116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/*
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** Copyright 2003-2010, VisualOn, Inc.
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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/*--------------------------------------------------------------------------*
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* DTX.H *
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*--------------------------------------------------------------------------*
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* Static memory, constants and frametypes for the DTX *
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*--------------------------------------------------------------------------*/
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#ifndef __DTX_H__
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#define __DTX_H__
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#define DTX_MAX_EMPTY_THRESH 50
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#define DTX_HIST_SIZE 8
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#define DTX_HIST_SIZE_MIN_ONE 7
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#define DTX_ELAPSED_FRAMES_THRESH (24 + 7 -1)
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#define DTX_HANG_CONST 7 /* yields eight frames of SP HANGOVER */
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#define INV_MED_THRESH 14564
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#define ISF_GAP 128 /* 50 */
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#define ONE_MINUS_ISF_GAP (16384 - ISF_GAP)
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#define ISF_GAP 128
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#define ISF_DITH_GAP 448
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#define ISF_FACTOR_LOW 256
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#define ISF_FACTOR_STEP 2
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#define GAIN_THR 180
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#define GAIN_FACTOR 75
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typedef struct
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{
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Word16 isf_hist[M * DTX_HIST_SIZE];
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Word16 log_en_hist[DTX_HIST_SIZE];
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Word16 hist_ptr;
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Word16 log_en_index;
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Word16 cng_seed;
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/* DTX handler stuff */
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Word16 dtxHangoverCount;
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Word16 decAnaElapsedCount;
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Word32 D[28];
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Word32 sumD[DTX_HIST_SIZE];
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} dtx_encState;
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#define SPEECH 0
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#define DTX 1
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#define DTX_MUTE 2
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#define TX_SPEECH 0
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#define TX_SID_FIRST 1
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#define TX_SID_UPDATE 2
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#define TX_NO_DATA 3
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#define RX_SPEECH_GOOD 0
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#define RX_SPEECH_PROBABLY_DEGRADED 1
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#define RX_SPEECH_LOST 2
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#define RX_SPEECH_BAD 3
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#define RX_SID_FIRST 4
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#define RX_SID_UPDATE 5
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#define RX_SID_BAD 6
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#define RX_NO_DATA 7
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/*****************************************************************************
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*
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* DEFINITION OF DATA TYPES
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*****************************************************************************/
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Word16 dtx_enc_init(dtx_encState ** st, Word16 isf_init[], VO_MEM_OPERATOR *pMemOP);
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Word16 dtx_enc_reset(dtx_encState * st, Word16 isf_init[]);
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void dtx_enc_exit(dtx_encState ** st, VO_MEM_OPERATOR *pMemOP);
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Word16 dtx_enc(
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dtx_encState * st, /* i/o : State struct */
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Word16 isf[M], /* o : CN ISF vector */
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Word16 * exc2, /* o : CN excitation */
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Word16 ** prms
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);
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Word16 dtx_buffer(
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dtx_encState * st, /* i/o : State struct */
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Word16 isf_new[], /* i : isf vector */
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Word32 enr, /* i : residual energy (in L_FRAME) */
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Word16 codec_mode
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);
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void tx_dtx_handler(dtx_encState * st, /* i/o : State struct */
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Word16 vad_flag, /* i : vad decision */
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Word16 * usedMode /* i/o : mode changed or not */
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);
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void Qisf_ns(
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Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */
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Word16 * isf_q, /* output: quantized ISF */
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Word16 * indice /* output: quantization indices */
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);
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void Disf_ns(
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Word16 * indice, /* input: quantization indices */
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Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */
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);
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#endif //__DTX_H__
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