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Diffstat (limited to 'media/libstagefright/codecs/amrwb/src/dtx.h')
| -rw-r--r-- | media/libstagefright/codecs/amrwb/src/dtx.h | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrwb/src/dtx.h b/media/libstagefright/codecs/amrwb/src/dtx.h new file mode 100644 index 0000000..a81f089 --- /dev/null +++ b/media/libstagefright/codecs/amrwb/src/dtx.h @@ -0,0 +1,242 @@ +/* ------------------------------------------------------------------ + * 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 */ + + |