libavfilter/vsrc_testsrc.c

   1 /*
   2  * Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
   3  * Copyright (c) 2011 Stefano Sabatini
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * Misc test sources.
  25  *
  26  * testsrc is based on the test pattern generator demuxer by Nicolas George:
  27  * http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2007-October/037845.html
  28  *
  29  * rgbtestsrc is ported from MPlayer libmpcodecs/vf_rgbtest.c by
  30  * Michael Niedermayer.
  31  */
  32
  33 #include <float.h>
  34
  35 #include "libavutil/mathematics.h"
  36 #include "libavutil/opt.h"
  37 #include "libavutil/intreadwrite.h"
  38 #include "libavutil/parseutils.h"
  39 #include "avfilter.h"
  40
  41 typedef struct {
  42     const AVClass *class;
  43     int h, w;
  44     unsigned int nb_frame;
  45     AVRational time_base;
  46     int64_t pts, max_pts;
  47     char *size;                 ///< video frame size
  48     char *rate;                 ///< video frame rate
  49     char *duration;             ///< total duration of the generated video
  50     AVRational sar;             ///< sample aspect ratio
  51
  52     void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
  53
  54     /* only used by rgbtest */
  55     int rgba_map[4];
  56 } TestSourceContext;
  57
  58 #define OFFSET(x) offsetof(TestSourceContext, x)
  59
  60 static const AVOption testsrc_options[] = {
  61     { "size",     "set video size",     OFFSET(size),     FF_OPT_TYPE_STRING, {.str = "320x240"}},
  62     { "s",        "set video size",     OFFSET(size),     FF_OPT_TYPE_STRING, {.str = "320x240"}},
  63     { "rate",     "set video rate",     OFFSET(rate),     FF_OPT_TYPE_STRING, {.str = "25"},    },
  64     { "r",        "set video rate",     OFFSET(rate),     FF_OPT_TYPE_STRING, {.str = "25"},    },
  65     { "duration", "set video duration", OFFSET(duration), FF_OPT_TYPE_STRING, {.str = NULL},    },
  66     { "sar",      "set video sample aspect ratio", OFFSET(sar), FF_OPT_TYPE_RATIONAL, {1},  0, INT_MAX },
  67     { NULL },
  68 };
  69
  70 static av_cold int init_common(AVFilterContext *ctx, const char *args, void *opaque)
  71 {
  72     TestSourceContext *test = ctx->priv;
  73     AVRational frame_rate_q;
  74     int64_t duration = -1;
  75     int ret = 0;
  76
  77     av_opt_set_defaults(test);
  78
  79     if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0) {
  80         av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
  81         return ret;
  82     }
  83
  84     if ((ret = av_parse_video_size(&test->w, &test->h, test->size)) < 0) {
  85         av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", test->size);
  86         return ret;
  87     }
  88
  89     if ((ret = av_parse_video_rate(&frame_rate_q, test->rate)) < 0 ||
  90         frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
  91         av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", test->rate);
  92         return ret;
  93     }
  94
  95     if ((test->duration) && (ret = av_parse_time(&duration, test->duration, 1)) < 0) {
  96         av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration);
  97         return ret;
  98     }
  99
 100     test->time_base.num = frame_rate_q.den;
 101     test->time_base.den = frame_rate_q.num;
 102     test->max_pts = duration >= 0 ?
 103         av_rescale_q(duration, AV_TIME_BASE_Q, test->time_base) : -1;
 104     test->nb_frame = 0;
 105     test->pts = 0;
 106
 107     av_log(ctx, AV_LOG_DEBUG, "size:%dx%d rate:%d/%d duration:%f sar:%d/%d\n",
 108            test->w, test->h, frame_rate_q.num, frame_rate_q.den,
 109            duration < 0 ? -1 : test->max_pts * av_q2d(test->time_base),
 110            test->sar.num, test->sar.den);
 111     return 0;
 112 }
 113
 114 static int config_props(AVFilterLink *outlink)
 115 {
 116     TestSourceContext *test = outlink->src->priv;
 117
 118     outlink->w = test->w;
 119     outlink->h = test->h;
 120     outlink->sample_aspect_ratio = test->sar;
 121     outlink->time_base = test->time_base;
 122
 123     return 0;
 124 }
 125
 126 static int request_frame(AVFilterLink *outlink)
 127 {
 128     TestSourceContext *test = outlink->src->priv;
 129     AVFilterBufferRef *picref;
 130
 131     if (test->max_pts >= 0 && test->pts > test->max_pts)
 132         return AVERROR_EOF;
 133     picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
 134                                        test->w, test->h);
 135     picref->pts = test->pts++;
 136     picref->pos = -1;
 137     picref->video->key_frame = 1;
 138     picref->video->interlaced = 0;
 139     picref->video->pict_type = AV_PICTURE_TYPE_I;
 140     picref->video->pixel_aspect = test->sar;
 141     test->nb_frame++;
 142     test->fill_picture_fn(outlink->src, picref);
 143
 144     avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
 145     avfilter_draw_slice(outlink, 0, picref->video->h, 1);
 146     avfilter_end_frame(outlink);
 147     avfilter_unref_buffer(picref);
 148
 149     return 0;
 150 }
 151
 152 #if CONFIG_TESTSRC_FILTER
 153
 154 static const char *testsrc_get_name(void *ctx)
 155 {
 156     return "testsrc";
 157 }
 158
 159 static const AVClass testsrc_class = {
 160     .class_name = "TestSourceContext",
 161     .item_name  = testsrc_get_name,
 162     .option     = testsrc_options,
 163 };
 164
 165 /**
 166  * Fill a rectangle with value val.
 167  *
 168  * @param val the RGB value to set
 169  * @param dst pointer to the destination buffer to fill
 170  * @param dst_linesize linesize of destination
 171  * @param segment_width width of the segment
 172  * @param x horizontal coordinate where to draw the rectangle in the destination buffer
 173  * @param y horizontal coordinate where to draw the rectangle in the destination buffer
 174  * @param w width  of the rectangle to draw, expressed as a number of segment_width units
 175  * @param h height of the rectangle to draw, expressed as a number of segment_width units
 176  */
 177 static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, unsigned segment_width,
 178                            unsigned x, unsigned y, unsigned w, unsigned h)
 179 {
 180     int i;
 181     int step = 3;
 182
 183     dst += segment_width * (step * x + y * dst_linesize);
 184     w *= segment_width * step;
 185     h *= segment_width;
 186     for (i = 0; i < h; i++) {
 187         memset(dst, val, w);
 188         dst += dst_linesize;
 189     }
 190 }
 191
 192 static void draw_digit(int digit, uint8_t *dst, unsigned dst_linesize,
 193                        unsigned segment_width)
 194 {
 195 #define TOP_HBAR        1
 196 #define MID_HBAR        2
 197 #define BOT_HBAR        4
 198 #define LEFT_TOP_VBAR   8
 199 #define LEFT_BOT_VBAR  16
 200 #define RIGHT_TOP_VBAR 32
 201 #define RIGHT_BOT_VBAR 64
 202     struct {
 203         int x, y, w, h;
 204     } segments[] = {
 205         { 1,  0, 5, 1 }, /* TOP_HBAR */
 206         { 1,  6, 5, 1 }, /* MID_HBAR */
 207         { 1, 12, 5, 1 }, /* BOT_HBAR */
 208         { 0,  1, 1, 5 }, /* LEFT_TOP_VBAR */
 209         { 0,  7, 1, 5 }, /* LEFT_BOT_VBAR */
 210         { 6,  1, 1, 5 }, /* RIGHT_TOP_VBAR */
 211         { 6,  7, 1, 5 }  /* RIGHT_BOT_VBAR */
 212     };
 213     static const unsigned char masks[10] = {
 214         /* 0 */ TOP_HBAR         |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 215         /* 1 */                                                        RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 216         /* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR                             |RIGHT_TOP_VBAR,
 217         /* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR                            |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 218         /* 4 */          MID_HBAR         |LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 219         /* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR                             |RIGHT_BOT_VBAR,
 220         /* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR               |RIGHT_BOT_VBAR,
 221         /* 7 */ TOP_HBAR                                              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 222         /* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 223         /* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
 224     };
 225     unsigned mask = masks[digit];
 226     int i;
 227
 228     draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
 229     for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
 230         if (mask & (1<<i))
 231             draw_rectangle(255, dst, dst_linesize, segment_width,
 232                            segments[i].x, segments[i].y, segments[i].w, segments[i].h);
 233 }
 234
 235 #define GRADIENT_SIZE (6 * 256)
 236
 237 static void test_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
 238 {
 239     TestSourceContext *test = ctx->priv;
 240     uint8_t *p, *p0;
 241     int x, y;
 242     int color, color_rest;
 243     int icolor;
 244     int radius;
 245     int quad0, quad;
 246     int dquad_x, dquad_y;
 247     int grad, dgrad, rgrad, drgrad;
 248     int seg_size;
 249     int second;
 250     int i;
 251     uint8_t *data = picref->data[0];
 252     int width  = picref->video->w;
 253     int height = picref->video->h;
 254
 255     /* draw colored bars and circle */
 256     radius = (width + height) / 4;
 257     quad0 = width * width / 4 + height * height / 4 - radius * radius;
 258     dquad_y = 1 - height;
 259     p0 = data;
 260     for (y = 0; y < height; y++) {
 261         p = p0;
 262         color = 0;
 263         color_rest = 0;
 264         quad = quad0;
 265         dquad_x = 1 - width;
 266         for (x = 0; x < width; x++) {
 267             icolor = color;
 268             if (quad < 0)
 269                 icolor ^= 7;
 270             quad += dquad_x;
 271             dquad_x += 2;
 272             *(p++) = icolor & 1 ? 255 : 0;
 273             *(p++) = icolor & 2 ? 255 : 0;
 274             *(p++) = icolor & 4 ? 255 : 0;
 275             color_rest += 8;
 276             if (color_rest >= width) {
 277                 color_rest -= width;
 278                 color++;
 279             }
 280         }
 281         quad0 += dquad_y;
 282         dquad_y += 2;
 283         p0 += picref->linesize[0];
 284     }
 285
 286     /* draw sliding color line */
 287     p = data + picref->linesize[0] * height * 3/4;
 288     grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
 289         GRADIENT_SIZE;
 290     rgrad = 0;
 291     dgrad = GRADIENT_SIZE / width;
 292     drgrad = GRADIENT_SIZE % width;
 293     for (x = 0; x < width; x++) {
 294         *(p++) =
 295             grad < 256 || grad >= 5 * 256 ? 255 :
 296             grad >= 2 * 256 && grad < 4 * 256 ? 0 :
 297             grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
 298         *(p++) =
 299             grad >= 4 * 256 ? 0 :
 300             grad >= 1 * 256 && grad < 3 * 256 ? 255 :
 301             grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
 302         *(p++) =
 303             grad < 2 * 256 ? 0 :
 304             grad >= 3 * 256 && grad < 5 * 256 ? 255 :
 305             grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
 306         grad += dgrad;
 307         rgrad += drgrad;
 308         if (rgrad >= GRADIENT_SIZE) {
 309             grad++;
 310             rgrad -= GRADIENT_SIZE;
 311         }
 312         if (grad >= GRADIENT_SIZE)
 313             grad -= GRADIENT_SIZE;
 314     }
 315     for (y = height / 8; y > 0; y--) {
 316         memcpy(p, p - picref->linesize[0], 3 * width);
 317         p += picref->linesize[0];
 318     }
 319
 320     /* draw digits */
 321     seg_size = width / 80;
 322     if (seg_size >= 1 && height >= 13 * seg_size) {
 323         second = test->nb_frame * test->time_base.num / test->time_base.den;
 324         x = width - (width - seg_size * 64) / 2;
 325         y = (height - seg_size * 13) / 2;
 326         p = data + (x*3 + y * picref->linesize[0]);
 327         for (i = 0; i < 8; i++) {
 328             p -= 3 * 8 * seg_size;
 329             draw_digit(second % 10, p, picref->linesize[0], seg_size);
 330             second /= 10;
 331             if (second == 0)
 332                 break;
 333         }
 334     }
 335 }
 336
 337 static av_cold int test_init(AVFilterContext *ctx, const char *args, void *opaque)
 338 {
 339     TestSourceContext *test = ctx->priv;
 340
 341     test->class = &testsrc_class;
 342     test->fill_picture_fn = test_fill_picture;
 343     return init_common(ctx, args, opaque);
 344 }
 345
 346 static int test_query_formats(AVFilterContext *ctx)
 347 {
 348     static const enum PixelFormat pix_fmts[] = {
 349         PIX_FMT_RGB24, PIX_FMT_NONE
 350     };
 351     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
 352     return 0;
 353 }
 354
 355 AVFilter avfilter_vsrc_testsrc = {
 356     .name          = "testsrc",
 357     .description   = NULL_IF_CONFIG_SMALL("Generate test pattern."),
 358     .priv_size     = sizeof(TestSourceContext),
 359     .init          = test_init,
 360
 361     .query_formats = test_query_formats,
 362
 363     .inputs    = (AVFilterPad[]) {{ .name = NULL}},
 364
 365     .outputs   = (AVFilterPad[]) {{ .name = "default",
 366                                     .type = AVMEDIA_TYPE_VIDEO,
 367                                     .request_frame = request_frame,
 368                                     .config_props  = config_props, },
 369                                   { .name = NULL }},
 370 };
 371
 372 #endif /* CONFIG_TESTSRC_FILTER */
 373
 374 #if CONFIG_RGBTESTSRC_FILTER
 375
 376 static const char *rgbtestsrc_get_name(void *ctx)
 377 {
 378     return "rgbtestsrc";
 379 }
 380
 381 static const AVClass rgbtestsrc_class = {
 382     .class_name = "RGBTestSourceContext",
 383     .item_name  = rgbtestsrc_get_name,
 384     .option     = testsrc_options,
 385 };
 386
 387 #define R 0
 388 #define G 1
 389 #define B 2
 390 #define A 3
 391
 392 static void rgbtest_put_pixel(uint8_t *dst, int dst_linesize,
 393                               int x, int y, int r, int g, int b, enum PixelFormat fmt,
 394                               int rgba_map[4])
 395 {
 396     int32_t v;
 397     uint8_t *p;
 398
 399     switch (fmt) {
 400     case PIX_FMT_BGR444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r >> 4) << 8) | ((g >> 4) << 4) | (b >> 4); break;
 401     case PIX_FMT_RGB444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b >> 4) << 8) | ((g >> 4) << 4) | (r >> 4); break;
 402     case PIX_FMT_BGR555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<10) | ((g>>3)<<5) | (b>>3); break;
 403     case PIX_FMT_RGB555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<10) | ((g>>3)<<5) | (r>>3); break;
 404     case PIX_FMT_BGR565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); break;
 405     case PIX_FMT_RGB565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); break;
 406     case PIX_FMT_RGB24:
 407     case PIX_FMT_BGR24:
 408         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
 409         p = dst + 3*x + y*dst_linesize;
 410         AV_WL24(p, v);
 411         break;
 412     case PIX_FMT_RGBA:
 413     case PIX_FMT_BGRA:
 414     case PIX_FMT_ARGB:
 415     case PIX_FMT_ABGR:
 416         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
 417         p = dst + 4*x + y*dst_linesize;
 418         AV_WL32(p, v);
 419         break;
 420     }
 421 }
 422
 423 static void rgbtest_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
 424 {
 425     TestSourceContext *test = ctx->priv;
 426     int x, y, w = picref->video->w, h = picref->video->h;
 427
 428     for (y = 0; y < h; y++) {
 429          for (x = 0; x < picref->video->w; x++) {
 430              int c = 256*x/w;
 431              int r = 0, g = 0, b = 0;
 432
 433              if      (3*y < h  ) r = c;
 434              else if (3*y < 2*h) g = c;
 435              else                b = c;
 436
 437              rgbtest_put_pixel(picref->data[0], picref->linesize[0], x, y, r, g, b,
 438                                ctx->outputs[0]->format, test->rgba_map);
 439          }
 440      }
 441 }
 442
 443 static av_cold int rgbtest_init(AVFilterContext *ctx, const char *args, void *opaque)
 444 {
 445     TestSourceContext *test = ctx->priv;
 446
 447     test->class = &rgbtestsrc_class;
 448     test->fill_picture_fn = rgbtest_fill_picture;
 449     return init_common(ctx, args, opaque);
 450 }
 451
 452 static int rgbtest_query_formats(AVFilterContext *ctx)
 453 {
 454     static const enum PixelFormat pix_fmts[] = {
 455         PIX_FMT_RGBA, PIX_FMT_ARGB, PIX_FMT_BGRA, PIX_FMT_ABGR,
 456         PIX_FMT_BGR24, PIX_FMT_RGB24,
 457         PIX_FMT_RGB444, PIX_FMT_BGR444,
 458         PIX_FMT_RGB565, PIX_FMT_BGR565,
 459         PIX_FMT_RGB555, PIX_FMT_BGR555,
 460         PIX_FMT_NONE
 461     };
 462     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
 463     return 0;
 464 }
 465
 466 static int rgbtest_config_props(AVFilterLink *outlink)
 467 {
 468     TestSourceContext *test = outlink->src->priv;
 469
 470     switch (outlink->format) {
 471     case PIX_FMT_ARGB:  test->rgba_map[A] = 0; test->rgba_map[R] = 1; test->rgba_map[G] = 2; test->rgba_map[B] = 3; break;
 472     case PIX_FMT_ABGR:  test->rgba_map[A] = 0; test->rgba_map[B] = 1; test->rgba_map[G] = 2; test->rgba_map[R] = 3; break;
 473     case PIX_FMT_RGBA:
 474     case PIX_FMT_RGB24: test->rgba_map[R] = 0; test->rgba_map[G] = 1; test->rgba_map[B] = 2; test->rgba_map[A] = 3; break;
 475     case PIX_FMT_BGRA:
 476     case PIX_FMT_BGR24: test->rgba_map[B] = 0; test->rgba_map[G] = 1; test->rgba_map[R] = 2; test->rgba_map[A] = 3; break;
 477     }
 478
 479     return config_props(outlink);
 480 }
 481
 482 AVFilter avfilter_vsrc_rgbtestsrc = {
 483     .name          = "rgbtestsrc",
 484     .description   = NULL_IF_CONFIG_SMALL("Generate RGB test pattern."),
 485     .priv_size     = sizeof(TestSourceContext),
 486     .init          = rgbtest_init,
 487
 488     .query_formats = rgbtest_query_formats,
 489
 490     .inputs    = (AVFilterPad[]) {{ .name = NULL}},
 491
 492     .outputs   = (AVFilterPad[]) {{ .name = "default",
 493                                     .type = AVMEDIA_TYPE_VIDEO,
 494                                     .request_frame = request_frame,
 495                                     .config_props  = rgbtest_config_props, },
 496                                   { .name = NULL }},
 497 };
 498
 499 #endif /* CONFIG_RGBTESTSRC_FILTER */