| /* ----------------------------------------------------------------------------- | |
| 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 | |
| ----------------------------------------------------------------------------- */ | |
| /******************* MPEG transport format encoder library ********************* | |
| Author(s): | |
| Description: ADIF Transport Headers writing | |
| *******************************************************************************/ | |
| #include "tpenc_adif.h" | |
| #include "tpenc_lib.h" | |
| #include "tpenc_asc.h" | |
| int adifWrite_EncodeHeader(ADIF_INFO *adif, HANDLE_FDK_BITSTREAM hBs, | |
| INT adif_buffer_fullness) { | |
| /* ADIF/PCE/ADTS definitions */ | |
| const char adifId[5] = "ADIF"; | |
| const int copyRightIdPresent = 0; | |
| const int originalCopy = 0; | |
| const int home = 0; | |
| int err = 0; | |
| int i; | |
| INT totalBitRate = adif->bitRate; | |
| if (adif->headerWritten) return 0; | |
| /* Align inside PCE with respect to the first bit of the header */ | |
| UINT alignAnchor = FDKgetValidBits(hBs); | |
| /* Signal variable bitrate if buffer fullnes exceeds 20 bit */ | |
| adif->bVariableRate = (adif_buffer_fullness >= (INT)(0x1 << 20)) ? 1 : 0; | |
| FDKwriteBits(hBs, adifId[0], 8); | |
| FDKwriteBits(hBs, adifId[1], 8); | |
| FDKwriteBits(hBs, adifId[2], 8); | |
| FDKwriteBits(hBs, adifId[3], 8); | |
| FDKwriteBits(hBs, copyRightIdPresent ? 1 : 0, 1); | |
| if (copyRightIdPresent) { | |
| for (i = 0; i < 72; i++) { | |
| FDKwriteBits(hBs, 0, 1); | |
| } | |
| } | |
| FDKwriteBits(hBs, originalCopy ? 1 : 0, 1); | |
| FDKwriteBits(hBs, home ? 1 : 0, 1); | |
| FDKwriteBits(hBs, adif->bVariableRate ? 1 : 0, 1); | |
| FDKwriteBits(hBs, totalBitRate, 23); | |
| /* we write only one PCE at the moment */ | |
| FDKwriteBits(hBs, 0, 4); | |
| if (!adif->bVariableRate) { | |
| FDKwriteBits(hBs, adif_buffer_fullness, 20); | |
| } | |
| /* Write PCE */ | |
| transportEnc_writePCE(hBs, adif->cm, adif->samplingRate, adif->instanceTag, | |
| adif->profile, adif->matrixMixdownA, | |
| (adif->pseudoSurroundEnable) ? 1 : 0, alignAnchor); | |
| return err; | |
| } | |
| int adifWrite_GetHeaderBits(ADIF_INFO *adif) { | |
| /* ADIF definitions */ | |
| const int copyRightIdPresent = 0; | |
| if (adif->headerWritten) return 0; | |
| int bits = 0; | |
| bits += 8 * 4; /* ADIF ID */ | |
| bits += 1; /* Copyright present */ | |
| if (copyRightIdPresent) bits += 72; /* Copyright ID */ | |
| bits += 26; | |
| bits += 4; /* Number of PCE's */ | |
| if (!adif->bVariableRate) { | |
| bits += 20; | |
| } | |
| /* write PCE */ | |
| bits = transportEnc_GetPCEBits(adif->cm, adif->matrixMixdownA, bits); | |
| return bits; | |
| } |