Added gst-plugins-base-subtitles0.10-0.10.34 for Meego Harmattan 1.2

[mafwsubrenderer] / gst-plugins-base-subtitles0.10 / gst-libs / gst / interfaces / streamvolume.h

diff --git a/gst-plugins-base-subtitles0.10/gst-libs/gst/interfaces/streamvolume.h b/gst-plugins-base-subtitles0.10/gst-libs/gst/interfaces/streamvolume.h
new file mode 100644 (file)
index 0000000..32a824c
--- /dev/null
+++ b/gst-plugins-base-subtitles0.10/gst-libs/gst/interfaces/streamvolume.h
@@ -0,0 +1,87 @@
+/* GStreamer StreamVolume
+ * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * 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 __GST_STREAM_VOLUME_H__
+#define __GST_STREAM_VOLUME_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_STREAM_VOLUME \
+  (gst_stream_volume_get_type ())
+#define GST_STREAM_VOLUME(obj) \
+  (GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_STREAM_VOLUME, GstStreamVolume))
+#define GST_STREAM_VOLUME_INTERFACE(iface) \
+  (G_TYPE_CHECK_INTERFACE_CAST ((iface), GST_TYPE_STREAM_VOLUME, GstStreamVolumeInterface))
+#define GST_IS_STREAM_VOLUME(obj) \
+  (GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_STREAM_VOLUME))
+#define GST_IS_STREAM_VOLUME_INTERFACE(iface) \
+  (G_TYPE_CHECK_INTERFACE_TYPE ((iface), GST_TYPE_STREAM_VOLUME))
+#define GST_STREAM_VOLUME_GET_INTERFACE(inst) \
+  (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_STREAM_VOLUME, GstStreamVolumeInterface))
+
+typedef struct _GstStreamVolume GstStreamVolume;
+typedef struct _GstStreamVolumeInterface GstStreamVolumeInterface;
+
+struct _GstStreamVolumeInterface {
+  GTypeInterface parent;
+
+  /*< private >*/
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+/**
+ * GstStreamVolumeFormat:
+ * @GST_STREAM_VOLUME_FORMAT_LINEAR: Linear scale factor, 1.0 = 100%
+ * @GST_STREAM_VOLUME_FORMAT_CUBIC: Cubic volume scale
+ * @GST_STREAM_VOLUME_FORMAT_DB: Logarithmic volume scale (dB, amplitude not power)
+ *
+ * Different representations of a stream volume. gst_stream_volume_convert()
+ * allows to convert between the different representations.
+ *
+ * Formulas to convert from a linear to a cubic or dB volume are
+ * cbrt(val) and 20 * log10 (val).
+ * 
+ * Since: 0.10.25
+ */
+typedef enum {
+  GST_STREAM_VOLUME_FORMAT_LINEAR = 0,
+  GST_STREAM_VOLUME_FORMAT_CUBIC,
+  GST_STREAM_VOLUME_FORMAT_DB
+} GstStreamVolumeFormat;
+
+GType           gst_stream_volume_get_type        (void);
+void            gst_stream_volume_set_volume      (GstStreamVolume *volume,
+                                                   GstStreamVolumeFormat format,
+                                                   gdouble val);
+gdouble         gst_stream_volume_get_volume      (GstStreamVolume *volume,
+                                                   GstStreamVolumeFormat format);
+
+void            gst_stream_volume_set_mute        (GstStreamVolume *volume,
+                                                   gboolean mute);
+gboolean        gst_stream_volume_get_mute        (GstStreamVolume *volume);
+
+gdouble         gst_stream_volume_convert_volume  (GstStreamVolumeFormat from,
+                                                   GstStreamVolumeFormat to,
+                                                   gdouble val) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GST_STREAM_VOLUME_H__ */