Chris@55: /** @file patest_unplug.c
Chris@55: 	@ingroup test_src
Chris@55: 	@brief Debug a crash involving unplugging a USB device.
Chris@55: 	@author Phil Burk  http://www.softsynth.com
Chris@55: */
Chris@55: /*
Chris@55:  * $Id$
Chris@55:  *
Chris@55:  * This program uses the PortAudio Portable Audio Library.
Chris@55:  * For more information see: http://www.portaudio.com
Chris@55:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
Chris@55:  *
Chris@55:  * Permission is hereby granted, free of charge, to any person obtaining
Chris@55:  * a copy of this software and associated documentation files
Chris@55:  * (the "Software"), to deal in the Software without restriction,
Chris@55:  * including without limitation the rights to use, copy, modify, merge,
Chris@55:  * publish, distribute, sublicense, and/or sell copies of the Software,
Chris@55:  * and to permit persons to whom the Software is furnished to do so,
Chris@55:  * subject to the following conditions:
Chris@55:  *
Chris@55:  * The above copyright notice and this permission notice shall be
Chris@55:  * included in all copies or substantial portions of the Software.
Chris@55:  *
Chris@55:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Chris@55:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Chris@55:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Chris@55:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
Chris@55:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
Chris@55:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Chris@55:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Chris@55:  */
Chris@55: 
Chris@55: /*
Chris@55:  * The text above constitutes the entire PortAudio license; however,
Chris@55:  * the PortAudio community also makes the following non-binding requests:
Chris@55:  *
Chris@55:  * Any person wishing to distribute modifications to the Software is
Chris@55:  * requested to send the modifications to the original developer so that
Chris@55:  * they can be incorporated into the canonical version. It is also
Chris@55:  * requested that these non-binding requests be included along with the
Chris@55:  * license above.
Chris@55:  */
Chris@55: 
Chris@55: #include <stdio.h>
Chris@55: #include <stdlib.h>
Chris@55: #include <memory.h>
Chris@55: #include <math.h>
Chris@55: #include "portaudio.h"
Chris@55: 
Chris@55: #define NUM_SECONDS   (8)
Chris@55: #define SAMPLE_RATE   (44100)
Chris@55: #ifndef M_PI
Chris@55: #define M_PI  (3.14159265)
Chris@55: #endif
Chris@55: #define TABLE_SIZE        (200)
Chris@55: #define FRAMES_PER_BUFFER  (64)
Chris@55: #define MAX_CHANNELS        (8)
Chris@55: 
Chris@55: typedef struct
Chris@55: {
Chris@55:     short sine[TABLE_SIZE];
Chris@55:     int32_t phases[MAX_CHANNELS];
Chris@55:     int32_t numChannels;
Chris@55:     int32_t sampsToGo;
Chris@55: }
Chris@55: paTestData;
Chris@55: 
Chris@55: 
Chris@55: static int inputCallback( const void *inputBuffer, void *outputBuffer,
Chris@55:                           unsigned long framesPerBuffer,
Chris@55:                           const PaStreamCallbackTimeInfo* timeInfo,
Chris@55:                           PaStreamCallbackFlags statusFlags,
Chris@55:                           void *userData )
Chris@55: {
Chris@55:     paTestData *data = (paTestData*)userData;
Chris@55:     int finished = 0;
Chris@55:     (void) inputBuffer; /* Prevent "unused variable" warnings. */
Chris@55:     (void) outputBuffer; /* Prevent "unused variable" warnings. */
Chris@55: 
Chris@55:     data->sampsToGo -= framesPerBuffer;
Chris@55:     if (data->sampsToGo <= 0)
Chris@55:     {
Chris@55:         data->sampsToGo = 0;
Chris@55:         finished = 1;
Chris@55:     }
Chris@55:     return finished;
Chris@55: }
Chris@55: 
Chris@55: static int outputCallback( const void *inputBuffer, void *outputBuffer,
Chris@55:                             unsigned long framesPerBuffer,
Chris@55:                             const PaStreamCallbackTimeInfo* timeInfo,
Chris@55:                             PaStreamCallbackFlags statusFlags,
Chris@55:                             void *userData )
Chris@55: {
Chris@55:     paTestData *data = (paTestData*)userData;
Chris@55:     short *out = (short*)outputBuffer;
Chris@55:     unsigned int i;
Chris@55:     int finished = 0;
Chris@55:     (void) inputBuffer; /* Prevent "unused variable" warnings. */
Chris@55: 
Chris@55:     for( i=0; i<framesPerBuffer; i++ )
Chris@55:     {
Chris@55:         for (int channelIndex = 0; channelIndex < data->numChannels; channelIndex++)
Chris@55:         {
Chris@55:             int phase = data->phases[channelIndex];
Chris@55:             *out++ = data->sine[phase];
Chris@55:             phase += channelIndex + 2;
Chris@55:             if( phase >= TABLE_SIZE ) phase -= TABLE_SIZE;
Chris@55:             data->phases[channelIndex] = phase;
Chris@55:         }
Chris@55:     }
Chris@55:     return finished;
Chris@55: }
Chris@55: 
Chris@55: /*******************************************************************/
Chris@55: int main(int argc, char **args);
Chris@55: int main(int argc, char **args)
Chris@55: {
Chris@55:     PaStreamParameters inputParameters;
Chris@55:     PaStreamParameters outputParameters;
Chris@55:     PaStream *inputStream;
Chris@55:     PaStream *outputStream;
Chris@55:     const PaDeviceInfo *deviceInfo;
Chris@55:     PaError err;
Chris@55:     paTestData data;
Chris@55:     int i;
Chris@55:     int totalSamps;
Chris@55:     int inputDevice = -1;
Chris@55:     int outputDevice = -1;
Chris@55: 
Chris@55:     printf("Test unplugging a USB device.\n");
Chris@55: 
Chris@55:     if( argc > 1 ) {
Chris@55:        inputDevice = outputDevice = atoi( args[1] );
Chris@55:        printf("Using device number %d.\n\n", inputDevice );
Chris@55:     } else {
Chris@55:        printf("Using default device.\n\n" );
Chris@55:     }
Chris@55: 
Chris@55:     memset(&data, 0, sizeof(data));
Chris@55: 
Chris@55:     /* initialise sinusoidal wavetable */
Chris@55:     for( i=0; i<TABLE_SIZE; i++ )
Chris@55:     {
Chris@55:         data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
Chris@55:     }
Chris@55:     data.numChannels = 2;
Chris@55:     data.sampsToGo = totalSamps =  NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
Chris@55: 
Chris@55: 
Chris@55:     err = Pa_Initialize();
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     if( inputDevice == -1 )
Chris@55:         inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
Chris@55:     else
Chris@55:         inputParameters.device = inputDevice ;
Chris@55: 
Chris@55:     if (inputParameters.device == paNoDevice) {
Chris@55:         fprintf(stderr,"Error: No default input device.\n");
Chris@55:         goto error;
Chris@55:     }
Chris@55: 
Chris@55:     if( outputDevice == -1 )
Chris@55:         outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
Chris@55:     else
Chris@55:         outputParameters.device = outputDevice ;
Chris@55: 
Chris@55:     if (outputParameters.device == paNoDevice) {
Chris@55:         fprintf(stderr,"Error: No default output device.\n");
Chris@55:         goto error;
Chris@55:     }
Chris@55: 
Chris@55:     inputParameters.channelCount = 2;
Chris@55:     inputParameters.sampleFormat = paInt16;
Chris@55:     deviceInfo = Pa_GetDeviceInfo( inputParameters.device );
Chris@55:     if( deviceInfo == NULL )
Chris@55:     {
Chris@55:         fprintf( stderr, "No matching input device.\n" );
Chris@55:         goto error;
Chris@55:     }
Chris@55:     inputParameters.suggestedLatency = deviceInfo->defaultLowInputLatency;
Chris@55:     inputParameters.hostApiSpecificStreamInfo = NULL;
Chris@55:     err = Pa_OpenStream(
Chris@55:                 &inputStream,
Chris@55:                 &inputParameters,
Chris@55:                 NULL,
Chris@55:                 SAMPLE_RATE,
Chris@55:                 FRAMES_PER_BUFFER,
Chris@55:                 0,
Chris@55:                 inputCallback,
Chris@55:                 &data );
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     outputParameters.channelCount = 2;
Chris@55:     outputParameters.sampleFormat = paInt16;
Chris@55:     deviceInfo = Pa_GetDeviceInfo( outputParameters.device );
Chris@55:     if( deviceInfo == NULL )
Chris@55:     {
Chris@55:         fprintf( stderr, "No matching output device.\n" );
Chris@55:         goto error;
Chris@55:     }
Chris@55:     outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency;
Chris@55:     outputParameters.hostApiSpecificStreamInfo = NULL;
Chris@55:     err = Pa_OpenStream(
Chris@55:                 &outputStream,
Chris@55:                 NULL,
Chris@55:                 &outputParameters,
Chris@55:                 SAMPLE_RATE,
Chris@55:                 FRAMES_PER_BUFFER,
Chris@55:                 (paClipOff | paDitherOff),
Chris@55:                 outputCallback,
Chris@55:                 &data );
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     err = Pa_StartStream( inputStream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55:     err = Pa_StartStream( outputStream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     printf("When you hear sound, unplug the USB device.\n");
Chris@55:     do
Chris@55:     {
Chris@55:         Pa_Sleep(500);
Chris@55:         printf("Frames remaining = %d\n", data.sampsToGo);
Chris@55:         printf("Pa_IsStreamActive(inputStream) = %d\n", Pa_IsStreamActive(inputStream));
Chris@55:         printf("Pa_IsStreamActive(outputStream) = %d\n", Pa_IsStreamActive(outputStream));
Chris@55:     } while( Pa_IsStreamActive(inputStream) && Pa_IsStreamActive(outputStream) );
Chris@55: 
Chris@55:     err = Pa_CloseStream( inputStream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55:     err = Pa_CloseStream( outputStream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55:     Pa_Terminate();
Chris@55:     return paNoError;
Chris@55: error:
Chris@55:     Pa_Terminate();
Chris@55:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
Chris@55:     fprintf( stderr, "Error number: %d\n", err );
Chris@55:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
Chris@55:     fprintf( stderr, "Host Error message: %s\n", Pa_GetLastHostErrorInfo()->errorText );
Chris@55:     return err;
Chris@55: }