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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
49typedef struct XCBGrabContext {
50 const AVClass *class;
51
52 uint8_t *buffer;
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;
61 AVRational time_base;
62
63 int x, y;
64 int width, height;
65 int frame_size;
66 int bpp;
67
68 int draw_mouse;
69 int follow_mouse;
70 int show_region;
71 int region_border;
72 int centered;
73
74 const char *video_size;
75 const char *framerate;
76
77 int has_shm;
78} XCBGrabContext;
79
80#define FOLLOW_CENTER -1
81
82#define OFFSET(x) offsetof(XCBGrabContext, x)
83#define D AV_OPT_FLAG_DECODING_PARAM
84static 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
100static const AVClass xcbgrab_class = {
101 .class_name = "xcbgrab indev",
102 .item_name = av_default_item_name,
103 .option = options,
104 .version = LIBAVUTIL_VERSION_INT,
105 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
106};
107
108static int xcbgrab_reposition(AVFormatContext *s,
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
149static int xcbgrab_frame(AVFormatContext *s, AVPacket *pkt)
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
190static void wait_frame(AVFormatContext *s, AVPacket *pkt)
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
210static 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
224static int allocate_shm(AVFormatContext *s)
225{
226 XCBGrabContext *c = s->priv_data;
227 int size = c->frame_size + AV_INPUT_BUFFER_PADDING_SIZE;
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
251static 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
292static 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
311static 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
380static void xcbgrab_update_region(AVFormatContext *s)
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
392static int xcbgrab_read_packet(AVFormatContext *s, AVPacket *pkt)
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)
414 xcbgrab_update_region(s);
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
434static av_cold int xcbgrab_read_close(AVFormatContext *s)
435{
436 XCBGrabContext *ctx = s->priv_data;
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
449static 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
466static int pixfmt_from_pixmap_format(AVFormatContext *s, int depth,
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
517static int create_stream(AVFormatContext *s)
518{
519 XCBGrabContext *c = s->priv_data;
520 AVStream *st = avformat_new_stream(s, NULL);
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
532 ret = av_parse_video_rate(&st->avg_frame_rate, c->framerate);
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
552 c->time_base = (AVRational){ st->avg_frame_rate.den,
553 st->avg_frame_rate.num };
554 c->time_frame = av_gettime();
555
556 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
557 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
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
568static void draw_rectangle(AVFormatContext *s)
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
591static void setup_window(AVFormatContext *s)
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,
618 c->region_border, c->region_border,
619 1, &rect);
620#endif
621
622 xcb_map_window(c->conn, c->window);
623
624 draw_rectangle(s);
625}
626
627static av_cold int xcbgrab_read_header(AVFormatContext *s)
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->filename);
633
634 if (!display_name)
635 return AVERROR(ENOMEM);
636
637 if (!sscanf(s->filename, "%[^+]+%d,%d", display_name, &c->x, &c->y)) {
638 *display_name = 0;
639 sscanf(s->filename, "+%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->filename[0] ? s->filename : "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);
657 xcbgrab_read_close(s);
658 return AVERROR(EIO);
659 }
660
661 ret = create_stream(s);
662
663 if (ret < 0) {
664 xcbgrab_read_close(s);
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))) {
676 av_log(s, AV_LOG_WARNING,
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
693AVInputFormat ff_xcbgrab_demuxer = {
694 .name = "x11grab",
695 .long_name = NULL_IF_CONFIG_SMALL("X11 screen capture, using XCB"),
696 .priv_data_size = sizeof(XCBGrabContext),
697 .read_header = xcbgrab_read_header,
698 .read_packet = xcbgrab_read_packet,
699 .read_close = xcbgrab_read_close,
700 .flags = AVFMT_NOFILE,
701 .priv_class = &xcbgrab_class,
702};
703
generated by cgit at 2024-05-17 02:05:23 (GMT)