/* GStreamer * * Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net> * 2006 Edgard Lima <edgard.lima@indt.org.br> * * v4l2_calls.h - generic V4L2 calls handling * * 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 __V4L2_CALLS_H__ #define __V4L2_CALLS_H__ #include "gstv4l2object.h" #ifdef HAVE_LIBV4L2 # include <libv4l2.h> #else # include <sys/ioctl.h> # include <linux/videodev.h> # include <linux/videodev2.h> # define v4l2_fd_open(fd, flags) (fd) # define v4l2_close close # define v4l2_dup dup # define v4l2_ioctl ioctl # define v4l2_read read # define v4l2_mmap mmap # define v4l2_munmap munmap #endif /* simple check whether the device is open */ #define GST_V4L2_IS_OPEN(v4l2object) \ (v4l2object->video_fd > 0) /* check whether the device is 'active' */ #define GST_V4L2_IS_ACTIVE(v4l2object) \ (v4l2object->buffer != NULL) #define GST_V4L2_IS_OVERLAY(v4l2object) \ (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OVERLAY) /* checks whether the current v4lv4l2object has already been open()'ed or not */ #define GST_V4L2_CHECK_OPEN(v4l2object) \ if (!GST_V4L2_IS_OPEN(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (_("Device is not open.")), (NULL)); \ return FALSE; \ } /* checks whether the current v4lv4l2object is close()'ed or whether it is still open */ #define GST_V4L2_CHECK_NOT_OPEN(v4l2object) \ if (GST_V4L2_IS_OPEN(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (_("Device is open.")), (NULL)); \ return FALSE; \ } /* checks whether the current v4lv4l2object does video overlay */ #define GST_V4L2_CHECK_OVERLAY(v4l2object) \ if (!GST_V4L2_IS_OVERLAY(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (NULL), ("Device cannot handle overlay")); \ return FALSE; \ } /* checks whether we're in capture mode or not */ #define GST_V4L2_CHECK_ACTIVE(v4l2object) \ if (!GST_V4L2_IS_ACTIVE(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (NULL), ("Device is not in streaming mode")); \ return FALSE; \ } /* checks whether we're out of capture mode or not */ #define GST_V4L2_CHECK_NOT_ACTIVE(v4l2object) \ if (GST_V4L2_IS_ACTIVE(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (NULL), ("Device is in streaming mode")); \ return FALSE; \ } /* open/close the device */ gboolean gst_v4l2_open (GstV4l2Object *v4l2object); gboolean gst_v4l2_close (GstV4l2Object *v4l2object); /* norm/input/output */ gboolean gst_v4l2_get_norm (GstV4l2Object *v4l2object, v4l2_std_id *norm); gboolean gst_v4l2_set_norm (GstV4l2Object *v4l2object, v4l2_std_id norm); gboolean gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input); gboolean gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input); #if 0 /* output not handled by now */ gboolean gst_v4l2_get_output (GstV4l2Object *v4l2object, gint *output); gboolean gst_v4l2_set_output (GstV4l2Object *v4l2object, gint output); #endif /* #if 0 - output not handled by now */ /* frequency control */ gboolean gst_v4l2_get_frequency (GstV4l2Object *v4l2object, gint tunernum, gulong *frequency); gboolean gst_v4l2_set_frequency (GstV4l2Object *v4l2object, gint tunernum, gulong frequency); gboolean gst_v4l2_signal_strength (GstV4l2Object *v4l2object, gint tunernum, gulong *signal); /* attribute control */ gboolean gst_v4l2_get_attribute (GstV4l2Object *v4l2object, int attribute, int *value); gboolean gst_v4l2_set_attribute (GstV4l2Object *v4l2object, int attribute, const int value); gboolean gst_v4l2_get_capabilities (GstV4l2Object * v4l2object); #define LOG_CAPS(obj, caps) GST_DEBUG_OBJECT (obj, "%s: %" GST_PTR_FORMAT, #caps, caps) #endif /* __V4L2_CALLS_H__ */