/* ----------------------------------------------------------------------------- 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 surround encoder library ************************* Author(s): Christian Goettlinger Description: Encoder Library Interface delay management of the encoder *******************************************************************************/ /**************************************************************************/ /** \file This file contains all delay infrastructure ******************************************************************************/ /* Includes ******************************************************************/ #include "sacenc_delay.h" #include "sacenc_const.h" #include "FDK_matrixCalloc.h" /* Defines *******************************************************************/ /* Data Types ****************************************************************/ struct DELAY { struct DELAY_CONFIG { /* Routing Config Switches*/ INT bDmxAlign; INT bTimeDomDmx; INT bMinimizeDelay; INT bSacTimeAlignmentDynamicOut; /* Needed Input Variables*/ INT nQmfLen; INT nFrameLen; INT nSurroundDelay; INT nArbDmxDelay; INT nLimiterDelay; INT nCoreCoderDelay; INT nSacStreamMuxDelay; INT nSacTimeAlignment; /* Overwritten, if bSacTimeAlignmentDynamicOut */ } config; /* Variable Delaybuffers -> Delays */ INT nDmxAlignBuffer; INT nSurroundAnalysisBuffer; INT nArbDmxAnalysisBuffer; INT nOutputAudioBuffer; INT nBitstreamFrameBuffer; INT nOutputAudioQmfFrameBuffer; INT nDiscardOutFrames; /* Variable Delaybuffers Computation Variables */ INT nBitstreamFrameBufferSize; /* Output: Infos */ INT nInfoDmxDelay; /* Delay of the downmixed signal after the space encoder */ INT nInfoCodecDelay; /* Delay of the whole en-/decoder including CoreCoder */ INT nInfoDecoderDelay; /* Delay of the Mpeg Surround decoder */ }; /* Constants *****************************************************************/ /* Function / Class Declarations *********************************************/ /* Function / Class Definition ***********************************************/ /*----------------------------------------------------------------------------- functionname: fdk_sacenc_delay_Open() description: initializes Delays returns: noError on success, an apropriate error code else -----------------------------------------------------------------------------*/ FDK_SACENC_ERROR fdk_sacenc_delay_Open(HANDLE_DELAY *phDelay) { FDK_SACENC_ERROR error = SACENC_OK; if (NULL == phDelay) { error = SACENC_INVALID_HANDLE; } else { FDK_ALLOCATE_MEMORY_1D(*phDelay, 1, struct DELAY); } return error; bail: fdk_sacenc_delay_Close(phDelay); return ((SACENC_OK == error) ? SACENC_MEMORY_ERROR : error); } /*----------------------------------------------------------------------------- functionname: fdk_sacenc_delay_Close() description: destructs Delay returns: noError on success, an apropriate error code else -----------------------------------------------------------------------------*/ FDK_SACENC_ERROR fdk_sacenc_delay_Close(HANDLE_DELAY *phDelay) { FDK_SACENC_ERROR error = SACENC_OK; if (NULL == phDelay) { error = SACENC_INVALID_HANDLE; } else { if (NULL != *phDelay) { FDK_FREE_MEMORY_1D(*phDelay); } } return error; } FDK_SACENC_ERROR fdk_sacenc_delay_Init(HANDLE_DELAY hDelay, const INT nQmfLen, const INT nFrameLen, const INT nCoreCoderDelay, const INT nSacStreamMuxDelay) { FDK_SACENC_ERROR error = SACENC_OK; if (NULL == hDelay) { error = SACENC_INVALID_HANDLE; } else { /* Fill structure before calculation */ FDKmemclear(&hDelay->config, sizeof(hDelay->config)); hDelay->config.nQmfLen = nQmfLen; hDelay->config.nFrameLen = nFrameLen; hDelay->config.nCoreCoderDelay = nCoreCoderDelay; hDelay->config.nSacStreamMuxDelay = nSacStreamMuxDelay; } return error; } /*----------------------------------------------------------------------------- functionname: fdk_sacenc_delay_SubCalulateBufferDelays() description: Calculates the Delays of the buffers returns: Error Code -----------------------------------------------------------------------------*/ FDK_SACENC_ERROR fdk_sacenc_delay_SubCalulateBufferDelays(HANDLE_DELAY hDel) { FDK_SACENC_ERROR error = SACENC_OK; if (NULL == hDel) { error = SACENC_INVALID_HANDLE; } else { int nEncoderAnDelay, nEncoderSynDelay, nEncoderWinDelay, nDecoderAnDelay, nDecoderSynDelay, nResidualCoderFrameDelay, nArbDmxResidualCoderFrameDelay; if (hDel->config.bSacTimeAlignmentDynamicOut > 0) { hDel->config.nSacTimeAlignment = 0; } { nEncoderAnDelay = 2 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2; /* Only Ld-QMF Delay, no hybrid */ nEncoderSynDelay = 1 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2; nDecoderAnDelay = 2 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2; nDecoderSynDelay = 1 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2; nEncoderWinDelay = hDel->config.nFrameLen / 2; /* WindowLookahead is just half a frame */ } { nResidualCoderFrameDelay = 0; } { nArbDmxResidualCoderFrameDelay = 0; } /* Calculate variable Buffer-Delays */ if (hDel->config.bTimeDomDmx == 0) { /* ArbitraryDmx and TdDmx off */ int tempDelay; hDel->nSurroundAnalysisBuffer = 0; hDel->nArbDmxAnalysisBuffer = 0; tempDelay = nEncoderSynDelay + hDel->config.nLimiterDelay + hDel->config.nCoreCoderDelay + hDel->config.nSacTimeAlignment + nDecoderAnDelay; tempDelay = (nResidualCoderFrameDelay * hDel->config.nFrameLen) + hDel->config.nSacStreamMuxDelay - tempDelay; if (tempDelay > 0) { hDel->nBitstreamFrameBuffer = 0; hDel->nOutputAudioBuffer = tempDelay; } else { tempDelay = -tempDelay; hDel->nBitstreamFrameBuffer = (tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen; hDel->nOutputAudioBuffer = (hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen) - tempDelay; } hDel->nOutputAudioQmfFrameBuffer = (hDel->nOutputAudioBuffer + (hDel->config.nQmfLen / 2) - 1) / hDel->config.nQmfLen; if (hDel->config.bDmxAlign > 0) { tempDelay = nEncoderWinDelay + nEncoderAnDelay + nEncoderSynDelay + hDel->nOutputAudioBuffer + hDel->config.nLimiterDelay + hDel->config.nCoreCoderDelay; hDel->nDiscardOutFrames = (tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen; hDel->nDmxAlignBuffer = hDel->nDiscardOutFrames * hDel->config.nFrameLen - tempDelay; } else { hDel->nDiscardOutFrames = 0; hDel->nDmxAlignBuffer = 0; } /* Output: Info-Variables */ hDel->nInfoDmxDelay = hDel->nSurroundAnalysisBuffer + nEncoderAnDelay + nEncoderWinDelay + nEncoderSynDelay + hDel->nOutputAudioBuffer + hDel->config.nLimiterDelay; hDel->nInfoCodecDelay = hDel->nInfoDmxDelay + hDel->config.nCoreCoderDelay + hDel->config.nSacTimeAlignment + nDecoderAnDelay + nDecoderSynDelay; } else { /* ArbitraryDmx or TdDmx on */ int tempDelay1, tempDelay2, tempDelay12, tempDelay3; tempDelay1 = hDel->config.nArbDmxDelay - hDel->config.nSurroundDelay; if (tempDelay1 >= 0) { hDel->nSurroundAnalysisBuffer = tempDelay1; hDel->nArbDmxAnalysisBuffer = 0; } else { hDel->nSurroundAnalysisBuffer = 0; hDel->nArbDmxAnalysisBuffer = -tempDelay1; } tempDelay1 = nEncoderWinDelay + hDel->config.nSurroundDelay + hDel->nSurroundAnalysisBuffer + nEncoderAnDelay; /*Surround Path*/ tempDelay2 = nEncoderWinDelay + hDel->config.nArbDmxDelay + hDel->nArbDmxAnalysisBuffer + nEncoderAnDelay; /* ArbDmx Compare Path */ tempDelay3 = hDel->config.nArbDmxDelay + hDel->config.nLimiterDelay + hDel->config.nCoreCoderDelay + hDel->config.nSacTimeAlignment + nDecoderAnDelay; /* ArbDmx Passthrough*/ tempDelay12 = FDKmax(nResidualCoderFrameDelay, nArbDmxResidualCoderFrameDelay) * hDel->config.nFrameLen; tempDelay12 += hDel->config.nSacStreamMuxDelay; if (tempDelay1 > tempDelay2) { tempDelay12 += tempDelay1; } else { tempDelay12 += tempDelay2; } if (tempDelay3 > tempDelay12) { if (hDel->config.bMinimizeDelay > 0) { hDel->nBitstreamFrameBuffer = (tempDelay3 - tempDelay12) / hDel->config.nFrameLen; /*floor*/ hDel->nOutputAudioBuffer = 0; hDel->nSurroundAnalysisBuffer += (tempDelay3 - tempDelay12 - (hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen)); hDel->nArbDmxAnalysisBuffer += (tempDelay3 - tempDelay12 - (hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen)); } else { hDel->nBitstreamFrameBuffer = ((tempDelay3 - tempDelay12) + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen; hDel->nOutputAudioBuffer = hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen + tempDelay12 - tempDelay3; } } else { hDel->nBitstreamFrameBuffer = 0; hDel->nOutputAudioBuffer = tempDelay12 - tempDelay3; } if (hDel->config.bDmxAlign > 0) { int tempDelay = hDel->config.nArbDmxDelay + hDel->nOutputAudioBuffer + hDel->config.nLimiterDelay + hDel->config.nCoreCoderDelay; hDel->nDiscardOutFrames = (tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen; hDel->nDmxAlignBuffer = hDel->nDiscardOutFrames * hDel->config.nFrameLen - tempDelay; } else { hDel->nDiscardOutFrames = 0; hDel->nDmxAlignBuffer = 0; } /* Output: Info-Variables */ hDel->nInfoDmxDelay = hDel->config.nArbDmxDelay + hDel->nOutputAudioBuffer + hDel->config.nLimiterDelay; hDel->nInfoCodecDelay = hDel->nInfoDmxDelay + hDel->config.nCoreCoderDelay + hDel->config.nSacTimeAlignment + nDecoderAnDelay + nDecoderSynDelay; hDel->nInfoDecoderDelay = nDecoderAnDelay + nDecoderSynDelay; } /* ArbitraryDmx or TdDmx on */ /* Additonal Variables needed for Computation Issues */ hDel->nBitstreamFrameBufferSize = hDel->nBitstreamFrameBuffer + 1; } return error; } static FDK_SACENC_ERROR assignParameterInRange( const INT startRange, /* including startRange */ const INT stopRange, /* including stopRange */ const INT value, /* value to write*/ INT *const ptr /* destination pointer*/ ) { FDK_SACENC_ERROR error = SACENC_INVALID_CONFIG; if ((startRange <= value) && (value <= stopRange)) { *ptr = value; error = SACENC_OK; } return error; } FDK_SACENC_ERROR fdk_sacenc_delay_SetDmxAlign(HANDLE_DELAY hDelay, const INT bDmxAlignIn) { return (assignParameterInRange(0, 1, bDmxAlignIn, &hDelay->config.bDmxAlign)); } FDK_SACENC_ERROR fdk_sacenc_delay_SetTimeDomDmx(HANDLE_DELAY hDelay, const INT bTimeDomDmxIn) { return ( assignParameterInRange(0, 1, bTimeDomDmxIn, &hDelay->config.bTimeDomDmx)); } FDK_SACENC_ERROR fdk_sacenc_delay_SetSacTimeAlignmentDynamicOut( HANDLE_DELAY hDelay, const INT bSacTimeAlignmentDynamicOutIn) { return (assignParameterInRange(0, 1, bSacTimeAlignmentDynamicOutIn, &hDelay->config.bSacTimeAlignmentDynamicOut)); } FDK_SACENC_ERROR fdk_sacenc_delay_SetNSacTimeAlignment( HANDLE_DELAY hDelay, const INT nSacTimeAlignmentIn) { return (assignParameterInRange(-32768, 32767, nSacTimeAlignmentIn, &hDelay->config.nSacTimeAlignment)); } FDK_SACENC_ERROR fdk_sacenc_delay_SetMinimizeDelay(HANDLE_DELAY hDelay, const INT bMinimizeDelay) { return (assignParameterInRange(0, 1, bMinimizeDelay, &hDelay->config.bMinimizeDelay)); } INT fdk_sacenc_delay_GetOutputAudioBufferDelay(HANDLE_DELAY hDelay) { return (hDelay->nOutputAudioBuffer); } INT fdk_sacenc_delay_GetSurroundAnalysisBufferDelay(HANDLE_DELAY hDelay) { return (hDelay->nSurroundAnalysisBuffer); } INT fdk_sacenc_delay_GetArbDmxAnalysisBufferDelay(HANDLE_DELAY hDelay) { return (hDelay->nArbDmxAnalysisBuffer); } INT fdk_sacenc_delay_GetBitstreamFrameBufferSize(HANDLE_DELAY hDelay) { return (hDelay->nBitstreamFrameBufferSize); } INT fdk_sacenc_delay_GetDmxAlignBufferDelay(HANDLE_DELAY hDelay) { return (hDelay->nDmxAlignBuffer); } INT fdk_sacenc_delay_GetDiscardOutFrames(HANDLE_DELAY hDelay) { return (hDelay->nDiscardOutFrames); } INT fdk_sacenc_delay_GetInfoDmxDelay(HANDLE_DELAY hDelay) { return (hDelay->nInfoDmxDelay); } INT fdk_sacenc_delay_GetInfoCodecDelay(HANDLE_DELAY hDelay) { return (hDelay->nInfoCodecDelay); } INT fdk_sacenc_delay_GetInfoDecoderDelay(HANDLE_DELAY hDelay) { return (hDelay->nInfoDecoderDelay); }