1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /***************************** MPEG-4 AAC Decoder *************************** 85 86 Author(s): Robert Weidner (DSP Solutions) 87 Description: HCR Decoder: Defines of state-constants, masks and 88 state-prototypes 89 90 *******************************************************************************/ 91 92 #ifndef _AACDEC_HCRS_H_ 93 #define _AACDEC_HCRS_H_ 94 95 96 97 #include "FDK_bitstream.h" 98 #include "aacdec_hcr_types.h" 99 /* The four different kinds of types of states are: */ 100 /* different states are defined as constants */ /* start middle=self next stop */ 101 #define STOP_THIS_STATE 0 /* */ 102 #define BODY_ONLY 1 /* X X X */ 103 #define BODY_SIGN__BODY 2 /* X X X X [stop if no sign] */ 104 #define BODY_SIGN__SIGN 3 /* X X [stop if sign bits decoded] */ 105 #define BODY_SIGN_ESC__BODY 4 /* X X X X [stop if no sign] */ 106 #define BODY_SIGN_ESC__SIGN 5 /* X X X [stop if no escape sequence] */ 107 #define BODY_SIGN_ESC__ESC_PREFIX 6 /* X X */ 108 #define BODY_SIGN_ESC__ESC_WORD 7 /* X X X [stop if abs(second qsc) != 16] */ 109 110 /* examples: */ 111 112 /* BODY_ONLY means only the codeword body will be decoded; no sign bits will follow and no escapesequence will follow */ 113 114 /* BODY_SIGN__BODY means that the codeword consists of two parts; body and sign part. The part '__BODY' after the two underscores shows */ 115 /* that the bits which are currently decoded belong to the '__BODY' of the codeword and not to the sign part. */ 116 117 /* BODY_SIGN_ESC__ESC_PB means that the codeword consists of three parts; body, sign and (here: two) escape sequences; */ 118 /* P = Prefix = ones */ 119 /* W = Escape Word */ 120 /* A = first possible (of two) Escape sequeces */ 121 /* B = second possible (of two) Escape sequeces */ 122 /* The part after the two underscores shows that the current bits which are decoded belong to the '__ESC_PB' - part of the */ 123 /* codeword. That means the body and the sign bits are decoded completely and the bits which are decoded now belong to */ 124 /* the escape sequence [P = prefix; B=second possible escape sequence] */ 125 126 127 #define MSB_31_MASK 0x80000000 /* masks MSB (= Bit 31) in a 32 bit word */ 128 #define DIMENSION_OF_ESCAPE_CODEBOOK 2 /* for cb >= 11 is dimension 2 */ 129 #define ESCAPE_CODEBOOK 11 130 131 #define MASK_ESCAPE_PREFIX_UP 0x000F0000 132 #define LSB_ESCAPE_PREFIX_UP 16 133 134 #define MASK_ESCAPE_PREFIX_DOWN 0x0000F000 135 #define LSB_ESCAPE_PREFIX_DOWN 12 136 137 #define MASK_ESCAPE_WORD 0x00000FFF 138 #define MASK_FLAG_A 0x00200000 139 #define MASK_FLAG_B 0x00100000 140 141 142 extern void DecodeNonPCWs(HANDLE_FDK_BITSTREAM bs, H_HCR_INFO hHcr); 143 144 UINT Hcr_State_BODY_ONLY (HANDLE_FDK_BITSTREAM, void*); 145 UINT Hcr_State_BODY_SIGN__BODY (HANDLE_FDK_BITSTREAM, void*); 146 UINT Hcr_State_BODY_SIGN__SIGN (HANDLE_FDK_BITSTREAM, void*); 147 UINT Hcr_State_BODY_SIGN_ESC__BODY (HANDLE_FDK_BITSTREAM, void*); 148 UINT Hcr_State_BODY_SIGN_ESC__SIGN (HANDLE_FDK_BITSTREAM, void*); 149 UINT Hcr_State_BODY_SIGN_ESC__ESC_PREFIX (HANDLE_FDK_BITSTREAM, void*); 150 UINT Hcr_State_BODY_SIGN_ESC__ESC_WORD (HANDLE_FDK_BITSTREAM, void*); 151 152 #endif /* _AACDEC_HCRS_H_ */ 153 154
