fluid_audio_driver_t *
new_fluid_portaudio_driver (fluid_settings_t *settings, fluid_synth_t *synth)
{
fluid_portaudio_driver_t *dev = NULL;
PaStreamParameters outputParams;
char *device = NULL;
double sample_rate;
int period_size;
PaError err;
dev = FLUID_NEW (fluid_portaudio_driver_t);
if (dev == NULL)
{
FLUID_LOG (FLUID_ERR, "Out of memory");
return NULL;
}
err = Pa_Initialize ();
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error initializing PortAudio driver: %s",
Pa_GetErrorText (err));
FLUID_FREE (dev);
return NULL;
}
FLUID_MEMSET (dev, 0, sizeof (fluid_portaudio_driver_t));
dev->synth = synth;
fluid_settings_getint (settings, "audio.period-size", &period_size);
fluid_settings_getnum (settings, "synth.sample-rate", &sample_rate);
fluid_settings_dupstr(settings, "audio.portaudio.device", &device); /* ++ alloc device name */
bzero (&outputParams, sizeof (outputParams));
outputParams.channelCount = 2;
outputParams.suggestedLatency = (PaTime)period_size / sample_rate;
/* Locate the device if specified */
if (strcmp (device, PORTAUDIO_DEFAULT_DEVICE) != 0)
{
const PaDeviceInfo *deviceInfo;
int numDevices;
int i;
numDevices = Pa_GetDeviceCount ();
if (numDevices < 0)
{
FLUID_LOG (FLUID_ERR, "PortAudio returned unexpected device count %d", numDevices);
goto error_recovery;
}
for (i = 0; i < numDevices; i++)
{
deviceInfo = Pa_GetDeviceInfo (i);
if (strcmp (device, deviceInfo->name) == 0)
{
outputParams.device = i;
break;
}
}
if (i == numDevices)
{
FLUID_LOG (FLUID_ERR, "PortAudio device '%s' was not found", device);
goto error_recovery;
}
}
else outputParams.device = Pa_GetDefaultOutputDevice();
if (fluid_settings_str_equal (settings, "audio.sample-format", "16bits"))
{
outputParams.sampleFormat = paInt16;
dev->read = fluid_synth_write_s16;
}
else if (fluid_settings_str_equal (settings, "audio.sample-format", "float"))
{
outputParams.sampleFormat = paFloat32;
dev->read = fluid_synth_write_float;
}
else
{
FLUID_LOG (FLUID_ERR, "Unknown sample format");
goto error_recovery;
}
/* PortAudio section */
/* Open an audio I/O stream. */
err = Pa_OpenStream (&dev->stream,
NULL, /* Input parameters */
&outputParams,
sample_rate,
period_size,
paNoFlag,
fluid_portaudio_run,
dev);
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error opening PortAudio stream: %s",
Pa_GetErrorText (err));
goto error_recovery;
}
err = Pa_StartStream (dev->stream);
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error starting PortAudio stream: %s",
Pa_GetErrorText (err));
goto error_recovery;
}
if (device) FLUID_FREE (device); /* -- free device name */
return (fluid_audio_driver_t *)dev;
error_recovery:
if (device) FLUID_FREE (device); /* -- free device name */
delete_fluid_portaudio_driver ((fluid_audio_driver_t *)dev);
return NULL;
}
fluid_audio_driver_t *
new_fluid_portaudio_driver2 (fluid_settings_t *settings, fluid_audio_func_t func, void* data)
{
fluid_portaudio_driver_t *dev = NULL;
PaStreamParameters outputParams;
char *device = NULL;
double sample_rate;
int period_size;
PaError err;
int numOutputs = 2;
dev = FLUID_NEW (fluid_portaudio_driver_t);
if (dev == NULL)
{
FLUID_LOG (FLUID_ERR, "Out of memory");
return NULL;
}
err = Pa_Initialize ();
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error initializing PortAudio driver: %s",
Pa_GetErrorText (err));
FLUID_FREE (dev);
return NULL;
}
FLUID_MEMSET (dev, 0, sizeof (fluid_portaudio_driver_t));
dev->data = data;
dev->callback = func;
bzero (&outputParams, sizeof (outputParams));
fluid_settings_getint (settings, "audio.period-size", &period_size);
fluid_settings_getnum (settings, "synth.sample-rate", &sample_rate);
fluid_settings_dupstr(settings, "audio.portaudio.device", &device); /* ++ alloc device name */
/* Locate the device if specified */
if (strcmp (device, PORTAUDIO_DEFAULT_DEVICE) != 0)
{
const PaDeviceInfo *deviceInfo;
int numDevices;
int i;
numDevices = Pa_GetDeviceCount ();
if (numDevices < 0)
{
FLUID_LOG (FLUID_ERR, "PortAudio returned unexpected device count %d", numDevices);
goto error_recovery;
}
for (i = 0; i < numDevices; i++)
{
deviceInfo = Pa_GetDeviceInfo (i);
if (strcmp (device, deviceInfo->name) == 0)
{
outputParams.device = i;
numOutputs = deviceInfo->maxOutputChannels;
break;
}
}
if (i == numDevices)
{
FLUID_LOG (FLUID_ERR, "PortAudio device '%s' was not found", device);
goto error_recovery;
}
}
else outputParams.device = Pa_GetDefaultOutputDevice();
fluid_settings_getint(settings, "audio.portaudio.channelL", &(dev->chanL));
fluid_settings_getint(settings, "audio.portaudio.channelR", &(dev->chanR));
dev->chansOpen = 1 + ((dev->chanL > dev->chanR) ? dev->chanL : dev->chanR);
if (dev->chansOpen > numOutputs) {
// error
FLUID_LOG (FLUID_ERR, "One specified channel is greater than the maximum number of channels: L=%d, R=%d, max=%d\n", dev->chanL, dev->chanR, numOutputs-1);
goto error_recovery;
}
dev->buffer_size = period_size;
dev->buffers[0] = FLUID_ARRAY(float, dev->buffer_size);
dev->buffers[1] = FLUID_ARRAY(float, dev->buffer_size);
outputParams.channelCount = dev->chansOpen;
outputParams.suggestedLatency = (PaTime)period_size / sample_rate;
// force float format
outputParams.sampleFormat = paFloat32;
/* PortAudio section */
/* Open an audio I/O stream. */
err = Pa_OpenStream (&dev->stream,
NULL, /* Input parameters */
&outputParams,
sample_rate,
period_size,
paNoFlag,
fluid_portaudio_run,
dev);
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error opening PortAudio stream: %s",
Pa_GetErrorText (err));
goto error_recovery;
}
err = Pa_StartStream (dev->stream);
if (err != paNoError)
{
FLUID_LOG (FLUID_ERR, "Error starting PortAudio stream: %s",
Pa_GetErrorText (err));
goto error_recovery;
}
if (device) FLUID_FREE (device); /* -- free device name */
return (fluid_audio_driver_t *)dev;
error_recovery:
if (device) FLUID_FREE (device); /* -- free device name */
delete_fluid_portaudio_driver ((fluid_audio_driver_t *)dev);
return NULL;
}
