cannam@89: /** @file patest_sine_formats.c cannam@89: @ingroup test_src cannam@89: @brief Play a sine wave for several seconds. Test various data formats. cannam@89: @author Phil Burk cannam@89: */ cannam@89: /* cannam@89: * $Id: patest_sine_formats.c 1097 2006-08-26 08:27:53Z rossb $ cannam@89: * cannam@89: * This program uses the PortAudio Portable Audio Library. cannam@89: * For more information see: http://www.portaudio.com cannam@89: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk cannam@89: * cannam@89: * Permission is hereby granted, free of charge, to any person obtaining cannam@89: * a copy of this software and associated documentation files cannam@89: * (the "Software"), to deal in the Software without restriction, cannam@89: * including without limitation the rights to use, copy, modify, merge, cannam@89: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@89: * and to permit persons to whom the Software is furnished to do so, cannam@89: * subject to the following conditions: cannam@89: * cannam@89: * The above copyright notice and this permission notice shall be cannam@89: * included in all copies or substantial portions of the Software. cannam@89: * cannam@89: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@89: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@89: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@89: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@89: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@89: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@89: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@89: */ cannam@89: cannam@89: /* cannam@89: * The text above constitutes the entire PortAudio license; however, cannam@89: * the PortAudio community also makes the following non-binding requests: cannam@89: * cannam@89: * Any person wishing to distribute modifications to the Software is cannam@89: * requested to send the modifications to the original developer so that cannam@89: * they can be incorporated into the canonical version. It is also cannam@89: * requested that these non-binding requests be included along with the cannam@89: * license above. cannam@89: */ cannam@89: #include cannam@89: #include cannam@89: #include "portaudio.h" cannam@89: cannam@89: #define NUM_SECONDS (10) cannam@89: #define SAMPLE_RATE (44100) cannam@89: #define FRAMES_PER_BUFFER (512) cannam@89: #define LEFT_FREQ (SAMPLE_RATE/256.0) /* So we hit 1.0 */ cannam@89: #define RIGHT_FREQ (500.0) cannam@89: #define AMPLITUDE (1.0) cannam@89: cannam@89: /* Select ONE format for testing. */ cannam@89: #define TEST_UINT8 (0) cannam@89: #define TEST_INT8 (0) cannam@89: #define TEST_INT16 (1) cannam@89: #define TEST_FLOAT32 (0) cannam@89: cannam@89: #if TEST_UINT8 cannam@89: #define TEST_FORMAT paUInt8 cannam@89: typedef unsigned char SAMPLE_t; cannam@89: #define SAMPLE_ZERO (0x80) cannam@89: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) cannam@89: #define FORMAT_NAME "Unsigned 8 Bit" cannam@89: cannam@89: #elif TEST_INT8 cannam@89: #define TEST_FORMAT paInt8 cannam@89: typedef char SAMPLE_t; cannam@89: #define SAMPLE_ZERO (0) cannam@89: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) cannam@89: #define FORMAT_NAME "Signed 8 Bit" cannam@89: cannam@89: #elif TEST_INT16 cannam@89: #define TEST_FORMAT paInt16 cannam@89: typedef short SAMPLE_t; cannam@89: #define SAMPLE_ZERO (0) cannam@89: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(32767 * (x))) cannam@89: #define FORMAT_NAME "Signed 16 Bit" cannam@89: cannam@89: #elif TEST_FLOAT32 cannam@89: #define TEST_FORMAT paFloat32 cannam@89: typedef float SAMPLE_t; cannam@89: #define SAMPLE_ZERO (0.0) cannam@89: #define DOUBLE_TO_SAMPLE(x) ((SAMPLE_t)(x)) cannam@89: #define FORMAT_NAME "Float 32 Bit" cannam@89: #endif cannam@89: cannam@89: #ifndef M_PI cannam@89: #define M_PI (3.14159265) cannam@89: #endif cannam@89: cannam@89: cannam@89: typedef struct cannam@89: { cannam@89: double left_phase; cannam@89: double right_phase; cannam@89: unsigned int framesToGo; cannam@89: } cannam@89: paTestData; cannam@89: /* This routine will be called by the PortAudio engine when audio is needed. cannam@89: ** It may called at interrupt level on some machines so don't do anything cannam@89: ** that could mess up the system like calling malloc() or free(). cannam@89: */ cannam@89: static int patestCallback( const void *inputBuffer, cannam@89: void *outputBuffer, cannam@89: unsigned long framesPerBuffer, cannam@89: const PaStreamCallbackTimeInfo* timeInfo, cannam@89: PaStreamCallbackFlags statusFlags, cannam@89: void *userData ) cannam@89: { cannam@89: paTestData *data = (paTestData*)userData; cannam@89: SAMPLE_t *out = (SAMPLE_t *)outputBuffer; cannam@89: int i; cannam@89: int framesToCalc; cannam@89: int finished = 0; cannam@89: (void) inputBuffer; /* Prevent unused variable warnings. */ cannam@89: cannam@89: if( data->framesToGo < framesPerBuffer ) cannam@89: { cannam@89: framesToCalc = data->framesToGo; cannam@89: data->framesToGo = 0; cannam@89: finished = 1; cannam@89: } cannam@89: else cannam@89: { cannam@89: framesToCalc = framesPerBuffer; cannam@89: data->framesToGo -= framesPerBuffer; cannam@89: } cannam@89: cannam@89: for( i=0; ileft_phase += (LEFT_FREQ / SAMPLE_RATE); cannam@89: if( data->left_phase > 1.0) data->left_phase -= 1.0; cannam@89: *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. ))); cannam@89: cannam@89: data->right_phase += (RIGHT_FREQ / SAMPLE_RATE); cannam@89: if( data->right_phase > 1.0) data->right_phase -= 1.0; cannam@89: *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->right_phase * M_PI * 2. ))); cannam@89: } cannam@89: /* zero remainder of final buffer */ cannam@89: for( ; i<(int)framesPerBuffer; i++ ) cannam@89: { cannam@89: *out++ = SAMPLE_ZERO; /* left */ cannam@89: *out++ = SAMPLE_ZERO; /* right */ cannam@89: } cannam@89: return finished; cannam@89: } cannam@89: /*******************************************************************/ cannam@89: int main(void); cannam@89: int main(void) cannam@89: { cannam@89: PaStream *stream; cannam@89: PaStreamParameters outputParameters; cannam@89: PaError err; cannam@89: paTestData data; cannam@89: int totalSamps; cannam@89: cannam@89: printf("PortAudio Test: output " FORMAT_NAME "\n"); cannam@89: cannam@89: data.left_phase = data.right_phase = 0.0; cannam@89: data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */ cannam@89: err = Pa_Initialize(); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: cannam@89: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */ cannam@89: outputParameters.channelCount = 2; /* Stereo output */ cannam@89: outputParameters.sampleFormat = TEST_FORMAT; /* Selected above. */ cannam@89: outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency; cannam@89: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@89: err = Pa_OpenStream( &stream, cannam@89: NULL, /* No input. */ cannam@89: &outputParameters, /* As above. */ cannam@89: SAMPLE_RATE, cannam@89: FRAMES_PER_BUFFER, cannam@89: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@89: patestCallback, cannam@89: &data ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: err = Pa_StartStream( stream ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS ); cannam@89: cannam@89: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100); cannam@89: if( err < 0 ) goto error; cannam@89: cannam@89: err = Pa_CloseStream( stream ); cannam@89: if( err != paNoError ) goto error; cannam@89: Pa_Terminate(); cannam@89: cannam@89: printf("PortAudio Test Finished: " FORMAT_NAME "\n"); cannam@89: cannam@89: return err; cannam@89: error: cannam@89: Pa_Terminate(); cannam@89: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@89: fprintf( stderr, "Error number: %d\n", err ); cannam@89: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@89: return err; cannam@89: }