FFmpeg  4.0
xcbgrab.c
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1 /*
2  * XCB input grabber
3  * Copyright (C) 2014 Luca Barbato <lu_zero@gentoo.org>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 
24 #include <stdlib.h>
25 #include <xcb/xcb.h>
26 
27 #if CONFIG_LIBXCB_XFIXES
28 #include <xcb/xfixes.h>
29 #endif
30 
31 #if CONFIG_LIBXCB_SHM
32 #include <sys/shm.h>
33 #include <xcb/shm.h>
34 #endif
35 
36 #if CONFIG_LIBXCB_SHAPE
37 #include <xcb/shape.h>
38 #endif
39 
40 #include "libavutil/internal.h"
41 #include "libavutil/mathematics.h"
42 #include "libavutil/opt.h"
43 #include "libavutil/parseutils.h"
44 #include "libavutil/time.h"
45 
46 #include "libavformat/avformat.h"
47 #include "libavformat/internal.h"
48 
49 typedef struct XCBGrabContext {
50  const AVClass *class;
51 
53 
54  xcb_connection_t *conn;
55  xcb_screen_t *screen;
56  xcb_window_t window;
57 #if CONFIG_LIBXCB_SHM
58  xcb_shm_seg_t segment;
59 #endif
60  int64_t time_frame;
62 
63  int x, y;
64  int width, height;
66  int bpp;
67 
72  int centered;
73 
74  const char *video_size;
75  const char *framerate;
76 
77  int has_shm;
79 
80 #define FOLLOW_CENTER -1
81 
82 #define OFFSET(x) offsetof(XCBGrabContext, x)
83 #define D AV_OPT_FLAG_DECODING_PARAM
84 static const AVOption options[] = {
85  { "x", "Initial x coordinate.", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
86  { "y", "Initial y coordinate.", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
87  { "grab_x", "Initial x coordinate.", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
88  { "grab_y", "Initial y coordinate.", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
89  { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "vga" }, 0, 0, D },
90  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc" }, 0, 0, D },
91  { "draw_mouse", "Draw the mouse pointer.", OFFSET(draw_mouse), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
92  { "follow_mouse", "Move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region.",
93  OFFSET(follow_mouse), AV_OPT_TYPE_INT, { .i64 = 0 }, FOLLOW_CENTER, INT_MAX, D, "follow_mouse" },
94  { "centered", "Keep the mouse pointer at the center of grabbing region when following.", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, D, "follow_mouse" },
95  { "show_region", "Show the grabbing region.", OFFSET(show_region), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D },
96  { "region_border", "Set the region border thickness.", OFFSET(region_border), AV_OPT_TYPE_INT, { .i64 = 3 }, 1, 128, D },
97  { NULL },
98 };
99 
100 static const AVClass xcbgrab_class = {
101  .class_name = "xcbgrab indev",
102  .item_name = av_default_item_name,
103  .option = options,
104  .version = LIBAVUTIL_VERSION_INT,
106 };
107 
109  xcb_query_pointer_reply_t *p,
110  xcb_get_geometry_reply_t *geo)
111 {
112  XCBGrabContext *c = s->priv_data;
113  int x = c->x, y = c->y;
114  int w = c->width, h = c->height, f = c->follow_mouse;
115  int p_x, p_y;
116 
117  if (!p || !geo)
118  return AVERROR(EIO);
119 
120  p_x = p->win_x;
121  p_y = p->win_y;
122 
123  if (f == FOLLOW_CENTER) {
124  x = p_x - w / 2;
125  y = p_y - h / 2;
126  } else {
127  int left = x + f;
128  int right = x + w - f;
129  int top = y + f;
130  int bottom = y + h + f;
131  if (p_x > right) {
132  x += p_x - right;
133  } else if (p_x < left) {
134  x -= left - p_x;
135  }
136  if (p_y > bottom) {
137  y += p_y - bottom;
138  } else if (p_y < top) {
139  y -= top - p_y;
140  }
141  }
142 
143  c->x = FFMIN(FFMAX(0, x), geo->width - w);
144  c->y = FFMIN(FFMAX(0, y), geo->height - h);
145 
146  return 0;
147 }
148 
150 {
151  XCBGrabContext *c = s->priv_data;
152  xcb_get_image_cookie_t iq;
153  xcb_get_image_reply_t *img;
154  xcb_drawable_t drawable = c->screen->root;
155  xcb_generic_error_t *e = NULL;
156  uint8_t *data;
157  int length, ret;
158 
159  iq = xcb_get_image(c->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable,
160  c->x, c->y, c->width, c->height, ~0);
161 
162  img = xcb_get_image_reply(c->conn, iq, &e);
163 
164  if (e) {
165  av_log(s, AV_LOG_ERROR,
166  "Cannot get the image data "
167  "event_error: response_type:%u error_code:%u "
168  "sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
169  e->response_type, e->error_code,
170  e->sequence, e->resource_id, e->minor_code, e->major_code);
171  return AVERROR(EACCES);
172  }
173 
174  if (!img)
175  return AVERROR(EAGAIN);
176 
177  data = xcb_get_image_data(img);
178  length = xcb_get_image_data_length(img);
179 
180  ret = av_new_packet(pkt, length);
181 
182  if (!ret)
183  memcpy(pkt->data, data, length);
184 
185  free(img);
186 
187  return ret;
188 }
189 
191 {
192  XCBGrabContext *c = s->priv_data;
193  int64_t curtime, delay;
194  int64_t frame_time = av_rescale_q(1, c->time_base, AV_TIME_BASE_Q);
195 
196  c->time_frame += frame_time;
197 
198  for (;;) {
199  curtime = av_gettime();
200  delay = c->time_frame - curtime;
201  if (delay <= 0)
202  break;
203  av_usleep(delay);
204  }
205 
206  pkt->pts = curtime;
207 }
208 
209 #if CONFIG_LIBXCB_SHM
210 static int check_shm(xcb_connection_t *conn)
211 {
212  xcb_shm_query_version_cookie_t cookie = xcb_shm_query_version(conn);
213  xcb_shm_query_version_reply_t *reply;
214 
215  reply = xcb_shm_query_version_reply(conn, cookie, NULL);
216  if (reply) {
217  free(reply);
218  return 1;
219  }
220 
221  return 0;
222 }
223 
224 static int allocate_shm(AVFormatContext *s)
225 {
226  XCBGrabContext *c = s->priv_data;
228  uint8_t *data;
229  int id;
230 
231  if (c->buffer)
232  return 0;
233  id = shmget(IPC_PRIVATE, size, IPC_CREAT | 0777);
234  if (id == -1) {
235  char errbuf[1024];
236  int err = AVERROR(errno);
237  av_strerror(err, errbuf, sizeof(errbuf));
238  av_log(s, AV_LOG_ERROR, "Cannot get %d bytes of shared memory: %s.\n",
239  size, errbuf);
240  return err;
241  }
242  xcb_shm_attach(c->conn, c->segment, id, 0);
243  data = shmat(id, NULL, 0);
244  shmctl(id, IPC_RMID, 0);
245  if ((intptr_t)data == -1 || !data)
246  return AVERROR(errno);
247  c->buffer = data;
248  return 0;
249 }
250 
251 static int xcbgrab_frame_shm(AVFormatContext *s, AVPacket *pkt)
252 {
253  XCBGrabContext *c = s->priv_data;
254  xcb_shm_get_image_cookie_t iq;
255  xcb_shm_get_image_reply_t *img;
256  xcb_drawable_t drawable = c->screen->root;
257  xcb_generic_error_t *e = NULL;
258  int ret;
259 
260  ret = allocate_shm(s);
261  if (ret < 0)
262  return ret;
263 
264  iq = xcb_shm_get_image(c->conn, drawable,
265  c->x, c->y, c->width, c->height, ~0,
266  XCB_IMAGE_FORMAT_Z_PIXMAP, c->segment, 0);
267  img = xcb_shm_get_image_reply(c->conn, iq, &e);
268 
269  xcb_flush(c->conn);
270 
271  if (e) {
272  av_log(s, AV_LOG_ERROR,
273  "Cannot get the image data "
274  "event_error: response_type:%u error_code:%u "
275  "sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
276  e->response_type, e->error_code,
277  e->sequence, e->resource_id, e->minor_code, e->major_code);
278 
279  return AVERROR(EACCES);
280  }
281 
282  free(img);
283 
284  pkt->data = c->buffer;
285  pkt->size = c->frame_size;
286 
287  return 0;
288 }
289 #endif /* CONFIG_LIBXCB_SHM */
290 
291 #if CONFIG_LIBXCB_XFIXES
292 static int check_xfixes(xcb_connection_t *conn)
293 {
294  xcb_xfixes_query_version_cookie_t cookie;
295  xcb_xfixes_query_version_reply_t *reply;
296 
297  cookie = xcb_xfixes_query_version(conn, XCB_XFIXES_MAJOR_VERSION,
298  XCB_XFIXES_MINOR_VERSION);
299  reply = xcb_xfixes_query_version_reply(conn, cookie, NULL);
300 
301  if (reply) {
302  free(reply);
303  return 1;
304  }
305  return 0;
306 }
307 
308 #define BLEND(target, source, alpha) \
309  (target) + ((source) * (255 - (alpha)) + 255 / 2) / 255
310 
311 static void xcbgrab_draw_mouse(AVFormatContext *s, AVPacket *pkt,
312  xcb_query_pointer_reply_t *p,
313  xcb_get_geometry_reply_t *geo)
314 {
315  XCBGrabContext *gr = s->priv_data;
316  uint32_t *cursor;
317  uint8_t *image = pkt->data;
318  int stride = gr->bpp / 8;
319  xcb_xfixes_get_cursor_image_cookie_t cc;
320  xcb_xfixes_get_cursor_image_reply_t *ci;
321  int cx, cy, x, y, w, h, c_off, i_off;
322 
323  cc = xcb_xfixes_get_cursor_image(gr->conn);
324  ci = xcb_xfixes_get_cursor_image_reply(gr->conn, cc, NULL);
325  if (!ci)
326  return;
327 
328  cursor = xcb_xfixes_get_cursor_image_cursor_image(ci);
329  if (!cursor)
330  return;
331 
332  cx = ci->x - ci->xhot;
333  cy = ci->y - ci->yhot;
334 
335  x = FFMAX(cx, gr->x);
336  y = FFMAX(cy, gr->y);
337 
338  w = FFMIN(cx + ci->width, gr->x + gr->width) - x;
339  h = FFMIN(cy + ci->height, gr->y + gr->height) - y;
340 
341  c_off = x - cx;
342  i_off = x - gr->x;
343 
344  cursor += (y - cy) * ci->width;
345  image += (y - gr->y) * gr->width * stride;
346 
347  for (y = 0; y < h; y++) {
348  cursor += c_off;
349  image += i_off * stride;
350  for (x = 0; x < w; x++, cursor++, image += stride) {
351  int r, g, b, a;
352 
353  r = *cursor & 0xff;
354  g = (*cursor >> 8) & 0xff;
355  b = (*cursor >> 16) & 0xff;
356  a = (*cursor >> 24) & 0xff;
357 
358  if (!a)
359  continue;
360 
361  if (a == 255) {
362  image[0] = r;
363  image[1] = g;
364  image[2] = b;
365  } else {
366  image[0] = BLEND(r, image[0], a);
367  image[1] = BLEND(g, image[1], a);
368  image[2] = BLEND(b, image[2], a);
369  }
370 
371  }
372  cursor += ci->width - w - c_off;
373  image += (gr->width - w - i_off) * stride;
374  }
375 
376  free(ci);
377 }
378 #endif /* CONFIG_LIBXCB_XFIXES */
379 
381 {
382  XCBGrabContext *c = s->priv_data;
383  const uint32_t args[] = { c->x - c->region_border,
384  c->y - c->region_border };
385 
386  xcb_configure_window(c->conn,
387  c->window,
388  XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y,
389  args);
390 }
391 
393 {
394  XCBGrabContext *c = s->priv_data;
395  xcb_query_pointer_cookie_t pc;
396  xcb_get_geometry_cookie_t gc;
397  xcb_query_pointer_reply_t *p = NULL;
398  xcb_get_geometry_reply_t *geo = NULL;
399  int ret = 0;
400 
401  wait_frame(s, pkt);
402 
403  if (c->follow_mouse || c->draw_mouse) {
404  pc = xcb_query_pointer(c->conn, c->screen->root);
405  gc = xcb_get_geometry(c->conn, c->screen->root);
406  p = xcb_query_pointer_reply(c->conn, pc, NULL);
407  geo = xcb_get_geometry_reply(c->conn, gc, NULL);
408  }
409 
410  if (c->follow_mouse && p->same_screen)
411  xcbgrab_reposition(s, p, geo);
412 
413  if (c->show_region)
415 
416 #if CONFIG_LIBXCB_SHM
417  if (c->has_shm && xcbgrab_frame_shm(s, pkt) < 0)
418  c->has_shm = 0;
419 #endif
420  if (!c->has_shm)
421  ret = xcbgrab_frame(s, pkt);
422 
423 #if CONFIG_LIBXCB_XFIXES
424  if (ret >= 0 && c->draw_mouse && p->same_screen)
425  xcbgrab_draw_mouse(s, pkt, p, geo);
426 #endif
427 
428  free(p);
429  free(geo);
430 
431  return ret;
432 }
433 
435 {
437 
438 #if CONFIG_LIBXCB_SHM
439  if (ctx->buffer) {
440  shmdt(ctx->buffer);
441  }
442 #endif
443 
444  xcb_disconnect(ctx->conn);
445 
446  return 0;
447 }
448 
449 static xcb_screen_t *get_screen(const xcb_setup_t *setup, int screen_num)
450 {
451  xcb_screen_iterator_t it = xcb_setup_roots_iterator(setup);
452  xcb_screen_t *screen = NULL;
453 
454  for (; it.rem > 0; xcb_screen_next (&it)) {
455  if (!screen_num) {
456  screen = it.data;
457  break;
458  }
459 
460  screen_num--;
461  }
462 
463  return screen;
464 }
465 
467  int *pix_fmt)
468 {
469  XCBGrabContext *c = s->priv_data;
470  const xcb_setup_t *setup = xcb_get_setup(c->conn);
471  const xcb_format_t *fmt = xcb_setup_pixmap_formats(setup);
472  int length = xcb_setup_pixmap_formats_length(setup);
473 
474  *pix_fmt = 0;
475 
476  while (length--) {
477  if (fmt->depth == depth) {
478  switch (depth) {
479  case 32:
480  if (fmt->bits_per_pixel == 32)
481  *pix_fmt = AV_PIX_FMT_0RGB;
482  break;
483  case 24:
484  if (fmt->bits_per_pixel == 32)
485  *pix_fmt = AV_PIX_FMT_0RGB32;
486  else if (fmt->bits_per_pixel == 24)
487  *pix_fmt = AV_PIX_FMT_RGB24;
488  break;
489  case 16:
490  if (fmt->bits_per_pixel == 16)
491  *pix_fmt = AV_PIX_FMT_RGB565;
492  break;
493  case 15:
494  if (fmt->bits_per_pixel == 16)
495  *pix_fmt = AV_PIX_FMT_RGB555;
496  break;
497  case 8:
498  if (fmt->bits_per_pixel == 8)
499  *pix_fmt = AV_PIX_FMT_RGB8;
500  break;
501  }
502  }
503 
504  if (*pix_fmt) {
505  c->bpp = fmt->bits_per_pixel;
506  c->frame_size = c->width * c->height * fmt->bits_per_pixel / 8;
507  return 0;
508  }
509 
510  fmt++;
511  }
512  avpriv_report_missing_feature(s, "Mapping this pixmap format");
513 
514  return AVERROR_PATCHWELCOME;
515 }
516 
518 {
519  XCBGrabContext *c = s->priv_data;
521  xcb_get_geometry_cookie_t gc;
522  xcb_get_geometry_reply_t *geo;
523  int ret;
524 
525  if (!st)
526  return AVERROR(ENOMEM);
527 
528  ret = av_parse_video_size(&c->width, &c->height, c->video_size);
529  if (ret < 0)
530  return ret;
531 
533  if (ret < 0)
534  return ret;
535 
536  avpriv_set_pts_info(st, 64, 1, 1000000);
537 
538  gc = xcb_get_geometry(c->conn, c->screen->root);
539  geo = xcb_get_geometry_reply(c->conn, gc, NULL);
540 
541  if (c->x + c->width > geo->width ||
542  c->y + c->height > geo->height) {
543  av_log(s, AV_LOG_ERROR,
544  "Capture area %dx%d at position %d.%d "
545  "outside the screen size %dx%d\n",
546  c->width, c->height,
547  c->x, c->y,
548  geo->width, geo->height);
549  return AVERROR(EINVAL);
550  }
551 
553  st->avg_frame_rate.num };
554  c->time_frame = av_gettime();
555 
558  st->codecpar->width = c->width;
559  st->codecpar->height = c->height;
560 
561  ret = pixfmt_from_pixmap_format(s, geo->depth, &st->codecpar->format);
562 
563  free(geo);
564 
565  return ret;
566 }
567 
569 {
570  XCBGrabContext *c = s->priv_data;
571  xcb_gcontext_t gc = xcb_generate_id(c->conn);
572  uint32_t mask = XCB_GC_FOREGROUND |
573  XCB_GC_BACKGROUND |
574  XCB_GC_LINE_WIDTH |
575  XCB_GC_LINE_STYLE |
576  XCB_GC_FILL_STYLE;
577  uint32_t values[] = { c->screen->black_pixel,
578  c->screen->white_pixel,
579  c->region_border,
580  XCB_LINE_STYLE_DOUBLE_DASH,
581  XCB_FILL_STYLE_SOLID };
582  xcb_rectangle_t r = { 1, 1,
583  c->width + c->region_border * 2 - 3,
584  c->height + c->region_border * 2 - 3 };
585 
586  xcb_create_gc(c->conn, gc, c->window, mask, values);
587 
588  xcb_poly_rectangle(c->conn, c->window, gc, 1, &r);
589 }
590 
592 {
593  XCBGrabContext *c = s->priv_data;
594  uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
595  uint32_t values[] = { 1,
596  XCB_EVENT_MASK_EXPOSURE |
597  XCB_EVENT_MASK_STRUCTURE_NOTIFY };
598  av_unused xcb_rectangle_t rect = { 0, 0, c->width, c->height };
599 
600  c->window = xcb_generate_id(c->conn);
601 
602  xcb_create_window(c->conn, XCB_COPY_FROM_PARENT,
603  c->window,
604  c->screen->root,
605  c->x - c->region_border,
606  c->y - c->region_border,
607  c->width + c->region_border * 2,
608  c->height + c->region_border * 2,
609  0,
610  XCB_WINDOW_CLASS_INPUT_OUTPUT,
611  XCB_COPY_FROM_PARENT,
612  mask, values);
613 
614 #if CONFIG_LIBXCB_SHAPE
615  xcb_shape_rectangles(c->conn, XCB_SHAPE_SO_SUBTRACT,
616  XCB_SHAPE_SK_BOUNDING, XCB_CLIP_ORDERING_UNSORTED,
617  c->window,
619  1, &rect);
620 #endif
621 
622  xcb_map_window(c->conn, c->window);
623 
624  draw_rectangle(s);
625 }
626 
628 {
629  XCBGrabContext *c = s->priv_data;
630  int screen_num, ret;
631  const xcb_setup_t *setup;
632  char *display_name = av_strdup(s->url);
633 
634  if (!display_name)
635  return AVERROR(ENOMEM);
636 
637  if (!sscanf(s->url, "%[^+]+%d,%d", display_name, &c->x, &c->y)) {
638  *display_name = 0;
639  sscanf(s->url, "+%d,%d", &c->x, &c->y);
640  }
641 
642  c->conn = xcb_connect(display_name[0] ? display_name : NULL, &screen_num);
643  av_freep(&display_name);
644 
645  if ((ret = xcb_connection_has_error(c->conn))) {
646  av_log(s, AV_LOG_ERROR, "Cannot open display %s, error %d.\n",
647  s->url[0] ? s->url : "default", ret);
648  return AVERROR(EIO);
649  }
650 
651  setup = xcb_get_setup(c->conn);
652 
653  c->screen = get_screen(setup, screen_num);
654  if (!c->screen) {
655  av_log(s, AV_LOG_ERROR, "The screen %d does not exist.\n",
656  screen_num);
658  return AVERROR(EIO);
659  }
660 
661  ret = create_stream(s);
662 
663  if (ret < 0) {
665  return ret;
666  }
667 
668 #if CONFIG_LIBXCB_SHM
669  if ((c->has_shm = check_shm(c->conn)))
670  c->segment = xcb_generate_id(c->conn);
671 #endif
672 
673 #if CONFIG_LIBXCB_XFIXES
674  if (c->draw_mouse) {
675  if (!(c->draw_mouse = check_xfixes(c->conn))) {
677  "XFixes not available, cannot draw the mouse.\n");
678  }
679  if (c->bpp < 24) {
680  avpriv_report_missing_feature(s, "%d bits per pixel screen",
681  c->bpp);
682  c->draw_mouse = 0;
683  }
684  }
685 #endif
686 
687  if (c->show_region)
688  setup_window(s);
689 
690  return 0;
691 }
692 
694  .name = "x11grab",
695  .long_name = NULL_IF_CONFIG_SMALL("X11 screen capture, using XCB"),
696  .priv_data_size = sizeof(XCBGrabContext),
700  .flags = AVFMT_NOFILE,
701  .priv_class = &xcbgrab_class,
702 };
static xcb_screen_t * get_screen(const xcb_setup_t *setup, int screen_num)
Definition: xcbgrab.c:449
AVInputFormat ff_xcbgrab_demuxer
Definition: xcbgrab.c:693
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
xcb_connection_t * conn
Definition: xcbgrab.c:54
static enum AVPixelFormat pix_fmt
static av_cold int xcbgrab_read_header(AVFormatContext *s)
Definition: xcbgrab.c:627
int size
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:179
static int create_stream(AVFormatContext *s)
Definition: xcbgrab.c:517
AVOption.
Definition: opt.h:246
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:148
static void xcbgrab_update_region(AVFormatContext *s)
Definition: xcbgrab.c:380
const char * fmt
Definition: avisynth_c.h:769
uint8_t * buffer
Definition: xcbgrab.c:52
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4811
const char * g
Definition: vf_curves.c:112
static void draw_rectangle(AVFormatContext *s)
Definition: xcbgrab.c:568
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1431
const char * b
Definition: vf_curves.c:113
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
xcb_window_t window
Definition: xcbgrab.c:56
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
static AVPacket pkt
int stride
Definition: mace.c:144
int centered
Definition: xcbgrab.c:72
Format I/O context.
Definition: avformat.h:1342
#define img
int frame_size
Definition: xcbgrab.c:65
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
uint8_t
#define av_cold
Definition: attributes.h:82
int width
Video only.
Definition: avcodec.h:3950
AVOptions.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4441
static const AVClass xcbgrab_class
Definition: xcbgrab.c:100
xcb_screen_t * screen
Definition: xcbgrab.c:55
const char data[16]
Definition: mxf.c:90
uint8_t * data
Definition: avcodec.h:1430
static int xcbgrab_frame(AVFormatContext *s, AVPacket *pkt)
Definition: xcbgrab.c:149
static int flags
Definition: log.c:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define av_log(a,...)
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
static int pixfmt_from_pixmap_format(AVFormatContext *s, int depth, int *pix_fmt)
Definition: xcbgrab.c:466
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
AVRational time_base
Definition: xcbgrab.c:61
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const uint16_t mask[17]
Definition: lzw.c:38
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
char * url
input or output URL.
Definition: avformat.h:1438
const char * r
Definition: vf_curves.c:111
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
#define FFMAX(a, b)
Definition: common.h:94
Definition: hls.c:68
common internal API header
#define FFMIN(a, b)
Definition: common.h:96
static const AVOption options[]
Definition: xcbgrab.c:84
const char * framerate
Definition: xcbgrab.c:75
uint8_t w
Definition: llviddspenc.c:38
const char AVS_Value args
Definition: avisynth_c.h:780
AVFormatContext * ctx
Definition: movenc.c:48
static void wait_frame(AVFormatContext *s, AVPacket *pkt)
Definition: xcbgrab.c:190
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:873
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int64_t time_frame
Definition: xcbgrab.c:60
const char * video_size
Definition: xcbgrab.c:74
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int show_region
Definition: xcbgrab.c:70
Describe the class of an AVClass context structure.
Definition: log.h:67
Definition: f_ebur128.c:91
static int xcbgrab_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: xcbgrab.c:392
Rational number (pair of numerator and denominator).
Definition: rational.h:58
misc parsing utilities
#define OFFSET(x)
Definition: xcbgrab.c:82
static void setup_window(AVFormatContext *s)
Definition: xcbgrab.c:591
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:105
static int xcbgrab_reposition(AVFormatContext *s, xcb_query_pointer_reply_t *p, xcb_get_geometry_reply_t *geo)
Definition: xcbgrab.c:108
Main libavformat public API header.
#define D
Definition: xcbgrab.c:83
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
static double c[64]
int region_border
Definition: xcbgrab.c:71
static av_cold int xcbgrab_read_close(AVFormatContext *s)
Definition: xcbgrab.c:434
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:82
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:356
int den
Denominator.
Definition: rational.h:60
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
int follow_mouse
Definition: xcbgrab.c:69
void * priv_data
Format private data.
Definition: avformat.h:1370
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:355
int draw_mouse
Definition: xcbgrab.c:68
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
#define FOLLOW_CENTER
Definition: xcbgrab.c:80
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
const char int length
Definition: avisynth_c.h:768
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:233
enum AVCodecID id
This structure stores compressed data.
Definition: avcodec.h:1407
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
#define av_unused
Definition: attributes.h:125
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:346