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085f87d85f
The v4l2 driver for USB webcams on OpenSolaris does not support select() calls. Detect when select() fails, and skip polling the device afterward, which restores the pre 0.10.14 behaviour on OpenSolaris. Signed-off-by: Jan Schmidt <thaytan@noraisin.net>
198 lines
8.7 KiB
C
198 lines
8.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@indt.org.br>
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*
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* gstv4l2object.h: base class for V4L2 elements
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_V4L2_OBJECT_H__
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#define __GST_V4L2_OBJECT_H__
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/* Because of some really cool feature in video4linux1, also known as
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* 'not including sys/types.h and sys/time.h', we had to include it
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* ourselves. In all their intelligence, these people decided to fix
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* this in the next version (video4linux2) in such a cool way that it
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* breaks all compilations of old stuff...
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* The real problem is actually that linux/time.h doesn't use proper
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* macro checks before defining types like struct timeval. The proper
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* fix here is to either fuck the kernel header (which is what we do
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* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
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* upstream, which I'll consider doing later on. If you get compiler
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* errors here, check your linux/time.h && sys/time.h header setup.
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*/
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#include <sys/types.h>
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#ifndef __sun
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#include <linux/types.h>
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#define _LINUX_TIME_H
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#define __user
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#include <linux/videodev2.h>
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#else
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#include <sys/videodev2.h>
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstpushsrc.h>
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#include <gst/interfaces/propertyprobe.h>
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G_BEGIN_DECLS
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#define GST_V4L2_OBJECT(obj) (GstV4l2Object *)(obj)
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typedef struct _GstV4l2Object GstV4l2Object;
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typedef struct _GstV4l2ObjectClassHelper GstV4l2ObjectClassHelper;
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typedef struct _GstV4l2Xv GstV4l2Xv;
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typedef gboolean (*GstV4l2GetInOutFunction) (GstV4l2Object * v4l2object, gint * input);
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typedef gboolean (*GstV4l2SetInOutFunction) (GstV4l2Object * v4l2object, gint input);
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typedef gboolean (*GstV4l2UpdateFpsFunction) (GstV4l2Object * v4l2object);
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struct _GstV4l2Object {
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GstElement * element;
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/* the video device */
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char *videodev;
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/* the video-device's file descriptor */
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gint video_fd;
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GstPoll * poll;
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gboolean can_poll_device;
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/* the video buffer (mmap()'ed) */
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guint8 **buffer;
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/* the video device's capabilities */
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struct v4l2_capability vcap;
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/* the video device's window properties */
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struct v4l2_window vwin;
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/* some more info about the current input's capabilities */
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struct v4l2_input vinput;
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/* lists... */
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GList *colors;
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GList *norms;
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GList *channels;
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/* properties */
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gchar *norm;
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gchar *channel;
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gulong frequency;
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/* X-overlay */
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GstV4l2Xv *xv;
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gulong xwindow_id;
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/* funcs */
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GstV4l2GetInOutFunction get_in_out_func;
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GstV4l2SetInOutFunction set_in_out_func;
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GstV4l2UpdateFpsFunction update_fps_func;
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};
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struct _GstV4l2ObjectClassHelper {
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/* probed devices */
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GList *devices;
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};
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GType gst_v4l2_object_get_type (void);
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#define V4L2_STD_OBJECT_PROPS \
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PROP_DEVICE, \
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PROP_DEVICE_NAME, \
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PROP_DEVICE_FD, \
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PROP_FLAGS
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/* create/destroy */
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GstV4l2Object * gst_v4l2_object_new (GstElement * element,
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GstV4l2GetInOutFunction get_in_out_func,
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GstV4l2SetInOutFunction set_in_out_func,
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GstV4l2UpdateFpsFunction update_fps_func);
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void gst_v4l2_object_destroy (GstV4l2Object * v4l2object);
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/* properties */
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void gst_v4l2_object_install_properties_helper (GObjectClass *gobject_class);
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gboolean gst_v4l2_object_set_property_helper (GstV4l2Object *v4l2object,
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guint prop_id, const GValue * value,
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GParamSpec * pspec);
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gboolean gst_v4l2_object_get_property_helper (GstV4l2Object *v4l2object,
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guint prop_id, GValue * value,
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GParamSpec * pspec);
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/* starting/stopping */
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gboolean gst_v4l2_object_start (GstV4l2Object *v4l2object);
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gboolean gst_v4l2_object_stop (GstV4l2Object *v4l2object);
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/* probing */
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const GList* gst_v4l2_probe_get_properties (GstPropertyProbe * probe);
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void gst_v4l2_probe_probe_property (GstPropertyProbe * probe, guint prop_id,
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const GParamSpec * pspec,
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GList ** klass_devices);
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gboolean gst_v4l2_probe_needs_probe (GstPropertyProbe * probe, guint prop_id,
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const GParamSpec * pspec,
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GList ** klass_devices);
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GValueArray* gst_v4l2_probe_get_values (GstPropertyProbe * probe, guint prop_id,
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const GParamSpec * pspec,
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GList ** klass_devices);
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#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
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\
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static void \
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interface_as_function ## _probe_probe_property (GstPropertyProbe * probe, \
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guint prop_id, \
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const GParamSpec * pspec) \
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{ \
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Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
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gst_v4l2_probe_probe_property (probe, prop_id, pspec, \
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&this_class->v4l2_class_devices); \
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} \
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\
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static gboolean \
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interface_as_function ## _probe_needs_probe (GstPropertyProbe * probe, \
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guint prop_id, \
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const GParamSpec * pspec) \
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{ \
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Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
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return gst_v4l2_probe_needs_probe (probe, prop_id, pspec, \
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&this_class->v4l2_class_devices); \
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} \
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\
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static GValueArray * \
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interface_as_function ## _probe_get_values (GstPropertyProbe * probe, \
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guint prop_id, \
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const GParamSpec * pspec) \
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{ \
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Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
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return gst_v4l2_probe_get_values (probe, prop_id, pspec, \
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&this_class->v4l2_class_devices); \
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} \
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\
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static void \
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interface_as_function ## _property_probe_interface_init (GstPropertyProbeInterface * iface) \
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{ \
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iface->get_properties = gst_v4l2_probe_get_properties; \
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iface->probe_property = interface_as_function ## _probe_probe_property; \
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iface->needs_probe = interface_as_function ## _probe_needs_probe; \
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iface->get_values = interface_as_function ## _probe_get_values; \
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}
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G_END_DECLS
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#endif /* __GST_V4L2_OBJECT_H__ */
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