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502 lines
14 KiB
502 lines
14 KiB
/*
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* x11source.c - X11/transcode bridge code, allowing screen capture.
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* (C) 2006-2010 - Francesco Romani <fromani -at- gmail -dot- com>
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*
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* This file is part of transcode, a video stream processing tool.
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*
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* transcode is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* transcode is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include "transcode.h"
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#include "magic.h"
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#include "x11source.h"
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#include "libtc/ratiocodes.h"
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#include "libtc/tccodecs.h"
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#include "libtc/tcframes.h"
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#include "libtcvideo/tcvideo.h"
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/*
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* TODO:
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* - internal docs
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* - internla refactoring to properly grab cursor
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*/
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#ifdef HAVE_X11
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/*************************************************************************/
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/* cursor grabbing support. */
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#ifdef HAVE_X11_FIXES
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#include <X11/extensions/Xfixes.h>
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static void tc_x11source_acquire_cursor_fixes(TCX11Source *handle,
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uint8_t *data, int maxdata)
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{
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XFixesCursorImage *cursor = XFixesGetCursorImage(handle->dpy);
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if (cursor == NULL) {
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/* this MUST be noisy! */
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tc_log_warn(__FILE__, "failed to get cursor image");
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} else {
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/* FIXME: this has to be rewritten and need significant
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* internal refactoring :( */
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}
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}
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#endif /* HAVE_X11_FIXES */
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/* FIXME: explain why don't use funcpointers in here */
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static void tc_x11source_acquire_cursor_plain(TCX11Source *handle,
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uint8_t *data, int maxdata)
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{
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static int warn = 0;
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if (!warn) {
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tc_log_warn(__FILE__, "cursor grabbing not supported!");
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warn = 1;
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}
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}
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static void tc_x11source_init_cursor(TCX11Source *handle)
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{
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/* sane default if we don't have any better */
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handle->acquire_cursor = tc_x11source_acquire_cursor_plain;
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#ifdef HAVE_X11_FIXES
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handle->acquire_cursor = tc_x11source_acquire_cursor_fixes;
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#endif
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}
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/*************************************************************************/
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int tc_x11source_is_display_name(const char *name)
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{
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if (name != NULL && strlen(name) != 0) {
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uint32_t disp, screen;
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int ret = sscanf(name, ":%u.%u", &disp, &screen);
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if (ret == 2) {
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/* looks like a display specifier */
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return TC_TRUE;
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}
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}
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return TC_FALSE;
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}
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int tc_x11source_probe(TCX11Source *handle, ProbeInfo *info)
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{
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if (handle != NULL && info != NULL) {
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info->width = handle->width;
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info->height = handle->height;
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info->codec = handle->out_fmt;
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info->magic = TC_MAGIC_X11; /* enforce */
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info->asr = 1; /* force 1:1 ASR (XXX) */
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/* FPS/FRC MUST BE choosed by user; that's only a kind suggestion */
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info->fps = 10.0;
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tc_frc_code_from_value(&info->frc, info->fps);
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info->num_tracks = 0; /* no audio, here */
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return 0;
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}
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return 1;
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}
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/*************************************************************************/
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static int tc_x11source_acquire_image_plain(TCX11Source *handle,
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uint8_t *data, int maxdata)
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{
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int size = -1;
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/* but draw such areas if windows are opaque */
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/* FIXME: switch to XCreateImage? */
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handle->image = XGetImage(handle->dpy, handle->pix, 0, 0,
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handle->width, handle->height,
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AllPlanes, ZPixmap);
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if (handle->image == NULL || handle->image->data == NULL) {
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tc_log_error(__FILE__, "cannot get X image");
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} else {
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size = (int)tc_video_frame_size(handle->image->width,
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handle->image->height,
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handle->out_fmt);
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if (size <= maxdata) {
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tcv_convert(handle->tcvhandle, handle->image->data, data,
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handle->image->width, handle->image->height,
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IMG_BGRA32, handle->conv_fmt);
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} else {
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size = 0;
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}
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XDestroyImage(handle->image);
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}
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return size;
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}
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static int tc_x11source_fini_plain(TCX11Source *handle)
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{
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return 0;
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}
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static int tc_x11source_init_plain(TCX11Source *handle)
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{
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handle->acquire_image = tc_x11source_acquire_image_plain;
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handle->fini = tc_x11source_fini_plain;
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return 0;
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}
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/*************************************************************************/
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#ifdef HAVE_X11_SHM
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static int tc_x11source_acquire_image_shm(TCX11Source *handle,
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uint8_t *data, int maxdata)
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{
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int size = -1;
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Status ret;
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/* but draw such areas if windows are opaque */
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ret = XShmGetImage(handle->dpy, handle->pix, handle->image,
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0, 0, AllPlanes);
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if (!ret || handle->image == NULL || handle->image->data == NULL) {
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tc_log_error(__FILE__, "cannot get X image (using SHM)");
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} else {
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size = (int)tc_video_frame_size(handle->image->width,
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handle->image->height,
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handle->out_fmt);
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if (size <= maxdata) {
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tcv_convert(handle->tcvhandle, handle->image->data, data,
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handle->image->width, handle->image->height,
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IMG_BGRA32, handle->conv_fmt);
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} else {
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size = 0;
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}
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}
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return size;
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}
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static int tc_x11source_fini_shm(TCX11Source *handle)
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{
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Status ret = XShmDetach(handle->dpy, &handle->shm_info);
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if (!ret) { /* XXX */
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tc_log_error(__FILE__, "failed to attach SHM from Xserver");
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return -1;
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}
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XDestroyImage(handle->image);
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handle->image = NULL;
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XSync(handle->dpy, False); /* XXX */
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if (shmdt(handle->shm_info.shmaddr) != 0) {
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tc_log_error(__FILE__, "failed to destroy shared memory segment");
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return -1;
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}
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return 0;
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}
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static int tc_x11source_init_shm(TCX11Source *handle)
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{
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Status ret;
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ret = XMatchVisualInfo(handle->dpy, handle->screen, handle->depth,
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DirectColor, &handle->vis_info);
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if (!ret) {
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tc_log_error(__FILE__, "Can't match visual information");
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goto xshm_failed;
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}
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handle->image = XShmCreateImage(handle->dpy, handle->vis_info.visual,
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handle->depth, ZPixmap,
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NULL, &handle->shm_info,
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handle->width, handle->height);
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if (handle->image == NULL) {
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tc_log_error(__FILE__, "XShmCreateImage failed.");
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goto xshm_failed_image;
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}
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handle->shm_info.shmid = shmget(IPC_PRIVATE,
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handle->image->bytes_per_line * handle->image->height,
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IPC_CREAT | 0777);
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if (handle->shm_info.shmid < 0) {
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tc_log_error(__FILE__, "failed to create shared memory segment");
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goto xshm_failed_image;
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}
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handle->shm_info.shmaddr = shmat(handle->shm_info.shmid, NULL, 0);
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if (handle->shm_info.shmaddr == (void*)-1) {
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tc_log_error(__FILE__, "failed to attach shared memory segment");
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goto xshm_failed_image;
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}
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shmctl(handle->shm_info.shmid, IPC_RMID, 0); /* XXX */
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handle->image->data = handle->shm_info.shmaddr;
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handle->shm_info.readOnly = False;
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ret = XShmAttach(handle->dpy, &handle->shm_info);
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if (!ret) {
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tc_log_error(__FILE__, "failed to attach SHM to Xserver");
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goto xshm_failed_image;
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}
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XSync(handle->dpy, False);
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handle->mode = TC_X11_MODE_SHM;
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handle->acquire_image = tc_x11source_acquire_image_shm;
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handle->fini = tc_x11source_fini_shm;
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return 0;
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xshm_failed_image:
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XDestroyImage(handle->image);
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handle->image = NULL;
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xshm_failed:
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return -1;
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}
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/*************************************************************************/
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#endif /* X11_SHM */
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static int tc_x11source_map_format(TCX11Source *handle, uint32_t format)
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{
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int ret = -1;
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if (handle != NULL) {
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ret = 0;
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switch (format) {
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case CODEC_RGB: /* compatibility */
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case TC_CODEC_RGB:
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handle->out_fmt = TC_CODEC_RGB;
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handle->conv_fmt = IMG_RGB24;
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if (verbose >= TC_DEBUG) {
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tc_log_info(__FILE__, "output colorspace: RGB24");
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}
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break;
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case CODEC_YUV: /* compatibility */
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case TC_CODEC_YUV420P:
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handle->out_fmt = TC_CODEC_YUV420P;
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handle->conv_fmt = IMG_YUV420P;
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if (verbose >= TC_DEBUG) {
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tc_log_info(__FILE__, "output colorspace: YUV420P");
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}
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break;
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case CODEC_YUV422: /* compatibility */
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case TC_CODEC_YUV422P:
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handle->out_fmt = TC_CODEC_YUV422P;
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handle->conv_fmt = IMG_YUV422P;
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if (verbose >= TC_DEBUG) {
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tc_log_info(__FILE__, "output colorspace: YUV4222");
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}
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break;
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default:
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tc_log_error(__FILE__, "unknown colorspace requested: 0x%x",
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format);
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ret = -1;
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}
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}
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return ret;
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}
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int tc_x11source_acquire(TCX11Source *handle, uint8_t *data, int maxdata)
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{
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int size = -1;
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if (handle == NULL || data == NULL || maxdata <= 0) {
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tc_log_error(__FILE__, "x11source_acquire: wrong (NULL) parameters");
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return size;
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}
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XLockDisplay(handle->dpy);
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/* OK, let's hack a bit our GraphicContext */
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XSetSubwindowMode(handle->dpy, handle->gc, IncludeInferiors);
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/* don't catch areas of windows covered by children windows */
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XCopyArea(handle->dpy, handle->root, handle->pix, handle->gc,
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0, 0, handle->width, handle->height, 0, 0);
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XSetSubwindowMode(handle->dpy, handle->gc, ClipByChildren);
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/* but draw such areas if windows are opaque */
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size = handle->acquire_image(handle, data, maxdata);
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if (size > 0) {
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handle->acquire_cursor(handle, data, maxdata); /* cannot fail */
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}
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XUnlockDisplay(handle->dpy);
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return size;
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}
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int tc_x11source_close(TCX11Source *handle)
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{
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if (handle != NULL) {
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if (handle->dpy != NULL) {
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int ret = handle->fini(handle);
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if (ret != 0) {
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return ret;
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}
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tcv_free(handle->tcvhandle);
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XFreePixmap(handle->dpy, handle->pix); /* XXX */
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XFreeGC(handle->dpy, handle->gc); /* XXX */
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ret = XCloseDisplay(handle->dpy);
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if (ret == 0) {
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handle->dpy = NULL;
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} else {
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tc_log_error(__FILE__, "XCloseDisplay() failed: %i", ret);
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return -1;
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}
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}
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}
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return 0;
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}
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int tc_x11source_open(TCX11Source *handle, const char *display,
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int mode, uint32_t format)
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{
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XWindowAttributes winfo;
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Status ret;
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int err;
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if (handle == NULL) {
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return 1;
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}
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err = tc_x11source_map_format(handle, format);
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if (err != 0) {
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return err;
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}
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handle->mode = mode;
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handle->dpy = XOpenDisplay(display);
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if (handle->dpy == NULL) {
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tc_log_error(__FILE__, "failed to open display %s",
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(display != NULL) ?display :"default");
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goto open_failed;
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}
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handle->screen = DefaultScreen(handle->dpy);
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handle->root = RootWindow(handle->dpy, handle->screen);
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/* Get the parameters of the root winfow */
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ret = XGetWindowAttributes(handle->dpy, handle->root, &winfo);
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if (!ret) {
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tc_log_error(__FILE__, "failed to get root window attributes");
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goto link_failed;
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}
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handle->width = winfo.width;
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handle->height = winfo.height;
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handle->depth = winfo.depth;
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if (handle->depth != 24) { /* XXX */
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tc_log_error(__FILE__, "Non-truecolor display depth"
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" not supported. Yet.");
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goto link_failed;
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}
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if (verbose >= TC_STATS) {
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tc_log_info(__FILE__, "display properties: %ix%i@%i",
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handle->width, handle->height, handle->depth);
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}
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handle->pix = XCreatePixmap(handle->dpy, handle->root,
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handle->width, handle->height,
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handle->depth); /* XXX */
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if (!handle->pix) {
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tc_log_error(__FILE__, "Can't allocate Pixmap");
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goto pix_failed;
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}
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handle->gc = XCreateGC(handle->dpy, handle->root, 0, 0);
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/* FIXME: what about failures? */
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handle->tcvhandle = tcv_init();
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if (!handle->tcvhandle)
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goto tcv_failed;
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tc_x11source_init_cursor(handle); /* cannot fail */
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#ifdef HAVE_X11_SHM
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if (XShmQueryExtension(handle->dpy) != 0
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&& (mode & TC_X11_MODE_SHM)) {
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if (tc_x11source_init_shm(handle) < 0)
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goto init_failed;
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} else
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#endif /* X11_SHM */
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if (tc_x11source_init_plain(handle) < 0)
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goto init_failed;
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return 0;
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init_failed:
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tcv_free(handle->tcvhandle);
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tcv_failed:
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XFreeGC(handle->dpy, handle->gc);
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XFreePixmap(handle->dpy, handle->pix);
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pix_failed:
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link_failed:
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XCloseDisplay(handle->dpy);
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open_failed:
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return -1;
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}
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#else /* HAVE_X11 */
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int tc_x11source_open(TCX11Source *handle, const char *display,
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int mode, uint32_t format)
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{
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tc_log_error(__FILE__, "X11 support unavalaible");
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return -1;
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}
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int tc_x11source_close(TCX11Source *handle)
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{
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tc_log_error(__FILE__, "X11 support unavalaible");
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return 0;
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}
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int tc_x11source_probe(TCX11Source *handle, ProbeInfo *info)
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{
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tc_log_error(__FILE__, "X11 support unavalaible");
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return -1;
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}
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int tc_x11source_acquire(TCX11Source *handle, uint8_t *data, int maxdata)
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{
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tc_log_error(__FILE__, "X11 support unavalaible");
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return -1;
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}
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int tc_x11source_is_display_name(const char *name)
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{
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return TC_FALSE;
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}
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#endif /* HAVE_X11 */
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/*************************************************************************/
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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