink->dst;
188 AudioVectorScopeContext *s = ctx->priv;
191 nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
192 inlink->partial_buf_size =
193 inlink->min_samples =
194 inlink->max_samples = nb_samples;
199 static int config_output(AVFilterLink *outlink)
201 AudioVectorScopeContext *s = outlink->src->priv;
205 outlink->sample_aspect_ratio = (AVRational){1,1};
206 outlink->frame_rate = s->frame_rate;
208 s->prev_x = s->hw = s->w / 2;
209 s->prev_y = s->hh = s->h / 2;
214 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
216 AVFilterContext *ctx = inlink->dst;
217 AVFilterLink *outlink = ctx->outputs[0];
218 AudioVectorScopeContext *s = ctx->priv;
219 const int hw = s->hw;
220 const int hh = s->hh;
222 unsigned prev_x = s->prev_x, prev_y = s->prev_y;
223 const double zoom = s->zoom;
226 if (!s->outpicref || s->outpicref->width != outlink->w ||
227 s->outpicref->height != outlink->h) {
228 av_frame_free(&s->outpicref);
229 s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
231 av_frame_free(&insamples);
232 return AVERROR(ENOMEM);
235 for (i = 0; i < outlink->h; i++)
236 memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
238 s->outpicref->pts = insamples->pts;
242 switch (insamples->format) {
243 case AV_SAMPLE_FMT_S16:
244 for (i = 0; i < insamples->nb_samples; i++) {
245 int16_t *src = (int16_t *)insamples->data[0] + i * 2;
247 if (s->mode == LISSAJOUS) {
248 x = ((src[1] - src[0]) * zoom / (float)(UINT16_MAX) + 1) * hw;
249 y = (1.0 - (src[0] + src[1]) * zoom / (float)UINT16_MAX) * hh;
250 } else if (s->mode == LISSAJOUS_XY) {
251 x = (src[1] * zoom / (float)INT16_MAX + 1) * hw;
252 y = (src[0] * zoom / (float)INT16_MAX + 1) * hh;
254 float sx, sy, cx, cy;
256 sx = src[1] * zoom / (float)INT16_MAX;
257 sy = src[0] * zoom / (float)INT16_MAX;
258 cx = sx * sqrtf(1 - 0.5*sy*sy);
259 cy = sy * sqrtf(1 - 0.5*sx*sx);
260 x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
261 y = s->h - s->h * fabsf(cx + cy) * .7;
264 if (s->draw == DOT) {
267 draw_line(s, x, y, prev_x, prev_y);
273 case AV_SAMPLE_FMT_FLT:
274 for (i = 0; i < insamples->nb_samples; i++) {
275 float *src = (float *)insamples->data[0] + i * 2;
277 if (s->mode == LISSAJOUS) {
278 x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
279 y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
280 } else if (s->mode == LISSAJOUS_XY){
281 x = (src[1] * zoom + 1) * hw;
282 y = (src[0] * zoom + 1) * hh;
284 float sx, sy, cx, cy;
288 cx = sx * sqrtf(1 - 0.5 * sy * sy);
289 cy = sy * sqrtf(1 - 0.5 * sx * sx);
290 x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
291 y = s->h - s->h * fabsf(cx + cy) * .7;
294 if (s->draw == DOT) {
297 draw_line(s, x, y, prev_x, prev_y);
305 s->prev_x = x, s->prev_y = y;
306 av_frame_free(&insamples);
308 return ff_filter_frame(outlink, av_frame_clone(s->outpicref));
311 static av_cold void uninit(AVFilterContext *ctx)
313 AudioVectorScopeContext *s = ctx->priv;
315 av_frame_free(&s->outpicref);
318 static const AVFilterPad audiovectorscope_inputs[] = {
321 .type = AVMEDIA_TYPE_AUDIO,
322 .config_props = config_input,
323 .filter_frame = filter_frame,
328 static const AVFilterPad audiovectorscope_outputs[] = {
331 .type = AVMEDIA_TYPE_VIDEO,
332 .config_props = config_output,
337 AVFilter ff_avf_avectorscope = {
338 .name = "avectorscope",
339 .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
341 .query_formats = query_formats,
342 .priv_size = sizeof(AudioVectorScopeContext),
343 .inputs = audiovectorscope_inputs,
344 .outputs = audiovectorscope_outputs,
345 .priv_class = &avectorscope_class,