Line data    Source code

       1             : /******************************************************************************
       2             : *                        ETSI TS 103 634 V1.5.1                               *
       3             : *              Low Complexity Communication Codec Plus (LC3plus)              *
       4             : *                                                                             *
       5             : * Copyright licence is solely granted through ETSI Intellectual Property      *
       6             : * Rights Policy, 3rd April 2019. No patent licence is granted by implication, *
       7             : * estoppel or otherwise.                                                      *
       8             : ******************************************************************************/
       9             : 
      10             : #include "options.h"
      11             : #include "wmc_auto.h"
      12             : #include "functions.h"
      13             : 
      14           0 : void processTdcTdac_fl(const LC3_FLOAT *synth_inp, const LC3_FLOAT *win, LC3_INT32 frame_length, LC3_INT32 la_zeroes, LC3_FLOAT *ola_mem)
      15             : {
      16             :         LC3_INT32 i, L, LD2, NZ, synth_len;
      17             :         LC3_FLOAT synth[(MAX_LEN + MDCT_MEM_LEN_MAX)], *synth1, *synth2, *ola_mem1, *ola_mem2, sz;
      18             :         const LC3_FLOAT *win1, *win2, *win3, *win4;
      19             : 
      20           0 :     assert(la_zeroes <= frame_length / 2);
      21             : 
      22           0 :     L         = frame_length;
      23           0 :     LD2       = L/2;
      24           0 :     NZ        = LD2 - la_zeroes;
      25           0 :     synth_len = 2*L - la_zeroes;
      26             : 
      27           0 :     move_float(synth, synth_inp, synth_len);
      28             : 
      29             :     /* calculate x_ov[L+la_zeroes] ... x_ov[2*L-1] */
      30           0 :     win1 = &win[L + LD2 - 1];
      31           0 :     win2 = &win[L + LD2];
      32             : 
      33           0 :     win3 = &win[LD2 - 1];
      34           0 :     win4 = &win[LD2];
      35             : 
      36           0 :     synth1 = &synth[L + LD2 - 1 - la_zeroes];
      37           0 :     synth2 = &synth[L + LD2 - la_zeroes];
      38             : 
      39           0 :     ola_mem1 = &ola_mem[LD2 - la_zeroes];
      40           0 :     ola_mem2 = &ola_mem[LD2 - la_zeroes - 1];
      41             : 
      42           0 :     for (i = 0; i < NZ; i++)
      43             :     {
      44             :         /* analysis windowing + 2N -> N */
      45           0 :         sz = *synth1 * *win1 + *synth2 * *win2;
      46             : 
      47             :         /* N -> 2N + synthesis windowing */
      48           0 :         *ola_mem1 = sz * *win3;
      49           0 :         *ola_mem2 = sz * *win4;
      50             : 
      51             :         /* pointer update */
      52           0 :         win1--;
      53           0 :         win2++;
      54           0 :         win3--;
      55           0 :         win4++;
      56           0 :         synth1--;
      57           0 :         synth2++;
      58           0 :         ola_mem1++;
      59           0 :         ola_mem2--;
      60             :     }
      61             : 
      62           0 :     for (; i < LD2; i++)
      63             :     {
      64             :         /* analysis windowing + 2N -> N */
      65           0 :         sz = *synth1 * *win1;
      66             : 
      67             :         /* N -> 2N + synthesis windowing */
      68           0 :         *ola_mem1 = sz * *win3;
      69             : 
      70             :         /* pointer update */
      71           0 :         win1--;
      72           0 :         win2++;
      73           0 :         win3--;
      74           0 :         synth1--;
      75           0 :         synth2++;
      76           0 :         ola_mem1++;
      77             :     }
      78           0 : }
      79             :