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Diffstat (limited to 'third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_core_internal.h')
| -rw-r--r-- | third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_core_internal.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_core_internal.h b/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_core_internal.h new file mode 100644 index 00000000..2de02837 --- /dev/null +++ b/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_core_internal.h @@ -0,0 +1,202 @@ +/* + * Copyright (c) 2013 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. + */ + +#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_ +#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_ + +#include "webrtc/common_audio/ring_buffer.h" +#include "webrtc/common_audio/wav_file.h" +#include "webrtc/modules/audio_processing/aec/aec_common.h" +#include "webrtc/modules/audio_processing/aec/aec_core.h" +#include "webrtc/typedefs.h" + +// Number of partitions for the extended filter mode. The first one is an enum +// to be used in array declarations, as it represents the maximum filter length. +enum { + kExtendedNumPartitions = 32 +}; +static const int kNormalNumPartitions = 12; + +// Delay estimator constants, used for logging and delay compensation if +// if reported delays are disabled. +enum { + kLookaheadBlocks = 15 +}; +enum { + // 500 ms for 16 kHz which is equivalent with the limit of reported delays. + kHistorySizeBlocks = 125 +}; + +// Extended filter adaptation parameters. +// TODO(ajm): No narrowband tuning yet. +static const float kExtendedMu = 0.4f; +static const float kExtendedErrorThreshold = 1.0e-6f; + +typedef struct PowerLevel { + float sfrsum; + int sfrcounter; + float framelevel; + float frsum; + int frcounter; + float minlevel; + float averagelevel; +} PowerLevel; + +struct AecCore { + int farBufWritePos, farBufReadPos; + + int knownDelay; + int inSamples, outSamples; + int delayEstCtr; + + RingBuffer* nearFrBuf; + RingBuffer* outFrBuf; + + RingBuffer* nearFrBufH[NUM_HIGH_BANDS_MAX]; + RingBuffer* outFrBufH[NUM_HIGH_BANDS_MAX]; + + float dBuf[PART_LEN2]; // nearend + float eBuf[PART_LEN2]; // error + + float dBufH[NUM_HIGH_BANDS_MAX][PART_LEN2]; // nearend + + float xPow[PART_LEN1]; + float dPow[PART_LEN1]; + float dMinPow[PART_LEN1]; + float dInitMinPow[PART_LEN1]; + float* noisePow; + + float xfBuf[2][kExtendedNumPartitions * PART_LEN1]; // farend fft buffer + float wfBuf[2][kExtendedNumPartitions * PART_LEN1]; // filter fft + complex_t sde[PART_LEN1]; // cross-psd of nearend and error + complex_t sxd[PART_LEN1]; // cross-psd of farend and nearend + // Farend windowed fft buffer. + complex_t xfwBuf[kExtendedNumPartitions * PART_LEN1]; + + float sx[PART_LEN1], sd[PART_LEN1], se[PART_LEN1]; // far, near, error psd + float hNs[PART_LEN1]; + float hNlFbMin, hNlFbLocalMin; + float hNlXdAvgMin; + int hNlNewMin, hNlMinCtr; + float overDrive, overDriveSm; + int nlp_mode; + float outBuf[PART_LEN]; + int delayIdx; + + short stNearState, echoState; + short divergeState; + + int xfBufBlockPos; + + RingBuffer* far_buf; + RingBuffer* far_buf_windowed; + int system_delay; // Current system delay buffered in AEC. + + int mult; // sampling frequency multiple + int sampFreq; + size_t num_bands; + uint32_t seed; + + float normal_mu; // stepsize + float normal_error_threshold; // error threshold + + int noiseEstCtr; + + PowerLevel farlevel; + PowerLevel nearlevel; + PowerLevel linoutlevel; + PowerLevel nlpoutlevel; + + int metricsMode; + int stateCounter; + Stats erl; + Stats erle; + Stats aNlp; + Stats rerl; + + // Quantities to control H band scaling for SWB input + int freq_avg_ic; // initial bin for averaging nlp gain + int flag_Hband_cn; // for comfort noise + float cn_scale_Hband; // scale for comfort noise in H band + + int delay_metrics_delivered; + int delay_histogram[kHistorySizeBlocks]; + int num_delay_values; + int delay_median; + int delay_std; + float fraction_poor_delays; + int delay_logging_enabled; + void* delay_estimator_farend; + void* delay_estimator; + // Variables associated with delay correction through signal based delay + // estimation feedback. + int signal_delay_correction; + int previous_delay; + int delay_correction_count; + int shift_offset; + float delay_quality_threshold; + int frame_count; + + // 0 = delay agnostic mode (signal based delay correction) disabled. + // Otherwise enabled. + int delay_agnostic_enabled; + // 1 = extended filter mode enabled, 0 = disabled. + int extended_filter_enabled; + // Runtime selection of number of filter partitions. + int num_partitions; + +#ifdef WEBRTC_AEC_DEBUG_DUMP + // Sequence number of this AEC instance, so that different instances can + // choose different dump file names. + int instance_index; + + // Number of times we've restarted dumping; used to pick new dump file names + // each time. + int debug_dump_count; + + RingBuffer* far_time_buf; + rtc_WavWriter* farFile; + rtc_WavWriter* nearFile; + rtc_WavWriter* outFile; + rtc_WavWriter* outLinearFile; + FILE* e_fft_file; +#endif +}; + +typedef void (*WebRtcAecFilterFar)(AecCore* aec, float yf[2][PART_LEN1]); +extern WebRtcAecFilterFar WebRtcAec_FilterFar; +typedef void (*WebRtcAecScaleErrorSignal)(AecCore* aec, float ef[2][PART_LEN1]); +extern WebRtcAecScaleErrorSignal WebRtcAec_ScaleErrorSignal; +typedef void (*WebRtcAecFilterAdaptation)(AecCore* aec, + float* fft, + float ef[2][PART_LEN1]); +extern WebRtcAecFilterAdaptation WebRtcAec_FilterAdaptation; +typedef void (*WebRtcAecOverdriveAndSuppress)(AecCore* aec, + float hNl[PART_LEN1], + const float hNlFb, + float efw[2][PART_LEN1]); +extern WebRtcAecOverdriveAndSuppress WebRtcAec_OverdriveAndSuppress; + +typedef void (*WebRtcAecComfortNoise)(AecCore* aec, + float efw[2][PART_LEN1], + complex_t* comfortNoiseHband, + const float* noisePow, + const float* lambda); +extern WebRtcAecComfortNoise WebRtcAec_ComfortNoise; + +typedef void (*WebRtcAecSubBandCoherence)(AecCore* aec, + float efw[2][PART_LEN1], + float xfw[2][PART_LEN1], + float* fft, + float* cohde, + float* cohxd); +extern WebRtcAecSubBandCoherence WebRtcAec_SubbandCoherence; + +#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_ |