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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+ All rights reserved.
+
+ 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.
+
+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.
+
+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.
+
+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
+----------------------------------------------------------------------------------------------------------- */
+
+/***************************** MPEG-4 AAC Decoder **************************
+
+ Author(s): Josef Hoepfl
+ Description: pulse data tool
+
+******************************************************************************/
+
+#include "pulsedata.h"
+
+
+#include "channelinfo.h"
+
+
+INT CPulseData_Read(
+ HANDLE_FDK_BITSTREAM bs,
+ CPulseData *const PulseData,
+ const SHORT *sfb_startlines,
+ const void *pIcsInfo,
+ const SHORT frame_length
+ )
+{
+ int i, k=0;
+ const UINT MaxSfBands = GetScaleFactorBandsTransmitted((CIcsInfo*)pIcsInfo);
+
+ /* reset pulse data flag */
+ PulseData->PulseDataPresent = 0;
+
+ if ((PulseData->PulseDataPresent = (UCHAR) FDKreadBit(bs)) != 0) {
+ if (!IsLongBlock((CIcsInfo*)pIcsInfo)) {
+ return AAC_DEC_DECODE_FRAME_ERROR;
+ }
+
+ PulseData->NumberPulse = (UCHAR) FDKreadBits(bs,2);
+ PulseData->PulseStartBand = (UCHAR) FDKreadBits(bs,6);
+
+ if (PulseData->PulseStartBand >= MaxSfBands) {
+ return AAC_DEC_DECODE_FRAME_ERROR;
+ }
+
+ k = sfb_startlines[PulseData->PulseStartBand];
+
+ for (i=0; i<=PulseData->NumberPulse; i++) {
+ PulseData->PulseOffset[i] = (UCHAR) FDKreadBits(bs,5);
+ PulseData->PulseAmp[i] = (UCHAR) FDKreadBits(bs,4);
+ k += PulseData->PulseOffset[i];
+ }
+
+ if (k >= frame_length) {
+ return AAC_DEC_DECODE_FRAME_ERROR;
+ }
+ }
+
+
+ return 0;
+}
+
+void CPulseData_Apply(CPulseData *PulseData, /*!< pointer to pulse data side info */
+ const short *pScaleFactorBandOffsets, /*!< pointer to scalefactor band offsets */
+ FIXP_DBL *coef) /*!< pointer to spectrum */
+{
+ int i,k;
+
+ if (PulseData->PulseDataPresent)
+ {
+ k = pScaleFactorBandOffsets[PulseData->PulseStartBand];
+
+ for (i=0; i<=PulseData->NumberPulse; i++)
+ {
+ k += PulseData->PulseOffset[i];
+ if (coef [k] > (FIXP_DBL)0) coef[k] += (FIXP_DBL)(int)PulseData->PulseAmp[i];
+ else coef[k] -= (FIXP_DBL)(int)PulseData->PulseAmp[i];
+ }
+ }
+}
+