ExternalVendorCode/whisper.cpp
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examples : move wav_writer from stream.cpp to common.h (#1317)

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* Allocate class on the stack instead of on the heap

* Add class wav_writer

* fix some minor issues

* fix some minor issues

* remove potential misleading API
This commit is contained in:
bobqianic
2023-10-03 20:56:11 +01:00
committed by GitHub
parent 4037705531
commit 08fa34882f
2 changed files with 105 additions and 57 deletions
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62
examples/stream/stream.cpp
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@ -2,7 +2,6 @@
//
// A very quick-n-dirty implementation serving mainly as a proof of concept.
//
#include <fstream>
#include "common-sdl.h"
#include "common.h"
#include "whisper.h"
@ -13,60 +12,8 @@
#include <thread>
#include <vector>
#include <fstream>
#include <ctime>
class SimpleWavWriter {
private:
std::ofstream file;
int32_t dataSize = 0;
public:
SimpleWavWriter(const std::string &filename, int sampleRate, int bitsPerSample, int channels) {
file.open(filename, std::ios::binary);
file.write("RIFF", 4);
file.write("\0\0\0\0", 4); // Placeholder for file size
file.write("WAVE", 4);
file.write("fmt ", 4);
int32_t subChunkSize = 16;
int16_t audioFormat = 1; // PCM format
int32_t byteRate = sampleRate * channels * bitsPerSample / 8;
int16_t blockAlign = channels * bitsPerSample / 8;
file.write(reinterpret_cast<char *>(&subChunkSize), 4);
file.write(reinterpret_cast<char *>(&audioFormat), 2);
file.write(reinterpret_cast<char *>(&channels), 2);
file.write(reinterpret_cast<char *>(&sampleRate), 4);
file.write(reinterpret_cast<char *>(&byteRate), 4);
file.write(reinterpret_cast<char *>(&blockAlign), 2);
file.write(reinterpret_cast<char *>(&bitsPerSample), 2);
file.write("data", 4);
file.write("\0\0\0\0", 4); // Placeholder for data size
}
void writeData(const float *data, size_t length) {
for (size_t i = 0; i < length; ++i) {
int16_t intSample = static_cast<int16_t>(data[i] * 32767);
file.write(reinterpret_cast<char *>(&intSample), sizeof(int16_t));
dataSize += sizeof(int16_t);
}
if (file.is_open()) {
file.seekp(4, std::ios::beg);
int32_t fileSize = 36 + dataSize;
file.write(reinterpret_cast<char *>(&fileSize), 4);
file.seekp(40, std::ios::beg);
file.write(reinterpret_cast<char *>(&dataSize), 4);
file.seekp(0, std::ios::end);
}
}
~SimpleWavWriter() {
if (file.is_open()) {
file.close();
}
}
};
// 500 -> 00:05.000
// 6000 -> 01:00.000
std::string to_timestamp(int64_t t) {
@ -266,8 +213,9 @@ int main(int argc, char ** argv) {
return 1;
}
}
wav_writer wavWriter;
// save wav file
SimpleWavWriter *wavWriter = nullptr;
if (params.save_audio) {
// Get current date/time for filename
time_t now = time(0);
@ -275,7 +223,7 @@ int main(int argc, char ** argv) {
strftime(buffer, sizeof(buffer), "%Y%m%d%H%M%S", localtime(&now));
std::string filename = std::string(buffer) + ".wav";
wavWriter = new SimpleWavWriter(filename, WHISPER_SAMPLE_RATE, 16, 1);
wavWriter.open(filename, WHISPER_SAMPLE_RATE, 16, 1);
}
printf("[Start speaking]\n");
fflush(stdout);
@ -285,8 +233,8 @@ int main(int argc, char ** argv) {
// main audio loop
while (is_running) {
if (params.save_audio && wavWriter) {
wavWriter->writeData(pcmf32_new.data(), pcmf32_new.size());
if (params.save_audio) {
wavWriter.write(pcmf32_new.data(), pcmf32_new.size());
}
// handle Ctrl + C
is_running = sdl_poll_events();