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authorsanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
committersanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
commit37c97e345d12f95dde44e1d1a4c2f2aadd4615bc (patch)
treee1bb25bc855883062bdd7847ff2c04290f71c840 /portaudio/test/patest_prime.c
parent5634c7b04da619669f2f29f6798c03982be05180 (diff)
add initial structure
Diffstat (limited to 'portaudio/test/patest_prime.c')
-rw-r--r--portaudio/test/patest_prime.c234
1 files changed, 234 insertions, 0 deletions
diff --git a/portaudio/test/patest_prime.c b/portaudio/test/patest_prime.c
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+/** @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;
+}