Check in of new version 4.0.0 distribution (GS).

1 files changed, 177 insertions, 0 deletions

diff --git a/tests/playsaw.cpp b/tests/playsaw.cpp
new file mode 100644
index 0000000..cbe4203
--- /dev/null
+++ b/tests/playsaw.cpp
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+/******************************************/
+/*
+  playsaw.cpp
+  by Gary P. Scavone, 2006
+
+  This program will output sawtooth waveforms
+  of different frequencies on each channel.
+*/
+/******************************************/
+
+#include "RtAudio.h"
+#include <iostream>
+
+/*
+typedef signed long  MY_TYPE;
+#define FORMAT RTAUDIO_SINT24
+#define SCALE  2147483647.0
+
+typedef char  MY_TYPE;
+#define FORMAT RTAUDIO_SINT8
+#define SCALE  127.0
+
+typedef signed short  MY_TYPE;
+#define FORMAT RTAUDIO_SINT16
+#define SCALE  32767.0
+
+typedef signed long  MY_TYPE;
+#define FORMAT RTAUDIO_SINT32
+#define SCALE  2147483647.0
+*/
+
+typedef float  MY_TYPE;
+#define FORMAT RTAUDIO_FLOAT32
+#define SCALE  1.0
+
+/*
+typedef double  MY_TYPE;
+#define FORMAT RTAUDIO_FLOAT64
+#define SCALE  1.0
+*/
+
+#define BASE_RATE 0.005
+#define TIME   1.0
+
+void usage( void ) {
+  // Error function in case of incorrect command-line
+  // argument specifications
+  std::cout << "\nuseage: playsaw N fs <device> <channelOffset>\n";
+  std::cout << "    where N = number of channels,\n";
+  std::cout << "    fs = the sample rate,\n";
+  std::cout << "    device = optional device to use (default = 0),\n";
+  std::cout << "    and channelOffset = an optional channel offset on the device (default = 0).\n\n";
+  exit( 0 );
+}
+
+unsigned int channels;
+RtAudio::StreamOptions options;
+
+//#define USE_INTERLEAVED
+#if defined( USE_INTERLEAVED )
+
+// Interleaved buffers
+int saw( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
+         double streamTime, RtAudioStreamStatus status, void *data )
+{
+  unsigned int i, j;
+  extern unsigned int channels;
+  MY_TYPE *buffer = (MY_TYPE *) outputBuffer;
+  double *lastValues = (double *) data;
+
+  if ( status )
+    std::cout << "Stream underflow detected!" << std::endl;
+
+  for ( i=0; i<nBufferFrames; i++ ) {
+    for ( j=0; j<channels; j++ ) {
+      *buffer++ = (MY_TYPE) (lastValues[j] * SCALE);
+      lastValues[j] += BASE_RATE * (j+1+(j*0.1));
+      if ( lastValues[j] >= 1.0 ) lastValues[j] -= 2.0;
+    }
+  }
+
+  return 0;
+}
+
+#else // Use non-interleaved buffers
+
+int saw( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
+         double streamTime, RtAudioStreamStatus status, void *data )
+{
+  unsigned int i, j;
+  extern unsigned int channels;
+  MY_TYPE *buffer = (MY_TYPE *) outputBuffer;
+  double *lastValues = (double *) data;
+
+  if ( status )
+    std::cout << "Stream underflow detected!" << std::endl;
+
+  double increment;
+  for ( j=0; j<channels; j++ ) {
+    increment = BASE_RATE * (j+1+(j*0.1));
+    for ( i=0; i<nBufferFrames; i++ ) {
+      *buffer++ = (MY_TYPE) (lastValues[j] * SCALE);
+      lastValues[j] += increment;
+      if ( lastValues[j] >= 1.0 ) lastValues[j] -= 2.0;
+    }
+  }
+
+  return 0;
+}
+#endif
+
+int main( int argc, char *argv[] )
+{
+  unsigned int bufferFrames, fs, device = 0, offset = 0;
+
+  // minimal command-line checking
+  if (argc < 3 || argc > 5 ) usage();
+
+  RtAudio dac;
+  if ( dac.getDeviceCount() < 1 ) {
+    std::cout << "\nNo audio devices found!\n";
+    exit( 0 );
+  }
+
+  channels = (unsigned int) atoi(argv[1]);
+  fs = (unsigned int) atoi(argv[2]);
+  if ( argc > 3 )
+    device = (unsigned int) atoi(argv[3]);
+  if ( argc > 4 )
+    offset = (unsigned int) atoi(argv[4]);
+
+  double *data;
+  data = (double *) calloc( channels, sizeof( double ) );
+
+  // Let RtAudio print messages to stderr.
+  dac.showWarnings( true );
+
+  // Set our stream parameters for output only.
+  bufferFrames = 256;
+  RtAudio::StreamParameters oParams;
+  oParams.deviceId = device;
+  oParams.nChannels = channels;
+  oParams.firstChannel = offset;
+
+
+  options.flags |= RTAUDIO_HOG_DEVICE;
+#if !defined( USE_INTERLEAVED )
+  options.flags |= RTAUDIO_NONINTERLEAVED;
+#endif
+  try {
+    dac.openStream( &oParams, NULL, FORMAT, fs, &bufferFrames, &saw, (void *)data, &options );
+    dac.startStream();
+  }
+  catch ( RtError& e ) {
+    e.printMessage();
+    goto cleanup;
+  }
+
+  char input;
+  std::cout << "\nPlaying ... press <enter> to quit (buffer size = " << bufferFrames << ").\n";
+  std::cin.get( input );
+
+  try {
+    // Stop the stream
+    std::cout << "Stream latency = " << dac.getStreamLatency() << "\n" << std::endl;
+    dac.stopStream();
+  }
+  catch ( RtError& e ) {
+    e.printMessage();
+  }
+
+ cleanup:
+  if ( dac.isStreamOpen() ) dac.closeStream();
+  free( data );
+
+  return 0;
+}