1 files changed, 49 insertions, 0 deletions

diff --git a/lib/rbcodec/dsp/tdspeed.h b/lib/rbcodec/dsp/tdspeed.h
new file mode 100644
index 0000000000..e91eeb1701
--- /dev/null
+++ b/lib/rbcodec/dsp/tdspeed.h
@@ -0,0 +1,49 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Nicolas Pitre <nico@cam.org>
+ * Copyright (C) 2006-2007 by Stéphane Doyon <s.doyon@videotron.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef _TDSPEED_H
+#define _TDSPEED_H
+
+#include "dsp.h"
+
+#define TDSPEED_OUTBUFSIZE 4096
+
+/* some #define functions to get the pitch, stretch and speed values based on */
+/* two known values.  Remember that params are alphabetical.                  */
+#define GET_SPEED(pitch, stretch) \
+    ((pitch * stretch + PITCH_SPEED_100 / 2L) / PITCH_SPEED_100)
+#define GET_PITCH(speed, stretch) \
+    ((speed * PITCH_SPEED_100 + stretch / 2L) / stretch)
+#define GET_STRETCH(pitch, speed) \
+    ((speed * PITCH_SPEED_100 + pitch   / 2L) / pitch)
+
+void tdspeed_init(void);
+void tdspeed_finish(void);
+bool tdspeed_config(int samplerate, bool stereo, int32_t factor);
+long tdspeed_est_output_size(void);
+long tdspeed_est_input_size(long size);
+int tdspeed_doit(int32_t *src[], int count);
+
+#define STRETCH_MAX (250L * PITCH_SPEED_PRECISION) /* 250% */
+#define STRETCH_MIN (35L  * PITCH_SPEED_PRECISION) /* 35%  */
+
+#endif