/*
* 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 file is part of FFmpeg.
*
- * 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.
+ * FFmpeg integration:
+ * Copyright (C) 2006 Clemens Fruhwirth <clemens@endorphin.org>
+ * Edouard Gomez <ed.gomez@free.fr>
*
- * 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 grab.c:
+ * Copyright (c) 2000-2001 Fabrice Bellard
*
* This file contains code from the xvidcap project:
- * Copyright (C) 1997-98 Rasca, Berlin
- * Copyright (C) 2003,04 Karl H. Beckers, Frankfurt
+ * Copyright (C) 1997-1998 Rasca, Berlin
+ * 2003-2004 Karl H. Beckers, Frankfurt
*
- * This program is free software; you can redistribute it and/or modify
+ * 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.
*
- * This program is distributed in the hope that it will be useful,
+ * 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 this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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 x11grab.c
+ * X11 frame device demuxer by Clemens Fruhwirth <clemens@endorphin.org>
+ * and Edouard Gomez <ed.gomez@free.fr>.
*/
#include "avformat.h"
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
-typedef struct
+/**
+ * X11 Device Demuxer context
+ */
+typedef struct x11_grab_s
{
- 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;
+ int frame_size; /**< Size in bytes of a grabbed frame */
+ AVRational time_base; /**< Time base */
+ int64_t time_frame; /**< Current time */
+
+ int height; /**< Height of the grab frame */
+ int width; /**< Width 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 */
+} x11_grab_t;
+/**
+ * Initializes the x11 grab device demuxer (public device demuxer API).
+ *
+ * @param s1 Context from avformat core
+ * @param ap Parameters from avformat core
+ * @return <ul>
+ * <li>ENOMEM no memory left</li>
+ * <li>AVERROR_IO other failure case</li>
+ * <li>0 success</li>
+ * </ul>
+ */
static int
x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
- X11Grab *x11grab = s1->priv_data;
- Display *dpy;
- AVStream *st = NULL;
- int width, height;
- int frame_rate, frame_rate_base, frame_size;
- int input_pixfmt;
- XImage *image;
- int x_off=0; int y_off = 0;
- int use_shm;
-
- dpy = XOpenDisplay(NULL);
- if(!dpy) {
- goto fail;
- }
-
- sscanf(ap->device, "x11:%d,%d", &x_off, &y_off);
- av_log(s1, AV_LOG_INFO, "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) {
- av_log(s1, AV_LOG_ERROR, "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);
- av_log(s1, AV_LOG_INFO, "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) {
- av_log(s1, AV_LOG_ERROR, "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)) {
- av_log(s1, AV_LOG_ERROR, "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:
- av_log (s1, AV_LOG_DEBUG, "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 ) {
- av_log (s1, AV_LOG_DEBUG, "16 bit RGB565\n");
- input_pixfmt = PIX_FMT_RGB565;
- } else if ( image->red_mask == 0x7C00 &&
- image->green_mask == 0x03E0 &&
- image->blue_mask == 0x1F ) {
- av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n");
- input_pixfmt = 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);
- 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 {
- 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);
- return AVERROR_IO;
- }
- break;
- case 32:
+ x11_grab_t *x11grab = s1->priv_data;
+ Display *dpy;
+ AVStream *st = NULL;
+ int input_pixfmt;
+ XImage *image;
+ int x_off = 0;
+ int y_off = 0;
+ int use_shm;
+ char *param, *offset;
+
+ if (!ap->device) {
+ av_log(s1, AV_LOG_ERROR, "AVParameters don't specify any device. Use -vd.\n");
+ return AVERROR_IO;
+ }
+
+ param = strchr(ap->device, ':');
+ if (!param) {
+ av_free(st);
+ return AVERROR_IO;
+ }
+
+ param = av_strdup(param);
+ offset = strchr(param, '+');
+ if (offset) {
+ sscanf(offset, "%d,%d", &x_off, &y_off);
+ *offset= 0;
+ }
+
+ av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", ap->device, param, x_off, y_off, ap->width, ap->height);
+
+ dpy = XOpenDisplay(param);
+ if(!dpy) {
+ av_log(s1, AV_LOG_ERROR, "Could not open X display.\n");
+ return AVERROR_IO;
+ }
+
+ if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
+ av_log(s1, AV_LOG_ERROR, "AVParameters don't have any video size. Use -s.\n");
+ return AVERROR_IO;
+ }
+
+ st = av_new_stream(s1, 0);
+ if (!st) {
+ return -ENOMEM;
+ }
+ av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+
+ 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,
+ ap->width, ap->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");
+ return -ENOMEM;
+ }
+ 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 :) */
+ 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:
+ av_log (s1, AV_LOG_DEBUG, "8 bit palette\n");
+ input_pixfmt = PIX_FMT_PAL8;
+ 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 = 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 = 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);
+ return AVERROR_IO;
+ }
+ break;
+ case 24:
+ if ( image->red_mask == 0xff0000 &&
+ image->green_mask == 0x00ff00 &&
+ image->blue_mask == 0x0000ff ) {
+ input_pixfmt = PIX_FMT_BGR24;
+ } else if ( image->red_mask == 0x0000ff &&
+ image->green_mask == 0x00ff00 &&
+ image->blue_mask == 0xff0000 ) {
+ input_pixfmt = 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);
+ 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 {
- av_log(s1, AV_LOG_ERROR,"image depth %i not supported ... aborting\n", image->bits_per_pixel);
- return AVERROR_IO;
- }
+ GetColorInfo (image, &c_info);
+ if ( c_info.alpha_mask == 0xff000000 && image->green_mask == 0x0000ff00) {
+ /* 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 {
+ av_log(s1, AV_LOG_ERROR,"image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ return AVERROR_IO;
+ }
#endif
- input_pixfmt = PIX_FMT_RGBA32;
- break;
- default:
- av_log(s1, AV_LOG_ERROR, "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);
- return AVERROR_IO;
-}
+ input_pixfmt = PIX_FMT_RGBA32;
+ break;
+ default:
+ av_log(s1, AV_LOG_ERROR, "image depth %i not supported ... aborting\n", image->bits_per_pixel);
+ return -1;
+ }
-static uint16_t mousePointerBlack[] =
-{
- 0, 49152, 40960, 36864, 34816, 33792, 33280, 33024, 32896, 32832,
- 33728, 37376, 43264, 51456, 1152, 1152, 576, 576, 448, 0
-};
+ x11grab->frame_size = ap->width * ap->height * image->bits_per_pixel/8;
+ x11grab->dpy = dpy;
+ x11grab->width = ap->width;
+ x11grab->height = ap->height;
+ x11grab->time_base = ap->time_base;
+ x11grab->time_frame = av_gettime() / av_q2d(ap->time_base);
+ x11grab->x_off = x_off;
+ x11grab->y_off = y_off;
+ x11grab->image = image;
+ x11grab->use_shm = use_shm;
-static uint16_t mousePointerWhite[] =
-{
- 0, 0, 16384, 24576, 28672, 30720, 31744, 32256, 32512, 32640, 31744,
- 27648, 17920, 1536, 768, 768, 384, 384, 0, 0
-};
+ st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_RAWVIDEO;
+ st->codec->width = ap->width;
+ st->codec->height = ap->height;
+ st->codec->pix_fmt = input_pixfmt;
+ st->codec->time_base = ap->time_base;
+ st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(ap->time_base) * 8;
+
+ return 0;
+}
+/**
+ * Get pointer coordinates from X11.
+ *
+ * @param x Integer where horizontal coordinate will be returned
+ * @param y Integer where vertical coordinate will be returned
+ * @param dpy X11 display from where pointer coordinates are retrieved
+ * @param s1 Context used for logging errors if necessary
+ */
static void
-getCurrentPointer(AVFormatContext *s1, X11Grab *s, int *x, int *y)
+get_pointer_coordinates(int *x, int *y, Display *dpy, AVFormatContext *s1)
{
- Window mrootwindow, childwindow;
- int dummy;
- Display *dpy = s->dpy;
-
- mrootwindow = DefaultRootWindow(dpy);
-
- if (XQueryPointer(dpy, mrootwindow, &mrootwindow, &childwindow,
- x, y, &dummy, &dummy, (unsigned int*)&dummy)) {
- } else {
- av_log(s1, AV_LOG_INFO, "couldn't find mouse pointer\n");
- *x = -1;
- *y = -1;
- }
+ Window mrootwindow, childwindow;
+ int dummy;
+
+ mrootwindow = DefaultRootWindow(dpy);
+
+ if (XQueryPointer(dpy, mrootwindow, &mrootwindow, &childwindow,
+ x, y, &dummy, &dummy, (unsigned int*)&dummy)) {
+ } else {
+ av_log(s1, AV_LOG_INFO, "couldn't find mouse pointer\n");
+ *x = -1;
+ *y = -1;
+ }
}
-#define DRAW_CURSOR_TEMPLATE(type_t) \
-do { \
-type_t *cursor; \
-int width_cursor; \
-uint16_t bm_b, bm_w, mask; \
-\
-for (line = 0; line < min(20, (y_off + height) - *y); 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 = (type_t*) im_data, width_cursor = 0; \
- ((width_cursor + *x) < (width + x_off) && width_cursor < 16); \
- cursor++, width_cursor++) { \
- 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; \
- } \
- im_data += image->bytes_per_line; \
-} \
-} while (0)
+/**
+ * Mouse painting helper function that applies an 'and' and 'or' mask pair to
+ * '*dst' pixel. It actually draws a mouse pointer pixel to grabbed frame.
+ *
+ * @param dst Destination pixel
+ * @param and Part of the mask that must be applied using a bitwise 'and'
+ * operator
+ * @param or Part of the mask that must be applied using a bitwise 'or'
+ * operator
+ * @param bits_per_pixel Bits per pixel used in the grabbed image
+ */
+static void inline
+apply_masks(uint8_t *dst, int and, int or, int bits_per_pixel)
+{
+ switch (bits_per_pixel) {
+ case 32:
+ *(uint32_t*)dst = (*(uint32_t*)dst & and) | or;
+ break;
+ case 16:
+ *(uint16_t*)dst = (*(uint16_t*)dst & and) | or;
+ break;
+ case 8:
+ *dst = !!or;
+ break;
+ }
+}
+/**
+ * Paints a mouse pointer in an X11 image.
+ *
+ * @param image Image where to paint the mouse pointer
+ * @param s context used to retrieve original grabbing rectangle
+ * coordinates
+ * @param x Mouse pointer coordinate
+ * @param y Mouse pointer coordinate
+ */
static void
-paintMousePointer(AVFormatContext *s1, X11Grab *s, int *x, int *y, XImage *image)
+paint_mouse_pointer(XImage *image, x11_grab_t *s, int x, int y)
{
- 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 = (uint8_t*)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:
- DRAW_CURSOR_TEMPLATE(uint32_t);
- break;
- case 16:
- DRAW_CURSOR_TEMPLATE(uint16_t);
- break;
- default:
- /* XXX: How do we deal with 24bit and 8bit modes ? */
- break;
- }
- }
+ /* 16x20x1bpp bitmap for the black channel of the mouse pointer */
+ static const uint16_t const mousePointerBlack[] =
+ {
+ 0x0000, 0x0003, 0x0005, 0x0009, 0x0011,
+ 0x0021, 0x0041, 0x0081, 0x0101, 0x0201,
+ 0x03c1, 0x0049, 0x0095, 0x0093, 0x0120,
+ 0x0120, 0x0240, 0x0240, 0x0380, 0x0000
+ };
+
+ /* 16x20x1bpp bitmap for the white channel of the mouse pointer */
+ static const uint16_t const mousePointerWhite[] =
+ {
+ 0x0000, 0x0000, 0x0002, 0x0006, 0x000e,
+ 0x001e, 0x003e, 0x007e, 0x00fe, 0x01fe,
+ 0x003e, 0x0036, 0x0062, 0x0060, 0x00c0,
+ 0x00c0, 0x0180, 0x0180, 0x0000, 0x0000
+ };
+
+ 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) {
+ uint8_t *im_data = (uint8_t*)image->data;
+ int bytes_per_pixel;
+ int line;
+ int masks;
+
+ /* Select correct masks and pixel size */
+ if (image->bits_per_pixel == 8) {
+ masks = 1;
+ } else {
+ masks = (image->red_mask|image->green_mask|image->blue_mask);
+ }
+ bytes_per_pixel = image->bits_per_pixel>>3;
+
+ /* Shift to right line */
+ im_data += image->bytes_per_line * (y - y_off);
+ /* Shift to right pixel in the line */
+ im_data += bytes_per_pixel * (x - x_off);
+
+ /* Draw the cursor - proper loop */
+ for (line = 0; line < FFMIN(20, (y_off + height) - y); line++) {
+ uint8_t *cursor = im_data;
+ int column;
+ uint16_t bm_b;
+ uint16_t bm_w;
+
+ bm_b = mousePointerBlack[line];
+ bm_w = mousePointerWhite[line];
+
+ for (column = 0; column < FFMIN(16, (x_off + width) - x); column++) {
+ apply_masks(cursor, ~(masks*(bm_b&1)), masks*(bm_w&1),
+ image->bits_per_pixel);
+ cursor += bytes_per_pixel;
+ bm_b >>= 1;
+ bm_w >>= 1;
+ }
+ im_data += image->bytes_per_line;
+ }
+ }
}
-/*
- * just read new data in the image structure, the image
- * structure inclusive the data area must be allocated before
+/**
+ * Reads 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
-XGetZPixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
+xget_zpixmap(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) {
+ 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 (False);
- }
-
- nbytes = (long)rep.length << 2;
- _XReadPad(dpy, image->data, nbytes);
-
- UnlockDisplay(dpy);
- SyncHandle();
- return (True);
+ return 1;
}
+/**
+ * Grabs 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)
{
- 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");
+ x11_grab_t *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_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);
+ }
+
+ if (av_new_packet(pkt, s->frame_size) < 0) {
+ return AVERROR_IO;
+ }
+
+ pkt->pts = curtime;
+
+ if(s->use_shm) {
+ if (!XShmGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off, AllPlanes)) {
+ av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n");
+ }
+ } else {
+ if (!xget_zpixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off)) {
+ av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n");
+ }
+ }
+
+ {
+ int pointer_x, pointer_y;
+ get_pointer_coordinates(&pointer_x, &pointer_y, dpy, s1);
+ paint_mouse_pointer(image, s, pointer_x, pointer_y);
}
- }
- 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;
+
+
+ /* XXX: avoid memcpy */
+ memcpy(pkt->data, image->data, s->frame_size);
+ return s->frame_size;
}
+/**
+ * Closes 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)
{
- X11Grab *x11grab = s1->priv_data;
-
- XCloseDisplay(x11grab->dpy);
- return 0;
+ x11_grab_t *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;
+ }
+
+ /* Free X11 display */
+ 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,
+/** x11 grabber device demuxer declaration */
+AVInputFormat x11_grab_device_demuxer =
+{
+ "x11grab",
+ "X11grab",
+ sizeof(x11_grab_t),
+ NULL,
+ x11grab_read_header,
+ x11grab_read_packet,
+ x11grab_read_close,
+ .flags = AVFMT_NOFILE,
};
projects / ffmpeg / blobdiff