static bool setupParameters(const char *hostAPI, const char *inputDevice,
const char *outputDevice, PaStreamParameters *inputParams,
PaStreamParameters *outputParams)
{
PaHostApiIndex hostAPIIndex;
if (!findHostAPIInfo(hostAPI, &hostAPIIndex)) {
return false;
}
const PaDeviceInfo *inputDeviceInfo = findDeviceInfo(hostAPIIndex,
inputDevice, &inputParams->device);
if (!inputDeviceInfo) {
return false;
}
const PaDeviceInfo *outputDeviceInfo = findDeviceInfo(hostAPIIndex,
outputDevice, &outputParams->device);
if (!outputDeviceInfo) {
return false;
}
/* TODO do all host APIs/devices support this? */
PaSampleFormat sampleFormat = paFloat32 | paNonInterleaved;
inputParams->sampleFormat = sampleFormat;
outputParams->sampleFormat = sampleFormat;
/* TODO support stereo and user-defined channel configuration */
inputParams->channelCount = 1;
outputParams->channelCount = 1;
inputParams->suggestedLatency = inputDeviceInfo->defaultLowInputLatency;
outputParams->suggestedLatency = outputDeviceInfo->defaultLowOutputLatency;
inputParams->hostApiSpecificStreamInfo = NULL;
outputParams->hostApiSpecificStreamInfo = NULL;
return true;
}
static bool setupParameters(const char *hostAPI, const char *inputDevice,
const char *outputDevice, PaStreamParameters *inputParams,
PaStreamParameters *outputParams, double latency)
{
PaHostApiIndex hostAPIIndex;
if (!findHostAPIInfo(hostAPI, &hostAPIIndex)) {
return false;
}
const PaDeviceInfo *inputDeviceInfo = findDeviceInfo(hostAPIIndex,
inputDevice, &inputParams->device, true);
if (!inputDeviceInfo) {
return false;
}
const PaDeviceInfo *outputDeviceInfo = findDeviceInfo(hostAPIIndex,
outputDevice, &outputParams->device, false);
if (!outputDeviceInfo) {
return false;
}
/* TODO do all host APIs/devices support this? */
PaSampleFormat sampleFormat = paFloat32 | paNonInterleaved;
inputParams->sampleFormat = sampleFormat;
outputParams->sampleFormat = sampleFormat;
/* TODO support user-defined channel configuration */
if (inputDeviceInfo->maxInputChannels == 0 ||
outputDeviceInfo->maxOutputChannels == 0) {
return false;
}
inputParams->channelCount = inputDeviceInfo->maxInputChannels > 1 ? 2 : 1;
outputParams->channelCount = outputDeviceInfo->maxOutputChannels;
inputParams->suggestedLatency = latency;
outputParams->suggestedLatency = latency;
inputParams->hostApiSpecificStreamInfo = NULL;
outputParams->hostApiSpecificStreamInfo = NULL;
return true;
}