this adds video4linux2 source and element plugins. The division in v4l2* plugins is the same as for v4l1 - i.e. an el...

Original commit message from CVS:
this adds video4linux2 source and element plugins. The division in v4l2* plugins is the same as for v4l1 - i.e. an element, a src and a sink, but there won't be separate encoding plugins (like v4lmjpegsrc) - all functionality is (thanks to video4linux2) integrated in one plugin: v4l2src. v4l2sink is still to be done, that'll come later.

1 files changed, 135 insertions, 0 deletions

diff --git a/sys/v4l2/v4l2_calls.h b/sys/v4l2/v4l2_calls.h
new file mode 100644
index 000000000..ce562d479
--- /dev/null
+++ b/sys/v4l2/v4l2_calls.h
@@ -0,0 +1,135 @@
+/* G-Streamer generic V4L2 element - generic V4L2 calls handling
+ * Copyright (C) 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 __V4L2_CALLS_H__
+#define __V4L2_CALLS_H__
+
+#include "gstv4l2element.h"
+
+
+/* simple check whether the device is open */
+#define GST_V4L2_IS_OPEN(v4l2element) \
+  (v4l2element->video_fd > 0)
+
+/* check whether the device is 'active' */
+#define GST_V4L2_IS_ACTIVE(v4l2element) \
+  (v4l2element->buffer != NULL)
+
+#define GST_V4L2_IS_OVERLAY(v4l2element) \
+  (v4l2element->vcap.flags & V4L2_FLAG_PREVIEW)
+
+/* checks whether the current v4lelement has already been open()'ed or not */
+#define GST_V4L2_CHECK_OPEN(v4l2element) \
+  if (v4l2element->video_fd <= 0)               \
+  {                                             \
+    gst_element_error(GST_ELEMENT(v4l2element), \
+      "Device is not open");                    \
+    return FALSE;                               \
+  }
+
+/* checks whether the current v4lelement is close()'ed or whether it is still open */
+#define GST_V4L2_CHECK_NOT_OPEN(v4l2element) \
+  if (v4l2element->video_fd != -1)              \
+  {                                             \
+    gst_element_error(GST_ELEMENT(v4l2element), \
+      "Device is open");                        \
+    return FALSE;                               \
+  }
+
+/* checks whether the current v4lelement does video overlay */
+#define GST_V4L2_CHECK_OVERLAY(v4l2element) \
+  if (!(v4l2element->vcap.flags & V4L2_FLAG_PREVIEW)) \
+  {                                                   \
+    gst_element_error(GST_ELEMENT(v4l2element),       \
+      "Device doesn't do overlay");                   \
+    return FALSE;                                     \
+  }
+
+/* checks whether we're in capture mode or not */
+#define GST_V4L2_CHECK_ACTIVE(v4l2element) \
+  if (v4l2element->buffer == NULL)              \
+  {                                             \
+    gst_element_error(GST_ELEMENT(v4l2element), \
+      "Device is not in streaming mode");       \
+    return FALSE;                               \
+  }
+
+/* checks whether we're out of capture mode or not */
+#define GST_V4L2_CHECK_NOT_ACTIVE(v4l2element) \
+  if (v4l2element->buffer != NULL)              \
+  {                                             \
+    gst_element_error(GST_ELEMENT(v4l2element), \
+      "Device is in streaming mode");           \
+    return FALSE;                               \
+  }
+
+
+/* open/close the device */
+gboolean	gst_v4l2_open			(GstV4l2Element *v4l2element);
+gboolean	gst_v4l2_close			(GstV4l2Element *v4l2element);
+
+/* norm/input/output */
+gboolean	gst_v4l2_get_norm		(GstV4l2Element *v4l2element,
+						 gint           *norm);
+gboolean	gst_v4l2_set_norm		(GstV4l2Element *v4l2element,
+						 gint            norm);
+GList *		gst_v4l2_get_norm_names		(GstV4l2Element *v4l2element);
+gboolean	gst_v4l2_get_input		(GstV4l2Element *v4l2element,
+						 gint           *input);
+gboolean	gst_v4l2_set_input		(GstV4l2Element *v4l2element,
+						 gint            input);
+GList *		gst_v4l2_get_input_names	(GstV4l2Element *v4l2element);
+gboolean	gst_v4l2_get_output		(GstV4l2Element *v4l2element,
+						 gint           *output);
+gboolean	gst_v4l2_set_output		(GstV4l2Element *v4l2element,
+						 gint            output);
+GList *		gst_v4l2_get_output_names	(GstV4l2Element *v4l2element);
+
+/* frequency control */
+gboolean	gst_v4l2_has_tuner		(GstV4l2Element *v4l2element);
+gboolean	gst_v4l2_get_frequency		(GstV4l2Element *v4l2element,
+						 gulong         *frequency);
+gboolean	gst_v4l2_set_frequency		(GstV4l2Element *v4l2element,
+					 	gulong          frequency);
+gboolean	gst_v4l2_signal_strength	(GstV4l2Element *v4l2element,
+						 gulong         *signal_strength);
+
+/* attribute control */
+gboolean	gst_v4l2_has_audio		(GstV4l2Element *v4l2element);
+GList *		gst_v4l2_get_attributes		(GstV4l2Element *v4l2element);
+gboolean	gst_v4l2_get_attribute		(GstV4l2Element *v4l2element,
+						 gint            attribute_num,
+						 gint           *value);
+gboolean	gst_v4l2_set_attribute		(GstV4l2Element *v4l2element,
+						 gint            attribute_num,
+						 gint            value);
+
+/* overlay */
+gboolean	gst_v4l2_set_display		(GstV4l2Element *v4l2element,
+						 const gchar    *display);
+gboolean	gst_v4l2_set_window		(GstV4l2Element *v4l2element,
+						 gint x,         gint y,
+						 gint w,         gint h);
+gboolean	gst_v4l2_set_clips		(GstV4l2Element *v4l2element,
+						 struct v4l2_clip *clips,
+						 gint            num_clips);
+gboolean	gst_v4l2_enable_overlay		(GstV4l2Element *v4l2element,
+						 gboolean        enable);
+
+#endif /* __V4L2_CALLS_H__ */