c6abf6cd3f
Some API deprecation -- ExperimentalAgc and ExperimentalNs are gone. We're continuing to carry iSAC even though it's gone upstream, but maybe we'll want to drop that soon.
124 lines
4.0 KiB
C
124 lines
4.0 KiB
C
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* This header file includes the descriptions of the core VAD calls.
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*/
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#ifndef COMMON_AUDIO_VAD_VAD_CORE_H_
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#define COMMON_AUDIO_VAD_VAD_CORE_H_
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#include "common_audio/signal_processing/include/signal_processing_library.h"
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// TODO(https://bugs.webrtc.org/14476): When converted to C++, remove the macro.
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#if defined(__cplusplus)
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#define CONSTEXPR_INT(x) constexpr int x
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#else
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#define CONSTEXPR_INT(x) enum { x }
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#endif
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CONSTEXPR_INT(kNumChannels = 6); // Number of frequency bands (named channels).
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CONSTEXPR_INT(
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kNumGaussians = 2); // Number of Gaussians per channel in the GMM.
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CONSTEXPR_INT(kTableSize = kNumChannels * kNumGaussians);
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CONSTEXPR_INT(
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kMinEnergy = 10); // Minimum energy required to trigger audio signal.
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typedef struct VadInstT_ {
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int vad;
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int32_t downsampling_filter_states[4];
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WebRtcSpl_State48khzTo8khz state_48_to_8;
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int16_t noise_means[kTableSize];
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int16_t speech_means[kTableSize];
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int16_t noise_stds[kTableSize];
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int16_t speech_stds[kTableSize];
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// TODO(bjornv): Change to `frame_count`.
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int32_t frame_counter;
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int16_t over_hang; // Over Hang
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int16_t num_of_speech;
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// TODO(bjornv): Change to `age_vector`.
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int16_t index_vector[16 * kNumChannels];
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int16_t low_value_vector[16 * kNumChannels];
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// TODO(bjornv): Change to `median`.
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int16_t mean_value[kNumChannels];
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int16_t upper_state[5];
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int16_t lower_state[5];
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int16_t hp_filter_state[4];
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int16_t over_hang_max_1[3];
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int16_t over_hang_max_2[3];
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int16_t individual[3];
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int16_t total[3];
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int init_flag;
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} VadInstT;
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// Initializes the core VAD component. The default aggressiveness mode is
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// controlled by `kDefaultMode` in vad_core.c.
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//
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// - self [i/o] : Instance that should be initialized
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//
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// returns : 0 (OK), -1 (null pointer in or if the default mode can't be
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// set)
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int WebRtcVad_InitCore(VadInstT* self);
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/****************************************************************************
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* WebRtcVad_set_mode_core(...)
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*
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* This function changes the VAD settings
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*
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* Input:
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* - inst : VAD instance
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* - mode : Aggressiveness degree
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* 0 (High quality) - 3 (Highly aggressive)
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*
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* Output:
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* - inst : Changed instance
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int WebRtcVad_set_mode_core(VadInstT* self, int mode);
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/****************************************************************************
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* WebRtcVad_CalcVad48khz(...)
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* WebRtcVad_CalcVad32khz(...)
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* WebRtcVad_CalcVad16khz(...)
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* WebRtcVad_CalcVad8khz(...)
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*
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* Calculate probability for active speech and make VAD decision.
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*
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* Input:
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* - inst : Instance that should be initialized
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* - speech_frame : Input speech frame
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* - frame_length : Number of input samples
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*
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* Output:
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* - inst : Updated filter states etc.
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*
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* Return value : VAD decision
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* 0 - No active speech
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* 1-6 - Active speech
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*/
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int WebRtcVad_CalcVad48khz(VadInstT* inst,
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const int16_t* speech_frame,
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size_t frame_length);
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int WebRtcVad_CalcVad32khz(VadInstT* inst,
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const int16_t* speech_frame,
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size_t frame_length);
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int WebRtcVad_CalcVad16khz(VadInstT* inst,
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const int16_t* speech_frame,
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size_t frame_length);
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int WebRtcVad_CalcVad8khz(VadInstT* inst,
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const int16_t* speech_frame,
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size_t frame_length);
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#endif // COMMON_AUDIO_VAD_VAD_CORE_H_
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