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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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9c1e52ad11
Original commit message from CVS: This patch: 1) would provide v4l2 plugins, if only the CVS server wouldn't bork on all commits :-(. This patch will come later on in a separate commit when SF fixes her repository. 2) it fixes capsnego for all the video4linux1 plugins 3) it rewrites the debugging of all v4l1 plugins, which now make use of the standard gstreamer debugging features (gst-mask=...). This should make debugging video4linux1/gstreamer problems much easier then it used to be. VS: ----------------------------------------------------------------------
142 lines
5.1 KiB
C
142 lines
5.1 KiB
C
/* G-Streamer generic V4L element - generic V4L calls handling
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __V4L_CALLS_H__
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#define __V4L_CALLS_H__
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#include "gstv4lelement.h"
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* simple check whether the device is open */
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#define GST_V4L_IS_OPEN(v4lelement) \
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(v4lelement->video_fd > 0)
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/* check whether the device is 'active' */
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#define GST_V4L_IS_ACTIVE(v4lelement) \
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(v4lelement->buffer != NULL)
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#define GST_V4L_IS_OVERLAY(v4lelement) \
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(v4lelement->vcap.type & VID_TYPE_OVERLAY)
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/* checks whether the current v4lelement has already been open()'ed or not */
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#define GST_V4L_CHECK_OPEN(v4lelement) \
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if (v4lelement->video_fd <= 0) \
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{ \
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gst_element_error(GST_ELEMENT(v4lelement), \
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"Device is not open"); \
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return FALSE; \
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}
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/* checks whether the current v4lelement is close()'ed or whether it is still open */
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#define GST_V4L_CHECK_NOT_OPEN(v4lelement) \
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if (v4lelement->video_fd != -1) \
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{ \
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gst_element_error(GST_ELEMENT(v4lelement), \
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"Device is open"); \
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return FALSE; \
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}
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/* checks whether the current v4lelement does video overlay */
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#define GST_V4L_CHECK_OVERLAY(v4lelement) \
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if (!(v4lelement->vcap.type & VID_TYPE_OVERLAY)) \
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{ \
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gst_element_error(GST_ELEMENT(v4lelement), \
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"Device doesn't do overlay"); \
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return FALSE; \
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}
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/* checks whether we're in capture mode or not */
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#define GST_V4L_CHECK_ACTIVE(v4lelement) \
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if (v4lelement->buffer == NULL) \
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{ \
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gst_element_error(GST_ELEMENT(v4lelement), \
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"Device is not in streaming mode"); \
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return FALSE; \
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}
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/* checks whether we're out of capture mode or not */
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#define GST_V4L_CHECK_NOT_ACTIVE(v4lelement) \
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if (v4lelement->buffer != NULL) \
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{ \
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gst_element_error(GST_ELEMENT(v4lelement), \
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"Device is in streaming mode"); \
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return FALSE; \
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}
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typedef enum {
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V4L_PICTURE_HUE,
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V4L_PICTURE_BRIGHTNESS,
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V4L_PICTURE_CONTRAST,
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V4L_PICTURE_SATURATION,
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} GstV4lPictureType;
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extern char *picture_name[];
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typedef enum {
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V4L_AUDIO_VOLUME,
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V4L_AUDIO_MUTE,
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V4L_AUDIO_MODE, /* stereo, mono, ... (see videodev.h) */
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} GstV4lAudioType;
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extern char *audio_name[];
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extern char *norm_name[];
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/* open/close the device */
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gboolean gst_v4l_open (GstV4lElement *v4lelement);
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gboolean gst_v4l_close (GstV4lElement *v4lelement);
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/* norm control (norm = VIDEO_MODE_{PAL|NTSC|SECAM|AUTO}) */
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gint gst_v4l_get_num_chans (GstV4lElement *v4lelement);
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gboolean gst_v4l_get_chan_norm (GstV4lElement *v4lelement, gint *channel, gint *norm);
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gboolean gst_v4l_set_chan_norm (GstV4lElement *v4lelement, gint channel, gint norm);
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GList *gst_v4l_get_chan_names (GstV4lElement *v4lelement);
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/* frequency control */
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gboolean gst_v4l_has_tuner (GstV4lElement *v4lelement);
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gboolean gst_v4l_get_frequency (GstV4lElement *v4lelement, gulong *frequency);
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gboolean gst_v4l_set_frequency (GstV4lElement *v4lelement, gulong frequency);
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/* picture control */
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gboolean gst_v4l_get_picture (GstV4lElement *v4lelement, GstV4lPictureType type, gint *value);
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gboolean gst_v4l_set_picture (GstV4lElement *v4lelement, GstV4lPictureType type, gint value);
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/* audio control */
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gboolean gst_v4l_has_audio (GstV4lElement *v4lelement);
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gboolean gst_v4l_get_audio (GstV4lElement *v4lelement, GstV4lAudioType type, gint *value);
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gboolean gst_v4l_set_audio (GstV4lElement *v4lelement, GstV4lAudioType type, gint value);
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/* overlay */
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gboolean gst_v4l_set_overlay (GstV4lElement *v4lelement, gchar *display);
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gboolean gst_v4l_set_window (GstV4lElement *v4lelement, gint x, gint y, gint w, gint h);
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gboolean gst_v4l_set_clips (GstV4lElement *v4lelement, struct video_clip *clips, gint num_clips);
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gboolean gst_v4l_enable_overlay (GstV4lElement *v4lelement, gboolean enable);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __V4L_CALLS_H__ */
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