569 lines
20 KiB
C++
569 lines
20 KiB
C++
/* -----------------------------------------------------------------------------
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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): Max Neuendorf
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Description: Encoder Library Interface
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Get windows for framing
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*******************************************************************************/
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/**************************************************************************/ /**
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\file
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Description of file contents
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******************************************************************************/
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/* Includes ******************************************************************/
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#include "sacenc_framewindowing.h"
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#include "sacenc_vectorfunctions.h"
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/* Defines *******************************************************************/
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/* Data Types ****************************************************************/
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typedef struct T_FRAMEWINDOW {
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INT nTimeSlotsMax;
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INT bFrameKeep;
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INT startSlope;
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INT stopSlope;
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INT startRect;
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INT stopRect;
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INT taperAnaLen;
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INT taperSynLen;
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FIXP_WIN pTaperAna__FDK[MAX_TIME_SLOTS];
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FIXP_WIN pTaperSyn__FDK[MAX_TIME_SLOTS];
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} FRAMEWINDOW;
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typedef enum {
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FIX_INVALID = -1,
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FIX_RECT_SMOOTH = 0,
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FIX_SMOOTH_RECT = 1,
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FIX_LARGE_SMOOTH = 2,
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FIX_RECT_TRIANG = 3
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} FIX_TYPE;
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typedef enum {
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VAR_INVALID = -1,
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VAR_HOLD = 0,
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VAR_ISOLATE = 1
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} VAR_TYPE;
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/* Constants *****************************************************************/
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/* Function / Class Declarations *********************************************/
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/* Function / Class Definition ***********************************************/
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static void calcTaperWin(FIXP_WIN *pTaperWin, INT timeSlots) {
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FIXP_DBL x;
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int i, scale;
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for (i = 0; i < timeSlots; i++) {
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x = fDivNormHighPrec((FIXP_DBL)i, (FIXP_DBL)timeSlots, &scale);
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if (scale < 0) {
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pTaperWin[i] = FX_DBL2FX_WIN(x >> (-scale));
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} else {
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pTaperWin[i] = FX_DBL2FX_WIN(x << (scale));
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}
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}
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pTaperWin[timeSlots] = FX_DBL2FX_WIN((FIXP_DBL)MAXVAL_DBL);
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}
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FDK_SACENC_ERROR fdk_sacenc_frameWindow_Create(
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HANDLE_FRAMEWINDOW *phFrameWindow) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == phFrameWindow) {
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error = SACENC_INVALID_HANDLE;
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} else {
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/* Memory Allocation */
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FDK_ALLOCATE_MEMORY_1D(*phFrameWindow, 1, FRAMEWINDOW);
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}
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return error;
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bail:
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fdk_sacenc_frameWindow_Destroy(phFrameWindow);
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return ((SACENC_OK == error) ? SACENC_MEMORY_ERROR : error);
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}
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FDK_SACENC_ERROR fdk_sacenc_frameWindow_Init(
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HANDLE_FRAMEWINDOW hFrameWindow,
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const FRAMEWINDOW_CONFIG *const pFrameWindowConfig) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if ((hFrameWindow == NULL) || (pFrameWindowConfig == NULL)) {
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error = SACENC_INVALID_HANDLE;
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} else if (pFrameWindowConfig->nTimeSlotsMax < 0) {
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error = SACENC_INIT_ERROR;
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} else {
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int ts;
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hFrameWindow->bFrameKeep = pFrameWindowConfig->bFrameKeep;
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hFrameWindow->nTimeSlotsMax = pFrameWindowConfig->nTimeSlotsMax;
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FIXP_WIN winMaxVal = FX_DBL2FX_WIN((FIXP_DBL)MAXVAL_DBL);
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int timeSlots = pFrameWindowConfig->nTimeSlotsMax;
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{
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hFrameWindow->startSlope = 0;
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hFrameWindow->stopSlope = ((3 * timeSlots) >> 1) - 1;
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hFrameWindow->startRect = timeSlots >> 1;
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hFrameWindow->stopRect = timeSlots;
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calcTaperWin(hFrameWindow->pTaperSyn__FDK, timeSlots >> 1);
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hFrameWindow->taperSynLen = timeSlots >> 1;
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}
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/* Calculate Taper for non-rect. ana. windows */
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hFrameWindow->taperAnaLen =
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hFrameWindow->startRect - hFrameWindow->startSlope;
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for (ts = 0; ts < hFrameWindow->taperAnaLen; ts++) {
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{ hFrameWindow->pTaperAna__FDK[ts] = winMaxVal; }
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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_frameWindow_Destroy(
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HANDLE_FRAMEWINDOW *phFrameWindow) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if ((NULL != phFrameWindow) && (NULL != *phFrameWindow)) {
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FDKfree(*phFrameWindow);
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*phFrameWindow = NULL;
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}
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return error;
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}
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static FDK_SACENC_ERROR FrameWinList_Reset(FRAMEWIN_LIST *const pFrameWinList) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == pFrameWinList) {
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error = SACENC_INVALID_HANDLE;
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} else {
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int k = 0;
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for (k = 0; k < MAX_NUM_PARAMS; k++) {
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pFrameWinList->dat[k].slot = -1;
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pFrameWinList->dat[k].hold = FW_INTP;
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}
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pFrameWinList->n = 0;
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}
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return error;
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}
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static FDK_SACENC_ERROR FrameWindowList_Add(FRAMEWIN_LIST *const pFrameWinList,
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const INT slot,
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const FW_SLOTTYPE hold) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == pFrameWinList) {
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error = SACENC_INVALID_HANDLE;
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} else {
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if (pFrameWinList->n >= MAX_NUM_PARAMS) { /* Place left in List ?*/
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error = SACENC_PARAM_ERROR;
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} else if (pFrameWinList->n > 0 &&
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pFrameWinList->dat[pFrameWinList->n - 1].slot - slot > 0) {
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error = SACENC_PARAM_ERROR;
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} else {
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pFrameWinList->dat[pFrameWinList->n].slot = slot;
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pFrameWinList->dat[pFrameWinList->n].hold = hold;
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pFrameWinList->n++;
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}
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}
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return error;
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}
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static FDK_SACENC_ERROR FrameWindowList_Remove(
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FRAMEWIN_LIST *const pFrameWinList, const INT idx) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == pFrameWinList) {
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error = SACENC_INVALID_HANDLE;
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} else {
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int k = 0;
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if (idx < 0 || idx >= MAX_NUM_PARAMS) {
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error = SACENC_PARAM_ERROR;
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} else if (pFrameWinList->n > 0) {
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if (idx == MAX_NUM_PARAMS - 1) {
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pFrameWinList->dat[idx].slot = -1;
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pFrameWinList->dat[idx].hold = FW_INTP;
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} else {
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for (k = idx; k < MAX_NUM_PARAMS - 1; k++) {
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pFrameWinList->dat[k] = pFrameWinList->dat[k + 1];
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}
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}
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pFrameWinList->n--;
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}
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}
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return error;
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}
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static FDK_SACENC_ERROR FrameWindowList_Limit(
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FRAMEWIN_LIST *const pFrameWinList, const INT ll /*lower limit*/,
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const INT ul /*upper limit*/
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) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if (NULL == pFrameWinList) {
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error = SACENC_INVALID_HANDLE;
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} else {
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int k = 0;
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for (k = 0; k < pFrameWinList->n; k++) {
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if (pFrameWinList->dat[k].slot < ll || pFrameWinList->dat[k].slot > ul) {
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FrameWindowList_Remove(pFrameWinList, k);
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--k;
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}
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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_frameWindow_GetWindow(
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HANDLE_FRAMEWINDOW hFrameWindow, INT tr_pos[MAX_NUM_PARAMS],
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const INT timeSlots, FRAMINGINFO *const pFramingInfo,
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FIXP_WIN *pWindowAna__FDK[MAX_NUM_PARAMS],
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FRAMEWIN_LIST *const pFrameWinList, const INT avoid_keep) {
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FDK_SACENC_ERROR error = SACENC_OK;
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if ((hFrameWindow == NULL) || (tr_pos == NULL) || (pFramingInfo == NULL) ||
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(pFrameWinList == NULL) || (pWindowAna__FDK == NULL)) {
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error = SACENC_INVALID_HANDLE;
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} else {
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const VAR_TYPE varType = VAR_HOLD;
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const int tranL = 4;
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int winCnt = 0;
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int w, ps;
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int startSlope = hFrameWindow->startSlope;
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int stopSlope = hFrameWindow->stopSlope;
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int startRect = hFrameWindow->startRect;
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int stopRect = hFrameWindow->stopRect;
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int taperAnaLen = hFrameWindow->taperAnaLen;
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FIXP_WIN winMaxVal = FX_DBL2FX_WIN((FIXP_DBL)MAXVAL_DBL);
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FIXP_WIN applyRightWindowGain__FDK[MAX_NUM_PARAMS];
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FIXP_WIN *pTaperAna__FDK = hFrameWindow->pTaperAna__FDK;
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/* sanity check */
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for (ps = 0; ps < MAX_NUM_PARAMS; ps++) {
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if (pWindowAna__FDK[ps] == NULL) {
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error = SACENC_INVALID_HANDLE;
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goto bail;
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}
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}
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if ((timeSlots > hFrameWindow->nTimeSlotsMax) || (timeSlots < 0)) {
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error = SACENC_INVALID_CONFIG;
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goto bail;
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}
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/* Reset */
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if (SACENC_OK != (error = FrameWinList_Reset(pFrameWinList))) goto bail;
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FDKmemclear(applyRightWindowGain__FDK, sizeof(applyRightWindowGain__FDK));
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if (tr_pos[0] > -1) { /* Transients in first (left) half? */
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int p_l = tr_pos[0];
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winCnt = 0;
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/* Create Parameter Positions */
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switch (varType) {
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case VAR_HOLD:
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if (SACENC_OK !=
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(error = FrameWindowList_Add(pFrameWinList, p_l - 1, FW_HOLD)))
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goto bail;
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if (SACENC_OK !=
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(error = FrameWindowList_Add(pFrameWinList, p_l, FW_INTP)))
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goto bail;
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break;
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case VAR_ISOLATE:
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if (SACENC_OK !=
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(error = FrameWindowList_Add(pFrameWinList, p_l - 1, FW_HOLD)))
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goto bail;
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if (SACENC_OK !=
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(error = FrameWindowList_Add(pFrameWinList, p_l, FW_INTP)))
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goto bail;
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if (SACENC_OK != (error = FrameWindowList_Add(pFrameWinList,
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p_l + tranL, FW_HOLD)))
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goto bail;
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if (SACENC_OK != (error = FrameWindowList_Add(
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pFrameWinList, p_l + tranL + 1, FW_INTP)))
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goto bail;
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break;
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default:
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error = SACENC_INVALID_CONFIG;
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break;
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}
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/* Outside of frame? => Kick Out */
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if (SACENC_OK !=
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(error = FrameWindowList_Limit(pFrameWinList, 0, timeSlots - 1)))
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goto bail;
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|
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/* Add timeSlots as temporary border for window creation */
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if (SACENC_OK !=
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(error = FrameWindowList_Add(pFrameWinList, timeSlots - 1, FW_HOLD)))
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goto bail;
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/* Create Windows */
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for (ps = 0; ps < pFrameWinList->n - 1; ps++) {
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if (FW_HOLD != pFrameWinList->dat[ps].hold) {
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int const start = pFrameWinList->dat[ps].slot;
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int const stop = pFrameWinList->dat[ps + 1].slot;
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/* Analysis Window */
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FDKmemset_flex(pWindowAna__FDK[winCnt], FX_DBL2FX_WIN((FIXP_DBL)0),
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start);
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FDKmemset_flex(&pWindowAna__FDK[winCnt][start], winMaxVal,
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stop - start + 1);
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FDKmemset_flex(&pWindowAna__FDK[winCnt][stop + 1],
|
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FX_DBL2FX_WIN((FIXP_DBL)0), timeSlots - stop - 1);
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|
|
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applyRightWindowGain__FDK[winCnt] =
|
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pWindowAna__FDK[winCnt][timeSlots - 1];
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winCnt++;
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}
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} /* ps */
|
|
|
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/* Pop temporary frame border */
|
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if (SACENC_OK !=
|
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(error = FrameWindowList_Remove(pFrameWinList, pFrameWinList->n - 1)))
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goto bail;
|
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} else { /* No transient in left half of ana. window */
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winCnt = 0;
|
|
|
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/* Add paramter set at end of frame */
|
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if (SACENC_OK !=
|
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(error = FrameWindowList_Add(pFrameWinList, timeSlots - 1, FW_INTP)))
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goto bail;
|
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/* Analysis Window */
|
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FDKmemset_flex(pWindowAna__FDK[winCnt], FX_DBL2FX_WIN((FIXP_DBL)0),
|
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startSlope);
|
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FDKmemcpy_flex(&pWindowAna__FDK[winCnt][startSlope], 1, pTaperAna__FDK, 1,
|
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taperAnaLen);
|
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FDKmemset_flex(&pWindowAna__FDK[winCnt][startRect], winMaxVal,
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timeSlots - startRect);
|
|
|
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applyRightWindowGain__FDK[winCnt] = winMaxVal;
|
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winCnt++;
|
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} /* if (tr_pos[0] > -1) */
|
|
|
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for (w = 0; w < winCnt; w++) {
|
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if (applyRightWindowGain__FDK[w] > (FIXP_WIN)0) {
|
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if (tr_pos[1] > -1) { /* Transients in second (right) half? */
|
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int p_r = tr_pos[1];
|
|
|
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/* Analysis Window */
|
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FDKmemset_flex(&pWindowAna__FDK[w][timeSlots], winMaxVal,
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p_r - timeSlots);
|
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FDKmemset_flex(&pWindowAna__FDK[w][p_r], FX_DBL2FX_WIN((FIXP_DBL)0),
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2 * timeSlots - p_r);
|
|
|
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} else { /* No transient in right half of ana. window */
|
|
/* Analysis Window */
|
|
FDKmemset_flex(&pWindowAna__FDK[w][timeSlots], winMaxVal,
|
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stopRect - timeSlots + 1);
|
|
FDKmemcpy_flex(&pWindowAna__FDK[w][stopRect], 1,
|
|
&pTaperAna__FDK[taperAnaLen - 1], -1, taperAnaLen);
|
|
FDKmemset_flex(&pWindowAna__FDK[w][stopSlope + 1],
|
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FX_DBL2FX_WIN((FIXP_DBL)0),
|
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2 * timeSlots - stopSlope - 1);
|
|
|
|
} /* if (tr_pos[1] > -1) */
|
|
|
|
/* Weight */
|
|
if (applyRightWindowGain__FDK[w] < winMaxVal) {
|
|
int ts;
|
|
for (ts = 0; ts < timeSlots; ts++) {
|
|
pWindowAna__FDK[w][timeSlots + ts] =
|
|
FX_DBL2FX_WIN(fMult(pWindowAna__FDK[w][timeSlots + ts],
|
|
applyRightWindowGain__FDK[w]));
|
|
}
|
|
}
|
|
} /* if (applyRightWindowGain[w] > 0.0f) */
|
|
else {
|
|
/* All Zero */
|
|
FDKmemset_flex(&pWindowAna__FDK[w][timeSlots],
|
|
FX_DBL2FX_WIN((FIXP_DBL)0), timeSlots);
|
|
}
|
|
} /* loop over windows */
|
|
|
|
if (hFrameWindow->bFrameKeep == 1) {
|
|
FDKmemcpy_flex(&pWindowAna__FDK[0][2 * timeSlots], 1,
|
|
&pWindowAna__FDK[0][timeSlots], 1, timeSlots);
|
|
FDKmemcpy_flex(&pWindowAna__FDK[0][timeSlots], 1, pWindowAna__FDK[0], 1,
|
|
timeSlots);
|
|
|
|
if (avoid_keep != 0) {
|
|
FDKmemset_flex(pWindowAna__FDK[0], FX_DBL2FX_WIN((FIXP_DBL)0),
|
|
timeSlots);
|
|
} else {
|
|
FDKmemset_flex(pWindowAna__FDK[0], winMaxVal, timeSlots);
|
|
}
|
|
} /* if (hFrameWindow->bFrameKeep==1) */
|
|
|
|
/* Feed Info to Bitstream Formatter */
|
|
pFramingInfo->numParamSets = pFrameWinList->n;
|
|
pFramingInfo->bsFramingType = 1; /* variable framing */
|
|
for (ps = 0; ps < pFramingInfo->numParamSets; ps++) {
|
|
pFramingInfo->bsParamSlots[ps] = pFrameWinList->dat[ps].slot;
|
|
}
|
|
|
|
/* if there is just one param set at last slot,
|
|
use fixed framing to save some bits */
|
|
if ((pFramingInfo->numParamSets == 1) &&
|
|
(pFramingInfo->bsParamSlots[0] == timeSlots - 1)) {
|
|
pFramingInfo->bsFramingType = 0;
|
|
}
|
|
|
|
} /* valid handle */
|
|
|
|
bail:
|
|
|
|
return error;
|
|
}
|
|
|
|
FDK_SACENC_ERROR fdk_sacenc_analysisWindowing(
|
|
const INT nTimeSlots, const INT startTimeSlot,
|
|
FIXP_WIN *pFrameWindowAna__FDK, const FIXP_DPK *const *const ppDataIn__FDK,
|
|
FIXP_DPK *const *const ppDataOut__FDK, const INT nHybridBands,
|
|
const INT dim) {
|
|
FDK_SACENC_ERROR error = SACENC_OK;
|
|
|
|
if ((pFrameWindowAna__FDK == NULL) || (ppDataIn__FDK == NULL) ||
|
|
(ppDataOut__FDK == NULL)) {
|
|
error = SACENC_INVALID_HANDLE;
|
|
} else {
|
|
int i, ts;
|
|
FIXP_WIN maxVal = FX_DBL2FX_WIN((FIXP_DBL)MAXVAL_DBL);
|
|
|
|
if (dim == FW_CHANGE_DIM) {
|
|
for (ts = startTimeSlot; ts < nTimeSlots; ts++) {
|
|
FIXP_WIN win = pFrameWindowAna__FDK[ts];
|
|
if (win == maxVal) {
|
|
for (i = 0; i < nHybridBands; i++) {
|
|
ppDataOut__FDK[i][ts].v.re = ppDataIn__FDK[ts][i].v.re;
|
|
ppDataOut__FDK[i][ts].v.im = ppDataIn__FDK[ts][i].v.im;
|
|
}
|
|
} else {
|
|
for (i = 0; i < nHybridBands; i++) {
|
|
ppDataOut__FDK[i][ts].v.re = fMult(win, ppDataIn__FDK[ts][i].v.re);
|
|
ppDataOut__FDK[i][ts].v.im = fMult(win, ppDataIn__FDK[ts][i].v.im);
|
|
}
|
|
}
|
|
} /* ts */
|
|
} else {
|
|
for (ts = startTimeSlot; ts < nTimeSlots; ts++) {
|
|
FIXP_WIN win = pFrameWindowAna__FDK[ts];
|
|
if (win == maxVal) {
|
|
for (i = 0; i < nHybridBands; i++) {
|
|
ppDataOut__FDK[ts][i].v.re = ppDataIn__FDK[ts][i].v.re;
|
|
ppDataOut__FDK[ts][i].v.im = ppDataIn__FDK[ts][i].v.im;
|
|
}
|
|
} else {
|
|
for (i = 0; i < nHybridBands; i++) {
|
|
ppDataOut__FDK[ts][i].v.re = fMult(win, ppDataIn__FDK[ts][i].v.re);
|
|
ppDataOut__FDK[ts][i].v.im = fMult(win, ppDataIn__FDK[ts][i].v.im);
|
|
}
|
|
}
|
|
} /* ts */
|
|
}
|
|
}
|
|
|
|
return error;
|
|
}
|