From dacaa73ae5010b66f4224d70a520945e5b653544 Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Mon, 7 Dec 2009 09:56:32 -0800
Subject: Initial check in of stagefright software AAC decoder based on PV
 source code.

---
 media/libstagefright/codecs/aacdec/s_tnsfilt.h | 132 +++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 media/libstagefright/codecs/aacdec/s_tnsfilt.h

(limited to 'media/libstagefright/codecs/aacdec/s_tnsfilt.h')

diff --git a/media/libstagefright/codecs/aacdec/s_tnsfilt.h b/media/libstagefright/codecs/aacdec/s_tnsfilt.h
new file mode 100644
index 0000000..c1d78af
--- /dev/null
+++ b/media/libstagefright/codecs/aacdec/s_tnsfilt.h
@@ -0,0 +1,132 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 1998-2009 PacketVideo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+/*
+
+ Pathname: s_TNSfilt.h
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description: Added lpc, start, & size, so the data from
+ tns_inv_subblock can be shared with tns_decode_subblock.
+
+ Description: Removed lpc to save 2KB of memory (on 32-bit machines.)
+ This change requires tns_decode_coef.c to perform calculations in place.
+
+ Description: Removed start & size.  start_band and stop_band can simply
+ take on a new meaning after this function.  (coef index, rather than
+ scalefactor band index.)
+
+ Description: Had to add "start_coef" and "stop_coef" in order to preserve
+ values "start_band" and "stop_band."  This required a change to
+ tns_setup_filter.c also.
+
+ Description: Had to add element "q_lpc" to store the q-format of the lpc
+ coefficients passed via "coef."
+
+ Description: Moved lpc_coef array up to the s_TNS_frame_info.h structure.
+
+ Description:
+ (1) Modified to include the lines...
+
+    #ifdef __cplusplus
+    extern "C" {
+    #endif
+
+    #ifdef __cplusplus
+    }
+    #endif
+
+ (2) Updated the copyright header.
+
+ Who:                       Date:
+ Description:
+------------------------------------------------------------------------------
+ INCLUDE DESCRIPTION
+
+ This include file defines the structure, s_TNSfilt
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; CONTINUE ONLY IF NOT ALREADY DEFINED
+----------------------------------------------------------------------------*/
+#ifndef S_TNSFILT_H
+#define S_TNSFILT_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /*----------------------------------------------------------------------------
+    ; INCLUDES
+    ----------------------------------------------------------------------------*/
+#include "pv_audio_type_defs.h"
+#include "e_tns_const.h"
+
+    /*----------------------------------------------------------------------------
+    ; MACROS
+    ; Define module specific macros here
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; DEFINES
+    ; Include all pre-processor statements here.
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; EXTERNAL VARIABLES REFERENCES
+    ; Declare variables used in this module but defined elsewhere
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; SIMPLE TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; ENUMERATED TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+    /*----------------------------------------------------------------------------
+    ; STRUCTURES TYPEDEF'S
+    ----------------------------------------------------------------------------*/
+
+    typedef struct
+    {
+        Int start_band;
+        Int stop_band;
+        Int start_coef;
+        Int stop_coef;
+        UInt order;
+        Int direction;
+        Int q_lpc;
+
+    } TNSfilt;
+
+    /*----------------------------------------------------------------------------
+    ; GLOBAL FUNCTION DEFINITIONS
+    ; Function Prototype declaration
+    ----------------------------------------------------------------------------*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* S_TNSFILT_H */
-- 
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