--- /dev/null
+/*
+ * $Id$
+ * Convert tagged values.
+ *
+ * Author: Phil Burk <philburk@softsynth.com>
+ *
+ * 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 <stdio.h>
+#include <math.h>
+#include "portaudio.h"
+#define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
+//#define OUTPUT_DEVICE (11)
+#define NUM_SECONDS (8)
+#define SLEEP_DUR (800)
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (256)
+
+#define NUM_BUFFERS (0)
+
+typedef struct
+{
+ unsigned int framesToGo;
+}
+paTestData;
+/* 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;
+ short *out = (short*)outputBuffer;
+ int i;
+ int finished = 0;
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+
+ if( data->framesToGo < framesPerBuffer ) finished = 1;
+
+ for( i=0; i<framesPerBuffer; i++ )
+ {
+ *out++ = 0x0000 + i; /* left */
+ *out++ = 0x1000 + i; /* right */
+ }
+ return finished;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ PortAudioStream *stream;
+ PaError err;
+ paTestData data;
+ int i;
+ int totalSamps;
+ printf("PortAudio Test: output debug values\n" );
+ data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+ printf("totalSamps = %d\n", totalSamps );
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+ printf("PortAudio Test: output device = %d\n", OUTPUT_DEVICE );
+
+ err = Pa_OpenStream(
+ &stream,
+ paNoDevice,
+ 0, /* no input */
+ paFloat32, /* 32 bit floating point input */
+ NULL,
+ OUTPUT_DEVICE,
+ 2, /* stereo output */
+ paInt16, /* 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;
+ printf("Is callback being called?\n");
+ for( i=0; i<((NUM_SECONDS+1)*1000); i+=SLEEP_DUR )
+ {
+ printf("data.framesToGo = %d\n", data.framesToGo ); fflush(stdout);
+ Pa_Sleep( SLEEP_DUR );
+ }
+ /* Stop sound until ENTER hit. */
+ printf("Call Pa_StopStream()\n");
+ err = Pa_StopStream( stream );
+ 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;
+}
--- /dev/null
+/*
+ * $Id$
+ * Test Dither calculations.
+ *
+ * Author: Phil Burk http://www.softsynth.com
+ *
+ * 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 <stdio.h>
+#include <math.h>
+#include "portaudio.h"
+#include "pa_host.h"
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ long max,min;
+ int i;
+
+ for( i=0; i<10000; i++ )
+ {
+ long dither = PaConvert_TriangularDither();
+ // printf("dither = 0x%08X\n", dither );
+ if( dither < min ) min = dither;
+ else if( dither > max ) max = dither;
+ }
+ printf("min = 0x%08X = %d, max = 0x%08X = %d\n", min, min, max, max );
+}
--- /dev/null
+/*
+ * $Id$
+ * Play a different sine wave on each channels,
+ * using the Portable Audio api.
+ * Allos amplitude to be set interactively.
+ *
+ * Author: Phil Burk http://www.softsynth.com
+ *
+ * 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 <stdio.h>
+#include <math.h>
+#include "portaudio.h"
+
+#define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (256)
+#define FREQ_INCR (300.0 / SAMPLE_RATE)
+#define MAX_CHANNELS (64)
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+
+typedef struct
+{
+ int numChannels;
+ double phases[MAX_CHANNELS];
+ float amplitude;
+}
+paTestData;
+
+/* 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;
+ int frameIndex, channelIndex;
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+
+ for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
+ {
+ for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ )
+ {
+ /* Output sine wave on every channel. */
+ *out++ = (float) ( data->amplitude * sin(data->phases[channelIndex]) );
+
+ /* Play each channel at a higher frequency. */
+ data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex);
+ if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI);
+ }
+ }
+
+ return 0;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ char pad[256];
+ PortAudioStream *stream;
+ PaError err;
+ const PaDeviceInfo *pdi;
+ paTestData data = {0};
+ printf("PortAudio Test: output sine wave on each channel.\n" );
+
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+
+ pdi = Pa_GetDeviceInfo( OUTPUT_DEVICE );
+ data.numChannels = pdi->maxOutputChannels;
+ if( data.numChannels > MAX_CHANNELS ) data.numChannels = MAX_CHANNELS;
+ printf("Number of Channels = %d\n", data.numChannels );
+ data.amplitude = 1.0;
+
+ err = Pa_OpenStream(
+ &stream,
+ paNoDevice, /* default input device */
+ 0, /* no input */
+ paFloat32, /* 32 bit floating point input */
+ NULL,
+ OUTPUT_DEVICE,
+ data.numChannels,
+ paFloat32, /* 32 bit floating point output */
+ NULL,
+ SAMPLE_RATE,
+ FRAMES_PER_BUFFER, /* frames per buffer */
+ 0, /* number of buffers, if zero then use default minimum */
+ paClipOff, /* 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;
+
+ do
+ {
+ printf("Current amplitude = %f\n", data.amplitude );
+ printf("Enter new amplitude or 'q' to quit.\n");
+ fflush(stdout);
+ gets( pad );
+ if( pad[0] != 'q' )
+ {
+ // I tried to use atof but it seems to be broken on Mac OS X 10.1
+ float amp;
+ sscanf( pad, "%f", & );
+ data.amplitude = amp;
+ }
+ } while( pad[0] != 'q' );
+
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error;
+
+ Pa_CloseStream( stream );
+ 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;
+}
--- /dev/null
+/*
+ * $Id$
+ * patest_sine_formats.c
+ * Play a sine wave using the Portable Audio api for several seconds.
+ * Test various data formats.
+ *
+ * Author: Phil Burk
+ *
+ * This program uses the PortAudio Portable Audio Library.
+ * For more information see: http://www.audiomulch.com/portaudio/
+ * 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 <stdio.h>
+#include <math.h>
+#include "portaudio.h"
+
+#define NUM_SECONDS (10)
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (256)
+
+#define LEFT_FREQ (SAMPLE_RATE/512.0) /* So we hit 1.0 */
+#define RIGHT_FREQ (500.0)
+
+#define AMPLITUDE (1.0)
+
+/* Select ONE format for testing. */
+#define TEST_UINT8 (1)
+#define TEST_INT8 (0)
+#define TEST_INT16 (0)
+#define TEST_FLOAT32 (0)
+
+#if TEST_UINT8
+#define TEST_FORMAT paUInt8
+typedef unsigned char SAMPLE_t;
+#define SAMPLE_ZERO (0x80)
+#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x)))
+#define FORMAT_NAME "Unsigned 8 Bit"
+
+#elif TEST_INT8
+#define TEST_FORMAT paInt8
+typedef char SAMPLE_t;
+#define SAMPLE_ZERO (0)
+#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x)))
+#define FORMAT_NAME "Signed 8 Bit"
+
+#elif TEST_INT16
+#define TEST_FORMAT paInt16
+typedef short SAMPLE_t;
+#define SAMPLE_ZERO (0)
+#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(32767 * (x)))
+#define FORMAT_NAME "Signed 16 Bit"
+
+#elif TEST_FLOAT32
+#define TEST_FORMAT paFloat32
+typedef float SAMPLE_t;
+#define SAMPLE_ZERO (0.0)
+#define DOUBLE_TO_SAMPLE(x) ((SAMPLE_t)(x))
+#define FORMAT_NAME "Float 32 Bit"
+#endif
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+
+
+typedef struct
+{
+ double left_phase;
+ double right_phase;
+ unsigned int framesToGo;
+}
+paTestData;
+/* 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;
+ SAMPLE_t *out = (SAMPLE_t *)outputBuffer;
+ SAMPLE_t sample;
+ int i;
+ int framesToCalc;
+ int finished = 0;
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+
+ if( data->framesToGo < framesPerBuffer )
+ {
+ framesToCalc = data->framesToGo;
+ data->framesToGo = 0;
+ finished = 1;
+ }
+ else
+ {
+ framesToCalc = framesPerBuffer;
+ data->framesToGo -= framesPerBuffer;
+ }
+
+ for( i=0; i<framesToCalc; i++ )
+ {
+ data->left_phase += (LEFT_FREQ / SAMPLE_RATE);
+ if( data->left_phase > 1.0) data->left_phase -= 1.0;
+ sample = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. ))); /**/
+ *out++ = sample;
+/* *out++ = sample; /**/
+/* *out++ = 0; /**/
+
+ data->right_phase += (RIGHT_FREQ / SAMPLE_RATE);
+ if( data->right_phase > 1.0) data->right_phase -= 1.0;
+ *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->right_phase * M_PI * 2. ))); /**/
+/* *out++ = 0; /* */
+ }
+ /* zero remainder of final buffer */
+ for( ; i<(int)framesPerBuffer; i++ )
+ {
+ *out++ = SAMPLE_ZERO; /* left */
+ *out++ = SAMPLE_ZERO; /* right */
+ }
+ return finished;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ PortAudioStream *stream;
+ PaError err;
+ paTestData data;
+ int totalSamps;
+
+ printf("PortAudio Test: output " FORMAT_NAME "\n");
+
+
+ data.left_phase = data.right_phase = 0.0;
+ data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+
+ err = Pa_OpenStream(
+ &stream,
+ paNoDevice,/* default input device */
+ 0, /* no input */
+ TEST_FORMAT,
+ NULL,
+ Pa_GetDefaultOutputDeviceID(), /* default output device */
+ 2, /* stereo output */
+ TEST_FORMAT,
+ NULL,
+ SAMPLE_RATE,
+ FRAMES_PER_BUFFER,
+ 0, /* number of buffers, if zero then use default minimum */
+ paClipOff, /* 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;
+
+ printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS );
+ while( Pa_StreamActive( stream ) ) Pa_Sleep(10);
+
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto error;
+ Pa_Terminate();
+
+ printf("PortAudio Test Finished: " FORMAT_NAME "\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;
+}
projects / portaudio / commitdiff