| /* |
| * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| /* |
| * This file contains some DSP initialization functions, |
| * constant table definitions and other parameters. |
| * Also contains definitions of all DSP-side data structures. |
| */ |
| |
| |
| #ifndef DSP_H |
| #define DSP_H |
| |
| #include "typedefs.h" |
| |
| #include "webrtc_cng.h" |
| |
| #include "codec_db_defines.h" |
| #include "neteq_defines.h" |
| #include "neteq_statistics.h" |
| |
| #ifdef NETEQ_ATEVENT_DECODE |
| #include "dtmf_tonegen.h" |
| #endif |
| |
| |
| |
| /*****************************/ |
| /* Pre-processor definitions */ |
| /*****************************/ |
| |
| /* FSMULT is the sample rate divided by 8000 */ |
| #if defined(NETEQ_48KHZ_WIDEBAND) |
| #define FSMULT 6 |
| #elif defined(NETEQ_32KHZ_WIDEBAND) |
| #define FSMULT 4 |
| #elif defined(NETEQ_WIDEBAND) |
| #define FSMULT 2 |
| #else |
| #define FSMULT 1 |
| #endif |
| |
| /* Size of the speech buffer (or synchronization buffer). */ |
| /* 60 ms decoding + 10 ms syncbuff + 0.625ms lookahead */ |
| #define SPEECH_BUF_SIZE (565 * FSMULT) |
| |
| /* Misc definitions */ |
| #define BGN_LPC_ORDER (4 + FSMULT) /* 5, 6, 8, or 10 */ |
| #define UNVOICED_LPC_ORDER 6 |
| #define RANDVEC_NO_OF_SAMPLES 256 |
| |
| /* Number of milliseconds to remove/add during accelerate/pre-emptive expand |
| under BGNonly operation */ |
| #define DEFAULT_TIME_ADJUST 8 |
| |
| /* Number of RecOut calls without CNG/SID before re-enabling post-decode VAD */ |
| #define POST_DECODE_VAD_AUTO_ENABLE 3000 |
| |
| /* 8kHz windowing in Q15 (over 5 samples) */ |
| #define NETEQ_OVERLAP_WINMUTE_8KHZ_START 27307 |
| #define NETEQ_OVERLAP_WINMUTE_8KHZ_INC -5461 |
| #define NETEQ_OVERLAP_WINUNMUTE_8KHZ_START 5461 |
| #define NETEQ_OVERLAP_WINUNMUTE_8KHZ_INC 5461 |
| /* 16kHz windowing in Q15 (over 10 samples) */ |
| #define NETEQ_OVERLAP_WINMUTE_16KHZ_START 29789 |
| #define NETEQ_OVERLAP_WINMUTE_16KHZ_INC -2979 |
| #define NETEQ_OVERLAP_WINUNMUTE_16KHZ_START 2979 |
| #define NETEQ_OVERLAP_WINUNMUTE_16KHZ_INC 2979 |
| /* 32kHz windowing in Q15 (over 20 samples) */ |
| #define NETEQ_OVERLAP_WINMUTE_32KHZ_START 31208 |
| #define NETEQ_OVERLAP_WINMUTE_32KHZ_INC -1560 |
| #define NETEQ_OVERLAP_WINUNMUTE_32KHZ_START 1560 |
| #define NETEQ_OVERLAP_WINUNMUTE_32KHZ_INC 1560 |
| /* 48kHz windowing in Q15 (over 30 samples) */ |
| #define NETEQ_OVERLAP_WINMUTE_48KHZ_START 31711 |
| #define NETEQ_OVERLAP_WINMUTE_48KHZ_INC -1057 |
| #define NETEQ_OVERLAP_WINUNMUTE_48KHZ_START 1057 |
| #define NETEQ_OVERLAP_WINUNMUTE_48KHZ_INC 1057 |
| |
| /* Fade BGN towards zero after this many Expand calls */ |
| #define FADE_BGN_TIME 200 |
| |
| |
| /*******************/ |
| /* Constant tables */ |
| /*******************/ |
| |
| extern const WebRtc_Word16 WebRtcNetEQ_kDownsample8kHzTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_kDownsample16kHzTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_kDownsample32kHzTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_kDownsample48kHzTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_kRandnTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_kMixFractionFuncTbl[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_k1049div[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_k2097div[]; |
| extern const WebRtc_Word16 WebRtcNetEQ_k5243div[]; |
| |
| |
| |
| /************/ |
| /* Typedefs */ |
| /************/ |
| |
| enum BGNMode |
| { |
| BGN_ON, /* default "normal" behavior with eternal noise */ |
| BGN_FADE, /* noise fades to zero after some time */ |
| BGN_OFF /* background noise is always zero */ |
| }; |
| |
| #ifdef NETEQ_STEREO |
| enum MasterSlaveMode |
| { |
| NETEQ_MONO, /* stand-alone instance */ |
| NETEQ_MASTER, /* master instance in a spatial/stereo configuration */ |
| NETEQ_SLAVE /* slave instance in a spatial/stereo configuration */ |
| }; |
| |
| enum MasterSlaveExtraInfo |
| { |
| NO_INFO, /* no info to convey */ |
| ACC_FAIL, /* signal that accelerate failed */ |
| PE_EXP_FAIL, /* signal that pre-emptive expand failed */ |
| DTMF_OVERDUB, /* signal that DTMF overdub is generated */ |
| DTMF_ONLY /* signal that DTMF only is played */ |
| }; |
| #endif |
| |
| /****************************/ |
| /* DSP-side data structures */ |
| /****************************/ |
| |
| /* Background noise (BGN) instance for storing BGN parameters |
| (sub-instance of NETEQDSP_inst) */ |
| typedef struct BGNInst_t_ |
| { |
| |
| WebRtc_Word32 w32_energy; |
| WebRtc_Word32 w32_energyMax; |
| WebRtc_Word32 w32_energyUpdate; |
| WebRtc_Word32 w32_energyUpdateLow; |
| WebRtc_Word16 pw16_filterState[BGN_LPC_ORDER]; |
| WebRtc_Word16 pw16_filter[BGN_LPC_ORDER + 1]; |
| WebRtc_Word16 w16_mutefactor; |
| WebRtc_Word16 w16_scale; |
| WebRtc_Word16 w16_scaleShift; |
| WebRtc_Word16 w16_initialized; |
| enum BGNMode bgnMode; |
| |
| } BGNInst_t; |
| |
| /* Expansion instance (sub-instance of NETEQDSP_inst) */ |
| typedef struct ExpandInst_t_ |
| { |
| |
| WebRtc_Word16 w16_overlap; /* Constant, 5 for NB and 10 for WB */ |
| WebRtc_Word16 w16_consecExp; /* Number of consecutive expand calls */ |
| WebRtc_Word16 *pw16_arFilter; /* length [UNVOICED_LPC_ORDER+1] */ |
| WebRtc_Word16 *pw16_arState; /* length [UNVOICED_LPC_ORDER] */ |
| WebRtc_Word16 w16_arGain; |
| WebRtc_Word16 w16_arGainScale; |
| WebRtc_Word16 w16_vFraction; /* Q14 */ |
| WebRtc_Word16 w16_currentVFraction; /* Q14 */ |
| WebRtc_Word16 *pw16_expVecs[2]; |
| WebRtc_Word16 w16_lags[3]; |
| WebRtc_Word16 w16_maxLag; |
| WebRtc_Word16 *pw16_overlapVec; /* last samples of speech history */ |
| WebRtc_Word16 w16_lagsDirection; |
| WebRtc_Word16 w16_lagsPosition; |
| WebRtc_Word16 w16_expandMuteFactor; /* Q14 */ |
| WebRtc_Word16 w16_stopMuting; |
| WebRtc_Word16 w16_onset; |
| WebRtc_Word16 w16_muteSlope; /* Q20 */ |
| |
| } ExpandInst_t; |
| |
| #ifdef NETEQ_VAD |
| |
| /* |
| * VAD function pointer types, replicating the typedefs in webrtc_neteq_internal.h. |
| * These function pointers match the definitions of WebRtc VAD functions WebRtcVad_Init, |
| * WebRtcVad_set_mode and WebRtcVad_Process, respectively, all found in webrtc_vad.h. |
| */ |
| typedef int (*VADInitFunction)(void *VAD_inst); |
| typedef int (*VADSetmodeFunction)(void *VAD_inst, WebRtc_Word16 mode); |
| typedef WebRtc_Word16 (*VADFunction)(void *VAD_inst, WebRtc_Word16 fs, WebRtc_Word16 *frame, |
| WebRtc_Word16 frameLen); |
| |
| /* Post-decode VAD instance (sub-instance of NETEQDSP_inst) */ |
| typedef struct PostDecodeVAD_t_ |
| { |
| |
| void *VADState; /* pointer to a VAD instance */ |
| |
| WebRtc_Word16 VADEnabled; /* 1 if enabled, 0 if disabled */ |
| WebRtc_Word16 VADMode; /* mode parameter to pass to the VAD function */ |
| WebRtc_Word16 VADDecision; /* 1 for active, 0 for passive */ |
| WebRtc_Word16 SIDintervalCounter; /* reset when decoding CNG/SID frame, |
| increment for each recout call */ |
| |
| /* Function pointers */ |
| VADInitFunction initFunction; /* VAD init function */ |
| VADSetmodeFunction setmodeFunction; /* VAD setmode function */ |
| VADFunction VADFunction; /* VAD function */ |
| |
| } PostDecodeVAD_t; |
| |
| #endif /* NETEQ_VAD */ |
| |
| #ifdef NETEQ_STEREO |
| #define MAX_MS_DECODES 10 |
| |
| typedef struct |
| { |
| /* Stand-alone, master, or slave */ |
| enum MasterSlaveMode msMode; |
| |
| enum MasterSlaveExtraInfo extraInfo; |
| |
| WebRtc_UWord16 instruction; |
| WebRtc_Word16 distLag; |
| WebRtc_Word16 corrLag; |
| WebRtc_Word16 bestIndex; |
| |
| WebRtc_UWord32 endTimestamp; |
| WebRtc_UWord16 samplesLeftWithOverlap; |
| |
| } MasterSlaveInfo; |
| #endif |
| |
| |
| /* "Main" NetEQ DSP instance */ |
| typedef struct DSPInst_t_ |
| { |
| |
| /* MCU/DSP Communication layer */ |
| WebRtc_Word16 *pw16_readAddress; |
| WebRtc_Word16 *pw16_writeAddress; |
| void *main_inst; |
| |
| /* Output frame size in ms and samples */ |
| WebRtc_Word16 millisecondsPerCall; |
| WebRtc_Word16 timestampsPerCall; |
| |
| /* |
| * Example of speech buffer |
| * |
| * ----------------------------------------------------------- |
| * | History T-60 to T | Future | |
| * ----------------------------------------------------------- |
| * ^ ^ |
| * | | |
| * curPosition endPosition |
| * |
| * History is gradually shifted out to the left when inserting |
| * new data at the end. |
| */ |
| |
| WebRtc_Word16 speechBuffer[SPEECH_BUF_SIZE]; /* History/future speech buffer */ |
| int curPosition; /* Next sample to play */ |
| int endPosition; /* Position that ends future data */ |
| WebRtc_UWord32 endTimestamp; /* Timestamp value at end of future data */ |
| WebRtc_UWord32 videoSyncTimestamp; /* (Estimated) timestamp of the last |
| played sample (usually same as |
| endTimestamp-(endPosition-curPosition) |
| except during Expand and CNG) */ |
| WebRtc_UWord16 fs; /* sample rate in Hz */ |
| WebRtc_Word16 w16_frameLen; /* decoder frame length in samples */ |
| WebRtc_Word16 w16_mode; /* operation used during last RecOut call */ |
| WebRtc_Word16 w16_muteFactor; /* speech mute factor in Q14 */ |
| WebRtc_Word16 *pw16_speechHistory; /* beginning of speech history during Expand */ |
| WebRtc_Word16 w16_speechHistoryLen; /* 256 for NB and 512 for WB */ |
| |
| /* random noise seed parameters */ |
| WebRtc_Word16 w16_seedInc; |
| WebRtc_UWord32 uw16_seed; |
| |
| /* VQmon related variable */ |
| WebRtc_Word16 w16_concealedTS; |
| |
| /*****************/ |
| /* Sub-instances */ |
| /*****************/ |
| |
| /* Decoder data */ |
| CodecFuncInst_t codec_ptr_inst; |
| |
| #ifdef NETEQ_CNG_CODEC |
| /* CNG "decoder" instance */ |
| CNG_dec_inst *CNG_Codec_inst; |
| #endif /* NETEQ_CNG_CODEC */ |
| |
| #ifdef NETEQ_ATEVENT_DECODE |
| /* DTMF generator instance */ |
| dtmf_tone_inst_t DTMFInst; |
| #endif /* NETEQ_CNG_CODEC */ |
| |
| #ifdef NETEQ_VAD |
| /* Post-decode VAD instance */ |
| PostDecodeVAD_t VADInst; |
| #endif /* NETEQ_VAD */ |
| |
| /* Expand instance (defined above) */ |
| ExpandInst_t ExpandInst; |
| |
| /* Background noise instance (defined above) */ |
| BGNInst_t BGNInst; |
| |
| /* Internal statistics instance */ |
| DSPStats_t statInst; |
| |
| #ifdef NETEQ_STEREO |
| /* Pointer to Master/Slave info */ |
| MasterSlaveInfo *msInfo; |
| #endif |
| |
| } DSPInst_t; |
| |
| |
| /*************************/ |
| /* Function declarations */ |
| /*************************/ |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_DSPInit(...) |
| * |
| * Initializes DSP side of NetEQ. |
| * |
| * Input: |
| * - inst : NetEq DSP instance |
| * - fs : Initial sample rate (may change when decoding data) |
| * |
| * Output: |
| * - inst : Updated instance |
| * |
| * Return value : 0 - ok |
| * : non-zero - error |
| */ |
| |
| int WebRtcNetEQ_DSPInit(DSPInst_t *inst, WebRtc_UWord16 fs); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_AddressInit(...) |
| * |
| * Initializes the shared-memory communication on the DSP side. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - data2McuAddress : Pointer to memory where DSP writes / MCU reads |
| * - data2DspAddress : Pointer to memory where MCU writes / DSP reads |
| * - mainInst : NetEQ main instance |
| * |
| * Output: |
| * - inst : Updated instance |
| * |
| * Return value : 0 - ok |
| */ |
| |
| int WebRtcNetEQ_AddressInit(DSPInst_t *inst, const void *data2McuAddress, |
| const void *data2DspAddress, const void *mainInst); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_ClearInCallStats(...) |
| * |
| * Reset in-call statistics variables on DSP side. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * |
| * Output: |
| * - inst : Updated instance |
| * |
| * Return value : 0 - ok |
| */ |
| |
| int WebRtcNetEQ_ClearInCallStats(DSPInst_t *inst); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_ClearPostCallStats(...) |
| * |
| * Reset post-call statistics variables on DSP side. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * |
| * Output: |
| * - inst : Updated instance |
| * |
| * Return value : 0 - ok |
| */ |
| |
| int WebRtcNetEQ_ClearPostCallStats(DSPInst_t *inst); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_RecOutInternal(...) |
| * |
| * This function asks NetEQ for more speech/audio data. |
| * |
| * Input: |
| * - inst : NetEQ instance, i.e. the user that requests more |
| * speech/audio data. |
| * - outdata : Pointer to a memory space where the output data |
| * should be stored. |
| * - BGNonly : If non-zero, RecOut will only produce background |
| * noise. It will still draw packets from the packet |
| * buffer, but they will never be decoded. |
| * |
| * Output: |
| * - inst : Updated user information |
| * - len : Number of samples that were outputted from NetEq |
| * |
| * Return value : 0 - Ok |
| * -1 - Error |
| */ |
| |
| int WebRtcNetEQ_RecOutInternal(DSPInst_t *inst, WebRtc_Word16 *pw16_outData, WebRtc_Word16 *pw16_len, |
| WebRtc_Word16 BGNonly); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_Normal(...) |
| * |
| * This function has the possibility to modify data that is played out in Normal |
| * mode, for example adjust the gain of the signal. The length of the signal |
| * can not be changed. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector |
| * - decoded : Pointer to vector of new data from decoder |
| * - len : Number of input samples |
| * |
| * Output: |
| * - inst : Updated user information |
| * - pw16_len : Pointer to varibale where the number of samples |
| * produced will be written |
| * |
| * Return value : >=0 - Number of samples written to outData |
| * -1 - Error |
| */ |
| |
| int WebRtcNetEQ_Normal(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| WebRtc_Word16 *pw16_decoded, WebRtc_Word16 len, |
| WebRtc_Word16 *pw16_outData, WebRtc_Word16 *pw16_len); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_Expand(...) |
| * |
| * This function produces one "chunk" of expansion data (PLC audio). The |
| * lenght of the produced audio depends on the speech history. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector |
| * - BGNonly : If non-zero, Expand will only produce background |
| * noise. |
| * - pw16_len : Desired number of samples (only for BGN mode). |
| * |
| * Output: |
| * - inst : Updated user information |
| * - outdata : Pointer to a memory space where the output data |
| * should be stored |
| * - pw16_len : Number of samples that were outputted from NetEq |
| * |
| * Return value : 0 - Ok |
| * <0 - Error |
| */ |
| |
| int WebRtcNetEQ_Expand(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| WebRtc_Word16 *pw16_outData, WebRtc_Word16 *pw16_len, |
| WebRtc_Word16 BGNonly); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_GenerateBGN(...) |
| * |
| * This function generates and writes len samples of background noise to the |
| * output vector. The Expand function will be called repeteadly until the |
| * correct number of samples is produced. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector |
| * - len : Desired length of produced BGN. |
| * |
| * |
| * Output: |
| * - pw16_outData : Pointer to a memory space where the output data |
| * should be stored |
| * |
| * Return value : >=0 - Number of noise samples produced and written |
| * to output |
| * -1 - Error |
| */ |
| |
| int WebRtcNetEQ_GenerateBGN(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| WebRtc_Word16 *pw16_outData, WebRtc_Word16 len); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_PreEmptiveExpand(...) |
| * |
| * This function tries to extend the audio data by repeating one or several |
| * pitch periods. The operation is only carried out if the correlation is |
| * strong or if the signal energy is very low. The algorithm is the |
| * reciprocal of the Accelerate algorithm. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector. |
| * - decoded : Pointer to newly decoded speech. |
| * - len : Length of decoded speech. |
| * - oldDataLen : Length of the part of decoded that has already been played out. |
| * - BGNonly : If non-zero, Pre-emptive Expand will only copy |
| * the first DEFAULT_TIME_ADJUST seconds of the |
| * input and append to the end. No signal matching is |
| * done. |
| * |
| * Output: |
| * - inst : Updated instance |
| * - outData : Pointer to a memory space where the output data |
| * should be stored. The vector must be at least |
| * min(len + 120*fs/8000, NETEQ_MAX_OUTPUT_SIZE) |
| * elements long. |
| * - pw16_len : Number of samples written to outData. |
| * |
| * Return value : 0 - Ok |
| * <0 - Error |
| */ |
| |
| int WebRtcNetEQ_PreEmptiveExpand(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| const WebRtc_Word16 *pw16_decoded, int len, int oldDataLen, |
| WebRtc_Word16 *pw16_outData, WebRtc_Word16 *pw16_len, |
| WebRtc_Word16 BGNonly); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_Accelerate(...) |
| * |
| * This function tries to shorten the audio data by removing one or several |
| * pitch periods. The operation is only carried out if the correlation is |
| * strong or if the signal energy is very low. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector. |
| * - decoded : Pointer to newly decoded speech. |
| * - len : Length of decoded speech. |
| * - BGNonly : If non-zero, Accelerate will only remove the last |
| * DEFAULT_TIME_ADJUST seconds of the intput. |
| * No signal matching is done. |
| * |
| * |
| * Output: |
| * - inst : Updated instance |
| * - outData : Pointer to a memory space where the output data |
| * should be stored |
| * - pw16_len : Number of samples written to outData. |
| * |
| * Return value : 0 - Ok |
| * <0 - Error |
| */ |
| |
| int WebRtcNetEQ_Accelerate(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| const WebRtc_Word16 *pw16_decoded, int len, |
| WebRtc_Word16 *pw16_outData, WebRtc_Word16 *pw16_len, |
| WebRtc_Word16 BGNonly); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_Merge(...) |
| * |
| * This function is used to merge new data from the decoder to the exisiting |
| * stream in the synchronization buffer. The merge operation is typically |
| * done after a packet loss, where the end of the expanded data does not |
| * fit naturally with the new decoded data. |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - scratchPtr : Pointer to scratch vector. |
| * - decoded : Pointer to new decoded speech. |
| * - len : Number of samples in pw16_decoded. |
| * |
| * |
| * Output: |
| * - inst : Updated user information |
| * - outData : Pointer to a memory space where the output data |
| * should be stored |
| * - pw16_len : Number of samples written to pw16_outData |
| * |
| * Return value : 0 - Ok |
| * <0 - Error |
| */ |
| |
| int WebRtcNetEQ_Merge(DSPInst_t *inst, |
| #ifdef SCRATCH |
| WebRtc_Word16 *pw16_scratchPtr, |
| #endif |
| WebRtc_Word16 *pw16_decoded, int len, WebRtc_Word16 *pw16_outData, |
| WebRtc_Word16 *pw16_len); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_Cng(...) |
| * |
| * This function produces CNG according to RFC 3389 |
| * |
| * Input: |
| * - inst : NetEQ DSP instance |
| * - len : Number of samples to produce |
| * |
| * Output: |
| * - pw16_outData : Output CNG |
| * |
| * Return value : 0 - Ok |
| * <0 - Error |
| */ |
| |
| #ifdef NETEQ_CNG_CODEC |
| /* Must compile NetEQ with CNG support to enable this function */ |
| |
| int WebRtcNetEQ_Cng(DSPInst_t *inst, WebRtc_Word16 *pw16_outData, int len); |
| |
| #endif /* NETEQ_CNG_CODEC */ |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_BGNUpdate(...) |
| * |
| * This function updates the background noise parameter estimates. |
| * |
| * Input: |
| * - inst : NetEQ instance, where the speech history is stored. |
| * - scratchPtr : Pointer to scratch vector. |
| * |
| * Output: |
| * - inst : Updated information about the BGN characteristics. |
| * |
| * Return value : No return value |
| */ |
| |
| void WebRtcNetEQ_BGNUpdate( |
| #ifdef SCRATCH |
| DSPInst_t *inst, WebRtc_Word16 *pw16_scratchPtr |
| #else |
| DSPInst_t *inst |
| #endif |
| ); |
| |
| #ifdef NETEQ_VAD |
| /* Functions used by post-decode VAD */ |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_InitVAD(...) |
| * |
| * Initializes post-decode VAD instance. |
| * |
| * Input: |
| * - VADinst : PostDecodeVAD instance |
| * - fs : Initial sample rate |
| * |
| * Output: |
| * - VADinst : Updated instance |
| * |
| * Return value : 0 - Ok |
| * -1 - Error |
| */ |
| |
| int WebRtcNetEQ_InitVAD(PostDecodeVAD_t *VADInst, WebRtc_UWord16 fs); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_SetVADModeInternal(...) |
| * |
| * Set the VAD mode in the VAD struct, and communicate it to the VAD instance |
| * if it exists. |
| * |
| * Input: |
| * - VADinst : PostDecodeVAD instance |
| * - mode : Mode number passed on to the VAD function |
| * |
| * Output: |
| * - VADinst : Updated instance |
| * |
| * Return value : 0 - Ok |
| * -1 - Error |
| */ |
| |
| int WebRtcNetEQ_SetVADModeInternal(PostDecodeVAD_t *VADInst, WebRtc_Word16 mode); |
| |
| #endif /* NETEQ_VAD */ |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_FlushSpeechBuffer(...) |
| * |
| * Flush the speech buffer. |
| * |
| * Input: |
| * - inst : NetEq DSP instance |
| * |
| * Output: |
| * - inst : Updated instance |
| * |
| * Return value : 0 - ok |
| * : non-zero - error |
| */ |
| |
| int WebRtcNetEQ_FlushSpeechBuffer(DSPInst_t *inst); |
| |
| #ifndef WEBRTC_NETEQ_40BITACC_TEST |
| |
| #include "signal_processing_library.h" |
| /* Map to regular SPL functions */ |
| #define WebRtcNetEQ_CrossCorr WebRtcSpl_CrossCorrelation |
| #define WebRtcNetEQ_DotW16W16 WebRtcSpl_DotProductWithScale |
| |
| #else /* WEBRTC_NETEQ_40BITACC_TEST defined */ |
| /* Run NetEQ with simulated 40-bit accumulator to run bit-exact to a DSP |
| implementation where the main (splib and NetEQ) functions have been |
| 40-bit optimized. */ |
| |
| /* Map to special 40-bit optimized functions, defined below */ |
| #define WebRtcNetEQ_CrossCorr WebRtcNetEQ_40BitAccCrossCorr |
| #define WebRtcNetEQ_DotW16W16 WebRtcNetEQ_40BitAccDotW16W16 |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_40BitAccCrossCorr(...) |
| * |
| * Calculates the Cross correlation between two sequences seq1 and seq2. Seq1 |
| * is fixed and seq2 slides as the pointer is increased with step |
| * |
| * Input: |
| * - seq1 : First sequence (fixed throughout the correlation) |
| * - seq2 : Second sequence (slided step_seq2 for each |
| * new correlation) |
| * - dimSeq : Number of samples to use in the cross correlation. |
| * Should be no larger than 1024 to avoid overflow. |
| * - dimCrossCorr : Number of CrossCorrelations to calculate (start |
| * position for seq2 is updated for each new one) |
| * - rShift : Number of right shifts to use |
| * - step_seq2 : How many (positive or negative) steps the seq2 |
| * pointer should be updated for each new cross |
| * correlation value |
| * |
| * Output: |
| * - crossCorr : The cross correlation in Q-rShift |
| */ |
| |
| void WebRtcNetEQ_40BitAccCrossCorr(WebRtc_Word32 *crossCorr, WebRtc_Word16 *seq1, |
| WebRtc_Word16 *seq2, WebRtc_Word16 dimSeq, |
| WebRtc_Word16 dimCrossCorr, WebRtc_Word16 rShift, |
| WebRtc_Word16 step_seq2); |
| |
| /**************************************************************************** |
| * WebRtcNetEQ_40BitAccDotW16W16(...) |
| * |
| * Calculates the dot product between two vectors (WebRtc_Word16) |
| * |
| * Input: |
| * - vector1 : Vector 1 |
| * - vector2 : Vector 2 |
| * - len : Number of samples in vector |
| * Should be no larger than 1024 to avoid overflow. |
| * - scaling : The number of right shifts (after multiplication) |
| * required to avoid overflow in the dot product. |
| * Return value : The dot product |
| */ |
| |
| WebRtc_Word32 WebRtcNetEQ_40BitAccDotW16W16(WebRtc_Word16 *vector1, WebRtc_Word16 *vector2, |
| int len, int scaling); |
| |
| #endif /* WEBRTC_NETEQ_40BITACC_TEST */ |
| |
| #endif /* DSP_H */ |
