libfaad2/drm_dec.h

   1 /*
   2 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
   3 ** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
   4 **
   5 ** This program is free software; you can redistribute it and/or modify
   6 ** it under the terms of the GNU General Public License as published by
   7 ** the Free Software Foundation; either version 2 of the License, or
   8 ** (at your option) any later version.
   9 **
  10 ** This program is distributed in the hope that it will be useful,
  11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ** GNU General Public License for more details.
  14 **
  15 ** You should have received a copy of the GNU General Public License
  16 ** along with this program; if not, write to the Free Software
  17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 **
  19 ** Any non-GPL usage of this software or parts of this software is strictly
  20 ** forbidden.
  21 **
  22 ** Commercial non-GPL licensing of this software is possible.
  23 ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
  24 **
  25 ** $Id$
  26 **/
  27
  28 #ifndef __DRM_DEC_H__
  29 #define __DRM_DEC_H__
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include "bits.h"
  36
  37 #define DRM_PARAMETRIC_STEREO    0
  38 #define DRM_NUM_SA_BANDS         8
  39 #define DRM_NUM_PAN_BANDS       20
  40 #define NUM_OF_LINKS             3
  41 #define NUM_OF_QMF_CHANNELS     64
  42 #define NUM_OF_SUBSAMPLES       30
  43 #define MAX_SA_BAND             46
  44 #define MAX_PAN_BAND            64
  45 #define MAX_DELAY                5
  46
  47 typedef struct
  48 {
  49     uint8_t drm_ps_data_available;
  50     uint8_t bs_enable_sa;
  51     uint8_t bs_enable_pan;
  52
  53     uint8_t bs_sa_dt_flag;
  54     uint8_t bs_pan_dt_flag;
  55
  56     uint8_t g_last_had_sa;
  57     uint8_t g_last_had_pan;
  58
  59     int8_t bs_sa_data[DRM_NUM_SA_BANDS];
  60     int8_t bs_pan_data[DRM_NUM_PAN_BANDS];
  61
  62     int8_t g_sa_index[DRM_NUM_SA_BANDS];
  63     int8_t g_pan_index[DRM_NUM_PAN_BANDS];
  64     int8_t g_prev_sa_index[DRM_NUM_SA_BANDS];
  65     int8_t g_prev_pan_index[DRM_NUM_PAN_BANDS];
  66
  67     int8_t sa_decode_error;
  68     int8_t pan_decode_error;
  69
  70     int8_t g_last_good_sa_index[DRM_NUM_SA_BANDS];
  71     int8_t g_last_good_pan_index[DRM_NUM_PAN_BANDS];
  72
  73     qmf_t SA[NUM_OF_SUBSAMPLES][MAX_SA_BAND];
  74
  75     complex_t d_buff[2][MAX_SA_BAND];
  76     complex_t d2_buff[NUM_OF_LINKS][MAX_DELAY][MAX_SA_BAND];
  77
  78     uint8_t delay_buf_index_ser[NUM_OF_LINKS];
  79
  80     real_t prev_nrg[MAX_SA_BAND];
  81     real_t prev_peakdiff[MAX_SA_BAND];
  82     real_t peakdecay_fast[MAX_SA_BAND];
  83 } drm_ps_info;
  84
  85
  86 uint16_t drm_ps_data(drm_ps_info *ps, bitfile *ld);
  87
  88 drm_ps_info *drm_ps_init(void);
  89 void drm_ps_free(drm_ps_info *ps);
  90
  91 uint8_t drm_ps_decode(drm_ps_info *ps, uint8_t guess, uint32_t samplerate, qmf_t X_left[38][64], qmf_t X_right[38][64]);
  92
  93 #ifdef __cplusplus
  94 }
  95 #endif
  96 #endif
  97