/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/*********************** MPEG surround encoder library *************************
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Author(s): Christian Goettlinger
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Description: Encoder Library Interface
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delay management of the encoder
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*******************************************************************************/
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/**************************************************************************/ /**
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\file
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This file contains all delay infrastructure
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******************************************************************************/
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/* Includes ******************************************************************/
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#include "sacenc_delay.h"
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#include "sacenc_const.h"
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#include "FDK_matrixCalloc.h"
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/* Defines *******************************************************************/
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/* Data Types ****************************************************************/
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struct DELAY {
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struct DELAY_CONFIG {
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/* Routing Config Switches*/
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INT bDmxAlign;
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INT bTimeDomDmx;
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INT bMinimizeDelay;
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INT bSacTimeAlignmentDynamicOut;
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/* Needed Input Variables*/
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INT nQmfLen;
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INT nFrameLen;
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INT nSurroundDelay;
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INT nArbDmxDelay;
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INT nLimiterDelay;
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INT nCoreCoderDelay;
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INT nSacStreamMuxDelay;
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INT nSacTimeAlignment; /* Overwritten, if bSacTimeAlignmentDynamicOut */
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} config;
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/* Variable Delaybuffers -> Delays */
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INT nDmxAlignBuffer;
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INT nSurroundAnalysisBuffer;
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INT nArbDmxAnalysisBuffer;
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INT nOutputAudioBuffer;
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INT nBitstreamFrameBuffer;
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INT nOutputAudioQmfFrameBuffer;
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INT nDiscardOutFrames;
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/* Variable Delaybuffers Computation Variables */
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INT nBitstreamFrameBufferSize;
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/* Output: Infos */
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INT nInfoDmxDelay; /* Delay of the downmixed signal after the space encoder */
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INT nInfoCodecDelay; /* Delay of the whole en-/decoder including CoreCoder */
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INT nInfoDecoderDelay; /* Delay of the Mpeg Surround decoder */
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};
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/* Constants *****************************************************************/
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/* Function / Class Declarations *********************************************/
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/* Function / Class Definition ***********************************************/
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/*-----------------------------------------------------------------------------
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functionname: fdk_sacenc_delay_Open()
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description: initializes Delays
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returns: noError on success, an apropriate error code else
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-----------------------------------------------------------------------------*/
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FDK_SACENC_ERROR fdk_sacenc_delay_Open(HANDLE_DELAY *phDelay) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == phDelay) {
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error = SACENC_INVALID_HANDLE;
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} else {
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FDK_ALLOCATE_MEMORY_1D(*phDelay, 1, struct DELAY);
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}
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return error;
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bail:
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fdk_sacenc_delay_Close(phDelay);
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return ((SACENC_OK == error) ? SACENC_MEMORY_ERROR : error);
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}
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/*-----------------------------------------------------------------------------
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functionname: fdk_sacenc_delay_Close()
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description: destructs Delay
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returns: noError on success, an apropriate error code else
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-----------------------------------------------------------------------------*/
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FDK_SACENC_ERROR fdk_sacenc_delay_Close(HANDLE_DELAY *phDelay) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == phDelay) {
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error = SACENC_INVALID_HANDLE;
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} else {
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if (NULL != *phDelay) {
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FDK_FREE_MEMORY_1D(*phDelay);
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}
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}
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return error;
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_Init(HANDLE_DELAY hDelay, const INT nQmfLen,
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const INT nFrameLen,
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const INT nCoreCoderDelay,
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const INT nSacStreamMuxDelay) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == hDelay) {
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error = SACENC_INVALID_HANDLE;
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} else {
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/* Fill structure before calculation */
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FDKmemclear(&hDelay->config, sizeof(hDelay->config));
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hDelay->config.nQmfLen = nQmfLen;
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hDelay->config.nFrameLen = nFrameLen;
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hDelay->config.nCoreCoderDelay = nCoreCoderDelay;
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hDelay->config.nSacStreamMuxDelay = nSacStreamMuxDelay;
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}
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return error;
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}
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/*-----------------------------------------------------------------------------
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functionname: fdk_sacenc_delay_SubCalulateBufferDelays()
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description: Calculates the Delays of the buffers
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returns: Error Code
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-----------------------------------------------------------------------------*/
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FDK_SACENC_ERROR fdk_sacenc_delay_SubCalulateBufferDelays(HANDLE_DELAY hDel) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == hDel) {
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error = SACENC_INVALID_HANDLE;
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} else {
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int nEncoderAnDelay, nEncoderSynDelay, nEncoderWinDelay, nDecoderAnDelay,
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nDecoderSynDelay, nResidualCoderFrameDelay,
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nArbDmxResidualCoderFrameDelay;
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if (hDel->config.bSacTimeAlignmentDynamicOut > 0) {
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hDel->config.nSacTimeAlignment = 0;
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}
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{
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nEncoderAnDelay =
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2 * hDel->config.nQmfLen +
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hDel->config.nQmfLen / 2; /* Only Ld-QMF Delay, no hybrid */
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nEncoderSynDelay = 1 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2;
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nDecoderAnDelay = 2 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2;
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nDecoderSynDelay = 1 * hDel->config.nQmfLen + hDel->config.nQmfLen / 2;
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nEncoderWinDelay =
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hDel->config.nFrameLen / 2; /* WindowLookahead is just half a frame */
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}
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{ nResidualCoderFrameDelay = 0; }
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{ nArbDmxResidualCoderFrameDelay = 0; }
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/* Calculate variable Buffer-Delays */
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if (hDel->config.bTimeDomDmx == 0) {
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/* ArbitraryDmx and TdDmx off */
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int tempDelay;
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hDel->nSurroundAnalysisBuffer = 0;
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hDel->nArbDmxAnalysisBuffer = 0;
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tempDelay = nEncoderSynDelay + hDel->config.nLimiterDelay +
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hDel->config.nCoreCoderDelay +
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hDel->config.nSacTimeAlignment + nDecoderAnDelay;
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tempDelay = (nResidualCoderFrameDelay * hDel->config.nFrameLen) +
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hDel->config.nSacStreamMuxDelay - tempDelay;
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if (tempDelay > 0) {
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hDel->nBitstreamFrameBuffer = 0;
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hDel->nOutputAudioBuffer = tempDelay;
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} else {
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tempDelay = -tempDelay;
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hDel->nBitstreamFrameBuffer =
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(tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen;
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hDel->nOutputAudioBuffer =
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(hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen) - tempDelay;
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}
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hDel->nOutputAudioQmfFrameBuffer =
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(hDel->nOutputAudioBuffer + (hDel->config.nQmfLen / 2) - 1) /
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hDel->config.nQmfLen;
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if (hDel->config.bDmxAlign > 0) {
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tempDelay = nEncoderWinDelay + nEncoderAnDelay + nEncoderSynDelay +
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hDel->nOutputAudioBuffer + hDel->config.nLimiterDelay +
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hDel->config.nCoreCoderDelay;
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hDel->nDiscardOutFrames =
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(tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen;
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hDel->nDmxAlignBuffer =
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hDel->nDiscardOutFrames * hDel->config.nFrameLen - tempDelay;
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} else {
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hDel->nDiscardOutFrames = 0;
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hDel->nDmxAlignBuffer = 0;
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}
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/* Output: Info-Variables */
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hDel->nInfoDmxDelay = hDel->nSurroundAnalysisBuffer + nEncoderAnDelay +
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nEncoderWinDelay + nEncoderSynDelay +
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hDel->nOutputAudioBuffer +
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hDel->config.nLimiterDelay;
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hDel->nInfoCodecDelay =
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hDel->nInfoDmxDelay + hDel->config.nCoreCoderDelay +
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hDel->config.nSacTimeAlignment + nDecoderAnDelay + nDecoderSynDelay;
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} else {
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/* ArbitraryDmx or TdDmx on */
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int tempDelay1, tempDelay2, tempDelay12, tempDelay3;
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tempDelay1 = hDel->config.nArbDmxDelay - hDel->config.nSurroundDelay;
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if (tempDelay1 >= 0) {
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hDel->nSurroundAnalysisBuffer = tempDelay1;
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hDel->nArbDmxAnalysisBuffer = 0;
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} else {
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hDel->nSurroundAnalysisBuffer = 0;
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hDel->nArbDmxAnalysisBuffer = -tempDelay1;
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}
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tempDelay1 = nEncoderWinDelay + hDel->config.nSurroundDelay +
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hDel->nSurroundAnalysisBuffer +
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nEncoderAnDelay; /*Surround Path*/
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tempDelay2 = nEncoderWinDelay + hDel->config.nArbDmxDelay +
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hDel->nArbDmxAnalysisBuffer +
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nEncoderAnDelay; /* ArbDmx Compare Path */
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tempDelay3 = hDel->config.nArbDmxDelay + hDel->config.nLimiterDelay +
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hDel->config.nCoreCoderDelay +
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hDel->config.nSacTimeAlignment +
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nDecoderAnDelay; /* ArbDmx Passthrough*/
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tempDelay12 =
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FDKmax(nResidualCoderFrameDelay, nArbDmxResidualCoderFrameDelay) *
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hDel->config.nFrameLen;
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tempDelay12 += hDel->config.nSacStreamMuxDelay;
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if (tempDelay1 > tempDelay2) {
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tempDelay12 += tempDelay1;
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} else {
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tempDelay12 += tempDelay2;
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}
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if (tempDelay3 > tempDelay12) {
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if (hDel->config.bMinimizeDelay > 0) {
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hDel->nBitstreamFrameBuffer =
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(tempDelay3 - tempDelay12) / hDel->config.nFrameLen; /*floor*/
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hDel->nOutputAudioBuffer = 0;
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hDel->nSurroundAnalysisBuffer +=
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(tempDelay3 - tempDelay12 -
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(hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen));
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hDel->nArbDmxAnalysisBuffer +=
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(tempDelay3 - tempDelay12 -
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(hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen));
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} else {
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hDel->nBitstreamFrameBuffer =
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((tempDelay3 - tempDelay12) + hDel->config.nFrameLen - 1) /
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hDel->config.nFrameLen;
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hDel->nOutputAudioBuffer =
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hDel->nBitstreamFrameBuffer * hDel->config.nFrameLen +
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tempDelay12 - tempDelay3;
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}
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} else {
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hDel->nBitstreamFrameBuffer = 0;
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hDel->nOutputAudioBuffer = tempDelay12 - tempDelay3;
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}
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if (hDel->config.bDmxAlign > 0) {
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int tempDelay = hDel->config.nArbDmxDelay + hDel->nOutputAudioBuffer +
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hDel->config.nLimiterDelay +
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hDel->config.nCoreCoderDelay;
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hDel->nDiscardOutFrames =
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(tempDelay + hDel->config.nFrameLen - 1) / hDel->config.nFrameLen;
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hDel->nDmxAlignBuffer =
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hDel->nDiscardOutFrames * hDel->config.nFrameLen - tempDelay;
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} else {
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hDel->nDiscardOutFrames = 0;
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hDel->nDmxAlignBuffer = 0;
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}
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/* Output: Info-Variables */
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hDel->nInfoDmxDelay = hDel->config.nArbDmxDelay +
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hDel->nOutputAudioBuffer +
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hDel->config.nLimiterDelay;
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hDel->nInfoCodecDelay =
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hDel->nInfoDmxDelay + hDel->config.nCoreCoderDelay +
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hDel->config.nSacTimeAlignment + nDecoderAnDelay + nDecoderSynDelay;
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hDel->nInfoDecoderDelay = nDecoderAnDelay + nDecoderSynDelay;
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} /* ArbitraryDmx or TdDmx on */
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/* Additonal Variables needed for Computation Issues */
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hDel->nBitstreamFrameBufferSize = hDel->nBitstreamFrameBuffer + 1;
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}
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return error;
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}
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static FDK_SACENC_ERROR assignParameterInRange(
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const INT startRange, /* including startRange */
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const INT stopRange, /* including stopRange */
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const INT value, /* value to write*/
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INT *const ptr /* destination pointer*/
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) {
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FDK_SACENC_ERROR error = SACENC_INVALID_CONFIG;
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if ((startRange <= value) && (value <= stopRange)) {
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*ptr = value;
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error = SACENC_OK;
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}
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return error;
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_SetDmxAlign(HANDLE_DELAY hDelay,
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const INT bDmxAlignIn) {
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return (assignParameterInRange(0, 1, bDmxAlignIn, &hDelay->config.bDmxAlign));
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_SetTimeDomDmx(HANDLE_DELAY hDelay,
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const INT bTimeDomDmxIn) {
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return (
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assignParameterInRange(0, 1, bTimeDomDmxIn, &hDelay->config.bTimeDomDmx));
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_SetSacTimeAlignmentDynamicOut(
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HANDLE_DELAY hDelay, const INT bSacTimeAlignmentDynamicOutIn) {
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return (assignParameterInRange(0, 1, bSacTimeAlignmentDynamicOutIn,
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&hDelay->config.bSacTimeAlignmentDynamicOut));
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_SetNSacTimeAlignment(
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HANDLE_DELAY hDelay, const INT nSacTimeAlignmentIn) {
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return (assignParameterInRange(-32768, 32767, nSacTimeAlignmentIn,
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&hDelay->config.nSacTimeAlignment));
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}
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FDK_SACENC_ERROR fdk_sacenc_delay_SetMinimizeDelay(HANDLE_DELAY hDelay,
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const INT bMinimizeDelay) {
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return (assignParameterInRange(0, 1, bMinimizeDelay,
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&hDelay->config.bMinimizeDelay));
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}
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INT fdk_sacenc_delay_GetOutputAudioBufferDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nOutputAudioBuffer);
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}
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INT fdk_sacenc_delay_GetSurroundAnalysisBufferDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nSurroundAnalysisBuffer);
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}
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INT fdk_sacenc_delay_GetArbDmxAnalysisBufferDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nArbDmxAnalysisBuffer);
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}
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INT fdk_sacenc_delay_GetBitstreamFrameBufferSize(HANDLE_DELAY hDelay) {
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return (hDelay->nBitstreamFrameBufferSize);
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}
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INT fdk_sacenc_delay_GetDmxAlignBufferDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nDmxAlignBuffer);
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}
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INT fdk_sacenc_delay_GetDiscardOutFrames(HANDLE_DELAY hDelay) {
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return (hDelay->nDiscardOutFrames);
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}
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INT fdk_sacenc_delay_GetInfoDmxDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nInfoDmxDelay);
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}
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INT fdk_sacenc_delay_GetInfoCodecDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nInfoCodecDelay);
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}
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INT fdk_sacenc_delay_GetInfoDecoderDelay(HANDLE_DELAY hDelay) {
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return (hDelay->nInfoDecoderDelay);
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}
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