cannam@162: /** @file patest_in_overflow.c cannam@162: @ingroup test_src cannam@162: @brief Count input overflows (using paInputOverflow flag) under cannam@162: overloaded and normal conditions. cannam@162: This test uses the same method to overload the stream as does cannam@162: patest_out_underflow.c -- it generates sine waves until the cpu load cannam@162: exceeds a certain level. However this test is only concerned with cannam@162: input and so doesn't ouput any sound. cannam@162: cannam@162: @author Ross Bencina cannam@162: @author Phil Burk cannam@162: */ cannam@162: /* cannam@162: * $Id$ cannam@162: * cannam@162: * This program uses the PortAudio Portable Audio Library. cannam@162: * For more information see: http://www.portaudio.com cannam@162: * Copyright (c) 1999-2004 Ross Bencina and Phil Burk cannam@162: * cannam@162: * Permission is hereby granted, free of charge, to any person obtaining cannam@162: * a copy of this software and associated documentation files cannam@162: * (the "Software"), to deal in the Software without restriction, cannam@162: * including without limitation the rights to use, copy, modify, merge, cannam@162: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@162: * and to permit persons to whom the Software is furnished to do so, cannam@162: * subject to the following conditions: cannam@162: * cannam@162: * The above copyright notice and this permission notice shall be cannam@162: * included in all copies or substantial portions of the Software. cannam@162: * cannam@162: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@162: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@162: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@162: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@162: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@162: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@162: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@162: */ cannam@162: cannam@162: /* cannam@162: * The text above constitutes the entire PortAudio license; however, cannam@162: * the PortAudio community also makes the following non-binding requests: cannam@162: * cannam@162: * Any person wishing to distribute modifications to the Software is cannam@162: * requested to send the modifications to the original developer so that cannam@162: * they can be incorporated into the canonical version. It is also cannam@162: * requested that these non-binding requests be included along with the cannam@162: * license above. cannam@162: */ cannam@162: cannam@162: #include cannam@162: #include cannam@162: #include "portaudio.h" cannam@162: cannam@162: #define MAX_SINES (500) cannam@162: #define MAX_LOAD (1.2) cannam@162: #define SAMPLE_RATE (44100) cannam@162: #define FRAMES_PER_BUFFER (512) cannam@162: #ifndef M_PI cannam@162: #define M_PI (3.14159265) cannam@162: #endif cannam@162: #define TWOPI (M_PI * 2.0) cannam@162: cannam@162: typedef struct paTestData cannam@162: { cannam@162: int sineCount; cannam@162: double phases[MAX_SINES]; cannam@162: int countOverflows; cannam@162: int inputOverflowCount; cannam@162: } cannam@162: paTestData; cannam@162: cannam@162: /* This routine will be called by the PortAudio engine when audio is needed. cannam@162: ** It may called at interrupt level on some machines so don't do anything cannam@162: ** that could mess up the system like calling malloc() or free(). cannam@162: */ cannam@162: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@162: unsigned long framesPerBuffer, cannam@162: const PaStreamCallbackTimeInfo* timeInfo, cannam@162: PaStreamCallbackFlags statusFlags, cannam@162: void *userData ) cannam@162: { cannam@162: paTestData *data = (paTestData*)userData; cannam@162: float out; /* variable to hold dummy output */ cannam@162: unsigned long i; cannam@162: int j; cannam@162: int finished = paContinue; cannam@162: (void) timeInfo; /* Prevent unused variable warning. */ cannam@162: (void) inputBuffer; /* Prevent unused variable warning. */ cannam@162: (void) outputBuffer; /* Prevent unused variable warning. */ cannam@162: cannam@162: if( data->countOverflows && (statusFlags & paInputOverflow) ) cannam@162: data->inputOverflowCount++; cannam@162: cannam@162: for( i=0; isineCount; j++ ) cannam@162: { cannam@162: /* Advance phase of next oscillator. */ cannam@162: phase = data->phases[j]; cannam@162: phase += phaseInc; cannam@162: if( phase > TWOPI ) phase -= TWOPI; cannam@162: cannam@162: phaseInc *= 1.02; cannam@162: if( phaseInc > 0.5 ) phaseInc *= 0.5; cannam@162: cannam@162: /* This is not a very efficient way to calc sines. */ cannam@162: output += (float) sin( phase ); cannam@162: data->phases[j] = phase; cannam@162: } cannam@162: /* this is an input-only stream so we don't actually use the output */ cannam@162: out = (float) (output / data->sineCount); cannam@162: (void) out; /* suppress unused variable warning*/ cannam@162: } cannam@162: cannam@162: return finished; cannam@162: } cannam@162: cannam@162: /*******************************************************************/ cannam@162: int main(void); cannam@162: int main(void) cannam@162: { cannam@162: PaStreamParameters inputParameters; cannam@162: PaStream *stream; cannam@162: PaError err; cannam@162: int safeSineCount, stressedSineCount; cannam@162: int safeOverflowCount, stressedOverflowCount; cannam@162: paTestData data = {0}; cannam@162: double load; cannam@162: cannam@162: cannam@162: 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@162: SAMPLE_RATE, FRAMES_PER_BUFFER, (float)MAX_LOAD ); cannam@162: cannam@162: err = Pa_Initialize(); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */ cannam@162: if (inputParameters.device == paNoDevice) { cannam@162: fprintf(stderr,"Error: No default input device.\n"); cannam@162: goto error; cannam@162: } cannam@162: inputParameters.channelCount = 1; /* mono output */ cannam@162: inputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@162: inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency; cannam@162: inputParameters.hostApiSpecificStreamInfo = NULL; cannam@162: cannam@162: err = Pa_OpenStream( cannam@162: &stream, cannam@162: &inputParameters, cannam@162: NULL, /* no output */ cannam@162: SAMPLE_RATE, cannam@162: FRAMES_PER_BUFFER, cannam@162: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@162: patestCallback, cannam@162: &data ); cannam@162: if( err != paNoError ) goto error; cannam@162: err = Pa_StartStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: printf("Establishing load conditions...\n" ); cannam@162: cannam@162: /* Determine number of sines required to get to 50% */ cannam@162: do cannam@162: { cannam@162: data.sineCount++; cannam@162: Pa_Sleep( 100 ); cannam@162: cannam@162: load = Pa_GetStreamCpuLoad( stream ); cannam@162: printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@162: } cannam@162: while( load < 0.5 && data.sineCount < (MAX_SINES-1)); cannam@162: cannam@162: safeSineCount = data.sineCount; cannam@162: cannam@162: /* Calculate target stress value then ramp up to that level*/ cannam@162: stressedSineCount = (int) (2.0 * data.sineCount * MAX_LOAD ); cannam@162: if( stressedSineCount > MAX_SINES ) cannam@162: stressedSineCount = MAX_SINES; cannam@162: for( ; data.sineCount < stressedSineCount; data.sineCount++ ) cannam@162: { cannam@162: Pa_Sleep( 100 ); cannam@162: load = Pa_GetStreamCpuLoad( stream ); cannam@162: printf("STRESSING: sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@162: } cannam@162: cannam@162: printf("Counting overflows for 5 seconds.\n"); cannam@162: data.countOverflows = 1; cannam@162: Pa_Sleep( 5000 ); cannam@162: cannam@162: stressedOverflowCount = data.inputOverflowCount; cannam@162: cannam@162: data.countOverflows = 0; cannam@162: data.sineCount = safeSineCount; cannam@162: cannam@162: printf("Resuming safe load...\n"); cannam@162: Pa_Sleep( 1500 ); cannam@162: data.inputOverflowCount = 0; cannam@162: Pa_Sleep( 1500 ); cannam@162: load = Pa_GetStreamCpuLoad( stream ); cannam@162: printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); cannam@162: cannam@162: printf("Counting overflows for 5 seconds.\n"); cannam@162: data.countOverflows = 1; cannam@162: Pa_Sleep( 5000 ); cannam@162: cannam@162: safeOverflowCount = data.inputOverflowCount; cannam@162: cannam@162: printf("Stop stream.\n"); cannam@162: err = Pa_StopStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: err = Pa_CloseStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: Pa_Terminate(); cannam@162: cannam@162: if( stressedOverflowCount == 0 ) cannam@162: printf("Test failed, no input overflows detected under stress.\n"); cannam@162: else if( safeOverflowCount != 0 ) cannam@162: printf("Test failed, %d unexpected overflows detected under safe load.\n", safeOverflowCount); cannam@162: else cannam@162: printf("Test passed, %d expected input overflows detected under stress, 0 unexpected overflows detected under safe load.\n", stressedOverflowCount ); cannam@162: cannam@162: return err; cannam@162: error: cannam@162: Pa_Terminate(); cannam@162: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@162: fprintf( stderr, "Error number: %d\n", err ); cannam@162: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@162: return err; cannam@162: }