Chris@39: /** @file patest_prime.c Chris@39: @ingroup test_src Chris@39: @brief Test stream priming mode. Chris@39: @author Ross Bencina http://www.audiomulch.com/~rossb Chris@39: */ Chris@39: Chris@39: /* Chris@39: * $Id: patest_prime.c 1371 2008-03-11 14:27:26Z bjornroche $ Chris@39: * Chris@39: * This program uses the PortAudio Portable Audio Library. Chris@39: * For more information see: http://www.portaudio.com Chris@39: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk Chris@39: * Chris@39: * Permission is hereby granted, free of charge, to any person obtaining Chris@39: * a copy of this software and associated documentation files Chris@39: * (the "Software"), to deal in the Software without restriction, Chris@39: * including without limitation the rights to use, copy, modify, merge, Chris@39: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@39: * and to permit persons to whom the Software is furnished to do so, Chris@39: * subject to the following conditions: Chris@39: * Chris@39: * The above copyright notice and this permission notice shall be Chris@39: * included in all copies or substantial portions of the Software. Chris@39: * Chris@39: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@39: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@39: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@39: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@39: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@39: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@39: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@39: */ Chris@39: Chris@39: /* Chris@39: * The text above constitutes the entire PortAudio license; however, Chris@39: * the PortAudio community also makes the following non-binding requests: Chris@39: * Chris@39: * Any person wishing to distribute modifications to the Software is Chris@39: * requested to send the modifications to the original developer so that Chris@39: * they can be incorporated into the canonical version. It is also Chris@39: * requested that these non-binding requests be included along with the Chris@39: * license above. Chris@39: */ Chris@39: Chris@39: #include Chris@39: #include Chris@39: #include "portaudio.h" Chris@39: #include "pa_util.h" Chris@39: Chris@39: #define NUM_BEEPS (3) Chris@39: #define SAMPLE_RATE (44100) Chris@39: #define SAMPLE_PERIOD (1.0/44100.0) Chris@39: #define FRAMES_PER_BUFFER (256) Chris@39: #define BEEP_DURATION (400) Chris@39: #define IDLE_DURATION (SAMPLE_RATE*2) /* 2 seconds */ Chris@39: #define SLEEP_MSEC (50) Chris@39: Chris@39: #define STATE_BKG_IDLE (0) Chris@39: #define STATE_BKG_BEEPING (1) Chris@39: Chris@39: typedef struct Chris@39: { Chris@39: float leftPhase; Chris@39: float rightPhase; Chris@39: int state; Chris@39: int beepCountdown; Chris@39: int idleCountdown; Chris@39: } Chris@39: paTestData; Chris@39: Chris@39: static void InitializeTestData( paTestData *testData ) Chris@39: { Chris@39: testData->leftPhase = 0; Chris@39: testData->rightPhase = 0; Chris@39: testData->state = STATE_BKG_BEEPING; Chris@39: testData->beepCountdown = BEEP_DURATION; Chris@39: testData->idleCountdown = IDLE_DURATION; Chris@39: } Chris@39: Chris@39: /* This routine will be called by the PortAudio engine when audio is needed. Chris@39: ** It may called at interrupt level on some machines so don't do anything Chris@39: ** that could mess up the system like calling malloc() or free(). Chris@39: */ Chris@39: static int patestCallback( const void *inputBuffer, void *outputBuffer, Chris@39: unsigned long framesPerBuffer, Chris@39: const PaStreamCallbackTimeInfo *timeInfo, Chris@39: PaStreamCallbackFlags statusFlags, void *userData ) Chris@39: { Chris@39: /* Cast data passed through stream to our structure. */ Chris@39: paTestData *data = (paTestData*)userData; Chris@39: float *out = (float*)outputBuffer; Chris@39: unsigned int i; Chris@39: int result = paContinue; Chris@39: Chris@39: /* supress unused parameter warnings */ Chris@39: (void) inputBuffer; Chris@39: (void) timeInfo; Chris@39: (void) statusFlags; Chris@39: Chris@39: for( i=0; istate ) Chris@39: { Chris@39: case STATE_BKG_IDLE: Chris@39: *out++ = 0.0; /* left */ Chris@39: *out++ = 0.0; /* right */ Chris@39: --data->idleCountdown; Chris@39: Chris@39: if( data->idleCountdown <= 0 ) result = paComplete; Chris@39: break; Chris@39: Chris@39: case STATE_BKG_BEEPING: Chris@39: if( data->beepCountdown <= 0 ) Chris@39: { Chris@39: data->state = STATE_BKG_IDLE; Chris@39: *out++ = 0.0; /* left */ Chris@39: *out++ = 0.0; /* right */ Chris@39: } Chris@39: else Chris@39: { Chris@39: /* Play sawtooth wave. */ Chris@39: *out++ = data->leftPhase; /* left */ Chris@39: *out++ = data->rightPhase; /* right */ Chris@39: /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */ Chris@39: data->leftPhase += 0.01f; Chris@39: /* When signal reaches top, drop back down. */ Chris@39: if( data->leftPhase >= 1.0f ) data->leftPhase -= 2.0f; Chris@39: /* higher pitch so we can distinguish left and right. */ Chris@39: data->rightPhase += 0.03f; Chris@39: if( data->rightPhase >= 1.0f ) data->rightPhase -= 2.0f; Chris@39: } Chris@39: --data->beepCountdown; Chris@39: break; Chris@39: } Chris@39: } Chris@39: Chris@39: return result; Chris@39: } Chris@39: Chris@39: /*******************************************************************/ Chris@39: static PaError DoTest( int flags ) Chris@39: { Chris@39: PaStream *stream; Chris@39: PaError err = paNoError; Chris@39: paTestData data; Chris@39: PaStreamParameters outputParameters; Chris@39: Chris@39: InitializeTestData( &data ); Chris@39: Chris@39: outputParameters.device = Pa_GetDefaultOutputDevice(); Chris@39: if (outputParameters.device == paNoDevice) { Chris@39: fprintf(stderr,"Error: No default output device.\n"); Chris@39: goto error; Chris@39: } Chris@39: outputParameters.channelCount = 2; Chris@39: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@39: outputParameters.sampleFormat = paFloat32; Chris@39: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency; Chris@39: Chris@39: /* Open an audio I/O stream. */ Chris@39: err = Pa_OpenStream( Chris@39: &stream, Chris@39: NULL, /* no input */ Chris@39: &outputParameters, Chris@39: SAMPLE_RATE, Chris@39: FRAMES_PER_BUFFER, /* frames per buffer */ Chris@39: paClipOff | flags, /* we won't output out of range samples so don't bother clipping them */ Chris@39: patestCallback, Chris@39: &data ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: Chris@39: err = Pa_StartStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: printf("hear \"BEEP\"\n" ); Chris@39: fflush(stdout); Chris@39: Chris@39: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(SLEEP_MSEC); Chris@39: if( err < 0 ) goto error; Chris@39: Chris@39: err = Pa_StopStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: err = Pa_CloseStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: return err; Chris@39: error: Chris@39: return err; Chris@39: } Chris@39: Chris@39: /*******************************************************************/ Chris@39: int main(void); Chris@39: int main(void) Chris@39: { Chris@39: PaError err = paNoError; Chris@39: int i; Chris@39: Chris@39: /* Initialize library before making any other calls. */ Chris@39: err = Pa_Initialize(); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: printf("PortAudio Test: Testing stream playback with no priming.\n"); Chris@39: printf("PortAudio Test: you should see BEEP before you hear it.\n"); Chris@39: printf("BEEP %d times.\n", NUM_BEEPS ); Chris@39: Chris@39: for( i=0; i< NUM_BEEPS; ++i ) Chris@39: { Chris@39: err = DoTest( 0 ); Chris@39: if( err != paNoError ) Chris@39: goto error; Chris@39: } Chris@39: Chris@39: printf("PortAudio Test: Testing stream playback with priming.\n"); Chris@39: printf("PortAudio Test: you should see BEEP around the same time you hear it.\n"); Chris@39: for( i=0; i< NUM_BEEPS; ++i ) Chris@39: { Chris@39: err = DoTest( paPrimeOutputBuffersUsingStreamCallback ); Chris@39: if( err != paNoError ) Chris@39: goto error; Chris@39: } Chris@39: Chris@39: printf("Test finished.\n"); Chris@39: Chris@39: Pa_Terminate(); Chris@39: return err; Chris@39: error: Chris@39: Pa_Terminate(); Chris@39: fprintf( stderr, "An error occured while using the portaudio stream\n" ); Chris@39: fprintf( stderr, "Error number: %d\n", err ); Chris@39: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); Chris@39: return err; Chris@39: }