Line data    Source code

       1             : /******************************************************************************************************
       2             : 
       3             :    (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
       4             :    Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
       5             :    Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
       6             :    Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
       7             :    contributors to this repository. All Rights Reserved.
       8             : 
       9             :    This software is protected by copyright law and by international treaties.
      10             :    The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
      11             :    Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
      12             :    Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
      13             :    Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
      14             :    contributors to this repository retain full ownership rights in their respective contributions in
      15             :    the software. This notice grants no license of any kind, including but not limited to patent
      16             :    license, nor is any license granted by implication, estoppel or otherwise.
      17             : 
      18             :    Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
      19             :    contributions.
      20             : 
      21             :    This software is provided "AS IS", without any express or implied warranties. The software is in the
      22             :    development stage. It is intended exclusively for experts who have experience with such software and
      23             :    solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
      24             :    and fitness for a particular purpose are hereby disclaimed and excluded.
      25             : 
      26             :    Any dispute, controversy or claim arising under or in relation to providing this software shall be
      27             :    submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
      28             :    accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
      29             :    the United Nations Convention on Contracts on the International Sales of Goods.
      30             : 
      31             : *******************************************************************************************************/
      32             : 
      33             : /*====================================================================================
      34             :     EVS Codec 3GPP TS26.443 Nov 04, 2021. Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0
      35             :   ====================================================================================*/
      36             : 
      37             : #include <stdint.h>
      38             : #include <math.h>
      39             : #include "options.h"
      40             : #ifdef DEBUGGING
      41             : #include "debug.h"
      42             : #endif
      43             : #include "prot.h"
      44             : 
      45             : #define WMC_TOOL_SKIP
      46             : 
      47             : /*-------------------------------------------------------------------
      48             :  * ham_cos_window()
      49             :  *
      50             :  *
      51             :  *-------------------------------------------------------------------*/
      52             : 
      53       13218 : void ham_cos_window(
      54             :     float *fh,
      55             :     const int16_t n1,
      56             :     const int16_t n2 )
      57             : {
      58             :     float cc, cte;
      59             :     int16_t i;
      60             : 
      61       13218 :     cte = PI2 / (float) ( 2 * n1 - 1 );
      62       13218 :     cc = 0.0f;
      63     5437938 :     for ( i = 0; i < n1; i++ )
      64             :     {
      65     5424720 :         *fh++ = 0.54f - 0.46f * (float) cos( cc );
      66     5424720 :         cc += cte;
      67             :     }
      68             : 
      69       13218 :     cte = PI2 / (float) ( 4 * n2 - 1 );
      70       13218 :     cc = 0.0f;
      71     2004018 :     for ( i = 0; i < n2; i++ )
      72             :     {
      73     1990800 :         *fh++ = (float) cos( cc );
      74     1990800 :         cc += cte;
      75             :     }
      76             : 
      77       13218 :     return;
      78             : }
      79             : 
      80             : #undef WMC_TOOL_SKIP