diff options
author | Ronald S. Bultje <rbultje@ronald.bitfreak.net> | 2002-02-23 14:11:43 +0000 |
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committer | Ronald S. Bultje <rbultje@ronald.bitfreak.net> | 2002-02-23 14:11:43 +0000 |
commit | ab745861452003f67e45b423b513d50f27a0f28e (patch) | |
tree | e7d82b4b51ff5611e3da2cae344a46c7a541cf54 | |
parent | 162086096d150bbda472e89eda8df38f5de2b3c3 (diff) |
Actually forgot to add the overlay file itself
Original commit message from CVS:
Actually forgot to add the overlay file itself
-rw-r--r-- | sys/v4l/v4l-overlay_calls.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/sys/v4l/v4l-overlay_calls.c b/sys/v4l/v4l-overlay_calls.c new file mode 100644 index 000000000..12d06a32a --- /dev/null +++ b/sys/v4l/v4l-overlay_calls.c @@ -0,0 +1,186 @@ +/* G-Streamer generic V4L element - generic V4L overlay handling + * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library 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. + */ + +//#define DEBUG + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <string.h> +#include <errno.h> +#include "v4l_calls.h" + + +/****************************************************** + * gst_v4l_set_overlay(): + * calls v4l-conf + * return value: TRUE on success, FALSE on error + ******************************************************/ + +gboolean +gst_v4l_set_overlay (GstV4lElement *v4lelement, + gchar *display) +{ + gchar *buff; + +#ifdef DEBUG + fprintf(stderr, "V4L: gst_v4l_set_overlay(), display = \'%s\'\n", display); +#endif + + GST_V4L_CHECK_NOT_OPEN(v4lelement); + + /* start v4l-conf */ + buff = g_strdup_printf("v4l-conf -q -c %s -d %s", + v4lelement->videodev?v4lelement->videodev:"/dev/video", display); + + switch (system(buff)) + { + case -1: + gst_element_error(GST_ELEMENT(v4lelement), + "Could not start v4l-conf: %s", sys_errlist[errno]); + g_free(buff); + return FALSE; + case 0: + break; + default: + gst_element_error(GST_ELEMENT(v4lelement), + "v4l-conf failed to run correctly: %s", sys_errlist[errno]); + g_free(buff); + return FALSE; + } + + g_free(buff); + return TRUE; +} + + +/****************************************************** + * gst_v4l_set_vwin(): + * does the VIDIOCSVWIN ioctl() + * return value: TRUE on success, FALSE on error + ******************************************************/ + +static gboolean +gst_v4l_set_vwin (GstV4lElement *v4lelement) +{ + if (ioctl(v4lelement->video_fd, VIDIOCSWIN, &(v4lelement->vwin)) < 0) + { + gst_element_error(GST_ELEMENT(v4lelement), + "Failed to set the video window: %s", + sys_errlist[errno]); + return FALSE; + } + return TRUE; +} + + +/****************************************************** + * gst_v4l_set_window(): + * sets the window where to display the video overlay + * return value: TRUE on success, FALSE on error + ******************************************************/ + +gboolean +gst_v4l_set_window (GstV4lElement *v4lelement, + gint x, gint y, + gint w, gint h) +{ +#ifdef DEBUG + fprintf(stderr, "V4L: gst_v4l_set_window(), position (x,y/wxh) = %d,%d/%dx%d\n", + x, y, w, h); +#endif + + GST_V4L_CHECK_OVERLAY(v4lelement); + + v4lelement->vwin.clipcount = 0; + v4lelement->vwin.x = x; + v4lelement->vwin.y = y; + v4lelement->vwin.width = w; + v4lelement->vwin.height = h; + v4lelement->vwin.flags = 0; + + return gst_v4l_set_vwin(v4lelement); +} + + +/****************************************************** + * gst_v4l_set_clips(): + * sets video overlay clips + * return value: TRUE on success, FALSE on error + ******************************************************/ + +gboolean +gst_v4l_set_clips (GstV4lElement *v4lelement, + struct video_clip *clips, + gint num_clips) +{ +#ifdef DEBUG + fprintf(stderr, "V4L: gst_v4l_set_clips()\n"); +#endif + + GST_V4L_CHECK_OPEN(v4lelement); + GST_V4L_CHECK_OVERLAY(v4lelement); + + if (!(v4lelement->vcap.type & VID_TYPE_CLIPPING)) + { + gst_element_error(GST_ELEMENT(v4lelement), + "Device \'%s\' doesn't do clipping", + v4lelement->videodev?v4lelement->videodev:"/dev/video"); + return FALSE; + } + + v4lelement->vwin.clips = clips; + v4lelement->vwin.clipcount = num_clips; + + return gst_v4l_set_vwin(v4lelement); +} + + +/****************************************************** + * gst_v4l_set_overlay(): + * enables/disables actual video overlay display + * return value: TRUE on success, FALSE on error + ******************************************************/ + +gboolean +gst_v4l_enable_overlay (GstV4lElement *v4lelement, + gboolean enable) +{ + gint doit = enable?1:0; + +#ifdef DEBUG + fprintf(stderr, "V4L: gst_v4l_enable_overlay(), enable = %s\n", + enable?"true":"false"); +#endif + + GST_V4L_CHECK_OPEN(v4lelement); + GST_V4L_CHECK_OVERLAY(v4lelement); + + if (ioctl(v4lelement->video_fd, VIDIOCCAPTURE, &doit) < 0) + { + gst_element_error(GST_ELEMENT(v4lelement), + "Failed to %s overlay display: %s", + enable?"enable":"disable", sys_errlist[errno]); + return FALSE; + } + + return TRUE; +} |