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
---
 libSBRdec/src/sbr_ram.cpp | 136 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 libSBRdec/src/sbr_ram.cpp

(limited to 'libSBRdec/src/sbr_ram.cpp')

diff --git a/libSBRdec/src/sbr_ram.cpp b/libSBRdec/src/sbr_ram.cpp
new file mode 100644
index 0000000..6fa34a5
--- /dev/null
+++ b/libSBRdec/src/sbr_ram.cpp
@@ -0,0 +1,136 @@
+/****************************************************************************
+
+                     (C) Copyright Fraunhofer IIS (2005)
+                               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.
+
+
+   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.
+
+ $Id$
+
+*******************************************************************************/
+/*!
+  \file
+  \brief Memory layout
+  $Revision: 36841 $
+
+  This module declares all static and dynamic memory spaces
+*/
+
+#include "sbr_ram.h"
+
+
+
+
+#define WORKBUFFER1_TAG 0
+#define WORKBUFFER2_TAG 1
+
+/*!
+  \name StaticSbrData
+
+  Static memory areas, must not be overwritten in other sections of the decoder
+*/
+/* @{ */
+
+/*! SBR Decoder main structure */
+C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1)
+/*! SBR Decoder element data  <br>
+  Dimension: (4) */
+C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (4))
+/*! SBR Decoder individual channel data  <br>
+  Dimension: (6) */
+C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (6)+1)
+
+/*! Filter states for QMF-synthesis.  <br>
+  Dimension: #(6) * (#QMF_FILTER_STATE_SYN_SIZE-#(64)) */
+C_AALLOC_MEM2_L(Ram_sbr_QmfStatesSynthesis, FIXP_QSS, (640)-(64), (6)+1, SECT_DATA_L1)
+
+/*! Delayed spectral data needed for the dynamic framing of SBR.
+  For mp3PRO, 1/3 of a frame is buffered (#(6) 6) */
+C_AALLOC_MEM2(Ram_sbr_OverlapBuffer, FIXP_DBL, 2 * (6) * (64), (6)+1)
+
+/*! Static Data of PS */
+
+C_ALLOC_MEM(Ram_ps_dec, PS_DEC, 1)
+
+
+/* @} */
+
+
+/*!
+  \name DynamicSbrData
+
+  Dynamic memory areas, might be reused in other algorithm sections,
+  e.g. the core decoder
+  <br>
+  Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are
+  defined additionally to the CoreWorkbuffer.
+  <br>
+  The size of WorkBuffers is ((1024)/(32))*(64) = 2048.
+  <br>
+  WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR part. In case of
+  DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and the according
+  Workbuffer2 is defined locally in this file.
+  <br>
+  WorkBuffer1 is reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp)
+  <br>
+
+  Use of WorkBuffers:
+  <pre>
+
+    -------------------------------------------------------------
+    AAC core:
+
+      CoreWorkbuffer: spectral coefficients
+      WorkBuffer1:    CAacDecoderChannelInfo, CAacDecoderDynamicData
+
+    -------------------------------------------------------------
+    SBR part:
+      ----------------------------------------------
+      Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots()
+
+        SLOT_BASED_PROTOTYPE_SYN_FILTER
+
+        WorkBuffer1                                WorkBuffer2(=CoreWorkbuffer)
+         ________________                           ________________
+        | RealLeft       |                         | RealRight      |
+        |________________|                         |________________|
+
+      ----------------------------------------------
+      High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see assignHqTimeSlots()
+
+         SLOTBASED_PS
+
+         WorkBuffer1                                WorkBuffer2(=CoreWorkbuffer)
+         ________________                           ________________
+        | Real/Imag      |  interleaved            | Real/Imag      |  interleaved
+        |________________|  first half actual ch   |________________|  second half actual ch
+
+    -------------------------------------------------------------
+
+  </pre>
+
+*/
+/* @{ */
+C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer1, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L1, WORKBUFFER1_TAG)
+C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer2, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L2, WORKBUFFER2_TAG)
+
+/* @} */
+
+
+
+
-- 
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