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diff --git a/libAACdec/src/aacdec_hcrs.h b/libAACdec/src/aacdec_hcrs.h new file mode 100644 index 0000000..7a004c4 --- /dev/null +++ b/libAACdec/src/aacdec_hcrs.h @@ -0,0 +1,153 @@ + +/* ----------------------------------------------------------------------------------------------------------- +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_ + + + +#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_ */ + |