summaryrefslogtreecommitdiff
path: root/3rdparty/portaudio/test/patest_prime.c
blob: e94331049009f6179b0f4656f79ecaf4a832ac1b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
/** @file patest_prime.c
    @ingroup test_src
    @brief Test stream priming mode.
    @author Ross Bencina http://www.audiomulch.com/~rossb
*/

/*
 * $Id$
 *
 * 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.
 *
 * 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.
 */

/*
 * The text above constitutes the entire PortAudio license; however,
 * the PortAudio community also makes the following non-binding requests:
 *
 * 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. It is also
 * requested that these non-binding requests be included along with the
 * license above.
 */

#include <stdio.h>
#include <math.h>
#include "portaudio.h"
#include "pa_util.h"

#define NUM_BEEPS           (3)
#define SAMPLE_RATE         (44100)
#define SAMPLE_PERIOD       (1.0/44100.0)
#define FRAMES_PER_BUFFER   (256)
#define BEEP_DURATION       (400)
#define IDLE_DURATION       (SAMPLE_RATE*2)      /* 2 seconds */
#define SLEEP_MSEC          (50)

#define STATE_BKG_IDLE      (0)
#define STATE_BKG_BEEPING   (1)

typedef struct
{
    float        leftPhase;
    float        rightPhase;
    int          state;
    int          beepCountdown;
    int          idleCountdown;
}
paTestData;

static void InitializeTestData( paTestData *testData )
{
    testData->leftPhase = 0;
    testData->rightPhase = 0;
    testData->state = STATE_BKG_BEEPING;
    testData->beepCountdown = BEEP_DURATION;
    testData->idleCountdown = IDLE_DURATION;
}

/* 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( const void *inputBuffer, void *outputBuffer,
                           unsigned long framesPerBuffer,
                           const PaStreamCallbackTimeInfo *timeInfo,
                           PaStreamCallbackFlags statusFlags, void *userData )
{
    /* Cast data passed through stream to our structure. */
    paTestData *data = (paTestData*)userData;
    float *out = (float*)outputBuffer;
    unsigned int i;
    int result = paContinue;

    /* suppress unused parameter warnings */
    (void) inputBuffer;
    (void) timeInfo;
    (void) statusFlags;

    for( i=0; i<framesPerBuffer; i++ )
    {
        switch( data->state )
        {
        case STATE_BKG_IDLE:
            *out++ = 0.0;  /* left */
            *out++ = 0.0;  /* right */
            --data->idleCountdown;

            if( data->idleCountdown <= 0 ) result = paComplete;
            break;

        case STATE_BKG_BEEPING:
            if( data->beepCountdown <= 0 )
            {
                data->state = STATE_BKG_IDLE;
                *out++ = 0.0;  /* left */
                *out++ = 0.0;  /* right */
            }
            else
            {
                /* Play sawtooth wave. */
                *out++ = data->leftPhase;  /* left */
                *out++ = data->rightPhase;  /* right */
                /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */
                data->leftPhase += 0.01f;
                /* When signal reaches top, drop back down. */
                if( data->leftPhase >= 1.0f ) data->leftPhase -= 2.0f;
                /* higher pitch so we can distinguish left and right. */
                data->rightPhase += 0.03f;
                if( data->rightPhase >= 1.0f ) data->rightPhase -= 2.0f;
            }
            --data->beepCountdown;
            break;
        }
    }

    return result;
}

/*******************************************************************/
static PaError DoTest( int flags )
{
    PaStream *stream;
    PaError    err = paNoError;
    paTestData data;
    PaStreamParameters outputParameters;

    InitializeTestData( &data );

    outputParameters.device = Pa_GetDefaultOutputDevice();
    if (outputParameters.device == paNoDevice) {
        fprintf(stderr,"Error: No default output device.\n");
        goto error;
    }
    outputParameters.channelCount = 2;
    outputParameters.hostApiSpecificStreamInfo = NULL;
    outputParameters.sampleFormat = paFloat32;
    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;

    /* Open an audio I/O stream. */
    err = Pa_OpenStream(
        &stream,
        NULL,                         /* no input */
        &outputParameters,
        SAMPLE_RATE,
        FRAMES_PER_BUFFER,            /* frames per buffer */
        paClipOff | flags,      /* 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("hear \"BEEP\"\n" );
    fflush(stdout);

    while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(SLEEP_MSEC);
    if( err < 0 ) goto error;

    err = Pa_StopStream( stream );
    if( err != paNoError ) goto error;

    err = Pa_CloseStream( stream );
    if( err != paNoError ) goto error;

    return err;
error:
    return err;
}

/*******************************************************************/
int main(void);
int main(void)
{
    PaError    err = paNoError;
    int        i;

    /* Initialize library before making any other calls. */
    err = Pa_Initialize();
    if( err != paNoError ) goto error;

    printf("PortAudio Test: Testing stream playback with no priming.\n");
    printf("PortAudio Test: you should see BEEP before you hear it.\n");
    printf("BEEP %d times.\n", NUM_BEEPS );

    for( i=0; i< NUM_BEEPS; ++i )
    {
        err = DoTest( 0 );
        if( err != paNoError )
            goto error;
    }

    printf("PortAudio Test: Testing stream playback with priming.\n");
    printf("PortAudio Test: you should see BEEP around the same time you hear it.\n");
    for( i=0; i< NUM_BEEPS; ++i )
    {
        err = DoTest( paPrimeOutputBuffersUsingStreamCallback );
        if( err != paNoError )
            goto error;
    }

    printf("Test finished.\n");

    Pa_Terminate();
    return err;
error:
    Pa_Terminate();
    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
    fprintf( stderr, "Error number: %d\n", err );
    fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
    return err;
}