+/*
+ * X11 video grab interface
+ * Copyright (c) 2006 Clemens Fruhwirth
+ *
+ * A quick note on licensing. This file is a mixture of LGPL code
+ * (ffmpeg) and GPL code (xvidcap). The result is a file that must
+ * abid both licenses. As they are compatible and GPL is more
+ * strict, this code has an "effective" GPL license.
+ *
+ * This file contains code from grab.c:
+ * Copyright (c) 2000,2001 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This file contains code from the xvidcap project:
+ * Copyright (C) 1997-98 Rasca, Berlin
+ * Copyright (C) 2003,04 Karl H. Beckers, Frankfurt
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include "avformat.h"
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#define _LINUX_TIME_H 1
+#include <time.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Xlibint.h>
+#include <X11/Xproto.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <X11/extensions/XShm.h>
+
+
+typedef struct {
+ Display *dpy;
+ int frame_format;
+ int frame_size;
+ int frame_rate;
+ int frame_rate_base;
+ int64_t time_frame;
+
+ int height;
+ int width;
+ int x_off;
+ int y_off;
+ XImage *image;
+ int use_shm;
+ XShmSegmentInfo shminfo;
+ int mouse_wanted;
+} X11Grab;
+
+static int x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
+{
+ X11Grab *x11grab=s1->priv_data;
+ Display *dpy;
+ AVStream *st;
+ int width, height;
+ int frame_rate, frame_rate_base, frame_size;
+ int input_pixfmt;
+ XImage *image;
+ int x_off=0; int y_off = 0;
+ char *device_parsing = strdup(ap->device);
+ int use_shm;
+
+ dpy = XOpenDisplay(NULL);
+
+ if(!dpy)
+ goto fail;
+
+ sscanf(device_parsing,"x11:%d,%d",&x_off, &y_off);
+ fprintf(stderr,"device: %s -> x: %d y: %d width: %d height: %d\n", ap->device, x_off, y_off, ap->width, ap->height);
+
+ if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
+ fprintf(stderr,"x11grab: AVParameters don't have any video size. Use -s.\n");
+ return AVERROR_IO;
+ }
+ width = ap->width;
+ height = ap->height;
+ frame_rate = ap->time_base.den;
+ frame_rate_base = ap->time_base.num;
+
+ st = av_new_stream(s1, 0);
+ if (!st)
+ return -ENOMEM;
+ av_set_pts_info(st, 48, 1, 1000000); /* 48 bits pts in us */
+
+ use_shm = XShmQueryExtension(dpy);
+ fprintf(stderr,"x11grab: shared memory extension %s\n",use_shm?"found":"not found");
+ if(use_shm) {
+ int scr = XDefaultScreen(dpy);
+ image = XShmCreateImage(dpy,
+ DefaultVisual(dpy,scr),
+ DefaultDepth(dpy,scr),
+ ZPixmap, NULL,
+ &x11grab->shminfo, ap->width, ap->height);
+ x11grab->shminfo.shmid = shmget(IPC_PRIVATE,
+ image->bytes_per_line * image->height, IPC_CREAT|0777);
+ if (x11grab->shminfo.shmid == -1) {
+ fprintf(stderr,"Fatal: Can't get shared memory!\n");
+ return -ENOMEM;
+ }
+ x11grab->shminfo.shmaddr = image->data = shmat(x11grab->shminfo.shmid, 0, 0);
+ x11grab->shminfo.readOnly = False;
+
+ if (XShmAttach(dpy, &x11grab->shminfo) == 0) {
+ fprintf(stderr,"Fatal: Failed to attach shared memory!\n");
+ /* needs some better error subroutine :) */
+ return AVERROR_IO;
+ }
+ }
+ else {
+ image = XGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)),
+ x_off,y_off,
+ ap->width,ap->height,
+ AllPlanes, ZPixmap);
+ }
+
+ switch (image->bits_per_pixel) {
+ case 8:
+ fprintf (stderr, "x11grab: 8 bit pallete\n");
+ input_pixfmt = PIX_FMT_PAL8;
+ break;
+ case 16:
+ if ( image->red_mask == 0xF800 && image->green_mask == 0x07E0
+ && image->blue_mask == 0x1F ) {
+ fprintf (stderr, "x11grab: 16 bit RGB565\n");
+ input_pixfmt = PIX_FMT_RGB565;
+ } else if ( image->red_mask == 0x7C00 &&
+ image->green_mask == 0x03E0 &&
+ image->blue_mask == 0x1F ) {
+ fprintf (stderr, "x11grab: 16 bit RGB555\n");
+ input_pixfmt = PIX_FMT_RGB555;
+ } else {
+ fprintf (stderr, "x11grab: RGB ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ fprintf (stderr, "x11grab: color masks: r 0x%.6X g 0x%.6X b 0x%.6X\n", image->red_mask, image->green_mask, image->blue_mask);
+ return AVERROR_IO;
+ }
+ break;
+ case 24:
+ if ( image->red_mask == 0xFF0000 &&
+ image->green_mask == 0xFF00
+ && image->blue_mask == 0xFF ) {
+ input_pixfmt = PIX_FMT_BGR24;
+ } else if ( image->red_mask == 0xFF && image->green_mask == 0xFF00
+ && image->blue_mask == 0xFF0000 ) {
+ input_pixfmt = PIX_FMT_RGB24;
+ } else {
+ fprintf (stderr, "xtoffmpeg.XImageToFFMPEG(): rgb ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ fprintf (stderr, "xtoffmpeg.XImageToFFMPEG(): color masks: r 0x%.6X g 0x%.6X b 0x%.6X\n", image->red_mask, image->green_mask, image->blue_mask);
+ return AVERROR_IO;
+ }
+ break;
+ case 32:
+#if 0
+ GetColorInfo (image, &c_info);
+ if ( c_info.alpha_mask == 0xFF000000 && image->green_mask == 0xFF00 ) {
+ // byte order is relevant here, not endianness
+ // endianness is handled by avcodec, but atm no such thing
+ // as having ABGR, instead of ARGB in a word. Since we
+ // need this for Solaris/SPARC, but need to do the conversion
+ // for every frame we do it outside of this loop, cf. below
+ // this matches both ARGB32 and ABGR32
+ input_pixfmt = PIX_FMT_ARGB32;
+ } else {
+ fprintf (stderr, "xtoffmpeg.XImageToFFMPEG(): image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ return AVERROR_IO;
+ }
+#endif
+ input_pixfmt = PIX_FMT_RGBA32;
+ break;
+ default:
+ fprintf (stderr, "xtoffmpeg.XImageToFFMPEG(): image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ return -1;
+ }
+
+ frame_size = width * height * image->bits_per_pixel/8;
+ x11grab->frame_size = frame_size;
+ x11grab->dpy = dpy;
+ x11grab->width = ap->width;
+ x11grab->height = ap->height;
+ x11grab->frame_rate = frame_rate;
+ x11grab->frame_rate_base = frame_rate_base;
+ x11grab->time_frame = av_gettime() * frame_rate / frame_rate_base;
+ x11grab->x_off = x_off;
+ x11grab->y_off = y_off;
+ x11grab->image = image;
+ x11grab->use_shm = use_shm;
+ x11grab->mouse_wanted = 1;
+
+ st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_RAWVIDEO;
+ st->codec->width = width;
+ st->codec->height = height;
+ st->codec->pix_fmt = input_pixfmt;
+ st->codec->time_base.den = frame_rate;
+ st->codec->time_base.num = frame_rate_base;
+ st->codec->bit_rate = frame_size * 1/av_q2d(st->codec->time_base) * 8;
+
+ return 0;
+ fail:
+ av_free(st);
+ av_free(device_parsing);
+ return AVERROR_IO;
+}
+
+uint16_t mousePointerBlack[] = { 0, 49152, 40960, 36864, 34816, 33792, 33280, 33024, 32896, 32832,
+33728, 37376, 43264, 51456, 1152, 1152, 576, 576, 448, 0 };
+uint16_t mousePointerWhite[] = { 0, 0, 16384, 24576, 28672, 30720, 31744, 32256, 32512, 32640, 31744,
+27648, 17920, 1536, 768, 768, 384, 384, 0, 0 };
+
+static void getCurrentPointer(X11Grab *s, int *x, int *y) {
+ Window mrootwindow, childwindow;
+ int dummy;
+ Display *dpy = s->dpy;
+
+ mrootwindow = DefaultRootWindow(dpy);
+
+ if (XQueryPointer(dpy, mrootwindow, &mrootwindow, &childwindow,
+ x, y, &dummy, &dummy, &dummy)) {
+ } else {
+ fprintf(stderr,"couldn't find mouse pointer\n");
+ *x = -1;
+ *y = -1;
+ }
+}
+
+static void paintMousePointer(X11Grab *s, int *x, int *y, XImage *image) {
+ int x_off = s->x_off;
+ int y_off = s->y_off;
+ int width = s->width;
+ int height = s->height;
+
+ if ((*x - x_off) >= 0 &&
+ *x < (width + x_off) &&
+ (*y - y_off) >= 0 &&
+ *y < (height + y_off) ) {
+ int line;
+ uint8_t *im_data = image->data;
+
+ im_data += (image->bytes_per_line * (*y - y_off)); // shift to right line
+ im_data += (image->bits_per_pixel / 8 * (*x - x_off)); // shift to right pixel
+
+ switch(image->bits_per_pixel) {
+ case 32:
+ {
+ uint32_t *cursor;
+ int width_cursor;
+ uint16_t bm_b, bm_w, mask;
+
+ for (line = 0; line < 20; line++ ) {
+ if (s->mouse_wanted == 1) {
+ bm_b = mousePointerBlack[line];
+ bm_w = mousePointerWhite[line];
+ } else {
+ bm_b = mousePointerWhite[line];
+ bm_w = mousePointerBlack[line];
+ }
+ mask = ( 0x0001 << 15 );
+
+ for (cursor = (uint32_t*) im_data, width_cursor = 0;
+ ((width_cursor + *x) < (width + x_off) && width_cursor < 16);
+ cursor++, width_cursor++) {
+ // Boolean pointer_b_bit, pointer_w_bit;
+ // pointer_b_bit = ( ( bm_b & mask ) > 0 );
+ // pointer_w_bit = ( ( bm_w & mask ) > 0 );
+ // printf("%i ", pointer_b_bit, pointer_w_bit );
+
+ if ( ( bm_b & mask ) > 0 ) {
+ *cursor &= ((~ image->red_mask) & (~ image->green_mask) & (~image->blue_mask ));
+ } else if ( ( bm_w & mask ) > 0 ) {
+ *cursor |= (image->red_mask | image->green_mask | image->blue_mask );
+ }
+ mask >>= 1;
+ }
+ // printf("\n");
+ im_data += image->bytes_per_line;
+ }
+ }
+ break;
+#if 0
+ case 24: // not sure this can occur at all ..........
+ fprintf(stderr,"input image bits_per_pixel %i not implemented with mouse pointer capture ... aborting!\n",
+ image->bits_per_pixel);
+ fprintf(stderr,"Please file a bug at http://www.sourceforge.net/projects/xvidcap/\n");
+ exit(1);
+ break;
+ case 16: {
+ uint16_t *cursor;
+ int width;
+ uint16_t bm_b, bm_w, mask;
+
+ for (line = 0; line < 16; line++ ) {
+ if (mjob->mouseWanted == 1) {
+ bm_b = mousePointerBlack[line];
+ bm_w = mousePointerWhite[line];
+ } else {
+ bm_b = mousePointerWhite[line];
+ bm_w = mousePointerBlack[line];
+ }
+ mask = ( 0x0001 << 15 );
+
+ for (cursor = (uint16_t*) im_data, width = 0;
+ ((width + *x) < (mjob->area->width + mjob->area->x)&&width < 6);
+ cursor++, width++) {
+ // Boolean pointer_b_bit, pointer_w_bit;
+
+ // pointer_b_bit = ( ( bm_b & mask ) > 0 );
+ // pointer_w_bit = ( ( bm_w & mask ) > 0 );
+ // printf("%i ", pointer_b_bit, pointer_w_bit );
+
+ if ( ( bm_b & mask ) > 0 ) {
+ *cursor &= ((~ image->red_mask) & (~ image->green_mask) & (~
+ image->blue_mask ));
+ } else if ( ( bm_w & mask ) > 0 ) {
+ *cursor |= (image->red_mask | image->green_mask | image->blue_mask );
+ }
+ mask >>= 1;
+
+ }
+ // printf("\n");
+
+ im_data += image->bytes_per_line;
+ }
+ }
+ break;
+ case 8: {
+ uint8_t *cursor;
+ int width;
+ uint16_t bm_b, bm_w, mask;
+
+ for (line = 0; line < 16; line++ ) {
+ if (mjob->mouseWanted == 1) {
+ bm_b = mousePointerBlack[line];
+ bm_w = mousePointerWhite[line];
+ } else {
+ bm_b = mousePointerWhite[line];
+ bm_w = mousePointerBlack[line];
+ }
+ mask = ( 0x0001 << 15 );
+
+ for (cursor = im_data, width = 0;
+ ((width + *x) < (mjob->area->width + mjob->area->x)&&width < 6);
+ cursor++, width++) {
+ // Boolean pointer_b_bit, pointer_w_bit;
+
+ // pointer_b_bit = ( ( bm_b & mask ) > 0 );
+ // pointer_w_bit = ( ( bm_w & mask ) > 0 );
+ // printf("%i ", pointer_b_bit, pointer_w_bit );
+
+ if ( ( bm_b & mask ) > 0 ) {
+ *cursor = 0;
+ } else if ( ( bm_w & mask ) > 0 ) {
+ *cursor = 1;
+ }
+ mask >>= 1;
+
+ }
+ // printf("\n");
+
+ im_data += image->bytes_per_line;
+ }
+ }
+ break;
+ default:
+ fprintf(stderr,"input image bits_per_pixel %i not supported with mouse pointer capture ... aborting!\n",
+ image->bits_per_pixel);
+ exit(1);
+
+#endif
+ }
+ }
+}
+
+
+/*
+ * just read new data in the image structure, the image
+ * structure inclusive the data area must be allocated before
+ */
+static int
+XGetZPixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
+{
+ xGetImageReply rep;
+ xGetImageReq *req;
+ long nbytes;
+
+ if (!image)
+ return (False);
+ 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 = AllPlanes;
+ req->format = ZPixmap;
+
+ if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0 ||
+ rep.length == 0) {
+ UnlockDisplay(dpy);
+ SyncHandle();
+ return (False);
+ }
+
+ nbytes = (long)rep.length << 2;
+ _XReadPad(dpy, image->data, nbytes);
+
+ UnlockDisplay(dpy);
+ SyncHandle();
+ return (True);
+}
+
+static int x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+ 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;
+
+ int64_t curtime, delay;
+ struct timespec ts;
+
+ /* Calculate the time of the next frame */
+ s->time_frame += int64_t_C(1000000);
+
+ /* wait based on the frame rate */
+ for(;;) {
+ curtime = av_gettime();
+ delay = s->time_frame * s->frame_rate_base / s->frame_rate - curtime;
+ if (delay <= 0) {
+ if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {
+ /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
+ s->time_frame += int64_t_C(1000000);
+ }
+ break;
+ }
+ ts.tv_sec = delay / 1000000;
+ ts.tv_nsec = (delay % 1000000) * 1000;
+ nanosleep(&ts, NULL);
+ }
+
+ if (av_new_packet(pkt, s->frame_size) < 0)
+ return AVERROR_IO;
+
+ pkt->pts = curtime & ((1LL << 48) - 1);
+
+ if(s->use_shm) {
+ if (!XShmGetImage(dpy,
+ RootWindow(dpy, DefaultScreen(dpy)),
+ image, x_off, y_off, AllPlanes)) {
+ fprintf(stderr,"XShmGetImage() failed\n");
+ }
+ }
+ else {
+ XGetZPixmap(dpy,
+ RootWindow(dpy, DefaultScreen(dpy)),
+ image, x_off, y_off);
+ };
+ {
+ int pointer_x, pointer_y;
+ getCurrentPointer(s, &pointer_x, &pointer_y);
+ paintMousePointer(s, &pointer_x, &pointer_y, image);
+ }
+
+#warning FIXME - avoid memcpy
+ memcpy(pkt->data, image->data, s->frame_size);
+ return s->frame_size;
+}
+
+static int x11grab_read_close(AVFormatContext *s1)
+{
+ X11Grab *x11grab = s1->priv_data;
+
+ XCloseDisplay(x11grab->dpy);
+ return 0;
+}
+
+AVInputFormat x11_grab_device_demuxer = {
+ "x11grab",
+ "X11grab",
+ sizeof(X11Grab),
+ NULL,
+ x11grab_read_header,
+ x11grab_read_packet,
+ x11grab_read_close,
+ .flags = AVFMT_NOFILE,
+};
projects / platform / upstream / libav.git / commitdiff