From 9bf37cc9712506b2483650c82d3c41152337ef7e Mon Sep 17 00:00:00 2001
From: Dave Burke <daveburke@google.com>
Date: Tue, 17 Apr 2012 09:51:45 -0700
Subject: Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
---
 libAACdec/src/aacdec_tns.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 libAACdec/src/aacdec_tns.h

(limited to 'libAACdec/src/aacdec_tns.h')

diff --git a/libAACdec/src/aacdec_tns.h b/libAACdec/src/aacdec_tns.h
new file mode 100644
index 0000000..cf3f597
--- /dev/null
+++ b/libAACdec/src/aacdec_tns.h
@@ -0,0 +1,64 @@
+/*****************************  MPEG-4 AAC Decoder  **************************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Josef Hoepfl
+   Description: temporal noise shaping tool
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#ifndef TNS_H
+#define TNS_H
+
+#include "common_fix.h"
+
+enum
+{
+  TNS_MAX_WINDOWS = 8,    /* 8 */
+  TNS_MAXIMUM_ORDER   = 12,  /* 12 for AAC-LC and AAC-SSR. Set to 20 for AAC-Main (AOT 1). Some broken encoders also do order 20 for AAC-LC :( */
+  TNS_MAXIMUM_FILTERS = 3
+};
+
+typedef struct
+{
+  SCHAR Coeff[TNS_MAXIMUM_ORDER];
+
+  UCHAR StartBand;
+  UCHAR StopBand;
+
+  SCHAR Direction;
+  SCHAR Resolution;
+
+  UCHAR Order;
+} CFilter;
+
+typedef struct
+{
+  CFilter Filter[TNS_MAX_WINDOWS][TNS_MAXIMUM_FILTERS];
+  UCHAR NumberOfFilters[TNS_MAX_WINDOWS];
+  UCHAR DataPresent;
+  UCHAR Active;
+} CTnsData;
+
+void CTns_Reset(CTnsData *pTnsData);
+
+#endif /* #ifndef TNS_H */
-- 
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