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Update portaudio to upstream r1885

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This commit is contained in:
lllucius
2013-02-27 01:33:15 +00:00
parent a8c69337c2
commit 123ec235c9
233 changed files with 36854 additions and 12370 deletions
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68
lib-src/portaudio-v19/test/patest_leftright.c
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@@ -9,7 +9,7 @@
@author Phil Burk <philburk@softsynth.com>
*/
/*
* $Id: patest_leftright.c,v 1.8 2008-12-31 15:38:36 richardash1981 Exp $
* $Id: patest_leftright.c 1609 2011-02-27 00:06:07Z philburk $
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.portaudio.com
@@ -57,15 +57,17 @@
#define M_PI (3.14159265)
#endif
#define TABLE_SIZE (200)
#define BALANCE_DELTA (0.001)
typedef struct
{
float sine[TABLE_SIZE];
int left_phase;
int right_phase;
int toggle;
int countDown;
}
paTestData;
float targetBalance; // 0.0 = left, 1.0 = right
float currentBalance;
} 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().
@@ -86,30 +88,25 @@ static int patestCallback( const void *inputBuffer,
for( i=0; i<framesPerBuffer; i++ )
{
if( data->toggle )
{
*out++ = data->sine[data->left_phase]; /* left */
*out++ = 0; /* right */
}
else
{
*out++ = 0; /* left */
*out++ = data->sine[data->right_phase]; /* right */
}
// Smoothly pan between left and right.
if( data->currentBalance < data->targetBalance )
{
data->currentBalance += BALANCE_DELTA;
}
else if( data->currentBalance > data->targetBalance )
{
data->currentBalance -= BALANCE_DELTA;
}
// Apply left/right balance.
*out++ = data->sine[data->left_phase] * (1.0f - data->currentBalance); /* left */
*out++ = data->sine[data->right_phase] * data->currentBalance; /* right */
data->left_phase += 1;
if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
}
if( data->countDown < 0 )
{
data->countDown = SAMPLE_RATE;
data->toggle = !data->toggle;
}
data->countDown -= framesPerBuffer;
return finished;
}
@@ -121,9 +118,7 @@ int main(void)
PaStreamParameters outputParameters;
PaError err;
paTestData data;
int i;
int timeout;
int i;
printf("Play different tone sine waves that alternate between left and right channel.\n");
printf("The low tone should be on the left channel.\n");
@@ -132,8 +127,9 @@ int main(void)
{
data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
}
data.left_phase = data.right_phase = data.toggle = 0;
data.countDown = SAMPLE_RATE;
data.left_phase = data.right_phase = 0;
data.currentBalance = 0.0;
data.targetBalance = 0.0;
err = Pa_Initialize();
if( err != paNoError ) goto error;
@@ -162,12 +158,16 @@ int main(void)
if( err != paNoError ) goto error;
printf("Play for several seconds.\n");
timeout = NUM_SECONDS * 4;
while( timeout > 0 )
{
Pa_Sleep( 300 ); /*(Irix very much likes sleeps <= 1000 ms.)*/
timeout -= 1;
}
for( i=0; i<4; i++ )
{
printf("Hear low sound on left side.\n");
data.targetBalance = 0.01;
Pa_Sleep( 1000 );
printf("Hear high sound on right side.\n");
data.targetBalance = 0.99;
Pa_Sleep( 1000 );
}
err = Pa_StopStream( stream );
if( err != paNoError ) goto error;