mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 03:10:04 +08:00
107 lines
2.5 KiB
C++
107 lines
2.5 KiB
C++
|
|
#include "SDLAudioDevice.h"
|
|
|
|
#include "Util/logger.h"
|
|
using namespace std;
|
|
using namespace toolkit;
|
|
|
|
SDLAudioDevice& SDLAudioDevice::Instance() {
|
|
static SDLAudioDevice *instance(new SDLAudioDevice);
|
|
return *instance;
|
|
}
|
|
|
|
SDLAudioDevice::SDLAudioDevice() {
|
|
SDL_AudioSpec wanted_spec;
|
|
wanted_spec.freq = DEFAULT_SAMPLERATE;
|
|
wanted_spec.format = DEFAULT_SAMPLEBIT == 16 ? AUDIO_S16 : AUDIO_S8;
|
|
wanted_spec.channels = DEFAULT_CHANNEL;
|
|
wanted_spec.silence = 0;
|
|
wanted_spec.samples = DEFAULT_PCMSIZE / (DEFAULT_CHANNEL * DEFAULT_SAMPLEBIT / 8) ;
|
|
wanted_spec.size = DEFAULT_PCMSIZE;
|
|
wanted_spec.callback = SDLAudioDevice::onReqPCM;
|
|
wanted_spec.userdata = this;
|
|
if (SDL_OpenAudio(&wanted_spec, &_audioConfig)<0) {
|
|
// throw std::runtime_error("SDL_OpenAudio failed");
|
|
InfoL << "SDL_OpenAudio failed";
|
|
}else{
|
|
InfoL << "actual audioSpec: " << "freq=" << _audioConfig.freq
|
|
<< ",format=" << hex<<_audioConfig.format<<dec
|
|
<< ",channels=" << _audioConfig.channels
|
|
<< ",samples=" << _audioConfig.samples
|
|
<< ",size=" << _audioConfig.size;
|
|
|
|
}
|
|
|
|
_pcmBuf.reset(new char[_audioConfig.size * 10],[](char *ptr){
|
|
delete [] ptr;
|
|
});
|
|
}
|
|
|
|
SDLAudioDevice::~SDLAudioDevice() {
|
|
}
|
|
|
|
void SDLAudioDevice::addChannel(AudioSRC* chn) {
|
|
lock_guard<recursive_mutex> lck(_mutexChannel);
|
|
if(_channelSet.empty()){
|
|
SDL_PauseAudio(0);
|
|
}
|
|
chn->setOutputAudioConfig(_audioConfig);
|
|
_channelSet.emplace(chn);
|
|
}
|
|
|
|
void SDLAudioDevice::delChannel(AudioSRC* chn) {
|
|
lock_guard<recursive_mutex> lck(_mutexChannel);
|
|
_channelSet.erase(chn);
|
|
if(_channelSet.empty()){
|
|
SDL_PauseAudio(true);
|
|
}
|
|
}
|
|
|
|
void SDLAudioDevice::onReqPCM(void* userdata, Uint8* stream, int len) {
|
|
SDLAudioDevice *_this = (SDLAudioDevice *)userdata;
|
|
_this->onReqPCM((char *)stream,len);
|
|
}
|
|
|
|
void SDLAudioDevice::onReqPCM(char* stream, int len) {
|
|
lock_guard<recursive_mutex> lck(_mutexChannel);
|
|
int size;
|
|
int channel = 0;
|
|
for(auto &chn : _channelSet){
|
|
if(channel ==0 ){
|
|
size = chn->getPCMData(_pcmBuf.get(),len);
|
|
if(size){
|
|
//InfoL << len << " " << size;
|
|
memcpy(stream,_pcmBuf.get(),size);
|
|
}
|
|
}else{
|
|
size = chn->getPCMData(_pcmBuf.get(),len);
|
|
if(size){
|
|
//InfoL << len << " " << size;
|
|
SDL_MixAudio((Uint8*)stream,(Uint8*)_pcmBuf.get(),size,SDL_MIX_MAXVOLUME);
|
|
}
|
|
}
|
|
if(size){
|
|
channel++;
|
|
}
|
|
}
|
|
|
|
if(!channel){
|
|
memset(stream,0,len);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|