1 /* 2 ** Copyright 2003-2010, VisualOn, Inc. 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 express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 18 /*--------------------------------------------------------------------------* 19 * DTX.H * 20 *--------------------------------------------------------------------------* 21 * Static memory, constants and frametypes for the DTX * 22 *--------------------------------------------------------------------------*/ 23 24 #ifndef __DTX_H__ 25 #define __DTX_H__ 26 27 #define DTX_MAX_EMPTY_THRESH 50 28 #define DTX_HIST_SIZE 8 29 #define DTX_HIST_SIZE_MIN_ONE 7 30 #define DTX_ELAPSED_FRAMES_THRESH (24 + 7 -1) 31 #define DTX_HANG_CONST 7 /* yields eight frames of SP HANGOVER */ 32 #define INV_MED_THRESH 14564 33 #define ISF_GAP 128 /* 50 */ 34 #define ONE_MINUS_ISF_GAP 16384 - ISF_GAP 35 #define ISF_GAP 128 36 #define ISF_DITH_GAP 448 37 #define ISF_FACTOR_LOW 256 38 #define ISF_FACTOR_STEP 2 39 #define GAIN_THR 180 40 #define GAIN_FACTOR 75 41 42 typedef struct 43 { 44 Word16 isf_hist[M * DTX_HIST_SIZE]; 45 Word16 log_en_hist[DTX_HIST_SIZE]; 46 Word16 hist_ptr; 47 Word16 log_en_index; 48 Word16 cng_seed; 49 /* DTX handler stuff */ 50 Word16 dtxHangoverCount; 51 Word16 decAnaElapsedCount; 52 Word32 D[28]; 53 Word32 sumD[DTX_HIST_SIZE]; 54 } dtx_encState; 55 56 #define SPEECH 0 57 #define DTX 1 58 #define DTX_MUTE 2 59 60 #define TX_SPEECH 0 61 #define TX_SID_FIRST 1 62 #define TX_SID_UPDATE 2 63 #define TX_NO_DATA 3 64 65 #define RX_SPEECH_GOOD 0 66 #define RX_SPEECH_PROBABLY_DEGRADED 1 67 #define RX_SPEECH_LOST 2 68 #define RX_SPEECH_BAD 3 69 #define RX_SID_FIRST 4 70 #define RX_SID_UPDATE 5 71 #define RX_SID_BAD 6 72 #define RX_NO_DATA 7 73 74 /***************************************************************************** 75 * 76 * DEFINITION OF DATA TYPES 77 *****************************************************************************/ 78 79 Word16 dtx_enc_init(dtx_encState ** st, Word16 isf_init[], VO_MEM_OPERATOR *pMemOP); 80 Word16 dtx_enc_reset(dtx_encState * st, Word16 isf_init[]); 81 void dtx_enc_exit(dtx_encState ** st, VO_MEM_OPERATOR *pMemOP); 82 83 Word16 dtx_enc( 84 dtx_encState * st, /* i/o : State struct */ 85 Word16 isf[M], /* o : CN ISF vector */ 86 Word16 * exc2, /* o : CN excitation */ 87 Word16 ** prms 88 ); 89 90 Word16 dtx_buffer( 91 dtx_encState * st, /* i/o : State struct */ 92 Word16 isf_new[], /* i : isf vector */ 93 Word32 enr, /* i : residual energy (in L_FRAME) */ 94 Word16 codec_mode 95 ); 96 97 void tx_dtx_handler(dtx_encState * st, /* i/o : State struct */ 98 Word16 vad_flag, /* i : vad decision */ 99 Word16 * usedMode /* i/o : mode changed or not */ 100 ); 101 102 void Qisf_ns( 103 Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */ 104 Word16 * isf_q, /* output: quantized ISF */ 105 Word16 * indice /* output: quantization indices */ 106 ); 107 108 109 void Disf_ns( 110 Word16 * indice, /* input: quantization indices */ 111 Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ 112 ); 113 114 #endif //__DTX_H__ 115 116
