/** * Processing callback */ static void Demux (void *data) { demux_t *demux = data; demux_sys_t *sys = demux->p_sys; xcb_connection_t *conn = sys->conn; /* Determine capture region */ xcb_get_geometry_cookie_t gc; xcb_query_pointer_cookie_t qc; gc = xcb_get_geometry (conn, sys->window); if (sys->follow_mouse) qc = xcb_query_pointer (conn, sys->window); xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply (conn, gc, NULL); if (geo == NULL) { msg_Err (demux, "bad X11 drawable 0x%08"PRIx32, sys->window); discard: if (sys->follow_mouse) xcb_discard_reply (conn, gc.sequence); return; } int w = sys->w; int h = sys->h; int x, y; if (sys->follow_mouse) { xcb_query_pointer_reply_t *ptr = xcb_query_pointer_reply (conn, qc, NULL); if (ptr == NULL) { free (geo); return; } if (w == 0 || w > geo->width) w = geo->width; x = ptr->win_x; if (x < w / 2) x = 0; else if (x >= (int)geo->width - (w / 2)) x = geo->width - w; else x -= w / 2; if (h == 0 || h > geo->height) h = geo->height; y = ptr->win_y; if (y < h / 2) y = 0; else if (y >= (int)geo->height - (h / 2)) y = geo->height - h; else y -= h / 2; } else { int max; x = sys->x; max = (int)geo->width - x; if (max <= 0) goto discard; if (w == 0 || w > max) w = max; y = sys->y; max = (int)geo->height - y; if (max <= 0) goto discard; if (h == 0 || h > max) h = max; } /* Update elementary stream format (if needed) */ if (w != sys->cur_w || h != sys->cur_h) { if (sys->es != NULL) es_out_Del (demux->out, sys->es); /* Update composite pixmap */ if (sys->window != geo->root) { xcb_free_pixmap (conn, sys->pixmap); /* no-op first time */ xcb_composite_name_window_pixmap (conn, sys->window, sys->pixmap); xcb_create_pixmap (conn, geo->depth, sys->pixmap, geo->root, geo->width, geo->height); } sys->es = InitES (demux, w, h, geo->depth); if (sys->es != NULL) { sys->cur_w = w; sys->cur_h = h; } } /* Capture screen */ xcb_drawable_t drawable = (sys->window != geo->root) ? sys->pixmap : sys->window; free (geo); xcb_get_image_reply_t *img; img = xcb_get_image_reply (conn, xcb_get_image (conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable, x, y, w, h, ~0), NULL); if (img == NULL) return; block_t *block = block_heap_Alloc (img, xcb_get_image_data (img), xcb_get_image_data_length (img)); if (block == NULL) return; /* Send block - zero copy */ if (sys->es != NULL) { if (sys->pts == VLC_TS_INVALID) sys->pts = mdate (); block->i_pts = block->i_dts = sys->pts; es_out_Control (demux->out, ES_OUT_SET_PCR, sys->pts); es_out_Send (demux->out, sys->es, block); sys->pts += sys->interval; } }
/** * Processing callback */ static void Demux (void *opaque) { demux_t *demux = opaque; demux_sys_t *sys = demux->p_sys; xcb_connection_t *conn = sys->conn; /* Determine capture region */ xcb_get_geometry_cookie_t gc; xcb_query_pointer_cookie_t qc; gc = xcb_get_geometry (conn, sys->window); if (sys->follow_mouse) qc = xcb_query_pointer (conn, sys->window); xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply (conn, gc, NULL); if (geo == NULL) { msg_Err (demux, "bad X11 drawable 0x%08"PRIx32, sys->window); discard: if (sys->follow_mouse) xcb_discard_reply (conn, gc.sequence); return; } int w = sys->w; int h = sys->h; int x, y; if (sys->follow_mouse) { xcb_query_pointer_reply_t *ptr = xcb_query_pointer_reply (conn, qc, NULL); if (ptr == NULL) { free (geo); return; } if (w == 0 || w > geo->width) w = geo->width; x = ptr->win_x; if (x < w / 2) x = 0; else if (x >= (int)geo->width - (w / 2)) x = geo->width - w; else x -= w / 2; if (h == 0 || h > geo->height) h = geo->height; y = ptr->win_y; if (y < h / 2) y = 0; else if (y >= (int)geo->height - (h / 2)) y = geo->height - h; else y -= h / 2; } else { int max; x = sys->x; max = (int)geo->width - x; if (max <= 0) goto discard; if (w == 0 || w > max) w = max; y = sys->y; max = (int)geo->height - y; if (max <= 0) goto discard; if (h == 0 || h > max) h = max; } /* Update elementary stream format (if needed) */ if (w != sys->cur_w || h != sys->cur_h) { if (sys->es != NULL) es_out_Del (demux->out, sys->es); /* Update composite pixmap */ if (sys->window != geo->root) { xcb_free_pixmap (conn, sys->pixmap); /* no-op first time */ xcb_composite_name_window_pixmap (conn, sys->window, sys->pixmap); xcb_create_pixmap (conn, geo->depth, sys->pixmap, geo->root, geo->width, geo->height); } sys->es = InitES (demux, w, h, geo->depth, &sys->bpp); if (sys->es != NULL) { sys->cur_w = w; sys->cur_h = h; sys->bpp /= 8; /* bits -> bytes */ } } /* Capture screen */ xcb_drawable_t drawable = (sys->window != geo->root) ? sys->pixmap : sys->window; free (geo); block_t *block = NULL; #if HAVE_SYS_SHM_H if (sys->shm) { /* Capture screen through shared memory */ size_t size = w * h * sys->bpp; int id = shmget (IPC_PRIVATE, size, IPC_CREAT | 0777); if (id == -1) /* XXX: fallback */ { msg_Err (demux, "shared memory allocation error: %m"); goto noshm; } /* Attach the segment to X and capture */ xcb_shm_get_image_reply_t *img; xcb_shm_get_image_cookie_t ck; xcb_shm_attach (conn, sys->segment, id, 0 /* read/write */); ck = xcb_shm_get_image (conn, drawable, x, y, w, h, ~0, XCB_IMAGE_FORMAT_Z_PIXMAP, sys->segment, 0); xcb_shm_detach (conn, sys->segment); img = xcb_shm_get_image_reply (conn, ck, NULL); xcb_flush (conn); /* ensure eventual detach */ if (img == NULL) { shmctl (id, IPC_RMID, 0); goto noshm; } free (img); /* Attach the segment to VLC */ void *shm = shmat (id, NULL, 0 /* read/write */); shmctl (id, IPC_RMID, 0); if (-1 == (intptr_t)shm) { msg_Err (demux, "shared memory attachment error: %m"); return; } block = block_shm_Alloc (shm, size); if (unlikely(block == NULL)) shmdt (shm); } noshm: #endif if (block == NULL) { /* Capture screen through socket (fallback) */ xcb_get_image_reply_t *img; img = xcb_get_image_reply (conn, xcb_get_image (conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable, x, y, w, h, ~0), NULL); if (img == NULL) return; uint8_t *data = xcb_get_image_data (img); size_t datalen = xcb_get_image_data_length (img); block = block_heap_Alloc (img, data + datalen - (uint8_t *)img); if (block == NULL) return; block->p_buffer = data; block->i_buffer = datalen; } /* Send block - zero copy */ if (sys->es != NULL) { block->i_pts = block->i_dts = mdate (); es_out_Control (demux->out, ES_OUT_SET_PCR, block->i_pts); es_out_Send (demux->out, sys->es, block); } }