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authorDave Burke <daveburke@google.com>2012-06-10 21:50:35 -0700
committerDave Burke <daveburke@google.com>2012-06-11 20:07:04 -0700
commit18a4af02f9a877b757be77babd190a2e0b44fbd2 (patch)
tree24cd840dc4022d293ecb0d4f47cdaa14486dc7c9 /libSBRdec/src/sbrdec_freq_sca.cpp
parent698b536f3b34a7cfc41a80e1034cc359456bdd66 (diff)
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Added license boilerplate to all source files.
Change-Id: I42a702487e6db4953dca0027710ea4fe266052fd Also: - Removed dead code in several source files. - Minor changes in comments. - No functional changes. No changes in executed code. - Added documentation PDFs.
Diffstat (limited to 'libSBRdec/src/sbrdec_freq_sca.cpp')
-rw-r--r--libSBRdec/src/sbrdec_freq_sca.cpp118
1 files changed, 87 insertions, 31 deletions
diff --git a/libSBRdec/src/sbrdec_freq_sca.cpp b/libSBRdec/src/sbrdec_freq_sca.cpp
index f48c7d0..b877545 100644
--- a/libSBRdec/src/sbrdec_freq_sca.cpp
+++ b/libSBRdec/src/sbrdec_freq_sca.cpp
@@ -1,31 +1,89 @@
-/****************************************************************************
- (C) Copyright Fraunhofer IIS (2004)
- All Rights Reserved
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
- Please be advised that this software and/or program delivery is
- Confidential Information of Fraunhofer and subject to and covered by the
+© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+ All rights reserved.
- Fraunhofer IIS Software Evaluation Agreement
- between Google Inc. and Fraunhofer
- effective and in full force since March 1, 2012.
+ 1. INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
- 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.
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
+may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
+individually for the purpose of encoding or decoding bit streams in products that are compliant with
+the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
+these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
+software may already be covered under those patent licenses when it is used for those licensed purposes only.
- 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.
+Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
+are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
+applications information and documentation.
- $Id$
+2. COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification, are permitted without
+payment of copyright license fees provided that you satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
+your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation and/or other materials
+provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
+You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived from this library without
+prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
+software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
+and the date of any change. For modified versions of the FDK AAC Codec, the term
+"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
+"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+
+3. NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
+ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
+respect to this software.
+
+You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
+by appropriate patent licenses.
+
+4. DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
+"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
+of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
+including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
+or business interruption, however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of this software, even if
+advised of the possibility of such damage.
+
+5. CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------------------------------------- */
-*******************************************************************************/
/*!
\file
- \brief Frequency scale calculation $Revision: 36841 $
+ \brief Frequency scale calculation
*/
#include "sbrdec_freq_sca.h"
@@ -151,27 +209,27 @@ getStopBand(UINT fs, /*!< Output sampling frequency */
if ( ((k2 - k0) > MAX_FREQ_COEFFS) || (k2 <= k0) ) {
return 255;
}
-
+
if (headerDataFlags & (SBRDEC_SYNTAX_USAC|SBRDEC_SYNTAX_RSVD50)) {
- /* 1 <= difference <= 35; 42000 <= fs <= 96000 */
- if ( (fs >= 42000) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS44100 ) ) {
+ /* 1 <= difference <= 35; 42000 <= fs <= 96000 */
+ if ( (fs >= 42000) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS44100 ) ) {
return 255;
}
- /* 1 <= difference <= 32; 46009 <= fs <= 96000 */
+ /* 1 <= difference <= 32; 46009 <= fs <= 96000 */
if ( (fs >= 46009) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS48000 ) ) {
return 255;
}
}
else {
- /* 1 <= difference <= 35; fs == 44100 */
- if ( (fs == 44100) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS44100 ) ) {
+ /* 1 <= difference <= 35; fs == 44100 */
+ if ( (fs == 44100) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS44100 ) ) {
return 255;
}
- /* 1 <= difference <= 32; 48000 <= fs <= 96000 */
+ /* 1 <= difference <= 32; 48000 <= fs <= 96000 */
if ( (fs >= 48000) && ( (k2 - k0) > MAX_FREQ_COEFFS_FS48000 ) ) {
return 255;
}
- }
+ }
return k2;
}
@@ -364,16 +422,14 @@ sbrdecUpdateFreqScale(UCHAR * v_k_master, /*!< Master table to be created */
*/
static FIXP_SGL calcFactorPerBand(int k_start, int k_stop, int num_bands)
{
-/* Changes CT fract class -> IIS fract class:
- * scaled bandfactor and step 1 bit right to avoid overflow
- * use CTdbouble data type */
+/* Scaled bandfactor and step 1 bit right to avoid overflow
+ * use double data type */
FIXP_DBL bandfactor = FL2FXCONST_DBL(0.25f); /* Start value */
FIXP_DBL step = FL2FXCONST_DBL(0.125f); /* Initial increment for factor */
int direction = 1;
-/* Changes CT fract class -> IIS fract class:
- * because saturation can't be done in INT IIS,
+/* Because saturation can't be done in INT IIS,
* changed start and stop data type from FIXP_SGL to FIXP_DBL */
FIXP_DBL start = k_start << (DFRACT_BITS-8);
FIXP_DBL stop = k_stop << (DFRACT_BITS-8);