/* * $Id: debug_dual.c,v 1.1 2006/06/10 21:30:56 dmazzoni Exp $ * debug_dual.c * Try to open TWO streams on separate cards. * Play a sine sweep using the Portable Audio api for several seconds. * Hacked test for debugging PA. * * Author: Phil Burk * * This program uses the PortAudio Portable Audio Library. * For more information see: http://www.portaudio.com * Copyright (c) 1999-2000 Ross Bencina and Phil Burk * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files * (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * Any person wishing to distribute modifications to the Software is * requested to send the modifications to the original developer so that * they can be incorporated into the canonical version. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include #include #include "portaudio.h" #define DEV_ID_1 (13) #define DEV_ID_2 (15) #define NUM_SECONDS (8) #define SLEEP_DUR (800) #define SAMPLE_RATE (44100) #define FRAMES_PER_BUFFER (256) #if 0 #define MIN_LATENCY_MSEC (200) #define NUM_BUFFERS ((MIN_LATENCY_MSEC * SAMPLE_RATE) / (FRAMES_PER_BUFFER * 1000)) #else #define NUM_BUFFERS (0) #endif #define MIN_FREQ (100.0f) #define MAX_FREQ (4000.0f) #define FREQ_SCALAR (1.00002f) #define CalcPhaseIncrement(freq) (freq/SAMPLE_RATE) #ifndef M_PI #define M_PI (3.14159265) #endif #define TABLE_SIZE (400) typedef struct { float sine[TABLE_SIZE + 1]; // add one for guard point for interpolation float phase_increment; float left_phase; float right_phase; } paTestData; /* Convert phase between and 1.0 to sine value * using linear interpolation. */ float LookupSine( paTestData *data, float phase ); float LookupSine( paTestData *data, float phase ) { float fIndex = phase*TABLE_SIZE; int index = (int) fIndex; float fract = fIndex - index; float lo = data->sine[index]; float hi = data->sine[index+1]; float val = lo + fract*(hi-lo); return val; } /* This routine will be called by the PortAudio engine when audio is needed. ** It may called at interrupt level on some machines so don't do anything ** that could mess up the system like calling malloc() or free(). */ static int patestCallback( void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, PaTimestamp outTime, void *userData ) { paTestData *data = (paTestData*)userData; float *out = (float*)outputBuffer; unsigned long i; int finished = 0; (void) outTime; /* Prevent unused variable warnings. */ (void) inputBuffer; for( i=0; ileft_phase); /* left */ *out++ = LookupSine(data, data->right_phase); /* right */ data->left_phase += data->phase_increment; if( data->left_phase >= 1.0f ) data->left_phase -= 1.0f; data->right_phase += (data->phase_increment * 1.5f); /* fifth above */ if( data->right_phase >= 1.0f ) data->right_phase -= 1.0f; /* sweep frequency then start over. */ data->phase_increment *= FREQ_SCALAR; if( data->phase_increment > CalcPhaseIncrement(MAX_FREQ) ) data->phase_increment = CalcPhaseIncrement(MIN_FREQ); } return 0; } PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID, paTestData *data ); /*******************************************************************/ int main(void); int main(void) { PortAudioStream *stream1, *stream2; PaError err; paTestData DATA1, DATA2; printf("PortAudio Test: DUAL sine sweep. ask for %d buffers\n", NUM_BUFFERS ); err = Pa_Initialize(); if( err != paNoError ) goto error; err = TestStart( &stream1, DEV_ID_1, &DATA1 ); if( err != paNoError ) goto error; err = TestStart( &stream2, DEV_ID_2, &DATA2 ); if( err != paNoError ) goto error; printf("Hit ENTER\n"); getchar(); err = Pa_StopStream( stream1 ); if( err != paNoError ) goto error; err = Pa_StopStream( stream2 ); if( err != paNoError ) goto error; Pa_Terminate(); printf("Test finished.\n"); return err; error: Pa_Terminate(); fprintf( stderr, "An error occured while using the portaudio stream\n" ); fprintf( stderr, "Error number: %d\n", err ); fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); return err; } PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID, paTestData *data ) { PortAudioStream *stream; PaError err; int i; /* initialise sinusoidal wavetable */ for( i=0; isine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); } data->sine[TABLE_SIZE] = data->sine[0]; // set guard point data->left_phase = data->right_phase = 0.0; data->phase_increment = CalcPhaseIncrement(MIN_FREQ); printf("PortAudio Test: output device = %d\n", devID ); err = Pa_OpenStream( &stream, paNoDevice, 0, /* no input */ paFloat32, /* 32 bit floating point input */ NULL, devID, 2, /* stereo output */ paFloat32, /* 32 bit floating point output */ NULL, SAMPLE_RATE, FRAMES_PER_BUFFER, NUM_BUFFERS, /* number of buffers, if zero then use default minimum */ paClipOff|paDitherOff, /* we won't output out of range samples so don't bother clipping them */ patestCallback, data ); if( err != paNoError ) goto error; err = Pa_StartStream( stream ); if( err != paNoError ) goto error; *streamPtr = stream; return 0; error: return err; }