1 /*
2 * $Id: debug_dual.c,v 1.1 2006/06/10 21:30:56 dmazzoni Exp $
3 * debug_dual.c
4 * Try to open TWO streams on separate cards.
5 * Play a sine sweep using the Portable Audio api for several seconds.
6 * Hacked test for debugging PA.
7 *
8 * Author: Phil Burk <philburk@softsynth.com>
9 *
10 * This program uses the PortAudio Portable Audio Library.
11 * For more information see: http://www.portaudio.com
12 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining
15 * a copy of this software and associated documentation files
16 * (the "Software"), to deal in the Software without restriction,
17 * including without limitation the rights to use, copy, modify, merge,
18 * publish, distribute, sublicense, and/or sell copies of the Software,
19 * and to permit persons to whom the Software is furnished to do so,
20 * subject to the following conditions:
21 *
22 * The above copyright notice and this permission notice shall be
23 * included in all copies or substantial portions of the Software.
24 *
25 * Any person wishing to distribute modifications to the Software is
26 * requested to send the modifications to the original developer so that
27 * they can be incorporated into the canonical version.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
32 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
33 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
34 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 *
37 */
38 #include <stdio.h>
39 #include <math.h>
40 #include "portaudio.h"
41 #define DEV_ID_1 (13)
42 #define DEV_ID_2 (15)
43 #define NUM_SECONDS (8)
44 #define SLEEP_DUR (800)
45 #define SAMPLE_RATE (44100)
46 #define FRAMES_PER_BUFFER (256)
47 #if 0
48 #define MIN_LATENCY_MSEC (200)
49 #define NUM_BUFFERS ((MIN_LATENCY_MSEC * SAMPLE_RATE) / (FRAMES_PER_BUFFER * 1000))
50 #else
51 #define NUM_BUFFERS (0)
52 #endif
53 #define MIN_FREQ (100.0f)
54 #define MAX_FREQ (4000.0f)
55 #define FREQ_SCALAR (1.00002f)
56 #define CalcPhaseIncrement(freq) (freq/SAMPLE_RATE)
57 #ifndef M_PI
58 #define M_PI (3.14159265)
59 #endif
60 #define TABLE_SIZE (400)
61 typedef struct
62 {
63 float sine[TABLE_SIZE + 1]; // add one for guard point for interpolation
64 float phase_increment;
65 float left_phase;
66 float right_phase;
67 }
68 paTestData;
69 /* Convert phase between and 1.0 to sine value
70 * using linear interpolation.
71 */
72 float LookupSine( paTestData *data, float phase );
LookupSine(paTestData * data,float phase)73 float LookupSine( paTestData *data, float phase )
74 {
75 float fIndex = phase*TABLE_SIZE;
76 int index = (int) fIndex;
77 float fract = fIndex - index;
78 float lo = data->sine[index];
79 float hi = data->sine[index+1];
80 float val = lo + fract*(hi-lo);
81 return val;
82 }
83 /* This routine will be called by the PortAudio engine when audio is needed.
84 ** It may called at interrupt level on some machines so don't do anything
85 ** that could mess up the system like calling malloc() or free().
86 */
patestCallback(void * inputBuffer,void * outputBuffer,unsigned long framesPerBuffer,PaTimestamp outTime,void * userData)87 static int patestCallback( void *inputBuffer, void *outputBuffer,
88 unsigned long framesPerBuffer,
89 PaTimestamp outTime, void *userData )
90 {
91 paTestData *data = (paTestData*)userData;
92 float *out = (float*)outputBuffer;
93 unsigned long i;
94 int finished = 0;
95 (void) outTime; /* Prevent unused variable warnings. */
96 (void) inputBuffer;
97
98
99 for( i=0; i<framesPerBuffer; i++ )
100 {
101 *out++ = LookupSine(data, data->left_phase); /* left */
102 *out++ = LookupSine(data, data->right_phase); /* right */
103 data->left_phase += data->phase_increment;
104 if( data->left_phase >= 1.0f ) data->left_phase -= 1.0f;
105 data->right_phase += (data->phase_increment * 1.5f); /* fifth above */
106 if( data->right_phase >= 1.0f ) data->right_phase -= 1.0f;
107 /* sweep frequency then start over. */
108 data->phase_increment *= FREQ_SCALAR;
109 if( data->phase_increment > CalcPhaseIncrement(MAX_FREQ) ) data->phase_increment = CalcPhaseIncrement(MIN_FREQ);
110 }
111 return 0;
112 }
113
114 PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID,
115 paTestData *data );
116 /*******************************************************************/
117 int main(void);
main(void)118 int main(void)
119 {
120 PortAudioStream *stream1, *stream2;
121 PaError err;
122 paTestData DATA1, DATA2;
123 printf("PortAudio Test: DUAL sine sweep. ask for %d buffers\n", NUM_BUFFERS );
124 err = Pa_Initialize();
125 if( err != paNoError ) goto error;
126 err = TestStart( &stream1, DEV_ID_1, &DATA1 );
127 if( err != paNoError ) goto error;
128 err = TestStart( &stream2, DEV_ID_2, &DATA2 );
129 if( err != paNoError ) goto error;
130 printf("Hit ENTER\n");
131 getchar();
132 err = Pa_StopStream( stream1 );
133 if( err != paNoError ) goto error;
134 err = Pa_StopStream( stream2 );
135 if( err != paNoError ) goto error;
136 Pa_Terminate();
137 printf("Test finished.\n");
138 return err;
139 error:
140 Pa_Terminate();
141 fprintf( stderr, "An error occured while using the portaudio stream\n" );
142 fprintf( stderr, "Error number: %d\n", err );
143 fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
144 return err;
145 }
TestStart(PortAudioStream ** streamPtr,PaDeviceID devID,paTestData * data)146 PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID, paTestData *data )
147 {
148 PortAudioStream *stream;
149 PaError err;
150 int i;
151 /* initialise sinusoidal wavetable */
152 for( i=0; i<TABLE_SIZE; i++ )
153 {
154 data->sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
155 }
156 data->sine[TABLE_SIZE] = data->sine[0]; // set guard point
157 data->left_phase = data->right_phase = 0.0;
158 data->phase_increment = CalcPhaseIncrement(MIN_FREQ);
159 printf("PortAudio Test: output device = %d\n", devID );
160 err = Pa_OpenStream(
161 &stream,
162 paNoDevice,
163 0, /* no input */
164 paFloat32, /* 32 bit floating point input */
165 NULL,
166 devID,
167 2, /* stereo output */
168 paFloat32, /* 32 bit floating point output */
169 NULL,
170 SAMPLE_RATE,
171 FRAMES_PER_BUFFER,
172 NUM_BUFFERS, /* number of buffers, if zero then use default minimum */
173 paClipOff|paDitherOff, /* we won't output out of range samples so don't bother clipping them */
174 patestCallback,
175 data );
176 if( err != paNoError ) goto error;
177 err = Pa_StartStream( stream );
178 if( err != paNoError ) goto error;
179 *streamPtr = stream;
180 return 0;
181 error:
182 return err;
183 }
184