Mercurial > hg > audiostuff
comparison rtaudio-test.cpp @ 1:9cadc470e3da
reorganize, add more
| author | pmeerw@pan |
|---|---|
| date | Fri, 30 Oct 2009 23:07:52 +0100 |
| parents | |
| children |
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| 0:deadffdf5d60 | 1:9cadc470e3da |
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| 1 #include <cmath> | |
| 2 #include <stdlib.h> | |
| 3 #include <iostream> | |
| 4 #include <vector> | |
| 5 #include "RtAudio.h" | |
| 6 | |
| 7 int myCallback(void *outputBuffer, void *inputBuffer, unsigned int bufferFrames, double streamTime, RtAudioStreamStatus status, void *userData) { | |
| 8 unsigned int i, j; | |
| 9 float *buffer = (float *) outputBuffer; | |
| 10 | |
| 11 if ( status ) | |
| 12 std::cout << "Stream underflow detected!" << std::endl; | |
| 13 | |
| 14 if (!buffer) | |
| 15 return 0; | |
| 16 | |
| 17 // Write interleaved audio data. | |
| 18 static int t = 0; | |
| 19 for ( i=0; i<bufferFrames/2; i++ ) { | |
| 20 for ( j=0; j<2; j++ ) { | |
| 21 *buffer++ = 0; // 0.25*cosf((t/(float)1000)); | |
| 22 | |
| 23 } | |
| 24 if (++t > 1000) t = 0; | |
| 25 } | |
| 26 | |
| 27 return 0; | |
| 28 } | |
| 29 | |
| 30 int main() { | |
| 31 RtAudio audio; | |
| 32 | |
| 33 // Determine the number of devices available | |
| 34 unsigned int devices = audio.getDeviceCount(); | |
| 35 std::cout << devices << " devices found\n"; | |
| 36 | |
| 37 // Scan through devices for various capabilities | |
| 38 RtAudio::DeviceInfo info; | |
| 39 for ( unsigned int i=0; i<devices; i++ ) { | |
| 40 | |
| 41 info = audio.getDeviceInfo( i ); | |
| 42 | |
| 43 if ( info.probed == true ) { | |
| 44 // Print, for example, the maximum number of output channels for each device | |
| 45 std::cout << "device: #" << i << " - " << info.name << "\n"; | |
| 46 std::cout << " output channels: " << info.outputChannels << "\n"; | |
| 47 std::cout << " input channels: " << info.inputChannels << "\n"; | |
| 48 std::cout << " duplex channels: " << info.duplexChannels << "\n"; | |
| 49 std::cout << " default input/output: " << info.isDefaultInput << " / " << info.isDefaultOutput << "\n"; | |
| 50 | |
| 51 std::cout << " sample rates:\n"; | |
| 52 for (std::vector<unsigned int>::iterator i = info.sampleRates.begin(); i != info.sampleRates.end(); i++) { | |
| 53 std::cout << " " << *i << "\n"; | |
| 54 } | |
| 55 std::cout << " data formats:\n"; | |
| 56 if (info.nativeFormats & RTAUDIO_SINT8) std::cout << " signed 8-bit\n"; | |
| 57 if (info.nativeFormats & RTAUDIO_SINT16) std::cout << " signed 16-bit\n"; | |
| 58 if (info.nativeFormats & RTAUDIO_SINT24) std::cout << " signed 24-bit\n"; | |
| 59 if (info.nativeFormats & RTAUDIO_SINT32) std::cout << " signed 32-bit\n"; | |
| 60 if (info.nativeFormats & RTAUDIO_FLOAT32) std::cout << " 32-bit float [-1,1]\n"; | |
| 61 if (info.nativeFormats & RTAUDIO_FLOAT64) std::cout << " 64-bit float [-1,1]\n"; | |
| 62 } | |
| 63 else | |
| 64 std::cout << "device: #" << i << " - not probed\n"; | |
| 65 } | |
| 66 | |
| 67 RtAudio::StreamParameters oparam; | |
| 68 oparam.deviceId = audio.getDefaultOutputDevice(); | |
| 69 oparam.nChannels = 1; | |
| 70 oparam.firstChannel = 0; | |
| 71 | |
| 72 RtAudio::StreamParameters iparam; | |
| 73 iparam.deviceId = audio.getDefaultInputDevice(); | |
| 74 iparam.nChannels = 1; | |
| 75 iparam.firstChannel = 0; | |
| 76 | |
| 77 | |
| 78 unsigned int sampleRate = 44100; | |
| 79 unsigned int bufferFrames = 256; // 256 sample frames | |
| 80 | |
| 81 RtAudio::StreamOptions options; | |
| 82 options.flags = 0; | |
| 83 options.numberOfBuffers = 2; | |
| 84 options.streamName = "test"; | |
| 85 | |
| 86 | |
| 87 try { | |
| 88 audio.openStream( &oparam, &iparam, RTAUDIO_FLOAT32, | |
| 89 sampleRate, &bufferFrames, &myCallback, (void*) 0, &options ); | |
| 90 audio.startStream(); | |
| 91 } | |
| 92 catch ( RtError& e ) { | |
| 93 std::cout << '\n' << e.getMessage() << '\n' << std::endl; | |
| 94 exit( EXIT_FAILURE ); | |
| 95 } | |
| 96 | |
| 97 char input; | |
| 98 std::cout << "\nPlaying ... press <enter> to quit.\n"; | |
| 99 std::cin.get( input ); | |
| 100 | |
| 101 try { | |
| 102 // Stop the stream | |
| 103 audio.stopStream(); | |
| 104 } | |
| 105 catch (RtError& e) { | |
| 106 e.printMessage(); | |
| 107 } | |
| 108 | |
| 109 if ( audio.isStreamOpen() ) | |
| 110 audio.closeStream(); | |
| 111 | |
| 112 return EXIT_SUCCESS; | |
| 113 } |