1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 ------------------------------------------------------------------------------ 31 32 33 34 Filename: /audio/gsm_amr/c/include/dec_amr.h 35 36 Date: 02/06/2002 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: Update function prototype for Decoder_amr(). Include overflow 42 flag in Decode_amrState structure 43 44 Description: Replaced "int" and/or "char" with OSCL defined types. 45 46 Description: Moved _cplusplus #ifdef after Include section. 47 48 Description: 49 50 ------------------------------------------------------------------------------ 51 INCLUDE DESCRIPTION 52 53 File : dec_amr.h 54 Purpose : Speech decoder routine. 55 56 ------------------------------------------------------------------------------ 57 */ 58 59 /*---------------------------------------------------------------------------- 60 ; CONTINUE ONLY IF NOT ALREADY DEFINED 61 ----------------------------------------------------------------------------*/ 62 #ifndef DEC_AMR_H 63 #define DEC_AMR_H "$Id $" 64 65 /*---------------------------------------------------------------------------- 66 ; INCLUDES 67 ----------------------------------------------------------------------------*/ 68 #include "typedef.h" 69 #include "cnst.h" 70 #include "mode.h" 71 #include "dtx_dec.h" 72 #include "d_plsf.h" 73 #include "gc_pred.h" 74 #include "ec_gains.h" 75 #include "ph_disp.h" 76 #include "c_g_aver.h" 77 #include "bgnscd.h" 78 #include "lsp_avg.h" 79 #include "frame.h" 80 81 /*--------------------------------------------------------------------------*/ 82 #ifdef __cplusplus 83 extern "C" 84 { 85 #endif 86 87 /*---------------------------------------------------------------------------- 88 ; MACROS 89 ; Define module specific macros here 90 ----------------------------------------------------------------------------*/ 91 92 /*---------------------------------------------------------------------------- 93 ; DEFINES 94 ; Include all pre-processor statements here. 95 ----------------------------------------------------------------------------*/ 96 #define EXC_ENERGY_HIST_LEN 9 97 #define LTP_GAIN_HISTORY_LEN 9 98 /*---------------------------------------------------------------------------- 99 ; EXTERNAL VARIABLES REFERENCES 100 ; Declare variables used in this module but defined elsewhere 101 ----------------------------------------------------------------------------*/ 102 103 /*---------------------------------------------------------------------------- 104 ; SIMPLE TYPEDEF'S 105 ----------------------------------------------------------------------------*/ 106 107 /*---------------------------------------------------------------------------- 108 ; ENUMERATED TYPEDEF'S 109 ----------------------------------------------------------------------------*/ 110 111 /*---------------------------------------------------------------------------- 112 ; STRUCTURES TYPEDEF'S 113 ----------------------------------------------------------------------------*/ 114 typedef struct Decoder_amrState 115 { 116 /* Excitation vector */ 117 Word16 old_exc[L_SUBFR + PIT_MAX + L_INTERPOL]; 118 Word16 *exc; 119 120 /* Lsp (Line spectral pairs) */ 121 /* Word16 lsp[M]; */ /* Used by CN codec */ 122 Word16 lsp_old[M]; 123 124 /* Filter's memory */ 125 Word16 mem_syn[M]; 126 127 /* pitch sharpening */ 128 Word16 sharp; 129 Word16 old_T0; 130 131 /* Memories for bad frame handling */ 132 Word16 prev_bf; 133 Word16 prev_pdf; 134 Word16 state; 135 Word16 excEnergyHist[EXC_ENERGY_HIST_LEN]; 136 137 /* Variable holding received ltpLag, used in background noise and BFI */ 138 Word16 T0_lagBuff; 139 140 /* Variables for the source characteristic detector (SCD) */ 141 Word16 inBackgroundNoise; 142 Word16 voicedHangover; 143 Word16 ltpGainHistory[LTP_GAIN_HISTORY_LEN]; 144 145 Bgn_scdState background_state; 146 Word16 nodataSeed; 147 148 Cb_gain_averageState Cb_gain_averState; 149 lsp_avgState lsp_avg_st; 150 151 D_plsfState lsfState; 152 ec_gain_pitchState ec_gain_p_st; 153 ec_gain_codeState ec_gain_c_st; 154 gc_predState pred_state; 155 ph_dispState ph_disp_st; 156 dtx_decState dtxDecoderState; 157 Flag overflow; 158 } Decoder_amrState; 159 160 /*---------------------------------------------------------------------------- 161 ; GLOBAL FUNCTION DEFINITIONS 162 ; Function Prototype declaration 163 ----------------------------------------------------------------------------*/ 164 /* 165 * Function : Decoder_amr_init 166 * Purpose : Allocates initializes state memory 167 * Description : Stores pointer to filter status struct in *st. This 168 * pointer has to be passed to Decoder_amr in each call. 169 * Returns : 0 on success 170 */ 171 Word16 Decoder_amr_init(Decoder_amrState *st); 172 173 /* 174 * Function : Decoder_amr_reset 175 * Purpose : Resets state memory 176 * Returns : 0 on success 177 */ 178 Word16 Decoder_amr_reset(Decoder_amrState *st, enum Mode mode); 179 180 /* 181 * Function : Decoder_amr 182 * Purpose : Speech decoder routine. 183 * Returns : 0 184 */ 185 void Decoder_amr( 186 Decoder_amrState *st, /* i/o : State variables */ 187 enum Mode mode, /* i : AMR mode */ 188 Word16 parm[], /* i : vector of synthesis parameters 189 (PRM_SIZE) */ 190 enum RXFrameType frame_type, /* i : received frame type */ 191 Word16 synth[], /* o : synthesis speech (L_FRAME) */ 192 Word16 A_t[] /* o : decoded LP filter in 4 subframes 193 (AZ_SIZE) */ 194 ); 195 196 /*---------------------------------------------------------------------------- 197 ; END 198 ----------------------------------------------------------------------------*/ 199 #ifdef __cplusplus 200 } 201 #endif 202 203 #endif /* DEC_AMR_H_ */ 204 205 206 207
