examples/alure-stream.cpp

   1 /*
   2  * A simple example showing how to stream a file through a source.
   3  */
   4
   5 #include <iostream>
   6 #include <sstream>
   7 #include <iomanip>
   8 #include <cstring>
   9 #include <thread>
  10 #include <chrono>
  11
  12 #include "alure2.h"
  13
  14 int main(int argc, char *argv[])
  15 {
  16     alure::DeviceManager &devMgr = alure::DeviceManager::get();
  17
  18     int fileidx = 1;
  19     alure::Device dev;
  20     if(argc > 3 && strcmp(argv[1], "-device") == 0)
  21     {
  22         fileidx = 3;
  23         dev = devMgr.openPlayback(argv[2], std::nothrow);
  24         if(!dev)
  25             std::cerr<< "Failed to open \""<<argv[2]<<"\" - trying default" <<std::endl;
  26     }
  27     if(!dev)
  28         dev = devMgr.openPlayback();
  29     std::cout<< "Opened \""<<dev.getName()<<"\"" <<std::endl;
  30
  31     alure::Context ctx = dev.createContext();
  32     alure::Context::MakeCurrent(ctx);
  33
  34     for(int i = fileidx;i < argc;i++)
  35     {
  36         float offset = 0.0f;
  37         if(i+2 < argc && strcmp(argv[i], "-start") == 0)
  38         {
  39             std::stringstream sstr(argv[i+1]);
  40             sstr >> offset;
  41
  42             i += 2;
  43         }
  44
  45         alure::SharedPtr<alure::Decoder> decoder(ctx.createDecoder(argv[i]));
  46         alure::Source source = ctx.createSource();
  47
  48         if(offset > 0.0f)
  49             source.setOffset(uint64_t(offset * decoder->getFrequency()));
  50
  51         source.play(decoder, 12000, 4);
  52         std::cout<< "Playing "<<argv[i]<<" ("<<alure::GetSampleTypeName(decoder->getSampleType())<<", "
  53                                              <<alure::GetChannelConfigName(decoder->getChannelConfig())<<", "
  54                                              <<decoder->getFrequency()<<"hz)" <<std::endl;
  55
  56         float invfreq = 1.0f / decoder->getFrequency();
  57         while(source.isPlaying())
  58         {
  59             std::cout<< "\r "<<std::setiosflags(std::ios::fixed)<<std::setprecision(2)<<
  60                         (source.getOffset()*invfreq)<<" / "<<(decoder->getLength()*invfreq);
  61             std::cout.flush();
  62             std::this_thread::sleep_for(std::chrono::milliseconds(25));
  63             ctx.update();
  64         }
  65         std::cout<<std::endl;
  66
  67         source.release();
  68     }
  69
  70     alure::Context::MakeCurrent(nullptr);
  71     ctx.destroy();
  72     dev.close();
  73
  74     return 0;
  75 }