| |
| /* ----------------------------------------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2015 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): Josef Hoepfl |
| Description: DRM interface |
| |
| ******************************************************************************/ |
| |
| #ifndef TPDEC_DRM_H |
| #define TPDEC_DRM_H |
| |
| #include "tpdec_lib.h" |
| |
| |
| #include "FDK_crc.h" |
| |
| typedef struct { |
| |
| FDK_CRCINFO crcInfo; /* CRC state info */ |
| USHORT crcReadValue; /* CRC value read from bitstream data */ |
| |
| } STRUCT_DRM; |
| |
| typedef STRUCT_DRM *HANDLE_DRM; |
| |
| /*! |
| \brief Initialize DRM CRC |
| |
| The function initialzes the crc buffer and the crc lookup table. |
| |
| \return none |
| */ |
| void drmRead_CrcInit( HANDLE_DRM pDrm ); |
| |
| /** |
| * \brief Starts CRC region with a maximum number of bits |
| * If mBits is positive zero padding will be used for CRC calculation, if there |
| * are less than mBits bits available. |
| * If mBits is negative no zero padding is done. |
| * If mBits is zero the memory for the buffer is allocated dynamically, the |
| * number of bits is not limited. |
| * |
| * \param pDrm DRM data handle |
| * \param hBs bitstream handle, on which the CRC region referes to |
| * \param mBits max number of bits in crc region to be considered |
| * |
| * \return ID for the created region, -1 in case of an error |
| */ |
| int drmRead_CrcStartReg( |
| HANDLE_DRM pDrm, |
| HANDLE_FDK_BITSTREAM hBs, |
| int mBits |
| ); |
| |
| /** |
| * \brief Ends CRC region identified by reg |
| * |
| * \param pDrm DRM data handle |
| * \param hBs bitstream handle, on which the CRC region referes to |
| * \param reg CRC regions ID returned by drmRead_CrcStartReg() |
| * |
| * \return none |
| */ |
| void drmRead_CrcEndReg( |
| HANDLE_DRM pDrm, |
| HANDLE_FDK_BITSTREAM hBs, |
| int reg |
| ); |
| |
| /** |
| * \brief Check CRC |
| * |
| * Checks if the currently calculated CRC matches the CRC field read from the bitstream |
| * Deletes all CRC regions. |
| * |
| * \param pDrm DRM data handle |
| * |
| * \return Returns 0 if they are identical otherwise 1 |
| */ |
| TRANSPORTDEC_ERROR drmRead_CrcCheck( HANDLE_DRM pDrm ); |
| |
| /** |
| * \brief Check if we have a valid DRM frame at the current bitbuffer position |
| * |
| * This function assumes enough bits in buffer for the current frame. |
| * It reads out the header bits to prepare the bitbuffer for the decode loop. |
| * In case the header bits show an invalid bitstream/frame, the whole frame is skipped. |
| * |
| * \param pDrm DRM data handle which is filled with parsed DRM header data |
| * \param bs handle of bitstream from whom the DRM header is read |
| * |
| * \return error status |
| */ |
| TRANSPORTDEC_ERROR drmRead_DecodeHeader( |
| HANDLE_DRM pDrm, |
| HANDLE_FDK_BITSTREAM bs |
| ); |
| |
| /** |
| * \brief Parse a Drm specific SDC audio config from a given bitstream handle. |
| * |
| * \param pAsc A pointer to an allocated CSAudioSpecificConfig struct. |
| * \param hBs Bitstream handle. |
| * |
| * \return Total element count including all SCE, CPE and LFE. |
| */ |
| TRANSPORTDEC_ERROR DrmRawSdcAudioConfig_Parse( CSAudioSpecificConfig *pAsc, |
| HANDLE_FDK_BITSTREAM hBs ); |
| |
| |
| |
| #endif /* TPDEC_DRM_H */ |