mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-26 12:37:09 +08:00
107 lines
2.5 KiB
C++
107 lines
2.5 KiB
C++
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#include "SDLAudioDevice.h"
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#include "Util/logger.h"
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using namespace std;
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using namespace toolkit;
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SDLAudioDevice& SDLAudioDevice::Instance() {
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static SDLAudioDevice *instance(new SDLAudioDevice);
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return *instance;
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}
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SDLAudioDevice::SDLAudioDevice() {
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SDL_AudioSpec wanted_spec;
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wanted_spec.freq = DEFAULT_SAMPLERATE;
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wanted_spec.format = DEFAULT_SAMPLEBIT == 16 ? AUDIO_S16 : AUDIO_S8;
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wanted_spec.channels = DEFAULT_CHANNEL;
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wanted_spec.silence = 0;
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wanted_spec.samples = DEFAULT_PCMSIZE / (DEFAULT_CHANNEL * DEFAULT_SAMPLEBIT / 8) ;
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wanted_spec.size = DEFAULT_PCMSIZE;
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wanted_spec.callback = SDLAudioDevice::onReqPCM;
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wanted_spec.userdata = this;
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if (SDL_OpenAudio(&wanted_spec, &_audioConfig)<0) {
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// throw std::runtime_error("SDL_OpenAudio failed");
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InfoL << "SDL_OpenAudio failed";
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}else{
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InfoL << "actual audioSpec: " << "freq=" << _audioConfig.freq
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<< ",format=" << hex<<_audioConfig.format<<dec
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<< ",channels=" << _audioConfig.channels
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<< ",samples=" << _audioConfig.samples
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<< ",size=" << _audioConfig.size;
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}
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_pcmBuf.reset(new char[_audioConfig.size * 10],[](char *ptr){
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delete [] ptr;
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});
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}
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SDLAudioDevice::~SDLAudioDevice() {
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}
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void SDLAudioDevice::addChannel(AudioSRC* chn) {
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lock_guard<recursive_mutex> lck(_mutexChannel);
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if(_channelSet.empty()){
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SDL_PauseAudio(0);
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}
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chn->setOutputAudioConfig(_audioConfig);
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_channelSet.emplace(chn);
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}
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void SDLAudioDevice::delChannel(AudioSRC* chn) {
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lock_guard<recursive_mutex> lck(_mutexChannel);
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_channelSet.erase(chn);
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if(_channelSet.empty()){
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SDL_PauseAudio(true);
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}
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}
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void SDLAudioDevice::onReqPCM(void* userdata, Uint8* stream, int len) {
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SDLAudioDevice *_this = (SDLAudioDevice *)userdata;
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_this->onReqPCM((char *)stream,len);
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}
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void SDLAudioDevice::onReqPCM(char* stream, int len) {
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lock_guard<recursive_mutex> lck(_mutexChannel);
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int size;
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int channel = 0;
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for(auto &chn : _channelSet){
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if(channel ==0 ){
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size = chn->getPCMData(_pcmBuf.get(),len);
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if(size){
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//InfoL << len << " " << size;
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memcpy(stream,_pcmBuf.get(),size);
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}
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}else{
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size = chn->getPCMData(_pcmBuf.get(),len);
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if(size){
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//InfoL << len << " " << size;
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SDL_MixAudio((Uint8*)stream,(Uint8*)_pcmBuf.get(),size,SDL_MIX_MAXVOLUME);
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}
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}
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if(size){
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channel++;
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}
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}
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if(!channel){
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memset(stream,0,len);
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}
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}
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