| 0,0 → 1,648 |
|---|
| /* |
| * X11 video grab interface |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg integration: |
| * Copyright (C) 2006 Clemens Fruhwirth <clemens@endorphin.org> |
| * Edouard Gomez <ed.gomez@free.fr> |
| * |
| * This file contains code from grab.c: |
| * Copyright (c) 2000-2001 Fabrice Bellard |
| * |
| * This file contains code from the xvidcap project: |
| * Copyright (C) 1997-1998 Rasca, Berlin |
| * 2003-2004 Karl H. Beckers, Frankfurt |
| * |
| * FFmpeg is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * X11 frame device demuxer |
| * @author Clemens Fruhwirth <clemens@endorphin.org> |
| * @author Edouard Gomez <ed.gomez@free.fr> |
| */ |
| |
| #include "config.h" |
| #include "libavformat/internal.h" |
| #include "libavutil/log.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/parseutils.h" |
| #include "libavutil/time.h" |
| #include <time.h> |
| #include <X11/cursorfont.h> |
| #include <X11/X.h> |
| #include <X11/Xlib.h> |
| #include <X11/Xlibint.h> |
| #include <X11/Xproto.h> |
| #include <X11/Xutil.h> |
| #include <sys/shm.h> |
| #include <X11/extensions/shape.h> |
| #include <X11/extensions/XShm.h> |
| #include <X11/extensions/Xfixes.h> |
| #include "avdevice.h" |
| |
| /** |
| * X11 Device Demuxer context |
| */ |
| struct x11grab { |
| const AVClass *class; /**< Class for private options. */ |
| int frame_size; /**< Size in bytes of a grabbed frame */ |
| AVRational time_base; /**< Time base */ |
| int64_t time_frame; /**< Current time */ |
| |
| int width; /**< Width of the grab frame */ |
| int height; /**< Height of the grab frame */ |
| int x_off; /**< Horizontal top-left corner coordinate */ |
| int y_off; /**< Vertical top-left corner coordinate */ |
| |
| Display *dpy; /**< X11 display from which x11grab grabs frames */ |
| XImage *image; /**< X11 image holding the grab */ |
| int use_shm; /**< !0 when using XShm extension */ |
| XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */ |
| int draw_mouse; /**< Set by a private option. */ |
| int follow_mouse; /**< Set by a private option. */ |
| int show_region; /**< set by a private option. */ |
| AVRational framerate; /**< Set by a private option. */ |
| int palette_changed; |
| uint32_t palette[256]; |
| |
| Cursor c; |
| Window region_win; /**< This is used by show_region option. */ |
| }; |
| |
| #define REGION_WIN_BORDER 3 |
| /** |
| * Draw grabbing region window |
| * |
| * @param s x11grab context |
| */ |
| static void |
| x11grab_draw_region_win(struct x11grab *s) |
| { |
| Display *dpy = s->dpy; |
| int screen; |
| Window win = s->region_win; |
| GC gc; |
| |
| screen = DefaultScreen(dpy); |
| gc = XCreateGC(dpy, win, 0, 0); |
| XSetForeground(dpy, gc, WhitePixel(dpy, screen)); |
| XSetBackground(dpy, gc, BlackPixel(dpy, screen)); |
| XSetLineAttributes(dpy, gc, REGION_WIN_BORDER, LineDoubleDash, 0, 0); |
| XDrawRectangle(dpy, win, gc, |
| 1, 1, |
| (s->width + REGION_WIN_BORDER * 2) - 1 * 2 - 1, |
| (s->height + REGION_WIN_BORDER * 2) - 1 * 2 - 1); |
| XFreeGC(dpy, gc); |
| } |
| |
| /** |
| * Initialize grabbing region window |
| * |
| * @param s x11grab context |
| */ |
| static void |
| x11grab_region_win_init(struct x11grab *s) |
| { |
| Display *dpy = s->dpy; |
| int screen; |
| XSetWindowAttributes attribs; |
| XRectangle rect; |
| |
| screen = DefaultScreen(dpy); |
| attribs.override_redirect = True; |
| s->region_win = XCreateWindow(dpy, RootWindow(dpy, screen), |
| s->x_off - REGION_WIN_BORDER, |
| s->y_off - REGION_WIN_BORDER, |
| s->width + REGION_WIN_BORDER * 2, |
| s->height + REGION_WIN_BORDER * 2, |
| 0, CopyFromParent, |
| InputOutput, CopyFromParent, |
| CWOverrideRedirect, &attribs); |
| rect.x = 0; |
| rect.y = 0; |
| rect.width = s->width; |
| rect.height = s->height; |
| XShapeCombineRectangles(dpy, s->region_win, |
| ShapeBounding, REGION_WIN_BORDER, REGION_WIN_BORDER, |
| &rect, 1, ShapeSubtract, 0); |
| XMapWindow(dpy, s->region_win); |
| XSelectInput(dpy, s->region_win, ExposureMask | StructureNotifyMask); |
| x11grab_draw_region_win(s); |
| } |
| |
| /** |
| * Initialize the x11 grab device demuxer (public device demuxer API). |
| * |
| * @param s1 Context from avformat core |
| * @return <ul> |
| * <li>AVERROR(ENOMEM) no memory left</li> |
| * <li>AVERROR(EIO) other failure case</li> |
| * <li>0 success</li> |
| * </ul> |
| */ |
| static int |
| x11grab_read_header(AVFormatContext *s1) |
| { |
| struct x11grab *x11grab = s1->priv_data; |
| Display *dpy; |
| AVStream *st = NULL; |
| enum AVPixelFormat input_pixfmt; |
| XImage *image; |
| int x_off = 0; |
| int y_off = 0; |
| int screen; |
| int use_shm; |
| char *dpyname, *offset; |
| int ret = 0; |
| Colormap color_map; |
| XColor color[256]; |
| int i; |
| |
| dpyname = av_strdup(s1->filename); |
| if (!dpyname) |
| goto out; |
| |
| offset = strchr(dpyname, '+'); |
| if (offset) { |
| sscanf(offset, "%d,%d", &x_off, &y_off); |
| if (strstr(offset, "nomouse")) { |
| av_log(s1, AV_LOG_WARNING, |
| "'nomouse' specification in argument is deprecated: " |
| "use 'draw_mouse' option with value 0 instead\n"); |
| x11grab->draw_mouse = 0; |
| } |
| *offset= 0; |
| } |
| |
| av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", |
| s1->filename, dpyname, x_off, y_off, x11grab->width, x11grab->height); |
| |
| dpy = XOpenDisplay(dpyname); |
| av_freep(&dpyname); |
| if(!dpy) { |
| av_log(s1, AV_LOG_ERROR, "Could not open X display.\n"); |
| ret = AVERROR(EIO); |
| goto out; |
| } |
| |
| st = avformat_new_stream(s1, NULL); |
| if (!st) { |
| ret = AVERROR(ENOMEM); |
| goto out; |
| } |
| avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| |
| screen = DefaultScreen(dpy); |
| |
| if (x11grab->follow_mouse) { |
| int screen_w, screen_h; |
| Window w; |
| |
| screen_w = DisplayWidth(dpy, screen); |
| screen_h = DisplayHeight(dpy, screen); |
| XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off, &ret, &ret, &ret); |
| x_off -= x11grab->width / 2; |
| y_off -= x11grab->height / 2; |
| x_off = FFMIN(FFMAX(x_off, 0), screen_w - x11grab->width); |
| y_off = FFMIN(FFMAX(y_off, 0), screen_h - x11grab->height); |
| av_log(s1, AV_LOG_INFO, "followmouse is enabled, resetting grabbing region to x: %d y: %d\n", x_off, y_off); |
| } |
| |
| use_shm = XShmQueryExtension(dpy); |
| av_log(s1, AV_LOG_INFO, "shared memory extension%s found\n", use_shm ? "" : " not"); |
| |
| if(use_shm) { |
| int scr = XDefaultScreen(dpy); |
| image = XShmCreateImage(dpy, |
| DefaultVisual(dpy, scr), |
| DefaultDepth(dpy, scr), |
| ZPixmap, |
| NULL, |
| &x11grab->shminfo, |
| x11grab->width, x11grab->height); |
| x11grab->shminfo.shmid = shmget(IPC_PRIVATE, |
| image->bytes_per_line * image->height, |
| IPC_CREAT|0777); |
| if (x11grab->shminfo.shmid == -1) { |
| av_log(s1, AV_LOG_ERROR, "Fatal: Can't get shared memory!\n"); |
| ret = AVERROR(ENOMEM); |
| goto out; |
| } |
| x11grab->shminfo.shmaddr = image->data = shmat(x11grab->shminfo.shmid, 0, 0); |
| x11grab->shminfo.readOnly = False; |
| |
| if (!XShmAttach(dpy, &x11grab->shminfo)) { |
| av_log(s1, AV_LOG_ERROR, "Fatal: Failed to attach shared memory!\n"); |
| /* needs some better error subroutine :) */ |
| ret = AVERROR(EIO); |
| goto out; |
| } |
| } else { |
| image = XGetImage(dpy, RootWindow(dpy, screen), |
| x_off,y_off, |
| x11grab->width, x11grab->height, |
| AllPlanes, ZPixmap); |
| } |
| |
| switch (image->bits_per_pixel) { |
| case 8: |
| av_log (s1, AV_LOG_DEBUG, "8 bit palette\n"); |
| input_pixfmt = AV_PIX_FMT_PAL8; |
| color_map = DefaultColormap(dpy, screen); |
| for (i = 0; i < 256; ++i) |
| color[i].pixel = i; |
| XQueryColors(dpy, color_map, color, 256); |
| for (i = 0; i < 256; ++i) |
| x11grab->palette[i] = (color[i].red & 0xFF00) << 8 | |
| (color[i].green & 0xFF00) | |
| (color[i].blue & 0xFF00) >> 8; |
| x11grab->palette_changed = 1; |
| break; |
| case 16: |
| if ( image->red_mask == 0xf800 && |
| image->green_mask == 0x07e0 && |
| image->blue_mask == 0x001f ) { |
| av_log (s1, AV_LOG_DEBUG, "16 bit RGB565\n"); |
| input_pixfmt = AV_PIX_FMT_RGB565; |
| } else if (image->red_mask == 0x7c00 && |
| image->green_mask == 0x03e0 && |
| image->blue_mask == 0x001f ) { |
| av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n"); |
| input_pixfmt = AV_PIX_FMT_RGB555; |
| } else { |
| av_log(s1, AV_LOG_ERROR, "RGB ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel); |
| 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); |
| ret = AVERROR(EIO); |
| goto out; |
| } |
| break; |
| case 24: |
| if ( image->red_mask == 0xff0000 && |
| image->green_mask == 0x00ff00 && |
| image->blue_mask == 0x0000ff ) { |
| input_pixfmt = AV_PIX_FMT_BGR24; |
| } else if ( image->red_mask == 0x0000ff && |
| image->green_mask == 0x00ff00 && |
| image->blue_mask == 0xff0000 ) { |
| input_pixfmt = AV_PIX_FMT_RGB24; |
| } else { |
| av_log(s1, AV_LOG_ERROR,"rgb ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel); |
| 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); |
| ret = AVERROR(EIO); |
| goto out; |
| } |
| break; |
| case 32: |
| input_pixfmt = AV_PIX_FMT_0RGB32; |
| break; |
| default: |
| av_log(s1, AV_LOG_ERROR, "image depth %i not supported ... aborting\n", image->bits_per_pixel); |
| ret = AVERROR(EINVAL); |
| goto out; |
| } |
| |
| x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel/8; |
| x11grab->dpy = dpy; |
| x11grab->time_base = av_inv_q(x11grab->framerate); |
| x11grab->time_frame = av_gettime() / av_q2d(x11grab->time_base); |
| x11grab->x_off = x_off; |
| x11grab->y_off = y_off; |
| x11grab->image = image; |
| x11grab->use_shm = use_shm; |
| |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
| st->codec->width = x11grab->width; |
| st->codec->height = x11grab->height; |
| st->codec->pix_fmt = input_pixfmt; |
| st->codec->time_base = x11grab->time_base; |
| st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(x11grab->time_base) * 8; |
| |
| out: |
| av_free(dpyname); |
| return ret; |
| } |
| |
| /** |
| * Paint a mouse pointer in an X11 image. |
| * |
| * @param image image to paint the mouse pointer to |
| * @param s context used to retrieve original grabbing rectangle |
| * coordinates |
| */ |
| static void |
| paint_mouse_pointer(XImage *image, struct x11grab *s) |
| { |
| int x_off = s->x_off; |
| int y_off = s->y_off; |
| int width = s->width; |
| int height = s->height; |
| Display *dpy = s->dpy; |
| XFixesCursorImage *xcim; |
| int x, y; |
| int line, column; |
| int to_line, to_column; |
| int pixstride = image->bits_per_pixel >> 3; |
| /* Warning: in its insanity, xlib provides unsigned image data through a |
| * char* pointer, so we have to make it uint8_t to make things not break. |
| * Anyone who performs further investigation of the xlib API likely risks |
| * permanent brain damage. */ |
| uint8_t *pix = image->data; |
| Window w; |
| XSetWindowAttributes attr; |
| |
| /* Code doesn't currently support 16-bit or PAL8 */ |
| if (image->bits_per_pixel != 24 && image->bits_per_pixel != 32) |
| return; |
| |
| if(!s->c) |
| s->c = XCreateFontCursor(dpy, XC_left_ptr); |
| w = DefaultRootWindow(dpy); |
| attr.cursor = s->c; |
| XChangeWindowAttributes(dpy, w, CWCursor, &attr); |
| |
| xcim = XFixesGetCursorImage(dpy); |
| |
| x = xcim->x - xcim->xhot; |
| y = xcim->y - xcim->yhot; |
| |
| to_line = FFMIN((y + xcim->height), (height + y_off)); |
| to_column = FFMIN((x + xcim->width), (width + x_off)); |
| |
| for (line = FFMAX(y, y_off); line < to_line; line++) { |
| for (column = FFMAX(x, x_off); column < to_column; column++) { |
| int xcim_addr = (line - y) * xcim->width + column - x; |
| int image_addr = ((line - y_off) * width + column - x_off) * pixstride; |
| int r = (uint8_t)(xcim->pixels[xcim_addr] >> 0); |
| int g = (uint8_t)(xcim->pixels[xcim_addr] >> 8); |
| int b = (uint8_t)(xcim->pixels[xcim_addr] >> 16); |
| int a = (uint8_t)(xcim->pixels[xcim_addr] >> 24); |
| |
| if (a == 255) { |
| pix[image_addr+0] = r; |
| pix[image_addr+1] = g; |
| pix[image_addr+2] = b; |
| } else if (a) { |
| /* pixel values from XFixesGetCursorImage come premultiplied by alpha */ |
| pix[image_addr+0] = r + (pix[image_addr+0]*(255-a) + 255/2) / 255; |
| pix[image_addr+1] = g + (pix[image_addr+1]*(255-a) + 255/2) / 255; |
| pix[image_addr+2] = b + (pix[image_addr+2]*(255-a) + 255/2) / 255; |
| } |
| } |
| } |
| |
| XFree(xcim); |
| xcim = NULL; |
| } |
| |
| |
| /** |
| * Read new data in the image structure. |
| * |
| * @param dpy X11 display to grab from |
| * @param d |
| * @param image Image where the grab will be put |
| * @param x Top-Left grabbing rectangle horizontal coordinate |
| * @param y Top-Left grabbing rectangle vertical coordinate |
| * @return 0 if error, !0 if successful |
| */ |
| static int |
| xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y) |
| { |
| xGetImageReply rep; |
| xGetImageReq *req; |
| long nbytes; |
| |
| if (!image) { |
| return 0; |
| } |
| |
| LockDisplay(dpy); |
| GetReq(GetImage, req); |
| |
| /* First set up the standard stuff in the request */ |
| req->drawable = d; |
| req->x = x; |
| req->y = y; |
| req->width = image->width; |
| req->height = image->height; |
| req->planeMask = (unsigned int)AllPlanes; |
| req->format = ZPixmap; |
| |
| if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) { |
| UnlockDisplay(dpy); |
| SyncHandle(); |
| return 0; |
| } |
| |
| nbytes = (long)rep.length << 2; |
| _XReadPad(dpy, image->data, nbytes); |
| |
| UnlockDisplay(dpy); |
| SyncHandle(); |
| return 1; |
| } |
| |
| /** |
| * Grab a frame from x11 (public device demuxer API). |
| * |
| * @param s1 Context from avformat core |
| * @param pkt Packet holding the brabbed frame |
| * @return frame size in bytes |
| */ |
| static int |
| x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt) |
| { |
| struct x11grab *s = s1->priv_data; |
| Display *dpy = s->dpy; |
| XImage *image = s->image; |
| int x_off = s->x_off; |
| int y_off = s->y_off; |
| |
| int screen; |
| Window root; |
| int follow_mouse = s->follow_mouse; |
| |
| int64_t curtime, delay; |
| struct timespec ts; |
| |
| /* Calculate the time of the next frame */ |
| s->time_frame += INT64_C(1000000); |
| |
| /* wait based on the frame rate */ |
| for(;;) { |
| curtime = av_gettime(); |
| delay = s->time_frame * av_q2d(s->time_base) - curtime; |
| if (delay <= 0) { |
| if (delay < INT64_C(-1000000) * av_q2d(s->time_base)) { |
| s->time_frame += INT64_C(1000000); |
| } |
| break; |
| } |
| ts.tv_sec = delay / 1000000; |
| ts.tv_nsec = (delay % 1000000) * 1000; |
| nanosleep(&ts, NULL); |
| } |
| |
| av_init_packet(pkt); |
| pkt->data = image->data; |
| pkt->size = s->frame_size; |
| pkt->pts = curtime; |
| if (s->palette_changed) { |
| uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, |
| AVPALETTE_SIZE); |
| if (!pal) { |
| av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); |
| } else { |
| memcpy(pal, s->palette, AVPALETTE_SIZE); |
| s->palette_changed = 0; |
| } |
| } |
| |
| screen = DefaultScreen(dpy); |
| root = RootWindow(dpy, screen); |
| if (follow_mouse) { |
| int screen_w, screen_h; |
| int pointer_x, pointer_y, _; |
| Window w; |
| |
| screen_w = DisplayWidth(dpy, screen); |
| screen_h = DisplayHeight(dpy, screen); |
| XQueryPointer(dpy, root, &w, &w, &pointer_x, &pointer_y, &_, &_, &_); |
| if (follow_mouse == -1) { |
| // follow the mouse, put it at center of grabbing region |
| x_off += pointer_x - s->width / 2 - x_off; |
| y_off += pointer_y - s->height / 2 - y_off; |
| } else { |
| // follow the mouse, but only move the grabbing region when mouse |
| // reaches within certain pixels to the edge. |
| if (pointer_x > x_off + s->width - follow_mouse) { |
| x_off += pointer_x - (x_off + s->width - follow_mouse); |
| } else if (pointer_x < x_off + follow_mouse) |
| x_off -= (x_off + follow_mouse) - pointer_x; |
| if (pointer_y > y_off + s->height - follow_mouse) { |
| y_off += pointer_y - (y_off + s->height - follow_mouse); |
| } else if (pointer_y < y_off + follow_mouse) |
| y_off -= (y_off + follow_mouse) - pointer_y; |
| } |
| // adjust grabbing region position if it goes out of screen. |
| s->x_off = x_off = FFMIN(FFMAX(x_off, 0), screen_w - s->width); |
| s->y_off = y_off = FFMIN(FFMAX(y_off, 0), screen_h - s->height); |
| |
| if (s->show_region && s->region_win) |
| XMoveWindow(dpy, s->region_win, |
| s->x_off - REGION_WIN_BORDER, |
| s->y_off - REGION_WIN_BORDER); |
| } |
| |
| if (s->show_region) { |
| if (s->region_win) { |
| XEvent evt; |
| // clean up the events, and do the initinal draw or redraw. |
| for (evt.type = NoEventMask; XCheckMaskEvent(dpy, ExposureMask | StructureNotifyMask, &evt); ); |
| if (evt.type) |
| x11grab_draw_region_win(s); |
| } else { |
| x11grab_region_win_init(s); |
| } |
| } |
| |
| if(s->use_shm) { |
| if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes)) { |
| av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n"); |
| } |
| } else { |
| if (!xget_zpixmap(dpy, root, image, x_off, y_off)) { |
| av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n"); |
| } |
| } |
| |
| if (s->draw_mouse) { |
| paint_mouse_pointer(image, s); |
| } |
| |
| return s->frame_size; |
| } |
| |
| /** |
| * Close x11 frame grabber (public device demuxer API). |
| * |
| * @param s1 Context from avformat core |
| * @return 0 success, !0 failure |
| */ |
| static int |
| x11grab_read_close(AVFormatContext *s1) |
| { |
| struct x11grab *x11grab = s1->priv_data; |
| |
| /* Detach cleanly from shared mem */ |
| if (x11grab->use_shm) { |
| XShmDetach(x11grab->dpy, &x11grab->shminfo); |
| shmdt(x11grab->shminfo.shmaddr); |
| shmctl(x11grab->shminfo.shmid, IPC_RMID, NULL); |
| } |
| |
| /* Destroy X11 image */ |
| if (x11grab->image) { |
| XDestroyImage(x11grab->image); |
| x11grab->image = NULL; |
| } |
| |
| if (x11grab->region_win) { |
| XDestroyWindow(x11grab->dpy, x11grab->region_win); |
| } |
| |
| /* Free X11 display */ |
| XCloseDisplay(x11grab->dpy); |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(struct x11grab, x) |
| #define DEC AV_OPT_FLAG_DECODING_PARAM |
| static const AVOption options[] = { |
| { "draw_mouse", "draw the mouse pointer", OFFSET(draw_mouse), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC }, |
| |
| { "follow_mouse", "move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region", |
| OFFSET(follow_mouse), AV_OPT_TYPE_INT, {.i64 = 0}, -1, INT_MAX, DEC, "follow_mouse" }, |
| { "centered", "keep the mouse pointer at the center of grabbing region when following", |
| 0, AV_OPT_TYPE_CONST, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "follow_mouse" }, |
| |
| { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, 0, DEC }, |
| { "show_region", "show the grabbing region", OFFSET(show_region), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC }, |
| { "video_size", "set video frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC }, |
| { NULL }, |
| }; |
| |
| static const AVClass x11_class = { |
| .class_name = "X11grab indev", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| /** x11 grabber device demuxer declaration */ |
| AVInputFormat ff_x11grab_demuxer = { |
| .name = "x11grab", |
| .long_name = NULL_IF_CONFIG_SMALL("X11grab"), |
| .priv_data_size = sizeof(struct x11grab), |
| .read_header = x11grab_read_header, |
| .read_packet = x11grab_read_packet, |
| .read_close = x11grab_read_close, |
| .flags = AVFMT_NOFILE, |
| .priv_class = &x11_class, |
| }; |