09d7d2b68e
* examples : refactor common code into a library * examples : refactor common SDL code into a library * make : update Makefile to use common libs * common : fix MSVC M_PI .. * addon.node : link common lib
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#pragma once
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// needs to match WHISPER_SAMPLE_RATE
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#define COMMON_SAMPLE_RATE 16000
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#include <vector>
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#include <string>
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std::string trim(const std::string & s);
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std::string replace(
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const std::string & s,
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const std::string & from,
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const std::string & to);
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// Read WAV audio file and store the PCM data into pcmf32
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// The sample rate of the audio must be equal to COMMON_SAMPLE_RATE
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// If stereo flag is set and the audio has 2 channels, the pcmf32s will contain 2 channel PCM
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bool read_wav(
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const std::string & fname,
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std::vector<float> & pcmf32,
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std::vector<std::vector<float>> & pcmf32s,
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bool stereo);
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// Apply a high-pass frequency filter to PCM audio
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// Suppresses frequencies below cutoff Hz
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void high_pass_filter(
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std::vector<float> & data,
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float cutoff,
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float sample_rate);
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// Basic voice activity detection (VAD) using audio energy adaptive threshold
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bool vad_simple(
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std::vector<float> & pcmf32,
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int sample_rate,
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int last_ms,
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float vad_thold,
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float freq_thold,
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bool verbose);
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