cannam@140: /** @file patest_sine_formats.c
cannam@140: 	@ingroup test_src
cannam@140: 	@brief Play a sine wave for several seconds. Test various data formats.
cannam@140: 	@author Phil Burk
cannam@140: */
cannam@140: /*
cannam@140:  * $Id$
cannam@140:  *
cannam@140:  * This program uses the PortAudio Portable Audio Library.
cannam@140:  * For more information see: http://www.portaudio.com
cannam@140:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@140:  *
cannam@140:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@140:  * a copy of this software and associated documentation files
cannam@140:  * (the "Software"), to deal in the Software without restriction,
cannam@140:  * including without limitation the rights to use, copy, modify, merge,
cannam@140:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@140:  * and to permit persons to whom the Software is furnished to do so,
cannam@140:  * subject to the following conditions:
cannam@140:  *
cannam@140:  * The above copyright notice and this permission notice shall be
cannam@140:  * included in all copies or substantial portions of the Software.
cannam@140:  *
cannam@140:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@140:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@140:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@140:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@140:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@140:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@140:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@140:  */
cannam@140: 
cannam@140: /*
cannam@140:  * The text above constitutes the entire PortAudio license; however, 
cannam@140:  * the PortAudio community also makes the following non-binding requests:
cannam@140:  *
cannam@140:  * Any person wishing to distribute modifications to the Software is
cannam@140:  * requested to send the modifications to the original developer so that
cannam@140:  * they can be incorporated into the canonical version. It is also 
cannam@140:  * requested that these non-binding requests be included along with the 
cannam@140:  * license above.
cannam@140:  */
cannam@140: #include <stdio.h>
cannam@140: #include <math.h>
cannam@140: #include "portaudio.h"
cannam@140: 
cannam@140: #define NUM_SECONDS        (10)
cannam@140: #define SAMPLE_RATE        (44100)
cannam@140: #define FRAMES_PER_BUFFER  (512)
cannam@140: #define LEFT_FREQ          (SAMPLE_RATE/256.0)  /* So we hit 1.0 */
cannam@140: #define RIGHT_FREQ         (500.0)
cannam@140: #define AMPLITUDE          (1.0)
cannam@140: 
cannam@140: /* Select ONE format for testing. */
cannam@140: #define TEST_UINT8    (0)
cannam@140: #define TEST_INT8     (0)
cannam@140: #define TEST_INT16    (1)
cannam@140: #define TEST_FLOAT32  (0)
cannam@140: 
cannam@140: #if TEST_UINT8
cannam@140: #define TEST_FORMAT         paUInt8
cannam@140: typedef unsigned char       SAMPLE_t;
cannam@140: #define SAMPLE_ZERO         (0x80)
cannam@140: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x)))
cannam@140: #define FORMAT_NAME         "Unsigned 8 Bit"
cannam@140: 
cannam@140: #elif TEST_INT8
cannam@140: #define TEST_FORMAT         paInt8
cannam@140: typedef char                SAMPLE_t;
cannam@140: #define SAMPLE_ZERO         (0)
cannam@140: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x)))
cannam@140: #define FORMAT_NAME         "Signed 8 Bit"
cannam@140: 
cannam@140: #elif TEST_INT16
cannam@140: #define TEST_FORMAT         paInt16
cannam@140: typedef short               SAMPLE_t;
cannam@140: #define SAMPLE_ZERO         (0)
cannam@140: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(32767 * (x)))
cannam@140: #define FORMAT_NAME         "Signed 16 Bit"
cannam@140: 
cannam@140: #elif TEST_FLOAT32
cannam@140: #define TEST_FORMAT         paFloat32
cannam@140: typedef float               SAMPLE_t;
cannam@140: #define SAMPLE_ZERO         (0.0)
cannam@140: #define DOUBLE_TO_SAMPLE(x) ((SAMPLE_t)(x))
cannam@140: #define FORMAT_NAME         "Float 32 Bit"
cannam@140: #endif
cannam@140: 
cannam@140: #ifndef M_PI
cannam@140: #define M_PI  (3.14159265)
cannam@140: #endif
cannam@140: 
cannam@140: 
cannam@140: typedef struct
cannam@140: {
cannam@140:     double left_phase;
cannam@140:     double right_phase;
cannam@140:     unsigned int framesToGo;
cannam@140: }
cannam@140: paTestData;
cannam@140: /* This routine will be called by the PortAudio engine when audio is needed.
cannam@140: ** It may called at interrupt level on some machines so don't do anything
cannam@140: ** that could mess up the system like calling malloc() or free().
cannam@140: */
cannam@140: static int patestCallback( const void *inputBuffer,
cannam@140:                            void *outputBuffer,
cannam@140:                            unsigned long framesPerBuffer,
cannam@140:                            const PaStreamCallbackTimeInfo* timeInfo,
cannam@140:                            PaStreamCallbackFlags statusFlags,
cannam@140:                            void *userData )
cannam@140: {
cannam@140:     paTestData *data = (paTestData*)userData;
cannam@140:     SAMPLE_t *out = (SAMPLE_t *)outputBuffer;
cannam@140:     int i;
cannam@140:     int framesToCalc;
cannam@140:     int finished = 0;
cannam@140:     (void) inputBuffer; /* Prevent unused variable warnings. */
cannam@140: 
cannam@140:     if( data->framesToGo < framesPerBuffer )
cannam@140:     {
cannam@140:         framesToCalc = data->framesToGo;
cannam@140:         data->framesToGo = 0;
cannam@140:         finished = 1;
cannam@140:     }
cannam@140:     else
cannam@140:     {
cannam@140:         framesToCalc = framesPerBuffer;
cannam@140:         data->framesToGo -= framesPerBuffer;
cannam@140:     }
cannam@140: 
cannam@140:     for( i=0; i<framesToCalc; i++ )
cannam@140:     {
cannam@140:         data->left_phase += (LEFT_FREQ / SAMPLE_RATE);
cannam@140:         if( data->left_phase > 1.0) data->left_phase -= 1.0;
cannam@140:         *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. )));
cannam@140: 
cannam@140:         data->right_phase += (RIGHT_FREQ / SAMPLE_RATE);
cannam@140:         if( data->right_phase > 1.0) data->right_phase -= 1.0;
cannam@140:         *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->right_phase * M_PI * 2. )));
cannam@140:     }
cannam@140:     /* zero remainder of final buffer */
cannam@140:     for( ; i<(int)framesPerBuffer; i++ )
cannam@140:     {
cannam@140:         *out++ = SAMPLE_ZERO; /* left */
cannam@140:         *out++ = SAMPLE_ZERO; /* right */
cannam@140:     }
cannam@140:     return finished;
cannam@140: }
cannam@140: /*******************************************************************/
cannam@140: int main(void);
cannam@140: int main(void)
cannam@140: {
cannam@140:     PaStream *stream;
cannam@140:     PaStreamParameters outputParameters;
cannam@140:     PaError err;
cannam@140:     paTestData data;
cannam@140:     int totalSamps;
cannam@140: 
cannam@140:     printf("PortAudio Test: output " FORMAT_NAME "\n");
cannam@140: 
cannam@140:     data.left_phase = data.right_phase = 0.0;
cannam@140:     data.framesToGo = totalSamps =  NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
cannam@140:     err = Pa_Initialize();
cannam@140:     if( err != paNoError ) goto error;
cannam@140: 
cannam@140: 
cannam@140:     outputParameters.device           = Pa_GetDefaultOutputDevice(); /* Default output device. */
cannam@140:     outputParameters.channelCount     = 2;                           /* Stereo output */
cannam@140:     outputParameters.sampleFormat     = TEST_FORMAT;                 /* Selected above. */
cannam@140:     outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency;
cannam@140:     outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@140:     err = Pa_OpenStream( &stream,
cannam@140:                          NULL,                  /* No input. */
cannam@140:                          &outputParameters,     /* As above. */
cannam@140:                          SAMPLE_RATE,
cannam@140:                          FRAMES_PER_BUFFER,
cannam@140:                          paClipOff,      /* we won't output out of range samples so don't bother clipping them */
cannam@140:                          patestCallback,
cannam@140:                          &data );
cannam@140:     if( err != paNoError ) goto error;
cannam@140: 
cannam@140:     err = Pa_StartStream( stream );
cannam@140:     if( err != paNoError ) goto error;
cannam@140: 
cannam@140:     printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS );
cannam@140: 
cannam@140:     while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100);
cannam@140:     if( err < 0 ) goto error;
cannam@140: 
cannam@140:     err = Pa_CloseStream( stream );
cannam@140:     if( err != paNoError ) goto error;
cannam@140:     Pa_Terminate();
cannam@140: 
cannam@140:     printf("PortAudio Test Finished: " FORMAT_NAME "\n");
cannam@140: 
cannam@140:     return err;
cannam@140: error:
cannam@140:     Pa_Terminate();
cannam@140:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@140:     fprintf( stderr, "Error number: %d\n", err );
cannam@140:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@140:     return err;
cannam@140: }