| /* ----------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2018 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 |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** AAC decoder library ****************************** |
| |
| 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 |
| |
| #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 */ |
