vsrc_testsrc.c
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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 
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;
46  int64_t pts, max_pts;
47  char *size;
48  char *rate;
49  char *duration;
51 
52  void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
53 
54  /* only used by rgbtest */
55  int rgba_map[4];
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 
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[] = {
350  };
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[] = {
461  };
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 */