69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
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#define MINIAUDIO_IMPLEMENTATION
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#include "AudioDevice.h"
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#include "common.h"
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gj::AudioDevice::AudioDevice() {
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ma_device_config config = ma_device_config_init(ma_device_type_playback);
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config.playback.format = kFormat;
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config.playback.channels = kChannel;
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config.sampleRate = kSampleRate;
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config.dataCallback = Callback_;
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config.pUserData = this;
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if (ma_device_init(nullptr, &config, &ma_) != MA_SUCCESS) {
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Abort("AudioDevice error");
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}
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ma_device_start(&ma_);
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}
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gj::AudioDevice::~AudioDevice() {
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ma_device_stop(&ma_);
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ma_device_uninit(&ma_);
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/* the worker thread has been exited so no lock is necessary anymore */
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if (playing_) {
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ma_decoder_uninit(&dec_);
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}
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}
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void gj::AudioDevice::PlayMusic(const std::string& path) {
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std::lock_guard _(mtx_);
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if (playing_) {
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ma_decoder_uninit(&dec_);
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}
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ma_decoder_config config = ma_decoder_config_init(kFormat, kChannel, kSampleRate);
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if (ma_decoder_init_file(path.c_str(), &config, &dec_) != MA_SUCCESS) {
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Abort("AudioDevice decoder error: "+path);
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}
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playing_ = true;
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}
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void gj::AudioDevice::StopMusic() {
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std::lock_guard _(mtx_);
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if (!playing_) return;
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ma_decoder_uninit(&dec_);
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playing_ = false;
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}
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void gj::AudioDevice::Callback_(ma_device* ma, void* out, const void* in, ma_uint32 framecnt) {
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AudioDevice* dev = reinterpret_cast<AudioDevice*>(ma->pUserData);
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std::lock_guard _(dev->mtx_);
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float* dst = reinterpret_cast<float*>(out);
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size_t wrote = 0;
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if (dev->playing_) {
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const ma_uint64 n = ma_decoder_read_pcm_frames(&dev->dec_, dst, framecnt);
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if (n < framecnt) {
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dev->playing_ = false;
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ma_decoder_uninit(&dev->dec_);
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}
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wrote += n;
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}
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dev->time_.fetch_add(framecnt);
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}
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