dtx.h revision 41050cdb033641ddf26831d9272c0930f7b40a2d 
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
42typedef 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
79Word16 dtx_enc_init(dtx_encState ** st, Word16 isf_init[], VO_MEM_OPERATOR *pMemOP);
80Word16 dtx_enc_reset(dtx_encState * st, Word16 isf_init[]);
81void dtx_enc_exit(dtx_encState ** st, VO_MEM_OPERATOR *pMemOP);
82
83Word16 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
90Word16 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
97void 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
102void 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
109void 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