cannam@124: /** @file patest_in_overflow.c cannam@124: @ingroup test_src cannam@124: @brief Count input overflows (using paInputOverflow flag) under cannam@124: overloaded and normal conditions. cannam@124: This test uses the same method to overload the stream as does cannam@124: patest_out_underflow.c -- it generates sine waves until the cpu load cannam@124: exceeds a certain level. However this test is only concerned with cannam@124: input and so doesn't ouput any sound. cannam@124: cannam@124: @author Ross Bencina cannam@124: @author Phil Burk cannam@124: */ cannam@124: /* cannam@124: * $Id: patest_in_overflow.c 1368 2008-03-01 00:38:27Z rossb $ cannam@124: * cannam@124: * This program uses the PortAudio Portable Audio Library. cannam@124: * For more information see: http://www.portaudio.com cannam@124: * Copyright (c) 1999-2004 Ross Bencina and Phil Burk cannam@124: * cannam@124: * Permission is hereby granted, free of charge, to any person obtaining cannam@124: * a copy of this software and associated documentation files cannam@124: * (the "Software"), to deal in the Software without restriction, cannam@124: * including without limitation the rights to use, copy, modify, merge, cannam@124: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@124: * and to permit persons to whom the Software is furnished to do so, cannam@124: * subject to the following conditions: cannam@124: * cannam@124: * The above copyright notice and this permission notice shall be cannam@124: * included in all copies or substantial portions of the Software. cannam@124: * cannam@124: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@124: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@124: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@124: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@124: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@124: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@124: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@124: */ cannam@124: cannam@124: /* cannam@124: * The text above constitutes the entire PortAudio license; however, cannam@124: * the PortAudio community also makes the following non-binding requests: cannam@124: * cannam@124: * Any person wishing to distribute modifications to the Software is cannam@124: * requested to send the modifications to the original developer so that cannam@124: * they can be incorporated into the canonical version. It is also cannam@124: * requested that these non-binding requests be included along with the cannam@124: * license above. cannam@124: */ cannam@124: cannam@124: #include cannam@124: #include cannam@124: #include "portaudio.h" cannam@124: cannam@124: #define MAX_SINES (500) cannam@124: #define MAX_LOAD (1.2) cannam@124: #define SAMPLE_RATE (44100) cannam@124: #define FRAMES_PER_BUFFER (512) cannam@124: #ifndef M_PI cannam@124: #define M_PI (3.14159265) cannam@124: #endif cannam@124: #define TWOPI (M_PI * 2.0) cannam@124: cannam@124: typedef struct paTestData cannam@124: { cannam@124: int sineCount; cannam@124: double phases[MAX_SINES]; cannam@124: int countOverflows; cannam@124: int inputOverflowCount; cannam@124: } cannam@124: paTestData; cannam@124: cannam@124: /* This routine will be called by the PortAudio engine when audio is needed. cannam@124: ** It may called at interrupt level on some machines so don't do anything cannam@124: ** that could mess up the system like calling malloc() or free(). cannam@124: */ cannam@124: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void *userData ) cannam@124: { cannam@124: paTestData *data = (paTestData*)userData; cannam@124: float out; /* variable to hold dummy output */ cannam@124: unsigned long i; cannam@124: int j; cannam@124: int finished = paContinue; cannam@124: (void) timeInfo; /* Prevent unused variable warning. */ cannam@124: (void) inputBuffer; /* Prevent unused variable warning. */ cannam@124: (void) outputBuffer; /* Prevent unused variable warning. */ cannam@124: cannam@124: if( data->countOverflows && (statusFlags & paInputOverflow) ) cannam@124: data->inputOverflowCount++; cannam@124: cannam@124: for( i=0; isineCount; j++ ) cannam@124: { cannam@124: /* Advance phase of next oscillator. */ cannam@124: phase = data->phases[j]; cannam@124: phase += phaseInc; cannam@124: if( phase > TWOPI ) phase -= TWOPI; cannam@124: cannam@124: phaseInc *= 1.02; cannam@124: if( phaseInc > 0.5 ) phaseInc *= 0.5; cannam@124: cannam@124: /* This is not a very efficient way to calc sines. */ cannam@124: output += (float) sin( phase ); cannam@124: data->phases[j] = phase; cannam@124: } cannam@124: /* this is an input-only stream so we don't actually use the output */ cannam@124: out = (float) (output / data->sineCount); cannam@124: (void) out; /* suppress unused variable warning*/ cannam@124: } cannam@124: cannam@124: return finished; cannam@124: } cannam@124: cannam@124: /*******************************************************************/ cannam@124: int main(void); cannam@124: int main(void) cannam@124: { cannam@124: PaStreamParameters inputParameters; cannam@124: PaStream *stream; cannam@124: PaError err; cannam@124: int safeSineCount, stressedSineCount; cannam@124: int safeOverflowCount, stressedOverflowCount; cannam@124: paTestData data = {0}; cannam@124: double load; cannam@124: cannam@124: cannam@124: printf("PortAudio Test: input only, no sound output. Load callback by performing calculations, count input overflows. SR = %d, BufSize = %d. MAX_LOAD = %f\n", cannam@124: SAMPLE_RATE, FRAMES_PER_BUFFER, (float)MAX_LOAD ); cannam@124: cannam@124: err = Pa_Initialize(); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */ cannam@124: if (inputParameters.device == paNoDevice) { cannam@124: fprintf(stderr,"Error: No default input device.\n"); cannam@124: goto error; cannam@124: } cannam@124: inputParameters.channelCount = 1; /* mono output */ cannam@124: inputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@124: inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency; cannam@124: inputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: err = Pa_OpenStream( cannam@124: &stream, cannam@124: &inputParameters, cannam@124: NULL, /* no output */ cannam@124: SAMPLE_RATE, cannam@124: FRAMES_PER_BUFFER, cannam@124: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@124: patestCallback, cannam@124: &data ); cannam@124: if( err != paNoError ) goto error; cannam@124: err = Pa_StartStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: printf("Establishing load conditions...\n" ); cannam@124: cannam@124: /* Determine number of sines required to get to 50% */ cannam@124: do cannam@124: { cannam@124: data.sineCount++; cannam@124: Pa_Sleep( 100 ); cannam@124: cannam@124: load = Pa_GetStreamCpuLoad( stream ); cannam@124: printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@124: } cannam@124: while( load < 0.5 && data.sineCount < (MAX_SINES-1)); cannam@124: cannam@124: safeSineCount = data.sineCount; cannam@124: cannam@124: /* Calculate target stress value then ramp up to that level*/ cannam@124: stressedSineCount = (int) (2.0 * data.sineCount * MAX_LOAD ); cannam@124: if( stressedSineCount > MAX_SINES ) cannam@124: stressedSineCount = MAX_SINES; cannam@124: for( ; data.sineCount < stressedSineCount; data.sineCount++ ) cannam@124: { cannam@124: Pa_Sleep( 100 ); cannam@124: load = Pa_GetStreamCpuLoad( stream ); cannam@124: printf("STRESSING: sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@124: } cannam@124: cannam@124: printf("Counting overflows for 5 seconds.\n"); cannam@124: data.countOverflows = 1; cannam@124: Pa_Sleep( 5000 ); cannam@124: cannam@124: stressedOverflowCount = data.inputOverflowCount; cannam@124: cannam@124: data.countOverflows = 0; cannam@124: data.sineCount = safeSineCount; cannam@124: cannam@124: printf("Resuming safe load...\n"); cannam@124: Pa_Sleep( 1500 ); cannam@124: data.inputOverflowCount = 0; cannam@124: Pa_Sleep( 1500 ); cannam@124: load = Pa_GetStreamCpuLoad( stream ); cannam@124: printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@124: cannam@124: printf("Counting overflows for 5 seconds.\n"); cannam@124: data.countOverflows = 1; cannam@124: Pa_Sleep( 5000 ); cannam@124: cannam@124: safeOverflowCount = data.inputOverflowCount; cannam@124: cannam@124: printf("Stop stream.\n"); cannam@124: err = Pa_StopStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: err = Pa_CloseStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_Terminate(); cannam@124: cannam@124: if( stressedOverflowCount == 0 ) cannam@124: printf("Test failed, no input overflows detected under stress.\n"); cannam@124: else if( safeOverflowCount != 0 ) cannam@124: printf("Test failed, %d unexpected overflows detected under safe load.\n", safeOverflowCount); cannam@124: else cannam@124: printf("Test passed, %d expected input overflows detected under stress, 0 unexpected overflows detected under safe load.\n", stressedOverflowCount ); cannam@124: cannam@124: return err; cannam@124: error: cannam@124: Pa_Terminate(); cannam@124: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@124: fprintf( stderr, "Error number: %d\n", err ); cannam@124: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@124: return err; cannam@124: }