www.pudn.com > AVS_M_ver10.rar > q_gn_hf.c

/* 
*********************************************************************** 
* COPYRIGHT AND WARRANTY INFORMATION 
* 
* Copyright 2007  Audio Video Coding Standard, Part ¢ú 
* 
* This software module was developed by AVS Audio sub-group 
* 
* DISCLAIMER OF WARRANTY 
* 
* These software programs are available to the users without any 
* license fee or royalty on an "as is" basis. The AVS disclaims 
* any and all warranties, whether express, implied, or statutory, 
* including any implied warranties of merchantability or of fitness 
* for a particular purpose. In no event shall the contributors or  
* the AVS be liable for any incidental, punitive, or consequential 
* damages of any kind whatsoever arising from the use of this program. 
* 
* This disclaimer of warranty extends to the user of this program 
* and user's customers, employees, agents, transferees, successors, 
* and assigns. 
* 
* The AVS does not represent or warrant that the program furnished 
* hereunder are free of infringement of any third-party patents. 
* Commercial implementations of AVS, including shareware, may be 
* subject to royalty fees to patent holders. Information regarding 
* the AVS patent policy is available from the AVS Web site at 
* http://www.avs.org.cn 
* 
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE AVS PATENT POLICY. 
************************************************************************ 
*/ 
 
/*-------------------------------------------------------------------* 
 * functions: q_gain_hf()                                            * 
 *                                                                   * 
 * Coding/Decoding of HF gain parameters with AR prediction.         * 
 *                                                                   * 
 * The gain vector is quantized using one-stage VQ with 4 elements.  * 
 *-------------------------------------------------------------------*/ 
#include  
#include  
#include "../include/amr_plus.h" 
void q_gain_hf( 
  float *gain,      /* input : gain of 4 subfr */ 
  float *gain_q,    /* output: quantized gains */ 
  int *indice       /* output: indices         */ 
) 
{ 
  int i, k; 
  float min_err, distance, gain2[Q_GN_ORDER]; 
  distance = 1.0e30f; 
  for (k=0; k