void WebRtcAec_ProcessFrame(aec_t *aec,
const short *nearend,
const short *nearendH,
int knownDelay)
{
// For each frame the process is as follows:
// 1) If the system_delay indicates on being too small for processing a
// frame we stuff the buffer with enough data for 10 ms.
// 2) Adjust the buffer to the system delay, by moving the read pointer.
// 3) If we can't move read pointer due to buffer size limitations we
// flush/stuff the buffer.
// 4) Process as many partitions as possible.
// 5) Update the |system_delay| with respect to a full frame of FRAME_LEN
// samples. Even though we will have data left to process (we work with
// partitions) we consider updating a whole frame, since that's the
// amount of data we input and output in audio_processing.
// TODO(bjornv): Investigate how we should round the delay difference; right
// now we know that incoming |knownDelay| is underestimated when it's less
// than |aec->knownDelay|. We therefore, round (-32) in that direction. In
// the other direction, we don't have this situation, but might flush one
// partition too little. This can cause non-causality, which should be
// investigated. Maybe, allow for a non-symmetric rounding, like -16.
int move_elements = (aec->knownDelay - knownDelay - 32) / PART_LEN;
int moved_elements = 0;
// TODO(bjornv): Change the near-end buffer handling to be the same as for
// far-end, that is, with a near_pre_buf.
// Buffer the near-end frame.
WebRtc_WriteBuffer(aec->nearFrBuf, nearend, FRAME_LEN);
// For H band
if (aec->sampFreq == 32000) {
WebRtc_WriteBuffer(aec->nearFrBufH, nearendH, FRAME_LEN);
}
// 1) At most we process |aec->mult|+1 partitions in 10 ms. Make sure we
// have enough far-end data for that by stuffing the buffer if the
// |system_delay| indicates others.
if (aec->system_delay < FRAME_LEN) {
// We don't have enough data so we rewind 10 ms.
WebRtcAec_MoveFarReadPtr(aec, -(aec->mult + 1));
}
// 2) Compensate for a possible change in the system delay.
WebRtc_MoveReadPtr(aec->far_buf_windowed, move_elements);
moved_elements = WebRtc_MoveReadPtr(aec->far_buf, move_elements);
aec->knownDelay -= moved_elements * PART_LEN;
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_MoveReadPtr(aec->far_time_buf, move_elements);
#endif
// 4) Process as many blocks as possible.
while (WebRtc_available_read(aec->nearFrBuf) >= PART_LEN) {
ProcessBlock(aec);
}
// 5) Update system delay with respect to the entire frame.
aec->system_delay -= FRAME_LEN;
}
int WebRtcAec_MoveFarReadPtr(aec_t *aec, int elements) {
int elements_moved = WebRtc_MoveReadPtr(aec->far_buf_windowed, elements);
WebRtc_MoveReadPtr(aec->far_buf, elements);
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_MoveReadPtr(aec->far_time_buf, elements);
#endif
aec->system_delay -= elements_moved * PART_LEN;
return elements_moved;
}
// only buffer L band for farend
int32_t WebRtcAec_BufferFarend(void* aecInst,
const float* farend,
size_t nrOfSamples) {
Aec* aecpc = aecInst;
size_t newNrOfSamples = nrOfSamples;
float new_farend[MAX_RESAMP_LEN];
const float* farend_ptr = farend;
// Get any error caused by buffering the farend signal.
int32_t error_code = WebRtcAec_GetBufferFarendError(aecInst, farend,
nrOfSamples);
if (error_code != 0)
return error_code;
if (aecpc->skewMode == kAecTrue && aecpc->resample == kAecTrue) {
// Resample and get a new number of samples
WebRtcAec_ResampleLinear(aecpc->resampler,
farend,
nrOfSamples,
aecpc->skew,
new_farend,
&newNrOfSamples);
farend_ptr = new_farend;
}
aecpc->farend_started = 1;
WebRtcAec_SetSystemDelay(
aecpc->aec, WebRtcAec_system_delay(aecpc->aec) + (int)newNrOfSamples);
// Write the time-domain data to |far_pre_buf|.
WebRtc_WriteBuffer(aecpc->far_pre_buf, farend_ptr, newNrOfSamples);
// Transform to frequency domain if we have enough data.
while (WebRtc_available_read(aecpc->far_pre_buf) >= PART_LEN2) {
// We have enough data to pass to the FFT, hence read PART_LEN2 samples.
{
float* ptmp = NULL;
float tmp[PART_LEN2];
WebRtc_ReadBuffer(aecpc->far_pre_buf, (void**)&ptmp, tmp, PART_LEN2);
WebRtcAec_BufferFarendPartition(aecpc->aec, ptmp);
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_WriteBuffer(
WebRtcAec_far_time_buf(aecpc->aec), &ptmp[PART_LEN], 1);
#endif
}
// Rewind |far_pre_buf| PART_LEN samples for overlap before continuing.
WebRtc_MoveReadPtr(aecpc->far_pre_buf, -PART_LEN);
}
return 0;
}
size_t WebRtc_ReadBuffer(RingBuffer* self,
void** data_ptr,
void* data,
size_t element_count) {
if (self == NULL) {
return 0;
}
if (data == NULL) {
return 0;
}
{
void* buf_ptr_1 = NULL;
void* buf_ptr_2 = NULL;
size_t buf_ptr_bytes_1 = 0;
size_t buf_ptr_bytes_2 = 0;
const size_t read_count = GetBufferReadRegions(self,
element_count,
&buf_ptr_1,
&buf_ptr_bytes_1,
&buf_ptr_2,
&buf_ptr_bytes_2);
if (buf_ptr_bytes_2 > 0) {
// We have a wrap around when reading the buffer. Copy the buffer data to
// |data| and point to it.
memcpy(data, buf_ptr_1, buf_ptr_bytes_1);
memcpy(((char*) data) + buf_ptr_bytes_1, buf_ptr_2, buf_ptr_bytes_2);
buf_ptr_1 = data;
} else if (!data_ptr) {
// No wrap, but a memcpy was requested.
memcpy(data, buf_ptr_1, buf_ptr_bytes_1);
}
if (data_ptr) {
// |buf_ptr_1| == |data| in the case of a wrap.
*data_ptr = buf_ptr_1;
}
// Update read position
WebRtc_MoveReadPtr(self, (int) read_count);
return read_count;
}
}
// only buffer L band for farend
int32_t WebRtcAec_BufferFarend(void *aecInst, const int16_t *farend,
int16_t nrOfSamples)
{
aecpc_t *aecpc = aecInst;
int32_t retVal = 0;
int newNrOfSamples = (int) nrOfSamples;
short newFarend[MAX_RESAMP_LEN];
const int16_t* farend_ptr = farend;
float tmp_farend[MAX_RESAMP_LEN];
const float* farend_float = tmp_farend;
float skew;
int i = 0;
if (aecpc == NULL) {
return -1;
}
if (farend == NULL) {
aecpc->lastError = AEC_NULL_POINTER_ERROR;
return -1;
}
if (aecpc->initFlag != initCheck) {
aecpc->lastError = AEC_UNINITIALIZED_ERROR;
return -1;
}
// number of samples == 160 for SWB input
if (nrOfSamples != 80 && nrOfSamples != 160) {
aecpc->lastError = AEC_BAD_PARAMETER_ERROR;
return -1;
}
skew = aecpc->skew;
if (aecpc->skewMode == kAecTrue && aecpc->resample == kAecTrue) {
// Resample and get a new number of samples
WebRtcAec_ResampleLinear(aecpc->resampler, farend, nrOfSamples, skew,
newFarend, &newNrOfSamples);
farend_ptr = (const int16_t*) newFarend;
}
WebRtcAec_SetSystemDelay(aecpc->aec, WebRtcAec_system_delay(aecpc->aec) +
newNrOfSamples);
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_WriteBuffer(aecpc->far_pre_buf_s16, farend_ptr,
(size_t) newNrOfSamples);
#endif
// Cast to float and write the time-domain data to |far_pre_buf|.
for (i = 0; i < newNrOfSamples; i++) {
tmp_farend[i] = (float) farend_ptr[i];
}
WebRtc_WriteBuffer(aecpc->far_pre_buf, farend_float,
(size_t) newNrOfSamples);
// Transform to frequency domain if we have enough data.
while (WebRtc_available_read(aecpc->far_pre_buf) >= PART_LEN2) {
// We have enough data to pass to the FFT, hence read PART_LEN2 samples.
WebRtc_ReadBuffer(aecpc->far_pre_buf, (void**) &farend_float, tmp_farend,
PART_LEN2);
WebRtcAec_BufferFarendPartition(aecpc->aec, farend_float);
// Rewind |far_pre_buf| PART_LEN samples for overlap before continuing.
WebRtc_MoveReadPtr(aecpc->far_pre_buf, -PART_LEN);
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_ReadBuffer(aecpc->far_pre_buf_s16, (void**) &farend_ptr, newFarend,
PART_LEN2);
WebRtc_WriteBuffer(WebRtcAec_far_time_buf(aecpc->aec),
&farend_ptr[PART_LEN], 1);
WebRtc_MoveReadPtr(aecpc->far_pre_buf_s16, -PART_LEN);
#endif
}
return retVal;
}
int32_t WebRtcAec_Init(void *aecInst, int32_t sampFreq, int32_t scSampFreq)
{
aecpc_t *aecpc = aecInst;
AecConfig aecConfig;
if (aecpc == NULL) {
return -1;
}
if (sampFreq != 8000 && sampFreq != 16000 && sampFreq != 32000) {
aecpc->lastError = AEC_BAD_PARAMETER_ERROR;
return -1;
}
aecpc->sampFreq = sampFreq;
if (scSampFreq < 1 || scSampFreq > 96000) {
aecpc->lastError = AEC_BAD_PARAMETER_ERROR;
return -1;
}
aecpc->scSampFreq = scSampFreq;
// Initialize echo canceller core
if (WebRtcAec_InitAec(aecpc->aec, aecpc->sampFreq) == -1) {
aecpc->lastError = AEC_UNSPECIFIED_ERROR;
return -1;
}
if (WebRtcAec_InitResampler(aecpc->resampler, aecpc->scSampFreq) == -1) {
aecpc->lastError = AEC_UNSPECIFIED_ERROR;
return -1;
}
if (WebRtc_InitBuffer(aecpc->far_pre_buf) == -1) {
aecpc->lastError = AEC_UNSPECIFIED_ERROR;
return -1;
}
WebRtc_MoveReadPtr(aecpc->far_pre_buf, -PART_LEN); // Start overlap.
aecpc->initFlag = initCheck; // indicates that initialization has been done
if (aecpc->sampFreq == 32000) {
aecpc->splitSampFreq = 16000;
}
else {
aecpc->splitSampFreq = sampFreq;
}
aecpc->skewFrCtr = 0;
aecpc->activity = 0;
aecpc->delayCtr = 0;
aecpc->sum = 0;
aecpc->counter = 0;
aecpc->checkBuffSize = 1;
aecpc->firstVal = 0;
aecpc->ECstartup = 1;
aecpc->bufSizeStart = 0;
aecpc->checkBufSizeCtr = 0;
aecpc->filtDelay = 0;
aecpc->timeForDelayChange = 0;
aecpc->knownDelay = 0;
aecpc->lastDelayDiff = 0;
aecpc->skew = 0;
aecpc->resample = kAecFalse;
aecpc->highSkewCtr = 0;
aecpc->sampFactor = (aecpc->scSampFreq * 1.0f) / aecpc->splitSampFreq;
// Sampling frequency multiplier (SWB is processed as 160 frame size).
aecpc->rate_factor = aecpc->splitSampFreq / 8000;
// Default settings.
aecConfig.nlpMode = kAecNlpModerate;
aecConfig.skewMode = kAecFalse;
aecConfig.metricsMode = kAecFalse;
aecConfig.delay_logging = kAecFalse;
if (WebRtcAec_set_config(aecpc, aecConfig) == -1) {
aecpc->lastError = AEC_UNSPECIFIED_ERROR;
return -1;
}
#ifdef WEBRTC_AEC_DEBUG_DUMP
if (WebRtc_InitBuffer(aecpc->far_pre_buf_s16) == -1) {
aecpc->lastError = AEC_UNSPECIFIED_ERROR;
return -1;
}
WebRtc_MoveReadPtr(aecpc->far_pre_buf_s16, -PART_LEN); // Start overlap.
#endif
return 0;
}
WebRtc_Word32 WebRtcAec_Process(void *aecInst, const WebRtc_Word16 *nearend,
const WebRtc_Word16 *nearendH, WebRtc_Word16 *out, WebRtc_Word16 *outH,
WebRtc_Word16 nrOfSamples, WebRtc_Word16 msInSndCardBuf, WebRtc_Word32 skew)
{
aecpc_t *aecpc = aecInst;
WebRtc_Word32 retVal = 0;
short i;
short nBlocks10ms;
short nFrames;
// Limit resampling to doubling/halving of signal
const float minSkewEst = -0.5f;
const float maxSkewEst = 1.0f;
if (aecpc == NULL) {
return -1;
}
if (nearend == NULL) {
aecpc->lastError = AEC_NULL_POINTER_ERROR;
return -1;
}
if (out == NULL) {
aecpc->lastError = AEC_NULL_POINTER_ERROR;
return -1;
}
if (aecpc->initFlag != initCheck) {
aecpc->lastError = AEC_UNINITIALIZED_ERROR;
return -1;
}
// number of samples == 160 for SWB input
if (nrOfSamples != 80 && nrOfSamples != 160) {
aecpc->lastError = AEC_BAD_PARAMETER_ERROR;
return -1;
}
// Check for valid pointers based on sampling rate
if (aecpc->sampFreq == 32000 && nearendH == NULL) {
aecpc->lastError = AEC_NULL_POINTER_ERROR;
return -1;
}
if (msInSndCardBuf < 0) {
msInSndCardBuf = 0;
aecpc->lastError = AEC_BAD_PARAMETER_WARNING;
retVal = -1;
}
else if (msInSndCardBuf > 500) {
msInSndCardBuf = 500;
aecpc->lastError = AEC_BAD_PARAMETER_WARNING;
retVal = -1;
}
// TODO(andrew): we need to investigate if this +10 is really wanted.
msInSndCardBuf += 10;
aecpc->msInSndCardBuf = msInSndCardBuf;
if (aecpc->skewMode == kAecTrue) {
if (aecpc->skewFrCtr < 25) {
aecpc->skewFrCtr++;
}
else {
retVal = WebRtcAec_GetSkew(aecpc->resampler, skew, &aecpc->skew);
if (retVal == -1) {
aecpc->skew = 0;
aecpc->lastError = AEC_BAD_PARAMETER_WARNING;
}
aecpc->skew /= aecpc->sampFactor*nrOfSamples;
if (aecpc->skew < 1.0e-3 && aecpc->skew > -1.0e-3) {
aecpc->resample = kAecFalse;
}
else {
aecpc->resample = kAecTrue;
}
if (aecpc->skew < minSkewEst) {
aecpc->skew = minSkewEst;
}
else if (aecpc->skew > maxSkewEst) {
aecpc->skew = maxSkewEst;
}
#ifdef WEBRTC_AEC_DEBUG_DUMP
fwrite(&aecpc->skew, sizeof(aecpc->skew), 1, aecpc->skewFile);
#endif
}
}
nFrames = nrOfSamples / FRAME_LEN;
nBlocks10ms = nFrames / aecpc->aec->mult;
if (aecpc->ECstartup) {
if (nearend != out) {
// Only needed if they don't already point to the same place.
memcpy(out, nearend, sizeof(short) * nrOfSamples);
}
// The AEC is in the start up mode
// AEC is disabled until the system delay is OK
// Mechanism to ensure that the system delay is reasonably stable.
if (aecpc->checkBuffSize) {
aecpc->checkBufSizeCtr++;
// Before we fill up the far-end buffer we require the system delay
// to be stable (+/-8 ms) compared to the first value. This
// comparison is made during the following 6 consecutive 10 ms
// blocks. If it seems to be stable then we start to fill up the
// far-end buffer.
if (aecpc->counter == 0) {
aecpc->firstVal = aecpc->msInSndCardBuf;
aecpc->sum = 0;
}
if (abs(aecpc->firstVal - aecpc->msInSndCardBuf) <
WEBRTC_SPL_MAX(0.2 * aecpc->msInSndCardBuf, sampMsNb)) {
aecpc->sum += aecpc->msInSndCardBuf;
aecpc->counter++;
}
else {
aecpc->counter = 0;
}
if (aecpc->counter * nBlocks10ms >= 6) {
// The far-end buffer size is determined in partitions of
// PART_LEN samples. Use 75% of the average value of the system
// delay as buffer size to start with.
aecpc->bufSizeStart = WEBRTC_SPL_MIN((3 * aecpc->sum *
aecpc->aec->mult * 8) / (4 * aecpc->counter * PART_LEN),
kMaxBufSizeStart);
// Buffer size has now been determined.
aecpc->checkBuffSize = 0;
}
if (aecpc->checkBufSizeCtr * nBlocks10ms > 50) {
// For really bad systems, don't disable the echo canceller for
// more than 0.5 sec.
aecpc->bufSizeStart = WEBRTC_SPL_MIN((aecpc->msInSndCardBuf *
aecpc->aec->mult * 3) / 40, kMaxBufSizeStart);
aecpc->checkBuffSize = 0;
}
}
// If |checkBuffSize| changed in the if-statement above.
if (!aecpc->checkBuffSize) {
// The system delay is now reasonably stable (or has been unstable
// for too long). When the far-end buffer is filled with
// approximately the same amount of data as reported by the system
// we end the startup phase.
int overhead_elements = aecpc->aec->system_delay / PART_LEN -
aecpc->bufSizeStart;
if (overhead_elements == 0) {
// Enable the AEC
aecpc->ECstartup = 0;
} else if (overhead_elements > 0) {
// TODO(bjornv): Do we need a check on how much we actually
// moved the read pointer? It should always be possible to move
// the pointer |overhead_elements| since we have only added data
// to the buffer and no delay compensation nor AEC processing
// has been done.
WebRtcAec_MoveFarReadPtr(aecpc->aec, overhead_elements);
// Enable the AEC
aecpc->ECstartup = 0;
}
}
} else {
// AEC is enabled.
int out_elements = 0;
EstBufDelay(aecpc);
// Note that 1 frame is supported for NB and 2 frames for WB.
for (i = 0; i < nFrames; i++) {
int16_t* out_ptr = NULL;
int16_t out_tmp[FRAME_LEN];
// Call the AEC.
WebRtcAec_ProcessFrame(aecpc->aec,
&nearend[FRAME_LEN * i],
&nearendH[FRAME_LEN * i],
aecpc->knownDelay);
// TODO(bjornv): Re-structure such that we don't have to pass
// |aecpc->knownDelay| as input. Change name to something like
// |system_buffer_diff|.
// Stuff the out buffer if we have less than a frame to output.
// This should only happen for the first frame.
out_elements = (int) WebRtc_available_read(aecpc->aec->outFrBuf);
if (out_elements < FRAME_LEN) {
WebRtc_MoveReadPtr(aecpc->aec->outFrBuf,
out_elements - FRAME_LEN);
if (aecpc->sampFreq == 32000) {
WebRtc_MoveReadPtr(aecpc->aec->outFrBufH,
out_elements - FRAME_LEN);
}
}
// Obtain an output frame.
WebRtc_ReadBuffer(aecpc->aec->outFrBuf, (void**) &out_ptr,
out_tmp, FRAME_LEN);
memcpy(&out[FRAME_LEN * i], out_ptr, sizeof(int16_t) * FRAME_LEN);
// For H band
if (aecpc->sampFreq == 32000) {
WebRtc_ReadBuffer(aecpc->aec->outFrBufH, (void**) &out_ptr,
out_tmp, FRAME_LEN);
memcpy(&outH[FRAME_LEN * i], out_ptr,
sizeof(int16_t) * FRAME_LEN);
}
}
}
#ifdef WEBRTC_AEC_DEBUG_DUMP
{
int16_t far_buf_size_ms = (int16_t) (aecpc->aec->system_delay /
(sampMsNb * aecpc->aec->mult));
fwrite(&far_buf_size_ms, 2, 1, aecpc->bufFile);
fwrite(&(aecpc->knownDelay), sizeof(aecpc->knownDelay), 1, aecpc->delayFile);
}
#endif
return retVal;
}
// only buffer L band for farend
int32_t WebRtcAec_BufferFarend(void* aecInst,
const float* farend,
int16_t nrOfSamples) {
Aec* aecpc = aecInst;
int newNrOfSamples = (int)nrOfSamples;
float new_farend[MAX_RESAMP_LEN];
const float* farend_ptr = farend;
if (farend == NULL) {
aecpc->lastError = AEC_NULL_POINTER_ERROR;
return -1;
}
if (aecpc->initFlag != initCheck) {
aecpc->lastError = AEC_UNINITIALIZED_ERROR;
return -1;
}
// number of samples == 160 for SWB input
if (nrOfSamples != 80 && nrOfSamples != 160) {
aecpc->lastError = AEC_BAD_PARAMETER_ERROR;
return -1;
}
if (aecpc->skewMode == kAecTrue && aecpc->resample == kAecTrue) {
// Resample and get a new number of samples
WebRtcAec_ResampleLinear(aecpc->resampler,
farend,
nrOfSamples,
aecpc->skew,
new_farend,
&newNrOfSamples);
farend_ptr = new_farend;
}
aecpc->farend_started = 1;
WebRtcAec_SetSystemDelay(aecpc->aec,
WebRtcAec_system_delay(aecpc->aec) + newNrOfSamples);
// Write the time-domain data to |far_pre_buf|.
WebRtc_WriteBuffer(aecpc->far_pre_buf, farend_ptr, (size_t)newNrOfSamples);
// Transform to frequency domain if we have enough data.
while (WebRtc_available_read(aecpc->far_pre_buf) >= PART_LEN2) {
// We have enough data to pass to the FFT, hence read PART_LEN2 samples.
{
float* ptmp = NULL;
float tmp[PART_LEN2];
WebRtc_ReadBuffer(aecpc->far_pre_buf, (void**)&ptmp, tmp, PART_LEN2);
WebRtcAec_BufferFarendPartition(aecpc->aec, ptmp);
#ifdef WEBRTC_AEC_DEBUG_DUMP
WebRtc_WriteBuffer(
WebRtcAec_far_time_buf(aecpc->aec), &ptmp[PART_LEN], 1);
#endif
}
// Rewind |far_pre_buf| PART_LEN samples for overlap before continuing.
WebRtc_MoveReadPtr(aecpc->far_pre_buf, -PART_LEN);
}
return 0;
}
int32_t WebRtcAec_Init(void* aecInst, int32_t sampFreq, int32_t scSampFreq) {
Aec* aecpc = aecInst;
AecConfig aecConfig;
if (sampFreq != 8000 &&
sampFreq != 16000 &&
sampFreq != 32000 &&
sampFreq != 48000) {
return AEC_BAD_PARAMETER_ERROR;
}
aecpc->sampFreq = sampFreq;
if (scSampFreq < 1 || scSampFreq > 96000) {
return AEC_BAD_PARAMETER_ERROR;
}
aecpc->scSampFreq = scSampFreq;
// Initialize echo canceller core
if (WebRtcAec_InitAec(aecpc->aec, aecpc->sampFreq) == -1) {
return AEC_UNSPECIFIED_ERROR;
}
if (WebRtcAec_InitResampler(aecpc->resampler, aecpc->scSampFreq) == -1) {
return AEC_UNSPECIFIED_ERROR;
}
WebRtc_InitBuffer(aecpc->far_pre_buf);
WebRtc_MoveReadPtr(aecpc->far_pre_buf, -PART_LEN); // Start overlap.
aecpc->initFlag = initCheck; // indicates that initialization has been done
if (aecpc->sampFreq == 32000 || aecpc->sampFreq == 48000) {
aecpc->splitSampFreq = 16000;
} else {
aecpc->splitSampFreq = sampFreq;
}
aecpc->delayCtr = 0;
aecpc->sampFactor = (aecpc->scSampFreq * 1.0f) / aecpc->splitSampFreq;
// Sampling frequency multiplier (SWB is processed as 160 frame size).
aecpc->rate_factor = aecpc->splitSampFreq / 8000;
aecpc->sum = 0;
aecpc->counter = 0;
aecpc->checkBuffSize = 1;
aecpc->firstVal = 0;
// We skip the startup_phase completely (setting to 0) if DA-AEC is enabled,
// but not extended_filter mode.
aecpc->startup_phase = WebRtcAec_extended_filter_enabled(aecpc->aec) ||
!WebRtcAec_delay_agnostic_enabled(aecpc->aec);
aecpc->bufSizeStart = 0;
aecpc->checkBufSizeCtr = 0;
aecpc->msInSndCardBuf = 0;
aecpc->filtDelay = -1; // -1 indicates an initialized state.
aecpc->timeForDelayChange = 0;
aecpc->knownDelay = 0;
aecpc->lastDelayDiff = 0;
aecpc->skewFrCtr = 0;
aecpc->resample = kAecFalse;
aecpc->highSkewCtr = 0;
aecpc->skew = 0;
aecpc->farend_started = 0;
// Default settings.
aecConfig.nlpMode = kAecNlpModerate;
aecConfig.skewMode = kAecFalse;
aecConfig.metricsMode = kAecFalse;
aecConfig.delay_logging = kAecFalse;
if (WebRtcAec_set_config(aecpc, aecConfig) == -1) {
return AEC_UNSPECIFIED_ERROR;
}
return 0;
}
