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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): Robert Weidner (DSP Solutions) |
| Description: HCR Decoder: Defines of state-constants, masks and |
| state-prototypes |
| |
| *******************************************************************************/ |
| |
| #ifndef _AACDEC_HCRS_H_ |
| #define _AACDEC_HCRS_H_ |
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| |
| |
| #include "FDK_bitstream.h" |
| #include "aacdec_hcr_types.h" |
| /* The four different kinds of types of states are: */ |
| /* different states are defined as constants */ /* start middle=self next stop */ |
| #define STOP_THIS_STATE 0 /* */ |
| #define BODY_ONLY 1 /* X X X */ |
| #define BODY_SIGN__BODY 2 /* X X X X [stop if no sign] */ |
| #define BODY_SIGN__SIGN 3 /* X X [stop if sign bits decoded] */ |
| #define BODY_SIGN_ESC__BODY 4 /* X X X X [stop if no sign] */ |
| #define BODY_SIGN_ESC__SIGN 5 /* X X X [stop if no escape sequence] */ |
| #define BODY_SIGN_ESC__ESC_PREFIX 6 /* X X */ |
| #define BODY_SIGN_ESC__ESC_WORD 7 /* X X X [stop if abs(second qsc) != 16] */ |
| |
| /* examples: */ |
| |
| /* BODY_ONLY means only the codeword body will be decoded; no sign bits will follow and no escapesequence will follow */ |
| |
| /* BODY_SIGN__BODY means that the codeword consists of two parts; body and sign part. The part '__BODY' after the two underscores shows */ |
| /* that the bits which are currently decoded belong to the '__BODY' of the codeword and not to the sign part. */ |
| |
| /* BODY_SIGN_ESC__ESC_PB means that the codeword consists of three parts; body, sign and (here: two) escape sequences; */ |
| /* P = Prefix = ones */ |
| /* W = Escape Word */ |
| /* A = first possible (of two) Escape sequeces */ |
| /* B = second possible (of two) Escape sequeces */ |
| /* The part after the two underscores shows that the current bits which are decoded belong to the '__ESC_PB' - part of the */ |
| /* codeword. That means the body and the sign bits are decoded completely and the bits which are decoded now belong to */ |
| /* the escape sequence [P = prefix; B=second possible escape sequence] */ |
| |
| |
| #define MSB_31_MASK 0x80000000 /* masks MSB (= Bit 31) in a 32 bit word */ |
| #define DIMENSION_OF_ESCAPE_CODEBOOK 2 /* for cb >= 11 is dimension 2 */ |
| #define ESCAPE_CODEBOOK 11 |
| |
| #define MASK_ESCAPE_PREFIX_UP 0x000F0000 |
| #define LSB_ESCAPE_PREFIX_UP 16 |
| |
| #define MASK_ESCAPE_PREFIX_DOWN 0x0000F000 |
| #define LSB_ESCAPE_PREFIX_DOWN 12 |
| |
| #define MASK_ESCAPE_WORD 0x00000FFF |
| #define MASK_FLAG_A 0x00200000 |
| #define MASK_FLAG_B 0x00100000 |
| |
| |
| extern void DecodeNonPCWs(HANDLE_FDK_BITSTREAM bs, H_HCR_INFO hHcr); |
| |
| UINT Hcr_State_BODY_ONLY (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN__BODY (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN__SIGN (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN_ESC__BODY (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN_ESC__SIGN (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN_ESC__ESC_PREFIX (HANDLE_FDK_BITSTREAM, void*); |
| UINT Hcr_State_BODY_SIGN_ESC__ESC_WORD (HANDLE_FDK_BITSTREAM, void*); |
| |
| #endif /* _AACDEC_HCRS_H_ */ |
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