/* GStreamer * * Copyright (C) 2001-2002 Ronald Bultje * 2006 Edgard Lima * * gstv4l2object.h: base class for V4L2 elements * * 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. */ #ifndef __GST_V4L2_OBJECT_H__ #define __GST_V4L2_OBJECT_H__ /* Because of some really cool feature in video4linux1, also known as * 'not including sys/types.h and sys/time.h', we had to include it * ourselves. In all their intelligence, these people decided to fix * this in the next version (video4linux2) in such a cool way that it * breaks all compilations of old stuff... * The real problem is actually that linux/time.h doesn't use proper * macro checks before defining types like struct timeval. The proper * fix here is to either fuck the kernel header (which is what we do * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it * upstream, which I'll consider doing later on. If you get compiler * errors here, check your linux/time.h && sys/time.h header setup. */ #include #include #ifndef __sun #include #define _LINUX_TIME_H #define __user #include #else #include #endif #include #include #include #include #include /* size of v4l2 buffer pool in streaming case */ #define GST_V4L2_MAX_BUFFERS 16 #define GST_V4L2_MIN_BUFFERS 1 /* max frame width/height */ #define GST_V4L2_MAX_SIZE (1<<15) /* 2^15 == 32768 */ G_BEGIN_DECLS #define GST_V4L2_OBJECT(obj) (GstV4l2Object *)(obj) typedef struct _GstV4l2Object GstV4l2Object; typedef struct _GstV4l2ObjectClassHelper GstV4l2ObjectClassHelper; typedef struct _GstV4l2Xv GstV4l2Xv; typedef gboolean (*GstV4l2GetInOutFunction) (GstV4l2Object * v4l2object, gint * input); typedef gboolean (*GstV4l2SetInOutFunction) (GstV4l2Object * v4l2object, gint input); typedef gboolean (*GstV4l2UpdateFpsFunction) (GstV4l2Object * v4l2object); #define GST_V4L2_WIDTH(o) (GST_VIDEO_INFO_WIDTH (&(o)->info)) #define GST_V4L2_HEIGHT(o) (GST_VIDEO_INFO_HEIGHT (&(o)->info)) #define GST_V4L2_PIXELFORMAT(o) ((o)->fmtdesc->pixelformat) #define GST_V4L2_FPS_N(o) (GST_VIDEO_INFO_FPS_N (&(o)->info)) #define GST_V4L2_FPS_D(o) (GST_VIDEO_INFO_FPS_D (&(o)->info)) /* simple check whether the device is open */ #define GST_V4L2_IS_OPEN(o) ((o)->video_fd > 0) /* check whether the device is 'active' */ #define GST_V4L2_IS_ACTIVE(o) ((o)->active) #define GST_V4L2_SET_ACTIVE(o) ((o)->active = TRUE) #define GST_V4L2_SET_INACTIVE(o) ((o)->active = FALSE) struct _GstV4l2Object { GstElement * element; enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */ /* the video device */ char *videodev; /* the video-device's file descriptor */ gint video_fd; GstPoll * poll; gboolean can_poll_device; gboolean active; /* the current format */ struct v4l2_fmtdesc *fmtdesc; GstVideoInfo info; gboolean custom_stride; guint size; GstClockTime duration; /* the video device's capabilities */ struct v4l2_capability vcap; /* the video device's window properties */ struct v4l2_window vwin; /* some more info about the current input's capabilities */ struct v4l2_input vinput; /* lists... */ GSList *formats; /* list of available capture formats */ GList *colors; GList *norms; GList *channels; /* properties */ v4l2_std_id tv_norm; gchar *channel; gulong frequency; /* X-overlay */ GstV4l2Xv *xv; gulong xwindow_id; /* funcs */ GstV4l2GetInOutFunction get_in_out_func; GstV4l2SetInOutFunction set_in_out_func; GstV4l2UpdateFpsFunction update_fps_func; }; struct _GstV4l2ObjectClassHelper { /* probed devices */ GList *devices; }; GType gst_v4l2_object_get_type (void); #define V4L2_STD_OBJECT_PROPS \ PROP_DEVICE, \ PROP_DEVICE_NAME, \ PROP_DEVICE_FD, \ PROP_FLAGS, \ PROP_BRIGHTNESS, \ PROP_CONTRAST, \ PROP_SATURATION, \ PROP_HUE, \ PROP_TV_NORM /* create/destroy */ GstV4l2Object * gst_v4l2_object_new (GstElement * element, enum v4l2_buf_type type, const char *default_device, GstV4l2GetInOutFunction get_in_out_func, GstV4l2SetInOutFunction set_in_out_func, GstV4l2UpdateFpsFunction update_fps_func); void gst_v4l2_object_destroy (GstV4l2Object * v4l2object); /* properties */ void gst_v4l2_object_install_properties_helper (GObjectClass *gobject_class, const char *default_device); gboolean gst_v4l2_object_set_property_helper (GstV4l2Object *v4l2object, guint prop_id, const GValue * value, GParamSpec * pspec); gboolean gst_v4l2_object_get_property_helper (GstV4l2Object *v4l2object, guint prop_id, GValue * value, GParamSpec * pspec); /* starting/stopping */ gboolean gst_v4l2_object_start (GstV4l2Object *v4l2object); gboolean gst_v4l2_object_stop (GstV4l2Object *v4l2object); /* probing */ const GList* gst_v4l2_probe_get_properties (GstPropertyProbe * probe); void gst_v4l2_probe_probe_property (GstPropertyProbe * probe, guint prop_id, const GParamSpec * pspec, GList ** klass_devices); gboolean gst_v4l2_probe_needs_probe (GstPropertyProbe * probe, guint prop_id, const GParamSpec * pspec, GList ** klass_devices); GValueArray* gst_v4l2_probe_get_values (GstPropertyProbe * probe, guint prop_id, const GParamSpec * pspec, GList ** klass_devices); GstCaps* gst_v4l2_object_probe_caps_for_format (GstV4l2Object *v4l2object, guint32 pixelformat, const GstStructure * template); GSList* gst_v4l2_object_get_format_list (GstV4l2Object *v4l2object); GstCaps* gst_v4l2_object_get_all_caps (void); GstStructure* gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc); gboolean gst_v4l2_object_set_format (GstV4l2Object *v4l2object, GstCaps * caps); gboolean gst_v4l2_object_start_streaming (GstV4l2Object *v4l2object); gboolean gst_v4l2_object_stop_streaming (GstV4l2Object *v4l2object); #define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \ \ static void \ interface_as_function ## _probe_probe_property (GstPropertyProbe * probe, \ guint prop_id, \ const GParamSpec * pspec) \ { \ Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \ gst_v4l2_probe_probe_property (probe, prop_id, pspec, \ &this_class->v4l2_class_devices); \ } \ \ static gboolean \ interface_as_function ## _probe_needs_probe (GstPropertyProbe * probe, \ guint prop_id, \ const GParamSpec * pspec) \ { \ Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \ return gst_v4l2_probe_needs_probe (probe, prop_id, pspec, \ &this_class->v4l2_class_devices); \ } \ \ static GValueArray * \ interface_as_function ## _probe_get_values (GstPropertyProbe * probe, \ guint prop_id, \ const GParamSpec * pspec) \ { \ Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \ return gst_v4l2_probe_get_values (probe, prop_id, pspec, \ &this_class->v4l2_class_devices); \ } \ \ static void \ interface_as_function ## _property_probe_interface_init (GstPropertyProbeInterface * iface) \ { \ iface->get_properties = gst_v4l2_probe_get_properties; \ iface->probe_property = interface_as_function ## _probe_probe_property; \ iface->needs_probe = interface_as_function ## _probe_needs_probe; \ iface->get_values = interface_as_function ## _probe_get_values; \ } G_END_DECLS #endif /* __GST_V4L2_OBJECT_H__ */