Introducing the "video" plug-in (not functional yet)

Makefile

@@ -105,6 +105,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/plugins/systray.c \
 		$(PACKAGE)-$(VERSION)/src/plugins/template.c \
 		$(PACKAGE)-$(VERSION)/src/plugins/ussd.c \
+		$(PACKAGE)-$(VERSION)/src/plugins/video.c \
 		$(PACKAGE)-$(VERSION)/src/plugins/Makefile \
 		$(PACKAGE)-$(VERSION)/src/plugins/project.conf \
 		$(PACKAGE)-$(VERSION)/src/plugins/16x16/Makefile \

src/plugins/Makefile

@@ -1,5 +1,5 @@
 SUBDIRS	= 16x16 24x24 32x32 48x48
-TARGETS	= blacklist.so debug.so engineering.so gprs.so gps.so locker.so n900.so openmoko.so oss.so panel.so profiles.so smscrypt.so systray.so template.so ussd.so
+TARGETS	= blacklist.so debug.so engineering.so gprs.so gps.so locker.so n900.so openmoko.so oss.so panel.so profiles.so smscrypt.so systray.so template.so ussd.so video.so
 PREFIX	= /usr/local
 DESTDIR	=
 LIBDIR	= $(PREFIX)/lib
@@ -127,6 +127,13 @@ ussd_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
 ussd.so: $(ussd_OBJS)
 	$(CCSHARED) -o ussd.so $(ussd_OBJS) $(ussd_LDFLAGS)
 
+video_OBJS = video.o
+video_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
+video_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
+
+video.so: $(video_OBJS)
+	$(CCSHARED) -o video.so $(video_OBJS) $(video_LDFLAGS)
+
 blacklist.o: blacklist.c ../../include/Phone.h
 	$(CC) $(blacklist_CFLAGS) -c blacklist.c
 
@@ -172,13 +179,16 @@ template.o: template.c ../../include/Phone.h
 ussd.o: ussd.c ../../include/Phone.h
 	$(CC) $(ussd_CFLAGS) -c ussd.c
 
+video.o: video.c ../../include/Phone.h
+	$(CC) $(video_CFLAGS) -c video.c
+
 clean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) || exit; done
-	$(RM) -- $(blacklist_OBJS) $(debug_OBJS) $(engineering_OBJS) $(gprs_OBJS) $(gps_OBJS) $(locker_OBJS) $(n900_OBJS) $(openmoko_OBJS) $(oss_OBJS) $(panel_OBJS) $(profiles_OBJS) $(smscrypt_OBJS) $(systray_OBJS) $(template_OBJS) $(ussd_OBJS)
+	$(RM) -- $(blacklist_OBJS) $(debug_OBJS) $(engineering_OBJS) $(gprs_OBJS) $(gps_OBJS) $(locker_OBJS) $(n900_OBJS) $(openmoko_OBJS) $(oss_OBJS) $(panel_OBJS) $(profiles_OBJS) $(smscrypt_OBJS) $(systray_OBJS) $(template_OBJS) $(ussd_OBJS) $(video_OBJS)
 
 distclean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean) || exit; done
-	$(RM) -- $(blacklist_OBJS) $(debug_OBJS) $(engineering_OBJS) $(gprs_OBJS) $(gps_OBJS) $(locker_OBJS) $(n900_OBJS) $(openmoko_OBJS) $(oss_OBJS) $(panel_OBJS) $(profiles_OBJS) $(smscrypt_OBJS) $(systray_OBJS) $(template_OBJS) $(ussd_OBJS)
+	$(RM) -- $(blacklist_OBJS) $(debug_OBJS) $(engineering_OBJS) $(gprs_OBJS) $(gps_OBJS) $(locker_OBJS) $(n900_OBJS) $(openmoko_OBJS) $(oss_OBJS) $(panel_OBJS) $(profiles_OBJS) $(smscrypt_OBJS) $(systray_OBJS) $(template_OBJS) $(ussd_OBJS) $(video_OBJS)
 	$(RM) -- $(TARGETS)
 
 install: $(TARGETS)

src/plugins/project.conf

@@ -1,5 +1,5 @@
 subdirs=16x16,24x24,32x32,48x48
-targets=blacklist,debug,engineering,gprs,gps,locker,n900,openmoko,oss,panel,profiles,smscrypt,systray,template,ussd
+targets=blacklist,debug,engineering,gprs,gps,locker,n900,openmoko,oss,panel,profiles,smscrypt,systray,template,ussd,video
 cppflags_force=-I ../../include
 cppflags=
 cflags_force=-W `pkg-config --cflags libSystem gtk+-2.0`
@@ -133,3 +133,10 @@ install=$(LIBDIR)/Phone/plugins
 
 [ussd.c]
 depends=../../include/Phone.h
+
+[video]
+type=plugin
+sources=video.c
+
+[video.c]
+depends=../../include/Phone.h

src/plugins/video.c

@@ -0,0 +1,206 @@
+/* $Id$ */
+/* Copyright (c) 2012 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Desktop Phone */
+/* 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, version 3 of the License.
+ *
+ * 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, see <http://www.gnu.org/licenses/>. */
+/* TODO:
+ * - attempt to open the video device at regular intervals
+ * - display a window even if it was impossible to open a capture device */
+
+
+
+#include <sys/ioctl.h>
+#ifdef __NetBSD__
+# include <sys/videoio.h>
+#else
+# include <linux/videodev2.h>
+#endif
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <System.h>
+#include <Desktop.h>
+#include "Phone.h"
+
+
+/* Video */
+/* private */
+/* types */
+typedef struct _PhonePlugin
+{
+	PhonePluginHelper * helper;
+
+	int fd;
+	guint source;
+	Buffer * buffer;
+
+	/* widgets */
+	GtkWidget * window;
+	GtkWidget * area;
+} VideoPhonePlugin;
+
+
+/* prototypes */
+/* plug-in */
+static VideoPhonePlugin * _video_init(PhonePluginHelper * helper);
+static void _video_destroy(VideoPhonePlugin * video);
+
+/* useful */
+static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
+		void * data);
+
+/* callbacks */
+static gboolean _video_on_closex(gpointer data);
+static gboolean _video_on_refresh(gpointer data);
+
+
+/* public */
+/* variables */
+PhonePluginDefinition plugin =
+{
+	"Video",
+	"camera-video",
+	NULL,
+	_video_init,
+	_video_destroy,
+	NULL,
+	NULL
+};
+
+
+/* private */
+/* functions */
+/* video_init */
+static VideoPhonePlugin * _video_init(PhonePluginHelper * helper)
+{
+	VideoPhonePlugin * video;
+	struct v4l2_capability cap;
+	struct v4l2_cropcap cropcap;
+	struct v4l2_crop crop;
+	struct v4l2_format format;
+
+	if((video = object_new(sizeof(*video))) == NULL)
+		return NULL;
+	video->helper = helper;
+	/* FIXME let this be configurable */
+	video->fd = open("/dev/video0", O_RDWR);
+	video->buffer = buffer_new(0, NULL);
+	video->source = 0;
+	video->window = NULL;
+	/* check for errors */
+	if(video->buffer == NULL
+			|| video->fd < 0
+			|| _video_ioctl(video, VIDIOC_QUERYCAP, &cap) == -1
+			|| (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0
+			/* FIXME also implement mmap() and streaming */
+			|| (cap.capabilities & V4L2_CAP_READWRITE) == 0)
+	{
+		_video_destroy(video);
+		return NULL;
+	}
+	/* reset cropping */
+	memset(&cropcap, 0, sizeof(cropcap));
+	cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	if(_video_ioctl(video, VIDIOC_CROPCAP, &cropcap) == 0)
+	{
+		/* reset to default */
+		crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		crop.c = cropcap.defrect;
+		if(_video_ioctl(video, VIDIOC_S_CROP, &crop) == -1
+				&& errno == EINVAL)
+			helper->error(helper->phone, "Cropping not supported",
+					0);
+	}
+	/* obtain the current format */
+	if(_video_ioctl(video, VIDIOC_G_FMT, &format) == -1
+			|| buffer_set_size(video->buffer,
+				format.fmt.pix.sizeimage) != 0)
+	{
+		_video_destroy(video);
+		return NULL;
+	}
+	/* create the window */
+	video->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	gtk_window_set_default_size(GTK_WINDOW(video->window),
+			format.fmt.pix.width, format.fmt.pix.height);
+	gtk_window_set_resizable(GTK_WINDOW(video->window), FALSE);
+	g_signal_connect_swapped(video->window, "delete-event", G_CALLBACK(
+				_video_on_closex), video);
+	video->area = gtk_drawing_area_new();
+	gtk_container_add(GTK_CONTAINER(video->window), video->area);
+	video->source = g_timeout_add(1000, _video_on_refresh, video);
+	return video;
+}
+
+
+/* video_destroy */
+static void _video_destroy(VideoPhonePlugin * video)
+{
+	if(video->window != NULL)
+		gtk_widget_destroy(video->window);
+	if(video->source != 0)
+		g_source_remove(video->source);
+	if(video->fd >= 0)
+		close(video->fd);
+	buffer_delete(video->buffer);
+	object_delete(video);
+}
+
+
+/* useful */
+/* video_ioctl */
+static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
+		void * data)
+{
+	int ret;
+
+	for(;;)
+		if((ret = ioctl(video->fd, request, data)) != -1
+				|| errno != EINTR)
+			break;
+	return ret;
+}
+
+
+/* callbacks */
+/* video_on_closex */
+static gboolean _video_on_closex(gpointer data)
+{
+	VideoPhonePlugin * video = data;
+
+	gtk_widget_hide(video->window);
+	if(video->source != 0)
+		g_source_remove(video->source);
+	video->source = 0;
+	return TRUE;
+}
+
+
+/* video_on_refresh */
+static gboolean _video_on_refresh(gpointer data)
+{
+	VideoPhonePlugin * video = data;
+
+	/* FIXME no longer block on read() */
+	if(read(video->fd, buffer_get_data(video->buffer),
+				buffer_get_size(video->buffer)) <= 0)
+	{
+		/* this error can be ignored */
+		if(errno == EAGAIN)
+			return TRUE;
+		close(video->fd);
+		video->fd = -1;
+		return FALSE;
+	}
+	return TRUE;
+}