| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| /**************************************************************************************** |
| Portions of this file are derived from the following 3GPP standard: |
| |
| 3GPP TS 26.173 |
| ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec |
| Available from http://www.3gpp.org |
| |
| (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) |
| Permission to distribute, modify and use this file under the standard license |
| terms listed above has been obtained from the copyright holder. |
| ****************************************************************************************/ |
| /* |
| ------------------------------------------------------------------------------ |
| |
| |
| |
| Pathname: ./cpp/include/dtx.h |
| |
| Date: 01/04/2007 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| Static memory, constants and frametypes for the DTX |
| ------------------------------------------------------------------------------ |
| */ |
| #ifndef DTX_H |
| #define DTX_H |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL VARIABLES REFERENCES |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES AND SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| #define DTX_MAX_EMPTY_THRESH 50 |
| #define DTX_HIST_SIZE 8 |
| #define DTX_HIST_SIZE_MIN_ONE 7 |
| #define DTX_ELAPSED_FRAMES_THRESH (24 + 7 -1) |
| #define DTX_HANG_CONST 7 /* yields eight frames of SP HANGOVER */ |
| #define INV_MED_THRESH 14564 |
| #define ISF_GAP 128 /* 50 */ |
| #define ONE_MINUS_ISF_GAP (16384 - ISF_GAP) |
| |
| #define ISF_GAP 128 |
| #define ISF_DITH_GAP 448 |
| #define ISF_FACTOR_LOW 256 |
| #define ISF_FACTOR_STEP 2 |
| |
| #define GAIN_THR 180 |
| #define GAIN_FACTOR 75 |
| |
| typedef struct |
| { |
| int16 isf_hist[M * DTX_HIST_SIZE]; |
| int16 log_en_hist[DTX_HIST_SIZE]; |
| int16 hist_ptr; |
| int16 log_en_index; |
| int16 cng_seed; |
| |
| /* DTX handler stuff */ |
| int16 dtxHangoverCount; |
| int16 decAnaElapsedCount; |
| int32 D[28]; |
| int32 sumD[DTX_HIST_SIZE]; |
| } dtx_encState; |
| |
| #define SPEECH 0 |
| #define DTX 1 |
| #define DTX_MUTE 2 |
| |
| #define TX_SPEECH 0 |
| #define TX_SID_FIRST 1 |
| #define TX_SID_UPDATE 2 |
| #define TX_NO_DATA 3 |
| |
| #define RX_SPEECH_GOOD 0 |
| #define RX_SPEECH_PROBABLY_DEGRADED 1 |
| #define RX_SPEECH_LOST 2 |
| #define RX_SPEECH_BAD 3 |
| #define RX_SID_FIRST 4 |
| #define RX_SID_UPDATE 5 |
| #define RX_SID_BAD 6 |
| #define RX_NO_DATA 7 |
| |
| /***************************************************************************** |
| * |
| * DEFINITION OF DATA TYPES |
| *****************************************************************************/ |
| |
| typedef struct |
| { |
| int16 since_last_sid; |
| int16 true_sid_period_inv; |
| int16 log_en; |
| int16 old_log_en; |
| int16 level; |
| int16 isf[M]; |
| int16 isf_old[M]; |
| int16 cng_seed; |
| |
| int16 isf_hist[M * DTX_HIST_SIZE]; |
| int16 log_en_hist[DTX_HIST_SIZE]; |
| int16 hist_ptr; |
| |
| int16 dtxHangoverCount; |
| int16 decAnaElapsedCount; |
| |
| int16 sid_frame; |
| int16 valid_data; |
| int16 dtxHangoverAdded; |
| |
| int16 dtxGlobalState; /* contains previous state */ |
| /* updated in main decoder */ |
| |
| int16 data_updated; /* marker to know if CNI data is ever renewed */ |
| |
| int16 dither_seed; |
| int16 CN_dith; |
| |
| } dtx_decState; |
| |
| int16 dtx_enc_init(dtx_encState ** st, int16 isf_init[]); |
| int16 dtx_enc_reset(dtx_encState * st, int16 isf_init[]); |
| void dtx_enc_exit(dtx_encState ** st); |
| |
| int16 dtx_enc( |
| dtx_encState * st, /* i/o : State struct */ |
| int16 isf[M], /* o : CN ISF vector */ |
| int16 * exc2, /* o : CN excitation */ |
| int16 ** prms |
| ); |
| |
| int16 dtx_buffer( |
| dtx_encState * st, /* i/o : State struct */ |
| int16 isf_new[], /* i : isf vector */ |
| int32 enr, /* i : residual energy (in L_FRAME) */ |
| int16 codec_mode |
| ); |
| |
| void tx_dtx_handler(dtx_encState * st, /* i/o : State struct */ |
| int16 vad_flag, /* i : vad decision */ |
| int16 * usedMode /* i/o : mode changed or not */ |
| ); |
| |
| void Qisf_ns( |
| int16 * isf1, /* input : ISF in the frequency domain (0..0.5) */ |
| int16 * isf_q, /* output: quantized ISF */ |
| int16 * indice /* output: quantization indices */ |
| ); |
| |
| |
| int16 dtx_dec_amr_wb_reset(dtx_decState * st, const int16 isf_init[]); |
| |
| int16 dtx_dec_amr_wb( |
| dtx_decState * st, /* i/o : State struct */ |
| int16 * exc2, /* o : CN excitation */ |
| int16 new_state, /* i : New DTX state */ |
| int16 isf[], /* o : CN ISF vector */ |
| int16 ** prms |
| ); |
| |
| void dtx_dec_amr_wb_activity_update( |
| dtx_decState * st, |
| int16 isf[], |
| int16 exc[]); |
| |
| |
| int16 rx_amr_wb_dtx_handler( |
| dtx_decState * st, /* i/o : State struct */ |
| int16 frame_type /* i : Frame type */ |
| ); |
| |
| void Disf_ns( |
| int16 * indice, /* input: quantization indices */ |
| int16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ |
| ); |
| |
| void aver_isf_history( |
| int16 isf_old[], |
| int16 indices[], |
| int32 isf_aver[] |
| ); |
| void find_frame_indices( |
| int16 isf_old_tx[], |
| int16 indices[], |
| dtx_encState * st |
| ); |
| |
| int16 dithering_control( |
| dtx_encState * st |
| ); |
| void CN_dithering( |
| int16 isf[M], |
| int32 * L_log_en_int, |
| int16 * dither_seed |
| ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* DTX_H */ |
| |
| |
