postfish/subband.h

   1 /*
   2  *
   3  *  postfish
   4  *
   5  *      Copyright (C) 2002-2005 Monty and Xiph.Org
   6  *
   7  *  Postfish is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2, or (at your option)
  10  *  any later version.
  11  *
  12  *  Postfish is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with Postfish; see the file COPYING.  If not, write to the
  19  *  Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  *
  22  */
  23
  24 #include "postfish.h"
  25
  26 typedef struct {
  27
  28   int      freq_bands;
  29   float  **ho_window;
  30
  31 } subband_window;
  32
  33 typedef struct {
  34   time_linkage out;
  35
  36   float *fftwf_forward_out;
  37   float *fftwf_backward_in;
  38   float *fftwf_forward_in;
  39   float *fftwf_backward_out;
  40   fftwf_plan fftwf_forward;
  41   fftwf_plan fftwf_backward;
  42
  43   int      qblocksize;
  44   float   *window;
  45   int      bands;
  46   float ***lap;
  47   float  **cache0;
  48   float  **cache1;
  49
  50   int      *lap_activeC;
  51   int      *lap_active0;
  52   int      *lap_active1;
  53   int      *lap_activeP;
  54
  55   int      *visibleC;
  56   int      *visible0;
  57   int      *visible1;
  58
  59   int      *effect_activeC;
  60   int      *effect_active0;
  61   int      *effect_active1;
  62   int      *effect_activeP;
  63
  64   u_int32_t mutemaskC;
  65   u_int32_t mutemask0;
  66   u_int32_t mutemask1;
  67   u_int32_t mutemaskP;
  68
  69   int      lap_samples;
  70   int      fillstate;     /* 0: uninitialized
  71                              1: partial prime
  72                              2: nominal
  73                              3: eof processed */
  74   subband_window **wP;
  75   subband_window **w0;
  76   subband_window **w1;
  77   subband_window **wC;
  78
  79 } subband_state;
  80
  81
  82
  83 extern int subband_load(subband_state *f,int bands, int qb,int ch);
  84 extern int subband_load_freqs(subband_state *f,subband_window *w,
  85                               const float *freq_list,int bands);
  86
  87 extern time_linkage *subband_read(time_linkage *in, subband_state *f,
  88                                   subband_window **w,int *visible, int *active,
  89                                   void (*workfunc)(void *),void *arg);
  90
  91 extern int subband_reset(subband_state *f);
  92
  93