| 1 | /* |
| 2 | * Copyright (c) 2013 Paul B Mahol |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 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. |
| 10 | * |
| 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. |
| 15 | * |
| 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 |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * audio to video multimedia vectorscope filter |
| 24 | */ |
| 25 | |
| 26 | #include "libavutil/avassert.h" |
| 27 | #include "libavutil/channel_layout.h" |
| 28 | #include "libavutil/opt.h" |
| 29 | #include "libavutil/parseutils.h" |
| 30 | #include "avfilter.h" |
| 31 | #include "formats.h" |
| 32 | #include "audio.h" |
| 33 | #include "video.h" |
| 34 | #include "internal.h" |
| 35 | |
| 36 | enum VectorScopeMode { |
| 37 | LISSAJOUS, |
| 38 | LISSAJOUS_XY, |
| 39 | MODE_NB, |
| 40 | }; |
| 41 | |
| 42 | typedef struct AudioVectorScopeContext { |
| 43 | const AVClass *class; |
| 44 | AVFrame *outpicref; |
| 45 | int w, h; |
| 46 | int hw, hh; |
| 47 | enum VectorScopeMode mode; |
| 48 | int contrast[3]; |
| 49 | int fade[3]; |
| 50 | double zoom; |
| 51 | AVRational frame_rate; |
| 52 | } AudioVectorScopeContext; |
| 53 | |
| 54 | #define OFFSET(x) offsetof(AudioVectorScopeContext, x) |
| 55 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| 56 | |
| 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 }, |
| 73 | { NULL } |
| 74 | }; |
| 75 | |
| 76 | AVFILTER_DEFINE_CLASS(avectorscope); |
| 77 | |
| 78 | static void draw_dot(AudioVectorScopeContext *p, unsigned x, unsigned y) |
| 79 | { |
| 80 | const int linesize = p->outpicref->linesize[0]; |
| 81 | uint8_t *dst; |
| 82 | |
| 83 | if (p->zoom > 1) { |
| 84 | if (y >= p->h || x >= p->w) |
| 85 | return; |
| 86 | } else { |
| 87 | y = FFMIN(y, p->h - 1); |
| 88 | x = FFMIN(x, p->w - 1); |
| 89 | } |
| 90 | |
| 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); |
| 95 | } |
| 96 | |
| 97 | static void fade(AudioVectorScopeContext *p) |
| 98 | { |
| 99 | const int linesize = p->outpicref->linesize[0]; |
| 100 | int i, j; |
| 101 | |
| 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); |
| 109 | } |
| 110 | d += linesize; |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | static int query_formats(AVFilterContext *ctx) |
| 116 | { |
| 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 }; |
| 123 | |
| 124 | formats = ff_make_format_list(sample_fmts); |
| 125 | if (!formats) |
| 126 | return AVERROR(ENOMEM); |
| 127 | ff_formats_ref(formats, &inlink->out_formats); |
| 128 | |
| 129 | ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO); |
| 130 | ff_channel_layouts_ref(layout, &inlink->out_channel_layouts); |
| 131 | |
| 132 | formats = ff_all_samplerates(); |
| 133 | if (!formats) |
| 134 | return AVERROR(ENOMEM); |
| 135 | ff_formats_ref(formats, &inlink->out_samplerates); |
| 136 | |
| 137 | formats = ff_make_format_list(pix_fmts); |
| 138 | if (!formats) |
| 139 | return AVERROR(ENOMEM); |
| 140 | ff_formats_ref(formats, &outlink->in_formats); |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | static int config_input(AVFilterLink *inlink) |
| 146 | { |
| 147 | AVFilterContext *ctx = inlink->dst; |
| 148 | AudioVectorScopeContext *p = ctx->priv; |
| 149 | int nb_samples; |
| 150 | |
| 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; |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | static int config_output(AVFilterLink *outlink) |
| 160 | { |
| 161 | AudioVectorScopeContext *p = outlink->src->priv; |
| 162 | |
| 163 | outlink->w = p->w; |
| 164 | outlink->h = p->h; |
| 165 | outlink->sample_aspect_ratio = (AVRational){1,1}; |
| 166 | outlink->frame_rate = p->frame_rate; |
| 167 | |
| 168 | p->hw = p->w / 2; |
| 169 | p->hh = p->h / 2; |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) |
| 175 | { |
| 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; |
| 181 | unsigned x, y; |
| 182 | const double zoom = p->zoom; |
| 183 | int i; |
| 184 | |
| 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); |
| 189 | if (!p->outpicref) { |
| 190 | av_frame_free(&insamples); |
| 191 | return AVERROR(ENOMEM); |
| 192 | } |
| 193 | |
| 194 | for (i = 0; i < outlink->h; i++) |
| 195 | memset(p->outpicref->data[0] + i * p->outpicref->linesize[0], 0, outlink->w * 4); |
| 196 | } |
| 197 | p->outpicref->pts = insamples->pts; |
| 198 | |
| 199 | fade(p); |
| 200 | |
| 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; |
| 205 | |
| 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; |
| 209 | } else { |
| 210 | x = (src[1] * zoom / (float)INT16_MAX + 1) * hw; |
| 211 | y = (src[0] * zoom / (float)INT16_MAX + 1) * hh; |
| 212 | } |
| 213 | |
| 214 | draw_dot(p, x, y); |
| 215 | } |
| 216 | break; |
| 217 | case AV_SAMPLE_FMT_FLT: |
| 218 | for (i = 0; i < insamples->nb_samples; i++) { |
| 219 | float *src = (float *)insamples->data[0] + i * 2; |
| 220 | |
| 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; |
| 224 | } else { |
| 225 | x = (src[1] * zoom + 1) * hw; |
| 226 | y = (src[0] * zoom + 1) * hh; |
| 227 | } |
| 228 | |
| 229 | draw_dot(p, x, y); |
| 230 | } |
| 231 | break; |
| 232 | } |
| 233 | |
| 234 | av_frame_free(&insamples); |
| 235 | |
| 236 | return ff_filter_frame(outlink, av_frame_clone(p->outpicref)); |
| 237 | } |
| 238 | |
| 239 | static av_cold void uninit(AVFilterContext *ctx) |
| 240 | { |
| 241 | AudioVectorScopeContext *p = ctx->priv; |
| 242 | |
| 243 | av_frame_free(&p->outpicref); |
| 244 | } |
| 245 | |
| 246 | static const AVFilterPad audiovectorscope_inputs[] = { |
| 247 | { |
| 248 | .name = "default", |
| 249 | .type = AVMEDIA_TYPE_AUDIO, |
| 250 | .config_props = config_input, |
| 251 | .filter_frame = filter_frame, |
| 252 | }, |
| 253 | { NULL } |
| 254 | }; |
| 255 | |
| 256 | static const AVFilterPad audiovectorscope_outputs[] = { |
| 257 | { |
| 258 | .name = "default", |
| 259 | .type = AVMEDIA_TYPE_VIDEO, |
| 260 | .config_props = config_output, |
| 261 | }, |
| 262 | { NULL } |
| 263 | }; |
| 264 | |
| 265 | AVFilter ff_avf_avectorscope = { |
| 266 | .name = "avectorscope", |
| 267 | .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."), |
| 268 | .uninit = uninit, |
| 269 | .query_formats = query_formats, |
| 270 | .priv_size = sizeof(AudioVectorScopeContext), |
| 271 | .inputs = audiovectorscope_inputs, |
| 272 | .outputs = audiovectorscope_outputs, |
| 273 | .priv_class = &avectorscope_class, |
| 274 | }; |