mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 17:50:36 +00:00
5264e71774
Original commit message from CVS: I'm such an idiot - these files should have been in a week ago
143 lines
5.2 KiB
C
143 lines
5.2 KiB
C
/* G-Streamer generic V4L element - generic V4L calls handling
|
|
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
|
|
*
|
|
* 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 __V4L_CALLS_H__
|
|
#define __V4L_CALLS_H__
|
|
|
|
#include "gstv4lelement.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
/* simple check whether the device is open */
|
|
#define GST_V4L_IS_OPEN(v4lelement) \
|
|
(v4lelement->video_fd > 0)
|
|
|
|
/* check whether the device is 'active' */
|
|
#define GST_V4L_IS_ACTIVE(v4lelement) \
|
|
(v4lelement->buffer != NULL)
|
|
|
|
#define GST_V4L_IS_OVERLAY(v4lelement) \
|
|
(v4lelement->vcap.type & VID_TYPE_OVERLAY)
|
|
|
|
/* checks whether the current v4lelement has already been open()'ed or not */
|
|
#define GST_V4L_CHECK_OPEN(v4lelement) \
|
|
if (v4lelement->video_fd <= 0) \
|
|
{ \
|
|
gst_element_error(GST_ELEMENT(v4lelement), \
|
|
"Device is not open"); \
|
|
return FALSE; \
|
|
}
|
|
|
|
/* checks whether the current v4lelement is close()'ed or whether it is still open */
|
|
#define GST_V4L_CHECK_NOT_OPEN(v4lelement) \
|
|
if (v4lelement->video_fd != -1) \
|
|
{ \
|
|
gst_element_error(GST_ELEMENT(v4lelement), \
|
|
"Device is open"); \
|
|
return FALSE; \
|
|
}
|
|
|
|
/* checks whether the current v4lelement does video overlay */
|
|
#define GST_V4L_CHECK_OVERLAY(v4lelement) \
|
|
if (!(v4lelement->vcap.type & VID_TYPE_OVERLAY)) \
|
|
{ \
|
|
gst_element_error(GST_ELEMENT(v4lelement), \
|
|
"Device doesn't do overlay"); \
|
|
return FALSE; \
|
|
}
|
|
|
|
/* checks whether we're in capture mode or not */
|
|
#define GST_V4L_CHECK_ACTIVE(v4lelement) \
|
|
if (v4lelement->buffer == NULL) \
|
|
{ \
|
|
gst_element_error(GST_ELEMENT(v4lelement), \
|
|
"Device is not in streaming mode"); \
|
|
return FALSE; \
|
|
}
|
|
|
|
/* checks whether we're out of capture mode or not */
|
|
#define GST_V4L_CHECK_NOT_ACTIVE(v4lelement) \
|
|
if (v4lelement->buffer != NULL) \
|
|
{ \
|
|
gst_element_error(GST_ELEMENT(v4lelement), \
|
|
"Device is in streaming mode"); \
|
|
return FALSE; \
|
|
}
|
|
|
|
|
|
typedef enum {
|
|
V4L_PICTURE_HUE,
|
|
V4L_PICTURE_BRIGHTNESS,
|
|
V4L_PICTURE_CONTRAST,
|
|
V4L_PICTURE_SATURATION,
|
|
} GstV4lPictureType;
|
|
|
|
extern char *picture_name[];
|
|
|
|
typedef enum {
|
|
V4L_AUDIO_VOLUME,
|
|
V4L_AUDIO_MUTE,
|
|
V4L_AUDIO_MODE, /* stereo, mono, ... (see videodev.h) */
|
|
} GstV4lAudioType;
|
|
|
|
extern char *audio_name[];
|
|
|
|
extern char *norm_name[];
|
|
|
|
|
|
/* open/close the device */
|
|
gboolean gst_v4l_open (GstV4lElement *v4lelement);
|
|
gboolean gst_v4l_close (GstV4lElement *v4lelement);
|
|
|
|
/* norm control (norm = VIDEO_MODE_{PAL|NTSC|SECAM|AUTO}) */
|
|
gint gst_v4l_get_num_chans (GstV4lElement *v4lelement);
|
|
gboolean gst_v4l_get_chan_norm (GstV4lElement *v4lelement, gint *channel, gint *norm);
|
|
gboolean gst_v4l_set_chan_norm (GstV4lElement *v4lelement, gint channel, gint norm);
|
|
GList *gst_v4l_get_chan_names (GstV4lElement *v4lelement);
|
|
|
|
/* frequency control */
|
|
gboolean gst_v4l_has_tuner (GstV4lElement *v4lelement);
|
|
gboolean gst_v4l_get_frequency (GstV4lElement *v4lelement, gulong *frequency);
|
|
gboolean gst_v4l_set_frequency (GstV4lElement *v4lelement, gulong frequency);
|
|
|
|
/* picture control */
|
|
gboolean gst_v4l_get_picture (GstV4lElement *v4lelement, GstV4lPictureType type, gint *value);
|
|
gboolean gst_v4l_set_picture (GstV4lElement *v4lelement, GstV4lPictureType type, gint value);
|
|
|
|
/* audio control */
|
|
gboolean gst_v4l_has_audio (GstV4lElement *v4lelement);
|
|
gboolean gst_v4l_get_audio (GstV4lElement *v4lelement, GstV4lAudioType type, gint *value);
|
|
gboolean gst_v4l_set_audio (GstV4lElement *v4lelement, GstV4lAudioType type, gint value);
|
|
|
|
/* overlay */
|
|
gboolean gst_v4l_set_overlay (GstV4lElement *v4lelement, gchar *display);
|
|
gboolean gst_v4l_set_window (GstV4lElement *v4lelement, gint x, gint y,
|
|
gint w, gint h,
|
|
struct video_clip *clips, gint num_clips);
|
|
gboolean gst_v4l_enable_overlay (GstV4lElement *v4lelement, gboolean enable);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* __V4L_CALLS_H__ */
|