28 #if CONFIG_LIBXCB_XFIXES
29 #include <xcb/xfixes.h>
37 #if CONFIG_LIBXCB_SHAPE
38 #include <xcb/shape.h>
81 #define FOLLOW_CENTER -1
83 #define OFFSET(x) offsetof(XCBGrabContext, x)
84 #define D AV_OPT_FLAG_DECODING_PARAM
86 {
"window_id",
"Window to capture.",
OFFSET(window_id),
AV_OPT_TYPE_INT, { .i64 = XCB_NONE }, 0, UINT32_MAX,
D },
94 {
"follow_mouse",
"Move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region.",
96 {
"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" },
97 {
"show_region",
"Show the grabbing region.",
OFFSET(show_region),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1,
D },
98 {
"region_border",
"Set the region border thickness.",
OFFSET(region_border),
AV_OPT_TYPE_INT, { .i64 = 3 }, 1, 128,
D },
112 xcb_query_pointer_reply_t *p,
113 xcb_get_geometry_reply_t *geo)
116 int x =
c->x, y =
c->y;
117 int w =
c->width,
h =
c->height,
f =
c->follow_mouse;
131 int right = x +
w -
f;
133 int bottom = y +
h -
f;
136 }
else if (p_x < left) {
141 }
else if (p_y < top) {
160 xcb_get_image_cookie_t iq;
161 xcb_get_image_reply_t *
img;
162 xcb_drawable_t drawable =
c->window_id;
163 xcb_generic_error_t *e =
NULL;
167 iq = xcb_get_image(
c->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable,
168 c->x,
c->y,
c->width,
c->height, ~0);
170 img = xcb_get_image_reply(
c->conn, iq, &e);
174 "Cannot get the image data "
175 "event_error: response_type:%u error_code:%u "
176 "sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
177 e->response_type, e->error_code,
178 e->sequence, e->resource_id, e->minor_code, e->major_code);
186 data = xcb_get_image_data(
img);
187 length = xcb_get_image_data_length(
img);
204 int64_t curtime, delay;
206 c->time_frame +=
c->frame_duration;
210 delay =
c->time_frame - curtime;
219 #if CONFIG_LIBXCB_SHM
220 static int check_shm(xcb_connection_t *conn)
222 xcb_shm_query_version_cookie_t cookie = xcb_shm_query_version(conn);
223 xcb_shm_query_version_reply_t *reply;
225 reply = xcb_shm_query_version_reply(conn, cookie,
NULL);
234 static void free_shm_buffer(
void *opaque,
uint8_t *
data)
241 xcb_connection_t *conn = opaque;
247 id = shmget(IPC_PRIVATE,
size, IPC_CREAT | 0777);
251 segment = xcb_generate_id(conn);
252 xcb_shm_attach(conn,
segment,
id, 0);
254 shmctl(
id, IPC_RMID, 0);
268 xcb_shm_get_image_cookie_t iq;
269 xcb_shm_get_image_reply_t *
img;
270 xcb_drawable_t drawable =
c->window_id;
271 xcb_generic_error_t *e =
NULL;
282 iq = xcb_shm_get_image(
c->conn, drawable,
283 c->x,
c->y,
c->width,
c->height, ~0,
284 XCB_IMAGE_FORMAT_Z_PIXMAP,
segment, 0);
285 img = xcb_shm_get_image_reply(
c->conn, iq, &e);
291 "Cannot get the image data "
292 "event_error: response_type:%u error_code:%u "
293 "sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
294 e->response_type, e->error_code,
295 e->sequence, e->resource_id, e->minor_code, e->major_code);
312 #if CONFIG_LIBXCB_XFIXES
313 static int check_xfixes(xcb_connection_t *conn)
315 xcb_xfixes_query_version_cookie_t cookie;
316 xcb_xfixes_query_version_reply_t *reply;
318 cookie = xcb_xfixes_query_version(conn, XCB_XFIXES_MAJOR_VERSION,
319 XCB_XFIXES_MINOR_VERSION);
320 reply = xcb_xfixes_query_version_reply(conn, cookie,
NULL);
329 #define BLEND(target, source, alpha) \
330 (target) + ((source) * (255 - (alpha)) + 255 / 2) / 255
333 xcb_query_pointer_reply_t *p,
334 xcb_get_geometry_reply_t *geo,
335 int win_x,
int win_y)
341 xcb_xfixes_get_cursor_image_cookie_t cc;
342 xcb_xfixes_get_cursor_image_reply_t *ci;
343 int cx, cy, x, y,
w,
h, c_off, i_off;
345 cc = xcb_xfixes_get_cursor_image(gr->
conn);
346 ci = xcb_xfixes_get_cursor_image_reply(gr->
conn, cc,
NULL);
350 cursor = xcb_xfixes_get_cursor_image_cursor_image(ci);
354 cx = ci->x - ci->xhot;
355 cy = ci->y - ci->yhot;
357 x =
FFMAX(cx, win_x + gr->
x);
358 y =
FFMAX(cy, win_y + gr->
y);
360 w =
FFMIN(cx + ci->width, win_x + gr->
x + gr->
width) - x;
364 i_off = x - gr->
x - win_x;
366 cursor += (y - cy) * ci->width;
369 for (y = 0; y <
h; y++) {
372 for (x = 0; x <
w; x++, cursor++, image +=
stride) {
376 g = (*cursor >> 8) & 0xff;
377 b = (*cursor >> 16) & 0xff;
378 a = (*cursor >> 24) & 0xff;
388 image[0] = BLEND(
r, image[0],
a);
389 image[1] = BLEND(
g, image[1],
a);
390 image[2] = BLEND(
b, image[2],
a);
394 cursor += ci->width -
w - c_off;
405 const uint32_t args[] = { win_x +
c->x -
c->region_border,
406 win_y +
c->y -
c->region_border };
408 xcb_configure_window(
c->conn,
410 XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y,
417 xcb_query_pointer_cookie_t pc;
418 xcb_get_geometry_cookie_t gc;
419 xcb_translate_coordinates_cookie_t
tc;
420 xcb_query_pointer_reply_t *p =
NULL;
421 xcb_get_geometry_reply_t *geo =
NULL;
422 xcb_translate_coordinates_reply_t *translate =
NULL;
425 int win_x = 0, win_y = 0;
430 if (
c->follow_mouse ||
c->draw_mouse) {
431 pc = xcb_query_pointer(
c->conn,
c->window_id);
432 gc = xcb_get_geometry(
c->conn,
c->window_id);
433 p = xcb_query_pointer_reply(
c->conn, pc,
NULL);
438 geo = xcb_get_geometry_reply(
c->conn, gc,
NULL);
445 if (
c->window_id !=
c->screen->root) {
446 tc = xcb_translate_coordinates(
c->conn,
c->window_id,
c->screen->root, 0, 0);
447 translate = xcb_translate_coordinates_reply(
c->conn,
tc,
NULL);
454 win_x = translate->dst_x;
455 win_y = translate->dst_y;
459 if (
c->follow_mouse && p->same_screen)
465 #if CONFIG_LIBXCB_SHM
466 if (
c->has_shm && xcbgrab_frame_shm(
s,
pkt) < 0) {
476 #if CONFIG_LIBXCB_XFIXES
477 if (ret >= 0 &&
c->draw_mouse && p->same_screen)
478 xcbgrab_draw_mouse(
s,
pkt, p, geo, win_x, win_y);
491 #if CONFIG_LIBXCB_SHM
495 xcb_disconnect(
ctx->conn);
500 static xcb_screen_t *
get_screen(
const xcb_setup_t *setup,
int screen_num)
502 xcb_screen_iterator_t it = xcb_setup_roots_iterator(setup);
503 xcb_screen_t *screen =
NULL;
505 for (; it.rem > 0; xcb_screen_next (&it)) {
521 const xcb_setup_t *setup = xcb_get_setup(
c->conn);
522 const xcb_format_t *fmt = xcb_setup_pixmap_formats(setup);
523 int length = xcb_setup_pixmap_formats_length(setup);
528 if (fmt->depth == depth) {
531 if (fmt->bits_per_pixel == 32)
532 *
pix_fmt = setup->image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST ?
536 if (fmt->bits_per_pixel == 32)
537 *
pix_fmt = setup->image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST ?
539 else if (fmt->bits_per_pixel == 24)
540 *
pix_fmt = setup->image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST ?
544 if (fmt->bits_per_pixel == 16)
545 *
pix_fmt = setup->image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST ?
549 if (fmt->bits_per_pixel == 16)
550 *
pix_fmt = setup->image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST ?
554 if (fmt->bits_per_pixel == 8)
561 *bpp = fmt->bits_per_pixel;
576 xcb_get_geometry_cookie_t gc;
577 xcb_get_geometry_reply_t *geo;
578 int64_t frame_size_bits;
590 gc = xcb_get_geometry(
c->conn,
c->window_id);
591 geo = xcb_get_geometry_reply(
c->conn, gc,
NULL);
597 if (!
c->width || !
c->height) {
598 c->width = geo->width;
599 c->height = geo->height;
602 if (
c->x +
c->width > geo->width ||
603 c->y +
c->height > geo->height) {
605 "Capture area %dx%d at position %d.%d "
606 "outside the screen size %dx%d\n",
609 geo->width, geo->height);
624 frame_size_bits = (int64_t)
c->width *
c->height *
c->bpp;
629 c->frame_size = frame_size_bits / 8;
631 #if CONFIG_LIBXCB_SHM
633 c->conn, allocate_shm_buffer,
NULL);
650 xcb_gcontext_t gc = xcb_generate_id(
c->conn);
651 uint32_t
mask = XCB_GC_FOREGROUND |
656 uint32_t values[] = {
c->screen->black_pixel,
657 c->screen->white_pixel,
659 XCB_LINE_STYLE_DOUBLE_DASH,
660 XCB_FILL_STYLE_SOLID };
661 xcb_rectangle_t
r = { 1, 1,
662 c->width +
c->region_border * 2 - 3,
663 c->height +
c->region_border * 2 - 3 };
665 xcb_create_gc(
c->conn, gc,
c->window,
mask, values);
667 xcb_poly_rectangle(
c->conn,
c->window, gc, 1, &
r);
673 uint32_t
mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
674 uint32_t values[] = { 1,
675 XCB_EVENT_MASK_EXPOSURE |
676 XCB_EVENT_MASK_STRUCTURE_NOTIFY };
679 c->window = xcb_generate_id(
c->conn);
681 xcb_create_window(
c->conn, XCB_COPY_FROM_PARENT,
684 c->x -
c->region_border,
685 c->y -
c->region_border,
686 c->width +
c->region_border * 2,
687 c->height +
c->region_border * 2,
689 XCB_WINDOW_CLASS_INPUT_OUTPUT,
690 XCB_COPY_FROM_PARENT,
693 #if CONFIG_LIBXCB_SHAPE
694 xcb_shape_rectangles(
c->conn, XCB_SHAPE_SO_SUBTRACT,
695 XCB_SHAPE_SK_BOUNDING, XCB_CLIP_ORDERING_UNSORTED,
697 c->region_border,
c->region_border,
701 xcb_map_window(
c->conn,
c->window);
706 #define CROSSHAIR_CURSOR 34
709 xcb_point_t *corner_b)
711 xcb_rectangle_t rectangle;
712 rectangle.x =
FFMIN(corner_a->x, corner_b->x);
713 rectangle.y =
FFMIN(corner_a->y, corner_b->y);
714 rectangle.width =
FFABS(corner_a->x - corner_b->x);
715 rectangle.height =
FFABS(corner_a->y - corner_b->y);
722 xcb_connection_t *conn =
c->conn;
723 xcb_screen_t *screen =
c->screen;
725 int ret = 0, done = 0, was_pressed = 0;
727 xcb_font_t cursor_font;
728 xcb_point_t press_position;
729 xcb_generic_event_t *event;
730 xcb_rectangle_t rectangle = { 0 };
731 xcb_grab_pointer_reply_t *reply;
732 xcb_grab_pointer_cookie_t cookie;
734 xcb_window_t root_window = screen->root;
735 xcb_gcontext_t gc = xcb_generate_id(conn);
736 uint32_t
mask = XCB_GC_FUNCTION | XCB_GC_SUBWINDOW_MODE;
737 uint32_t values[] = { XCB_GX_INVERT, XCB_SUBWINDOW_MODE_INCLUDE_INFERIORS };
738 xcb_create_gc(conn, gc, root_window,
mask, values);
740 cursor_font = xcb_generate_id(conn);
741 xcb_open_font(conn, cursor_font, strlen(
"cursor"),
"cursor");
742 cursor = xcb_generate_id(conn);
743 xcb_create_glyph_cursor(conn, cursor, cursor_font, cursor_font,
745 0xFFFF, 0xFFFF, 0xFFFF);
746 cookie = xcb_grab_pointer(conn, 0, root_window,
747 XCB_EVENT_MASK_BUTTON_PRESS |
748 XCB_EVENT_MASK_BUTTON_RELEASE |
749 XCB_EVENT_MASK_BUTTON_MOTION,
750 XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC,
751 root_window, cursor, XCB_CURRENT_TIME);
752 reply = xcb_grab_pointer_reply(conn, cookie,
NULL);
753 if (!reply || reply->status != XCB_GRAB_STATUS_SUCCESS) {
755 "Failed to select region. Could not grab pointer.\n");
762 xcb_grab_server(conn);
764 while (!done && (event = xcb_wait_for_event(conn))) {
765 switch (event->response_type & ~0x80) {
766 case XCB_BUTTON_PRESS: {
767 xcb_button_press_event_t *press = (xcb_button_press_event_t *)event;
768 press_position = (xcb_point_t){ press->event_x, press->event_y };
769 rectangle.x = press_position.x;
770 rectangle.y = press_position.y;
771 xcb_poly_rectangle(conn, root_window, gc, 1, &rectangle);
775 case XCB_MOTION_NOTIFY: {
777 xcb_motion_notify_event_t *motion =
778 (xcb_motion_notify_event_t *)event;
779 xcb_point_t cursor_position = { motion->event_x, motion->event_y };
780 xcb_poly_rectangle(conn, root_window, gc, 1, &rectangle);
782 xcb_poly_rectangle(conn, root_window, gc, 1, &rectangle);
786 case XCB_BUTTON_RELEASE: {
787 xcb_poly_rectangle(conn, root_window, gc, 1, &rectangle);
797 c->width = rectangle.width;
798 c->height = rectangle.height;
799 if (
c->width &&
c->height) {
806 xcb_ungrab_server(conn);
807 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
811 xcb_free_cursor(conn, cursor);
812 xcb_close_font(conn, cursor_font);
813 xcb_free_gc(conn, gc);
821 const xcb_setup_t *setup;
827 if (!sscanf(
s->url,
"%[^+]+%d,%d", display_name, &
c->x, &
c->y)) {
829 sscanf(
s->url,
"+%d,%d", &
c->x, &
c->y);
832 c->conn = xcb_connect(display_name[0] ? display_name :
NULL, &screen_num);
835 if ((ret = xcb_connection_has_error(
c->conn))) {
837 s->url[0] ?
s->url :
"default", ret);
841 setup = xcb_get_setup(
c->conn);
851 if (
c->window_id == XCB_NONE)
852 c->window_id =
c->screen->root;
854 if (
c->select_region) {
856 c->select_region = 0;
858 if (
c->follow_mouse) {
864 if (
c->select_region) {
879 #if CONFIG_LIBXCB_SHM
880 c->has_shm = check_shm(
c->conn);
883 #if CONFIG_LIBXCB_XFIXES
885 if (!(
c->draw_mouse = check_xfixes(
c->conn))) {
887 "XFixes not available, cannot draw the mouse.\n");
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define flags(name, subs,...)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
static enum AVPixelFormat pix_fmt
static int read_header(FFV1Context *f)
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
AVBufferRef * av_buffer_create(uint8_t *data, buffer_size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)
Allocate a new AVBuffer, reusing an old buffer from the pool when available.
AVBufferPool * av_buffer_pool_init2(buffer_size_t size, void *opaque, AVBufferRef *(*alloc)(void *opaque, buffer_size_t size), void(*pool_free)(void *opaque))
Allocate and initialize a buffer pool with a more complex allocator.
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
void * av_buffer_pool_buffer_get_opaque(AVBufferRef *ref)
Query the original opaque parameter of an allocated buffer in the pool.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVERROR_EXTERNAL
Generic error in an external library.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const char * av_default_item_name(void *ptr)
Return the context name.
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
char * av_strdup(const char *s)
Duplicate a string.
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
#define LIBAVUTIL_VERSION_INT
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static av_cold int read_close(AVFormatContext *ctx)
@ AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT
static const uint16_t mask[17]
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
@ AV_PIX_FMT_RGB555BE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
@ AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
@ AV_PIX_FMT_RGB565LE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
@ AV_PIX_FMT_RGB565BE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
A reference to a data buffer.
uint8_t * data
The data buffer.
Describe the class of an AVClass context structure.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
enum AVMediaType codec_type
General type of the encoded data.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Rational number (pair of numerator and denominator).
AVCodecParameters * codecpar
Codec parameters associated with this stream.
AVRational avg_frame_rate
Average framerate.
static int ref[MAX_W *MAX_W]
int av_usleep(unsigned usec)
Sleep for a period of time.
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
int64_t av_gettime(void)
Get the current time in microseconds.
static xcb_rectangle_t rectangle_from_corners(xcb_point_t *corner_a, xcb_point_t *corner_b)
static int64_t wait_frame(AVFormatContext *s, AVPacket *pkt)
static void xcbgrab_image_reply_free(void *opaque, uint8_t *data)
static xcb_screen_t * get_screen(const xcb_setup_t *setup, int screen_num)
static int select_region(AVFormatContext *s)
static int xcbgrab_reposition(AVFormatContext *s, xcb_query_pointer_reply_t *p, xcb_get_geometry_reply_t *geo)
static int xcbgrab_frame(AVFormatContext *s, AVPacket *pkt)
static const AVOption options[]
static void setup_window(AVFormatContext *s)
AVInputFormat ff_xcbgrab_demuxer
static void xcbgrab_update_region(AVFormatContext *s, int win_x, int win_y)
static void draw_rectangle(AVFormatContext *s)
static const AVClass xcbgrab_class
static int xcbgrab_read_packet(AVFormatContext *s, AVPacket *pkt)
static int pixfmt_from_pixmap_format(AVFormatContext *s, int depth, int *pix_fmt, int *bpp)
static int create_stream(AVFormatContext *s)
static av_cold int xcbgrab_read_header(AVFormatContext *s)
static av_cold int xcbgrab_read_close(AVFormatContext *s)