cannam@162: /** @file patest_prime.c cannam@162: @ingroup test_src cannam@162: @brief Test stream priming mode. cannam@162: @author Ross Bencina http://www.audiomulch.com/~rossb cannam@162: */ 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) 1999-2000 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: #include "pa_util.h" cannam@162: cannam@162: #define NUM_BEEPS (3) cannam@162: #define SAMPLE_RATE (44100) cannam@162: #define SAMPLE_PERIOD (1.0/44100.0) cannam@162: #define FRAMES_PER_BUFFER (256) cannam@162: #define BEEP_DURATION (400) cannam@162: #define IDLE_DURATION (SAMPLE_RATE*2) /* 2 seconds */ cannam@162: #define SLEEP_MSEC (50) cannam@162: cannam@162: #define STATE_BKG_IDLE (0) cannam@162: #define STATE_BKG_BEEPING (1) cannam@162: cannam@162: typedef struct cannam@162: { cannam@162: float leftPhase; cannam@162: float rightPhase; cannam@162: int state; cannam@162: int beepCountdown; cannam@162: int idleCountdown; cannam@162: } cannam@162: paTestData; cannam@162: cannam@162: static void InitializeTestData( paTestData *testData ) cannam@162: { cannam@162: testData->leftPhase = 0; cannam@162: testData->rightPhase = 0; cannam@162: testData->state = STATE_BKG_BEEPING; cannam@162: testData->beepCountdown = BEEP_DURATION; cannam@162: testData->idleCountdown = IDLE_DURATION; cannam@162: } 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, void *userData ) cannam@162: { cannam@162: /* Cast data passed through stream to our structure. */ cannam@162: paTestData *data = (paTestData*)userData; cannam@162: float *out = (float*)outputBuffer; cannam@162: unsigned int i; cannam@162: int result = paContinue; cannam@162: cannam@162: /* supress unused parameter warnings */ cannam@162: (void) inputBuffer; cannam@162: (void) timeInfo; cannam@162: (void) statusFlags; cannam@162: cannam@162: for( i=0; istate ) cannam@162: { cannam@162: case STATE_BKG_IDLE: cannam@162: *out++ = 0.0; /* left */ cannam@162: *out++ = 0.0; /* right */ cannam@162: --data->idleCountdown; cannam@162: cannam@162: if( data->idleCountdown <= 0 ) result = paComplete; cannam@162: break; cannam@162: cannam@162: case STATE_BKG_BEEPING: cannam@162: if( data->beepCountdown <= 0 ) cannam@162: { cannam@162: data->state = STATE_BKG_IDLE; cannam@162: *out++ = 0.0; /* left */ cannam@162: *out++ = 0.0; /* right */ cannam@162: } cannam@162: else cannam@162: { cannam@162: /* Play sawtooth wave. */ cannam@162: *out++ = data->leftPhase; /* left */ cannam@162: *out++ = data->rightPhase; /* right */ cannam@162: /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */ cannam@162: data->leftPhase += 0.01f; cannam@162: /* When signal reaches top, drop back down. */ cannam@162: if( data->leftPhase >= 1.0f ) data->leftPhase -= 2.0f; cannam@162: /* higher pitch so we can distinguish left and right. */ cannam@162: data->rightPhase += 0.03f; cannam@162: if( data->rightPhase >= 1.0f ) data->rightPhase -= 2.0f; cannam@162: } cannam@162: --data->beepCountdown; cannam@162: break; cannam@162: } cannam@162: } cannam@162: cannam@162: return result; cannam@162: } cannam@162: cannam@162: /*******************************************************************/ cannam@162: static PaError DoTest( int flags ) cannam@162: { cannam@162: PaStream *stream; cannam@162: PaError err = paNoError; cannam@162: paTestData data; cannam@162: PaStreamParameters outputParameters; cannam@162: cannam@162: InitializeTestData( &data ); cannam@162: cannam@162: outputParameters.device = Pa_GetDefaultOutputDevice(); cannam@162: if (outputParameters.device == paNoDevice) { cannam@162: fprintf(stderr,"Error: No default output device.\n"); cannam@162: goto error; cannam@162: } cannam@162: outputParameters.channelCount = 2; cannam@162: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@162: outputParameters.sampleFormat = paFloat32; cannam@162: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency; cannam@162: cannam@162: /* Open an audio I/O stream. */ cannam@162: err = Pa_OpenStream( cannam@162: &stream, cannam@162: NULL, /* no input */ cannam@162: &outputParameters, cannam@162: SAMPLE_RATE, cannam@162: FRAMES_PER_BUFFER, /* frames per buffer */ cannam@162: paClipOff | flags, /* 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: cannam@162: cannam@162: err = Pa_StartStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: printf("hear \"BEEP\"\n" ); cannam@162: fflush(stdout); cannam@162: cannam@162: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(SLEEP_MSEC); cannam@162: if( err < 0 ) goto error; cannam@162: 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: return err; cannam@162: error: cannam@162: return err; cannam@162: } cannam@162: cannam@162: /*******************************************************************/ cannam@162: int main(void); cannam@162: int main(void) cannam@162: { cannam@162: PaError err = paNoError; cannam@162: int i; cannam@162: cannam@162: /* Initialize library before making any other calls. */ cannam@162: err = Pa_Initialize(); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: printf("PortAudio Test: Testing stream playback with no priming.\n"); cannam@162: printf("PortAudio Test: you should see BEEP before you hear it.\n"); cannam@162: printf("BEEP %d times.\n", NUM_BEEPS ); cannam@162: cannam@162: for( i=0; i< NUM_BEEPS; ++i ) cannam@162: { cannam@162: err = DoTest( 0 ); cannam@162: if( err != paNoError ) cannam@162: goto error; cannam@162: } cannam@162: cannam@162: printf("PortAudio Test: Testing stream playback with priming.\n"); cannam@162: printf("PortAudio Test: you should see BEEP around the same time you hear it.\n"); cannam@162: for( i=0; i< NUM_BEEPS; ++i ) cannam@162: { cannam@162: err = DoTest( paPrimeOutputBuffersUsingStreamCallback ); cannam@162: if( err != paNoError ) cannam@162: goto error; cannam@162: } cannam@162: cannam@162: printf("Test finished.\n"); cannam@162: cannam@162: Pa_Terminate(); 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: }