77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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Shows one way to handle looping of a sound.
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This example uses a decoder as the data source. Decoders can be used with the `ma_data_source` API which, conveniently,
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supports looping via the `ma_data_source_read_pcm_frames()` API. To use it, all you need to do is pass a pointer to the
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decoder straight into `ma_data_source_read_pcm_frames()` and it will just work.
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*/
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#define MINIAUDIO_IMPLEMENTATION
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#include "../miniaudio.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_decoder* pDecoder = (ma_decoder*)pDevice->pUserData;
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if (pDecoder == NULL) {
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return;
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}
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/* Reading PCM frames will loop based on what we specified when called ma_data_source_set_looping(). */
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ma_data_source_read_pcm_frames(pDecoder, pOutput, frameCount, NULL);
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(void)pInput;
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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_decoder decoder;
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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 input file.\n");
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return -1;
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}
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result = ma_decoder_init_file(argv[1], NULL, &decoder);
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if (result != MA_SUCCESS) {
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return -2;
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}
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/*
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A decoder is a data source which means we just use ma_data_source_set_looping() to set the
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looping state. We will read data using ma_data_source_read_pcm_frames() in the data callback.
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*/
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ma_data_source_set_looping(&decoder, MA_TRUE);
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deviceConfig = ma_device_config_init(ma_device_type_playback);
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deviceConfig.playback.format = decoder.outputFormat;
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deviceConfig.playback.channels = decoder.outputChannels;
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deviceConfig.sampleRate = decoder.outputSampleRate;
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deviceConfig.dataCallback = data_callback;
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deviceConfig.pUserData = &decoder;
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if (ma_device_init(NULL, &deviceConfig, &device) != MA_SUCCESS) {
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printf("Failed to open playback device.\n");
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ma_decoder_uninit(&decoder);
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return -3;
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}
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if (ma_device_start(&device) != MA_SUCCESS) {
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printf("Failed to start playback device.\n");
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ma_device_uninit(&device);
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ma_decoder_uninit(&decoder);
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return -4;
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}
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printf("Press Enter to quit...");
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getchar();
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ma_device_uninit(&device);
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ma_decoder_uninit(&decoder);
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return 0;
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}
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