yading@10: /* yading@10: * X11 video grab interface yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg integration: yading@10: * Copyright (C) 2006 Clemens Fruhwirth yading@10: * Edouard Gomez yading@10: * yading@10: * This file contains code from grab.c: yading@10: * Copyright (c) 2000-2001 Fabrice Bellard yading@10: * yading@10: * This file contains code from the xvidcap project: yading@10: * Copyright (C) 1997-1998 Rasca, Berlin yading@10: * 2003-2004 Karl H. Beckers, Frankfurt yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or modify yading@10: * it under the terms of the GNU General Public License as published by yading@10: * the Free Software Foundation; either version 2 of the License, or yading@10: * (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the yading@10: * GNU General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU General Public License yading@10: * along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * X11 frame device demuxer yading@10: * @author Clemens Fruhwirth yading@10: * @author Edouard Gomez yading@10: */ yading@10: yading@10: #include "config.h" yading@10: #include "libavformat/internal.h" yading@10: #include "libavutil/log.h" yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/parseutils.h" yading@10: #include "libavutil/time.h" yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include yading@10: #include "avdevice.h" yading@10: yading@10: /** yading@10: * X11 Device Demuxer context yading@10: */ yading@10: struct x11grab { yading@10: const AVClass *class; /**< Class for private options. */ yading@10: int frame_size; /**< Size in bytes of a grabbed frame */ yading@10: AVRational time_base; /**< Time base */ yading@10: int64_t time_frame; /**< Current time */ yading@10: yading@10: int width; /**< Width of the grab frame */ yading@10: int height; /**< Height of the grab frame */ yading@10: int x_off; /**< Horizontal top-left corner coordinate */ yading@10: int y_off; /**< Vertical top-left corner coordinate */ yading@10: yading@10: Display *dpy; /**< X11 display from which x11grab grabs frames */ yading@10: XImage *image; /**< X11 image holding the grab */ yading@10: int use_shm; /**< !0 when using XShm extension */ yading@10: XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */ yading@10: int draw_mouse; /**< Set by a private option. */ yading@10: int follow_mouse; /**< Set by a private option. */ yading@10: int show_region; /**< set by a private option. */ yading@10: char *framerate; /**< Set by a private option. */ yading@10: yading@10: Window region_win; /**< This is used by show_region option. */ yading@10: }; yading@10: yading@10: #define REGION_WIN_BORDER 3 yading@10: /** yading@10: * Draw grabbing region window yading@10: * yading@10: * @param s x11grab context yading@10: */ yading@10: static void yading@10: x11grab_draw_region_win(struct x11grab *s) yading@10: { yading@10: Display *dpy = s->dpy; yading@10: int screen; yading@10: Window win = s->region_win; yading@10: GC gc; yading@10: yading@10: screen = DefaultScreen(dpy); yading@10: gc = XCreateGC(dpy, win, 0, 0); yading@10: XSetForeground(dpy, gc, WhitePixel(dpy, screen)); yading@10: XSetBackground(dpy, gc, BlackPixel(dpy, screen)); yading@10: XSetLineAttributes(dpy, gc, REGION_WIN_BORDER, LineDoubleDash, 0, 0); yading@10: XDrawRectangle(dpy, win, gc, yading@10: 1, 1, yading@10: (s->width + REGION_WIN_BORDER * 2) - 1 * 2 - 1, yading@10: (s->height + REGION_WIN_BORDER * 2) - 1 * 2 - 1); yading@10: XFreeGC(dpy, gc); yading@10: } yading@10: yading@10: /** yading@10: * Initialize grabbing region window yading@10: * yading@10: * @param s x11grab context yading@10: */ yading@10: static void yading@10: x11grab_region_win_init(struct x11grab *s) yading@10: { yading@10: Display *dpy = s->dpy; yading@10: int screen; yading@10: XSetWindowAttributes attribs; yading@10: XRectangle rect; yading@10: yading@10: screen = DefaultScreen(dpy); yading@10: attribs.override_redirect = True; yading@10: s->region_win = XCreateWindow(dpy, RootWindow(dpy, screen), yading@10: s->x_off - REGION_WIN_BORDER, yading@10: s->y_off - REGION_WIN_BORDER, yading@10: s->width + REGION_WIN_BORDER * 2, yading@10: s->height + REGION_WIN_BORDER * 2, yading@10: 0, CopyFromParent, yading@10: InputOutput, CopyFromParent, yading@10: CWOverrideRedirect, &attribs); yading@10: rect.x = 0; yading@10: rect.y = 0; yading@10: rect.width = s->width; yading@10: rect.height = s->height; yading@10: XShapeCombineRectangles(dpy, s->region_win, yading@10: ShapeBounding, REGION_WIN_BORDER, REGION_WIN_BORDER, yading@10: &rect, 1, ShapeSubtract, 0); yading@10: XMapWindow(dpy, s->region_win); yading@10: XSelectInput(dpy, s->region_win, ExposureMask | StructureNotifyMask); yading@10: x11grab_draw_region_win(s); yading@10: } yading@10: yading@10: /** yading@10: * Initialize the x11 grab device demuxer (public device demuxer API). yading@10: * yading@10: * @param s1 Context from avformat core yading@10: * @return
    yading@10: *
  • AVERROR(ENOMEM) no memory left
    • yading@10: *
  • AVERROR(EIO) other failure case
    • yading@10: *
  • 0 success
    • yading@10: *
yading@10: */ yading@10: static int yading@10: x11grab_read_header(AVFormatContext *s1) yading@10: { yading@10: struct x11grab *x11grab = s1->priv_data; yading@10: Display *dpy; yading@10: AVStream *st = NULL; yading@10: enum AVPixelFormat input_pixfmt; yading@10: XImage *image; yading@10: int x_off = 0; yading@10: int y_off = 0; yading@10: int screen; yading@10: int use_shm; yading@10: char *dpyname, *offset; yading@10: int ret = 0; yading@10: AVRational framerate; yading@10: yading@10: dpyname = av_strdup(s1->filename); yading@10: if (!dpyname) yading@10: goto out; yading@10: yading@10: offset = strchr(dpyname, '+'); yading@10: if (offset) { yading@10: sscanf(offset, "%d,%d", &x_off, &y_off); yading@10: if (strstr(offset, "nomouse")) { yading@10: av_log(s1, AV_LOG_WARNING, yading@10: "'nomouse' specification in argument is deprecated: " yading@10: "use 'draw_mouse' option with value 0 instead\n"); yading@10: x11grab->draw_mouse = 0; yading@10: } yading@10: *offset= 0; yading@10: } yading@10: yading@10: if ((ret = av_parse_video_rate(&framerate, x11grab->framerate)) < 0) { yading@10: av_log(s1, AV_LOG_ERROR, "Could not parse framerate: %s.\n", x11grab->framerate); yading@10: goto out; yading@10: } yading@10: av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", yading@10: s1->filename, dpyname, x_off, y_off, x11grab->width, x11grab->height); yading@10: yading@10: dpy = XOpenDisplay(dpyname); yading@10: av_freep(&dpyname); yading@10: if(!dpy) { yading@10: av_log(s1, AV_LOG_ERROR, "Could not open X display.\n"); yading@10: ret = AVERROR(EIO); yading@10: goto out; yading@10: } yading@10: yading@10: st = avformat_new_stream(s1, NULL); yading@10: if (!st) { yading@10: ret = AVERROR(ENOMEM); yading@10: goto out; yading@10: } yading@10: avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ yading@10: yading@10: screen = DefaultScreen(dpy); yading@10: yading@10: if (x11grab->follow_mouse) { yading@10: int screen_w, screen_h; yading@10: Window w; yading@10: yading@10: screen_w = DisplayWidth(dpy, screen); yading@10: screen_h = DisplayHeight(dpy, screen); yading@10: XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off, &ret, &ret, &ret); yading@10: x_off -= x11grab->width / 2; yading@10: y_off -= x11grab->height / 2; yading@10: x_off = FFMIN(FFMAX(x_off, 0), screen_w - x11grab->width); yading@10: y_off = FFMIN(FFMAX(y_off, 0), screen_h - x11grab->height); yading@10: av_log(s1, AV_LOG_INFO, "followmouse is enabled, resetting grabbing region to x: %d y: %d\n", x_off, y_off); yading@10: } yading@10: yading@10: use_shm = XShmQueryExtension(dpy); yading@10: av_log(s1, AV_LOG_INFO, "shared memory extension%s found\n", use_shm ? "" : " not"); yading@10: yading@10: if(use_shm) { yading@10: int scr = XDefaultScreen(dpy); yading@10: image = XShmCreateImage(dpy, yading@10: DefaultVisual(dpy, scr), yading@10: DefaultDepth(dpy, scr), yading@10: ZPixmap, yading@10: NULL, yading@10: &x11grab->shminfo, yading@10: x11grab->width, x11grab->height); yading@10: x11grab->shminfo.shmid = shmget(IPC_PRIVATE, yading@10: image->bytes_per_line * image->height, yading@10: IPC_CREAT|0777); yading@10: if (x11grab->shminfo.shmid == -1) { yading@10: av_log(s1, AV_LOG_ERROR, "Fatal: Can't get shared memory!\n"); yading@10: ret = AVERROR(ENOMEM); yading@10: goto out; yading@10: } yading@10: x11grab->shminfo.shmaddr = image->data = shmat(x11grab->shminfo.shmid, 0, 0); yading@10: x11grab->shminfo.readOnly = False; yading@10: yading@10: if (!XShmAttach(dpy, &x11grab->shminfo)) { yading@10: av_log(s1, AV_LOG_ERROR, "Fatal: Failed to attach shared memory!\n"); yading@10: /* needs some better error subroutine :) */ yading@10: ret = AVERROR(EIO); yading@10: goto out; yading@10: } yading@10: } else { yading@10: image = XGetImage(dpy, RootWindow(dpy, screen), yading@10: x_off,y_off, yading@10: x11grab->width, x11grab->height, yading@10: AllPlanes, ZPixmap); yading@10: } yading@10: yading@10: switch (image->bits_per_pixel) { yading@10: case 8: yading@10: av_log (s1, AV_LOG_DEBUG, "8 bit palette\n"); yading@10: input_pixfmt = AV_PIX_FMT_PAL8; yading@10: break; yading@10: case 16: yading@10: if ( image->red_mask == 0xf800 && yading@10: image->green_mask == 0x07e0 && yading@10: image->blue_mask == 0x001f ) { yading@10: av_log (s1, AV_LOG_DEBUG, "16 bit RGB565\n"); yading@10: input_pixfmt = AV_PIX_FMT_RGB565; yading@10: } else if (image->red_mask == 0x7c00 && yading@10: image->green_mask == 0x03e0 && yading@10: image->blue_mask == 0x001f ) { yading@10: av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n"); yading@10: input_pixfmt = AV_PIX_FMT_RGB555; yading@10: } else { yading@10: av_log(s1, AV_LOG_ERROR, "RGB ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel); yading@10: av_log(s1, AV_LOG_ERROR, "color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n", image->red_mask, image->green_mask, image->blue_mask); yading@10: ret = AVERROR(EIO); yading@10: goto out; yading@10: } yading@10: break; yading@10: case 24: yading@10: if ( image->red_mask == 0xff0000 && yading@10: image->green_mask == 0x00ff00 && yading@10: image->blue_mask == 0x0000ff ) { yading@10: input_pixfmt = AV_PIX_FMT_BGR24; yading@10: } else if ( image->red_mask == 0x0000ff && yading@10: image->green_mask == 0x00ff00 && yading@10: image->blue_mask == 0xff0000 ) { yading@10: input_pixfmt = AV_PIX_FMT_RGB24; yading@10: } else { yading@10: av_log(s1, AV_LOG_ERROR,"rgb ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel); yading@10: av_log(s1, AV_LOG_ERROR, "color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n", image->red_mask, image->green_mask, image->blue_mask); yading@10: ret = AVERROR(EIO); yading@10: goto out; yading@10: } yading@10: break; yading@10: case 32: yading@10: input_pixfmt = AV_PIX_FMT_0RGB32; yading@10: break; yading@10: default: yading@10: av_log(s1, AV_LOG_ERROR, "image depth %i not supported ... aborting\n", image->bits_per_pixel); yading@10: ret = AVERROR(EINVAL); yading@10: goto out; yading@10: } yading@10: yading@10: x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel/8; yading@10: x11grab->dpy = dpy; yading@10: x11grab->time_base = av_inv_q(framerate); yading@10: x11grab->time_frame = av_gettime() / av_q2d(x11grab->time_base); yading@10: x11grab->x_off = x_off; yading@10: x11grab->y_off = y_off; yading@10: x11grab->image = image; yading@10: x11grab->use_shm = use_shm; yading@10: yading@10: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@10: st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; yading@10: st->codec->width = x11grab->width; yading@10: st->codec->height = x11grab->height; yading@10: st->codec->pix_fmt = input_pixfmt; yading@10: st->codec->time_base = x11grab->time_base; yading@10: st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(x11grab->time_base) * 8; yading@10: yading@10: out: yading@10: av_free(dpyname); yading@10: return ret; yading@10: } yading@10: yading@10: /** yading@10: * Paint a mouse pointer in an X11 image. yading@10: * yading@10: * @param image image to paint the mouse pointer to yading@10: * @param s context used to retrieve original grabbing rectangle yading@10: * coordinates yading@10: */ yading@10: static void yading@10: paint_mouse_pointer(XImage *image, struct x11grab *s) yading@10: { yading@10: int x_off = s->x_off; yading@10: int y_off = s->y_off; yading@10: int width = s->width; yading@10: int height = s->height; yading@10: Display *dpy = s->dpy; yading@10: XFixesCursorImage *xcim; yading@10: int x, y; yading@10: int line, column; yading@10: int to_line, to_column; yading@10: int pixstride = image->bits_per_pixel >> 3; yading@10: /* Warning: in its insanity, xlib provides unsigned image data through a yading@10: * char* pointer, so we have to make it uint8_t to make things not break. yading@10: * Anyone who performs further investigation of the xlib API likely risks yading@10: * permanent brain damage. */ yading@10: uint8_t *pix = image->data; yading@10: Cursor c; yading@10: Window w; yading@10: XSetWindowAttributes attr; yading@10: yading@10: /* Code doesn't currently support 16-bit or PAL8 */ yading@10: if (image->bits_per_pixel != 24 && image->bits_per_pixel != 32) yading@10: return; yading@10: yading@10: c = XCreateFontCursor(dpy, XC_left_ptr); yading@10: w = DefaultRootWindow(dpy); yading@10: attr.cursor = c; yading@10: XChangeWindowAttributes(dpy, w, CWCursor, &attr); yading@10: yading@10: xcim = XFixesGetCursorImage(dpy); yading@10: yading@10: x = xcim->x - xcim->xhot; yading@10: y = xcim->y - xcim->yhot; yading@10: yading@10: to_line = FFMIN((y + xcim->height), (height + y_off)); yading@10: to_column = FFMIN((x + xcim->width), (width + x_off)); yading@10: yading@10: for (line = FFMAX(y, y_off); line < to_line; line++) { yading@10: for (column = FFMAX(x, x_off); column < to_column; column++) { yading@10: int xcim_addr = (line - y) * xcim->width + column - x; yading@10: int image_addr = ((line - y_off) * width + column - x_off) * pixstride; yading@10: int r = (uint8_t)(xcim->pixels[xcim_addr] >> 0); yading@10: int g = (uint8_t)(xcim->pixels[xcim_addr] >> 8); yading@10: int b = (uint8_t)(xcim->pixels[xcim_addr] >> 16); yading@10: int a = (uint8_t)(xcim->pixels[xcim_addr] >> 24); yading@10: yading@10: if (a == 255) { yading@10: pix[image_addr+0] = r; yading@10: pix[image_addr+1] = g; yading@10: pix[image_addr+2] = b; yading@10: } else if (a) { yading@10: /* pixel values from XFixesGetCursorImage come premultiplied by alpha */ yading@10: pix[image_addr+0] = r + (pix[image_addr+0]*(255-a) + 255/2) / 255; yading@10: pix[image_addr+1] = g + (pix[image_addr+1]*(255-a) + 255/2) / 255; yading@10: pix[image_addr+2] = b + (pix[image_addr+2]*(255-a) + 255/2) / 255; yading@10: } yading@10: } yading@10: } yading@10: yading@10: XFree(xcim); yading@10: xcim = NULL; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Read new data in the image structure. yading@10: * yading@10: * @param dpy X11 display to grab from yading@10: * @param d yading@10: * @param image Image where the grab will be put yading@10: * @param x Top-Left grabbing rectangle horizontal coordinate yading@10: * @param y Top-Left grabbing rectangle vertical coordinate yading@10: * @return 0 if error, !0 if successful yading@10: */ yading@10: static int yading@10: xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y) yading@10: { yading@10: xGetImageReply rep; yading@10: xGetImageReq *req; yading@10: long nbytes; yading@10: yading@10: if (!image) { yading@10: return 0; yading@10: } yading@10: yading@10: LockDisplay(dpy); yading@10: GetReq(GetImage, req); yading@10: yading@10: /* First set up the standard stuff in the request */ yading@10: req->drawable = d; yading@10: req->x = x; yading@10: req->y = y; yading@10: req->width = image->width; yading@10: req->height = image->height; yading@10: req->planeMask = (unsigned int)AllPlanes; yading@10: req->format = ZPixmap; yading@10: yading@10: if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) { yading@10: UnlockDisplay(dpy); yading@10: SyncHandle(); yading@10: return 0; yading@10: } yading@10: yading@10: nbytes = (long)rep.length << 2; yading@10: _XReadPad(dpy, image->data, nbytes); yading@10: yading@10: UnlockDisplay(dpy); yading@10: SyncHandle(); yading@10: return 1; yading@10: } yading@10: yading@10: /** yading@10: * Grab a frame from x11 (public device demuxer API). yading@10: * yading@10: * @param s1 Context from avformat core yading@10: * @param pkt Packet holding the brabbed frame yading@10: * @return frame size in bytes yading@10: */ yading@10: static int yading@10: x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt) yading@10: { yading@10: struct x11grab *s = s1->priv_data; yading@10: Display *dpy = s->dpy; yading@10: XImage *image = s->image; yading@10: int x_off = s->x_off; yading@10: int y_off = s->y_off; yading@10: yading@10: int screen; yading@10: Window root; yading@10: int follow_mouse = s->follow_mouse; yading@10: yading@10: int64_t curtime, delay; yading@10: struct timespec ts; yading@10: yading@10: /* Calculate the time of the next frame */ yading@10: s->time_frame += INT64_C(1000000); yading@10: yading@10: /* wait based on the frame rate */ yading@10: for(;;) { yading@10: curtime = av_gettime(); yading@10: delay = s->time_frame * av_q2d(s->time_base) - curtime; yading@10: if (delay <= 0) { yading@10: if (delay < INT64_C(-1000000) * av_q2d(s->time_base)) { yading@10: s->time_frame += INT64_C(1000000); yading@10: } yading@10: break; yading@10: } yading@10: ts.tv_sec = delay / 1000000; yading@10: ts.tv_nsec = (delay % 1000000) * 1000; yading@10: nanosleep(&ts, NULL); yading@10: } yading@10: yading@10: av_init_packet(pkt); yading@10: pkt->data = image->data; yading@10: pkt->size = s->frame_size; yading@10: pkt->pts = curtime; yading@10: yading@10: screen = DefaultScreen(dpy); yading@10: root = RootWindow(dpy, screen); yading@10: if (follow_mouse) { yading@10: int screen_w, screen_h; yading@10: int pointer_x, pointer_y, _; yading@10: Window w; yading@10: yading@10: screen_w = DisplayWidth(dpy, screen); yading@10: screen_h = DisplayHeight(dpy, screen); yading@10: XQueryPointer(dpy, root, &w, &w, &pointer_x, &pointer_y, &_, &_, &_); yading@10: if (follow_mouse == -1) { yading@10: // follow the mouse, put it at center of grabbing region yading@10: x_off += pointer_x - s->width / 2 - x_off; yading@10: y_off += pointer_y - s->height / 2 - y_off; yading@10: } else { yading@10: // follow the mouse, but only move the grabbing region when mouse yading@10: // reaches within certain pixels to the edge. yading@10: if (pointer_x > x_off + s->width - follow_mouse) { yading@10: x_off += pointer_x - (x_off + s->width - follow_mouse); yading@10: } else if (pointer_x < x_off + follow_mouse) yading@10: x_off -= (x_off + follow_mouse) - pointer_x; yading@10: if (pointer_y > y_off + s->height - follow_mouse) { yading@10: y_off += pointer_y - (y_off + s->height - follow_mouse); yading@10: } else if (pointer_y < y_off + follow_mouse) yading@10: y_off -= (y_off + follow_mouse) - pointer_y; yading@10: } yading@10: // adjust grabbing region position if it goes out of screen. yading@10: s->x_off = x_off = FFMIN(FFMAX(x_off, 0), screen_w - s->width); yading@10: s->y_off = y_off = FFMIN(FFMAX(y_off, 0), screen_h - s->height); yading@10: yading@10: if (s->show_region && s->region_win) yading@10: XMoveWindow(dpy, s->region_win, yading@10: s->x_off - REGION_WIN_BORDER, yading@10: s->y_off - REGION_WIN_BORDER); yading@10: } yading@10: yading@10: if (s->show_region) { yading@10: if (s->region_win) { yading@10: XEvent evt; yading@10: // clean up the events, and do the initinal draw or redraw. yading@10: for (evt.type = NoEventMask; XCheckMaskEvent(dpy, ExposureMask | StructureNotifyMask, &evt); ); yading@10: if (evt.type) yading@10: x11grab_draw_region_win(s); yading@10: } else { yading@10: x11grab_region_win_init(s); yading@10: } yading@10: } yading@10: yading@10: if(s->use_shm) { yading@10: if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes)) { yading@10: av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n"); yading@10: } yading@10: } else { yading@10: if (!xget_zpixmap(dpy, root, image, x_off, y_off)) { yading@10: av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n"); yading@10: } yading@10: } yading@10: yading@10: if (s->draw_mouse) { yading@10: paint_mouse_pointer(image, s); yading@10: } yading@10: yading@10: return s->frame_size; yading@10: } yading@10: yading@10: /** yading@10: * Close x11 frame grabber (public device demuxer API). yading@10: * yading@10: * @param s1 Context from avformat core yading@10: * @return 0 success, !0 failure yading@10: */ yading@10: static int yading@10: x11grab_read_close(AVFormatContext *s1) yading@10: { yading@10: struct x11grab *x11grab = s1->priv_data; yading@10: yading@10: /* Detach cleanly from shared mem */ yading@10: if (x11grab->use_shm) { yading@10: XShmDetach(x11grab->dpy, &x11grab->shminfo); yading@10: shmdt(x11grab->shminfo.shmaddr); yading@10: shmctl(x11grab->shminfo.shmid, IPC_RMID, NULL); yading@10: } yading@10: yading@10: /* Destroy X11 image */ yading@10: if (x11grab->image) { yading@10: XDestroyImage(x11grab->image); yading@10: x11grab->image = NULL; yading@10: } yading@10: yading@10: if (x11grab->region_win) { yading@10: XDestroyWindow(x11grab->dpy, x11grab->region_win); yading@10: } yading@10: yading@10: /* Free X11 display */ yading@10: XCloseDisplay(x11grab->dpy); yading@10: return 0; yading@10: } yading@10: yading@10: #define OFFSET(x) offsetof(struct x11grab, x) yading@10: #define DEC AV_OPT_FLAG_DECODING_PARAM yading@10: static const AVOption options[] = { yading@10: { "draw_mouse", "draw the mouse pointer", OFFSET(draw_mouse), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC }, yading@10: yading@10: { "follow_mouse", "move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region", yading@10: OFFSET(follow_mouse), AV_OPT_TYPE_INT, {.i64 = 0}, -1, INT_MAX, DEC, "follow_mouse" }, yading@10: { "centered", "keep the mouse pointer at the center of grabbing region when following", yading@10: 0, AV_OPT_TYPE_CONST, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "follow_mouse" }, yading@10: yading@10: { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, yading@10: { "show_region", "show the grabbing region", OFFSET(show_region), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC }, yading@10: { "video_size", "set video frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC }, yading@10: { NULL }, yading@10: }; yading@10: yading@10: static const AVClass x11_class = { yading@10: .class_name = "X11grab indev", yading@10: .item_name = av_default_item_name, yading@10: .option = options, yading@10: .version = LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: /** x11 grabber device demuxer declaration */ yading@10: AVInputFormat ff_x11grab_demuxer = { yading@10: .name = "x11grab", yading@10: .long_name = NULL_IF_CONFIG_SMALL("X11grab"), yading@10: .priv_data_size = sizeof(struct x11grab), yading@10: .read_header = x11grab_read_header, yading@10: .read_packet = x11grab_read_packet, yading@10: .read_close = x11grab_read_close, yading@10: .flags = AVFMT_NOFILE, yading@10: .priv_class = &x11_class, yading@10: };