gstreamer/sys/v4l2/v4l2_calls.h
Bastien Nocera a50de826a2 Optionally use libv4l to access v4l2 devices. Fixes bug #545033.
Original commit message from CVS:
Patch by: Bastien Nocera <hadess at hadess dot net>,
Hans de Goede <jwrdegoede at fedoraproject dot org>
* configure.ac:
* sys/v4l2/Makefile.am:
* sys/v4l2/gstv4l2src.c: (gst_v4l2src_get_read):
* sys/v4l2/v4l2_calls.c: (gst_v4l2_get_capabilities),
(gst_v4l2_fill_lists), (gst_v4l2_open), (gst_v4l2_close),
(gst_v4l2_get_norm), (gst_v4l2_set_norm), (gst_v4l2_get_frequency),
(gst_v4l2_set_frequency), (gst_v4l2_signal_strength),
(gst_v4l2_get_attribute), (gst_v4l2_set_attribute),
(gst_v4l2_get_input), (gst_v4l2_set_input):
* sys/v4l2/v4l2_calls.h:
* sys/v4l2/v4l2src_calls.c: (gst_v4l2_buffer_finalize),
(gst_v4l2_buffer_new), (gst_v4l2_buffer_pool_finalize),
(gst_v4l2_buffer_pool_new), (gst_v4l2_buffer_pool_activate),
(gst_v4l2src_fill_format_list),
(gst_v4l2src_probe_caps_for_format_and_size),
(gst_v4l2src_probe_caps_for_format), (gst_v4l2src_grab_frame),
(gst_v4l2src_set_capture), (gst_v4l2src_capture_init),
(gst_v4l2src_capture_start), (gst_v4l2src_capture_stop),
(gst_v4l2src_get_nearest_size):
Optionally use libv4l to access v4l2 devices. Fixes bug #545033.
2008-11-04 12:32:48 +00:00

140 lines
4.8 KiB
C

/* 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"
#include "gst/gst-i18n-plugin.h"
#ifdef HAVE_LIBV4L2
#include <libv4l2.h>
#else
#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);
#endif /* __V4L2_CALLS_H__ */