12228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 22228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* ----------------------------------------------------------------------------------------------------------- 32228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectSoftware License for The Fraunhofer FDK AAC Codec Library for Android 42228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 54f0d97057c5c640b25518358886f8c47da9fc052Jean-Michel Trivi� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 62228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project All rights reserved. 72228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 82228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1. INTRODUCTION 92228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 112228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is intended to be used on a wide variety of Android devices. 122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 132228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectaudio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindependent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof the MPEG specifications. 172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 182228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectPatent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmay be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindividually for the purpose of encoding or decoding bit streams in products that are compliant with 212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthese patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware may already be covered under those patent licenses when it is used for those licensed purposes only. 242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 252228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCommercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectare also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectapplications information and documentation. 282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project2. COPYRIGHT LICENSE 302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 312228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectRedistribution and use in source and binary forms, with or without modification, are permitted without 322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectpayment of copyright license fees provided that you satisfy the following conditions: 332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 342228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in redistributions of the FDK AAC Codec or 352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectyour modifications thereto in source code form. 362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 372228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in the documentation and/or other materials 382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprovided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 392228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must make available free of charge copies of the complete source code of the FDK AAC Codec and your 402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmodifications thereto to recipients of copies in binary form. 412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 422228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe name of Fraunhofer may not be used to endorse or promote products derived from this library without 432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprior written permission. 442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 452228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware or your modifications thereto. 472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 482228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYour modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectand the date of any change. For modified versions of the FDK AAC Codec, the term 502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project3. NO PATENT LICENSE 542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 552228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectNO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 562228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectrespect to this software. 582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 592228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectby appropriate patent licenses. 612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project4. DISCLAIMER 632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 642228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 672228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectincluding but not limited to procurement of substitute goods or services; loss of use, data, or profits, 692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projector business interruption, however caused and on any theory of liability, whether in contract, strict 702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectliability, or tort (including negligence), arising in any way out of the use of this software, even if 712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectadvised of the possibility of such damage. 722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project5. CONTACT INFORMATION 742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 752228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFraunhofer Institute for Integrated Circuits IIS 762228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAttention: Audio and Multimedia Departments - FDK AAC LL 772228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAm Wolfsmantel 33 782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project91058 Erlangen, Germany 792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectwww.iis.fraunhofer.de/amm 812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectamm-info@iis.fraunhofer.de 822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project----------------------------------------------------------------------------------------------------------- */ 832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************** MPEG-4 AAC Decoder ************************** 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Author(s): Josef Hoepfl 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Description: ADTS interface 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project******************************************************************************/ 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "tpdec_adts.h" 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "FDK_bitstream.h" 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid adtsRead_CrcInit(HANDLE_ADTS pAdts) /*!< pointer to adts crc info stucture */ 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKcrcInit(&pAdts->crcInfo, 0x8005, 0xFFFF, 16); 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectint adtsRead_CrcStartReg( 1042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_ADTS pAdts, /*!< pointer to adts stucture */ 1052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */ 1062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int mBits /*!< number of bits in crc region */ 1072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.protection_absent) { 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return 0; 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return ( FDKcrcStartReg(&pAdts->crcInfo, hBs, mBits) ); 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid adtsRead_CrcEndReg( 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_ADTS pAdts, /*!< pointer to adts crc info stucture */ 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */ 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int reg /*!< crc region */ 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.protection_absent == 0) 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKcrcEndReg(&pAdts->crcInfo, hBs, reg); 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectTRANSPORTDEC_ERROR adtsRead_CrcCheck( HANDLE_ADTS pAdts ) 1302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK; 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project USHORT crc; 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.protection_absent) 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_OK; 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project crc = FDKcrcGetCRC(&pAdts->crcInfo); 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (crc != pAdts->crcReadValue) 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return (TRANSPORTDEC_CRC_ERROR); 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return (ErrorStatus); 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_SyncWord 12 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_Id 1 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_Layer 2 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_ProtectionAbsent 1 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_Profile 2 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_SamplingFrequencyIndex 4 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_PrivateBit 1 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_ChannelConfiguration 3 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_OriginalCopy 1 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_Home 1 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_CopyrightIdentificationBit 1 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_CopyrightIdentificationStart 1 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_FrameLength 13 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_BufferFullness 11 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_NumberOfRawDataBlocksInFrame 2 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define Adts_Length_CrcCheck 16 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectTRANSPORTDEC_ERROR adtsRead_DecodeHeader( 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_ADTS pAdts, 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project CSAudioSpecificConfig *pAsc, 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_FDK_BITSTREAM hBs, 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT ignoreBufferFullness 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT crcReg; 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT valBits; 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT cmp_buffer_fullness; 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int i, adtsHeaderLength; 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project STRUCT_ADTS_BS bs; 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifdef TP_PCE_ENABLE 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project CProgramConfig oldPce; 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Store the old PCE temporarily. Maybe we'll need it later if we 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project have channelConfig=0 and no PCE in this frame. */ 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(&oldPce, &pAsc->m_progrConfigElement, sizeof(CProgramConfig)); 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project valBits = FDKgetValidBits(hBs); 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* adts_fixed_header */ 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.mpeg_id = FDKreadBits(hBs, Adts_Length_Id); 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.layer = FDKreadBits(hBs, Adts_Length_Layer); 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.protection_absent = FDKreadBits(hBs, Adts_Length_ProtectionAbsent); 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.profile = FDKreadBits(hBs, Adts_Length_Profile); 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.sample_freq_index = FDKreadBits(hBs, Adts_Length_SamplingFrequencyIndex); 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.private_bit = FDKreadBits(hBs, Adts_Length_PrivateBit); 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.channel_config = FDKreadBits(hBs, Adts_Length_ChannelConfiguration); 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.original = FDKreadBits(hBs, Adts_Length_OriginalCopy); 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.home = FDKreadBits(hBs, Adts_Length_Home); 1992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* adts_variable_header */ 2012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.copyright_id = FDKreadBits(hBs, Adts_Length_CopyrightIdentificationBit); 2022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.copyright_start = FDKreadBits(hBs, Adts_Length_CopyrightIdentificationStart); 2032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.frame_length = FDKreadBits(hBs, Adts_Length_FrameLength); 2042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.adts_fullness = FDKreadBits(hBs, Adts_Length_BufferFullness); 2052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.num_raw_blocks = FDKreadBits(hBs, Adts_Length_NumberOfRawDataBlocksInFrame); 2062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.num_pce_bits = 0; 2072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project adtsHeaderLength = ADTS_HEADERLENGTH; 2092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (!bs.protection_absent) { 2112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKcrcReset(&pAdts->crcInfo); 2122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushBack(hBs, 56); /* complete fixed and variable header! */ 2132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project crcReg = FDKcrcStartReg(&pAdts->crcInfo, hBs, 0); 2142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushFor(hBs, 56); 2152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (! bs.protection_absent && bs.num_raw_blocks>0) { 2182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i=0; i<bs.num_raw_blocks; i++) { 2192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAdts->rawDataBlockDist[i] = (USHORT)FDKreadBits(hBs, 16); 2202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project adtsHeaderLength += 16; 2212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Change raw data blocks to delta values */ 2232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAdts->rawDataBlockDist[bs.num_raw_blocks] = bs.frame_length - 7 - bs.num_raw_blocks*2 - 2 ; 2242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i=bs.num_raw_blocks; i>0; i--) { 2252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAdts->rawDataBlockDist[i] -= pAdts->rawDataBlockDist[i-1]; 2262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* adts_error_check */ 2302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (!bs.protection_absent) 2312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project USHORT crc_check; 2332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKcrcEndReg(&pAdts->crcInfo, hBs, crcReg); 2352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project crc_check = FDKreadBits(hBs, Adts_Length_CrcCheck); 2362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project adtsHeaderLength += Adts_Length_CrcCheck; 2372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAdts->crcReadValue = crc_check; 2392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Check header CRC in case of multiple raw data blocks */ 2402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (bs.num_raw_blocks > 0) { 2412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->crcReadValue != FDKcrcGetCRC(&pAdts->crcInfo)) { 2422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_CRC_ERROR; 2432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Reset CRC for the upcoming raw_data_block() */ 2452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKcrcReset(&pAdts->crcInfo); 2462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* check if valid header */ 2512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( 2522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (bs.layer != 0) || // we only support MPEG ADTS 2532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (bs.sample_freq_index >= 13) // we only support 96kHz - 7350kHz 2542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) { 2552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushFor(hBs, bs.frame_length * 8); // try again one frame later 2562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_UNSUPPORTED_FORMAT; 2572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* special treatment of id-bit */ 2602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( (bs.mpeg_id == 0) && (pAdts->decoderCanDoMpeg4 == 0) ) 2612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* MPEG-2 decoder cannot play MPEG-4 bitstreams */ 2632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushFor(hBs, bs.frame_length * 8); // try again one frame later 2662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_UNSUPPORTED_FORMAT; 2672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (!ignoreBufferFullness) 2702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project cmp_buffer_fullness = bs.frame_length*8 + bs.adts_fullness*32*getNumberOfEffectiveChannels(bs.channel_config); 2722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Evaluate buffer fullness */ 2752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (bs.adts_fullness != 0x7FF) 2762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->BufferFullnesStartFlag) 2782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( valBits < cmp_buffer_fullness ) 2802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Condition for start of decoding is not fulfilled */ 2822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* The current frame will not be decoded */ 2842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushBack(hBs, adtsHeaderLength); 2852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( (cmp_buffer_fullness+adtsHeaderLength) > ((TRANSPORTDEC_INBUF_SIZE<<3)-7) ) { 2872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_SYNC_ERROR; 2882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else { 2892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_NOT_ENOUGH_BITS; 2902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 2932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAdts->BufferFullnesStartFlag = 0; 2952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Get info from ADTS header */ 3022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project AudioSpecificConfig_Init(pAsc); 3032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAsc->m_aot = (AUDIO_OBJECT_TYPE)(bs.profile + 1); 3042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAsc->m_samplingFrequencyIndex = bs.sample_freq_index; 3052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAsc->m_samplingFrequency = SamplingRateTable[bs.sample_freq_index]; 3062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAsc->m_channelConfiguration = bs.channel_config; 3072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pAsc->m_samplesPerFrame = 1024; 3082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifdef TP_PCE_ENABLE 3102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (bs.channel_config == 0) 3112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 3122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int pceBits = 0; 3132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT alignAnchor = FDKgetValidBits(hBs); 3142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (FDKreadBits(hBs,3) == ID_PCE) { 3162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Got luck! Parse the PCE */ 3172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int crcReg; 3182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project crcReg = adtsRead_CrcStartReg(pAdts, hBs, 0); 3192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project CProgramConfig_Read(&pAsc->m_progrConfigElement, hBs, alignAnchor); 3212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project adtsRead_CrcEndReg(pAdts, hBs, crcReg); 3232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pceBits = alignAnchor - FDKgetValidBits(hBs); 3242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* store the number of PCE bits */ 3252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project bs.num_pce_bits = pceBits; 3262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 3282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* No PCE in this frame! Push back the ID tag bits. */ 3292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushBack(hBs,3); 3302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Encoders do not have to write a PCE in each frame. 3322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project So if we already have a valid PCE we have to use it. */ 3332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( oldPce.isValid 3342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && (bs.sample_freq_index == pAdts->bs.sample_freq_index) /* we could compare the complete fixed header (bytes) here! */ 3352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && (bs.channel_config == pAdts->bs.channel_config) /* == 0 */ 3362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && (bs.mpeg_id == pAdts->bs.mpeg_id) ) 3372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { /* Restore previous PCE which is still valid */ 3382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(&pAsc->m_progrConfigElement, &oldPce, sizeof(CProgramConfig)); 3392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else if (bs.mpeg_id == 0) { 3412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* If not it seems that we have a implicit channel configuration. 3422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project This mode is not allowed in the context of ISO/IEC 14496-3. 3432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Skip this frame and try the next one. */ 3442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKpushFor(hBs, (bs.frame_length<<3) - adtsHeaderLength - 3); 3452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_UNSUPPORTED_FORMAT; 3462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* else { 3482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ISO/IEC 13818-7 implicit channel mapping is allowed. 3492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project So just open the box of chocolates to see what we got. 3502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } */ 3512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif /* TP_PCE_ENABLE */ 3542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Copy bit stream data struct to persistent memory now, once we passed all sanity checks above. */ 3562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(&pAdts->bs, &bs, sizeof(STRUCT_ADTS_BS)); 3572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return TRANSPORTDEC_OK; 3592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectint adtsRead_GetRawDataBlockLength( 3622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project HANDLE_ADTS pAdts, 3632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT blockNum 3642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 3652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int length; 3672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.num_raw_blocks == 0) { 3692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project length = (pAdts->bs.frame_length - 7) << 3; /* aac_frame_length subtracted by the header size (7 bytes). */ 3702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.protection_absent == 0) 3712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project length -= 16; /* substract 16 bit CRC */ 3722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else { 3732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (pAdts->bs.protection_absent) { 3742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project length = -1; /* raw data block length is unknown */ 3752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else { 3762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockNum < 0 || blockNum > 3) { 3775016eb7f6582fbb2d72d79be782325a12df08864Jean-Michel Trivi length = -1; 3782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project length = (pAdts->rawDataBlockDist[blockNum] << 3) - 16; 3802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3825016eb7f6582fbb2d72d79be782325a12df08864Jean-Michel Trivi if (blockNum == 0 && length > 0) { 3832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project length -= pAdts->bs.num_pce_bits; 3842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return length; 3862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 389