| /* 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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __V4L2_CALLS_H__ |
| #define __V4L2_CALLS_H__ |
| |
| #include "gstv4l2object.h" |
| |
| #ifdef HAVE_LIBV4L2 |
| # include <libv4l2.h> |
| #else |
| # include "ext/videodev2.h" |
| # include <sys/ioctl.h> |
| # include <sys/mman.h> |
| # include <unistd.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 |
| |
| #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_dup (GstV4l2Object *v4l2object, GstV4l2Object *other); |
| 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); |
| gboolean gst_v4l2_get_output (GstV4l2Object *v4l2object, |
| gint *output); |
| gboolean gst_v4l2_set_output (GstV4l2Object *v4l2object, |
| gint output); |
| |
| /* 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_set_controls (GstV4l2Object * v4l2object, |
| GstStructure * controls); |
| |
| 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__ */ |