75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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/*
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Demonstrates how to capture data from a microphone using the low-level API.
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This example simply captures data from your default microphone until you press Enter. The output is saved to the file
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specified on the command line.
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Capturing works in a very similar way to playback. The only difference is the direction of data movement. Instead of
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the application sending data to the device, the device will send data to the application. This example just writes the
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data received by the microphone straight to a WAV file.
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*/
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#define MINIAUDIO_IMPLEMENTATION
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#include "../miniaudio.h"
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#include <stdlib.h>
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#include <stdio.h>
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void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
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{
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ma_encoder* pEncoder = (ma_encoder*)pDevice->pUserData;
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MA_ASSERT(pEncoder != NULL);
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ma_encoder_write_pcm_frames(pEncoder, pInput, frameCount, NULL);
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(void)pOutput;
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}
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int main(int argc, char** argv)
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{
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ma_result result;
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ma_encoder_config encoderConfig;
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ma_encoder encoder;
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ma_device_config deviceConfig;
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ma_device device;
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if (argc < 2) {
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printf("No output file.\n");
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return -1;
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}
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encoderConfig = ma_encoder_config_init(ma_encoding_format_wav, ma_format_f32, 2, 44100);
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if (ma_encoder_init_file(argv[1], &encoderConfig, &encoder) != MA_SUCCESS) {
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printf("Failed to initialize output file.\n");
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return -1;
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}
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deviceConfig = ma_device_config_init(ma_device_type_capture);
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deviceConfig.capture.format = encoder.config.format;
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deviceConfig.capture.channels = encoder.config.channels;
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deviceConfig.sampleRate = encoder.config.sampleRate;
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deviceConfig.dataCallback = data_callback;
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deviceConfig.pUserData = &encoder;
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result = ma_device_init(NULL, &deviceConfig, &device);
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if (result != MA_SUCCESS) {
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printf("Failed to initialize capture device.\n");
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return -2;
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}
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result = ma_device_start(&device);
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if (result != MA_SUCCESS) {
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ma_device_uninit(&device);
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printf("Failed to start device.\n");
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return -3;
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}
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printf("Press Enter to stop recording...\n");
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getchar();
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ma_device_uninit(&device);
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ma_encoder_uninit(&encoder);
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return 0;
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}
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