diff -r 000000000000 -r 0e761a78d257 gst_plugins_base/sys/v4l/v4l_calls.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/sys/v4l/v4l_calls.h	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,154 @@
+/* GStreamer
+ *
+ * v4l_calls.h: header for generic V4L calls
+ *
+ * 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"
+#include "gst/gst-i18n-plugin.h"
+
+
+G_BEGIN_DECLS
+
+
+/* simple check whether the device is open */
+#define GST_V4L_IS_OPEN(element) \
+  (GST_V4LELEMENT (element)->video_fd > 0)
+
+/* check whether the device is 'active' */
+#define GST_V4L_IS_ACTIVE(element) \
+  (GST_V4LELEMENT (element)->buffer != NULL)
+
+#define GST_V4L_IS_OVERLAY(element) \
+  (GST_V4LELEMENT (element)->vcap.type & VID_TYPE_OVERLAY)
+
+/* checks whether the current v4lelement has already been open()'ed or not */
+#define GST_V4L_CHECK_OPEN(element)                             \
+  if (!GST_V4L_IS_OPEN (element))                               \
+  {                                                             \
+    GST_ELEMENT_ERROR (element, RESOURCE, TOO_LAZY,             \
+      (_("Device is not open.")), (NULL));                      \
+    return FALSE;                                               \
+  }
+
+/* checks whether the current v4lelement is close()'ed or whether it is still open */
+#define GST_V4L_CHECK_NOT_OPEN(element)                         \
+  if (GST_V4L_IS_OPEN (element))                                \
+  {                                                             \
+    GST_ELEMENT_ERROR (element, RESOURCE, TOO_LAZY,             \
+      (_("Device is open.")), (NULL));                          \
+    return FALSE;                                               \
+  }
+
+/* checks whether the current v4lelement does video overlay */
+#define GST_V4L_CHECK_OVERLAY(element)                          \
+  if (!(element->vcap.type & VID_TYPE_OVERLAY))                 \
+  {                                                             \
+    GST_ELEMENT_ERROR (element, RESOURCE, TOO_LAZY,             \
+      (NULL), ("Device cannot handle overlay"));                \
+    return FALSE;                                               \
+  }
+
+/* checks whether we're in capture mode or not */
+#define GST_V4L_CHECK_ACTIVE(element)                           \
+  if (!GST_V4L_IS_ACTIVE (element))                             \
+  {                                                             \
+    GST_ELEMENT_ERROR (element, RESOURCE, SETTINGS,             \
+      (NULL), ("Device is not in streaming mode"));             \
+    return FALSE;                                               \
+  }
+
+/* checks whether we're out of capture mode or not */
+#define GST_V4L_CHECK_NOT_ACTIVE(element)                       \
+  if (GST_V4L_IS_ACTIVE (element))                              \
+  {                                                             \
+    GST_ELEMENT_ERROR (element, RESOURCE, SETTINGS,             \
+      (NULL), ("Device is in streaming mode"));                 \
+    return FALSE;                                               \
+  }
+
+
+typedef enum {
+  V4L_PICTURE_HUE = 0,
+  V4L_PICTURE_BRIGHTNESS,
+  V4L_PICTURE_CONTRAST,
+  V4L_PICTURE_SATURATION,
+} GstV4lPictureType;
+
+typedef enum {
+  V4L_AUDIO_VOLUME = 0,
+  V4L_AUDIO_MUTE,
+  V4L_AUDIO_MODE, /* stereo, mono, ... (see videodev.h) */
+} GstV4lAudioType;
+
+
+/* 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}) */
+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_get_signal     (GstV4lElement *v4lelement,
+                                 gint           tunernum,
+                                 guint         *signal);
+gboolean gst_v4l_get_frequency  (GstV4lElement *v4lelement,
+                                 gint           tunernum,
+                                 gulong        *frequency);
+gboolean gst_v4l_set_frequency  (GstV4lElement *v4lelement,
+                                 gint           tunernum,
+                                 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_get_audio      (GstV4lElement *v4lelement,
+                                 gint           audionum,
+                                 GstV4lAudioType type,
+                                 gint          *value);
+gboolean gst_v4l_set_audio      (GstV4lElement *v4lelement,
+                                 gint           audionum,
+                                 GstV4lAudioType type,
+                                 gint           value);
+
+/* functions that v4lsrc needs */
+gboolean gst_v4l_set_window_properties (GstV4lElement * v4lelement);
+gboolean gst_v4l_get_capabilities (GstV4lElement * v4lelement);
+
+
+G_END_DECLS
+
+
+#endif /* __V4L_CALLS_H__ */