bool CCoreAudioDevice::SetHogStatus(bool hog)
{
if (!m_DeviceId)
return false;
pid_t holder = GetHogStatus();
pid_t me = getpid();
if (hog)
{
if (holder != me)
{
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: Setting 'hog' status on device 0x%04x", m_DeviceId);
OSStatus ret = AudioDeviceSetProperty(m_DeviceId, NULL, 0, false, kAudioDevicePropertyHogMode, sizeof(me), &me);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: Unable to set 'hog' status. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
return false;
}
pid_t holder = GetHogStatus();
if (holder != getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: Unable to set 'hog' status. another process (%x) has it.", holder);
return false;
}
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: Successfully set 'hog' status on device 0x%04x", m_DeviceId);
}
}
else
{
if (holder == me) // Currently Set
{
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: Releasing 'hog' status on device 0x%04x", m_DeviceId);
pid_t hogPid = -1;
OSStatus ret = AudioDeviceSetProperty(m_DeviceId, NULL, 0, false, kAudioDevicePropertyHogMode, sizeof(hogPid), &hogPid);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: Unable to release 'hog' status. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
return false;
}
pid_t holder = GetHogStatus();
if (holder == getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: failed to release. still hogging!");
return false;
}
}
}
return true;
}
bool CCoreAudioDevice::SetHogStatus(bool hog)
{
// According to Jeff Moore (Core Audio, Apple), Setting kAudioDevicePropertyHogMode
// is a toggle and the only way to tell if you do get hog mode is to compare
// the returned pid against getpid, if the match, you have hog mode, if not you don't.
if (!m_DeviceId)
return false;
AudioObjectPropertyAddress propertyAddress;
propertyAddress.mScope = kAudioDevicePropertyScopeOutput;
propertyAddress.mElement = 0;
propertyAddress.mSelector = kAudioDevicePropertyHogMode;
if (hog)
{
// Not already set
if (m_HogPid == -1)
{
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: "
"Setting 'hog' status on device 0x%04x", (unsigned int)m_DeviceId);
OSStatus ret = AudioObjectSetPropertyData(m_DeviceId, &propertyAddress, 0, NULL, sizeof(m_HogPid), &m_HogPid);
// even if setting hogmode was successfull our PID might not get written
// into m_HogPid (so it stays -1). Readback hogstatus for judging if we
// had success on getting hog status
m_HogPid = GetHogStatus();
if (ret || m_HogPid != getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: "
"Unable to set 'hog' status. Error = %s", GetError(ret).c_str());
return false;
}
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: "
"Successfully set 'hog' status on device 0x%04x", (unsigned int)m_DeviceId);
}
}
else
{
// Currently Set
if (m_HogPid > -1)
{
CLog::Log(LOGDEBUG, "CCoreAudioDevice::SetHogStatus: "
"Releasing 'hog' status on device 0x%04x", (unsigned int)m_DeviceId);
pid_t hogPid = -1;
OSStatus ret = AudioObjectSetPropertyData(m_DeviceId, &propertyAddress, 0, NULL, sizeof(hogPid), &hogPid);
if (ret || hogPid == getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: "
"Unable to release 'hog' status. Error = %s", GetError(ret).c_str());
return false;
}
// Reset internal state
m_HogPid = hogPid;
}
}
return true;
}
bool CCoreAudioDevice::SetHogStatus(bool hog)
{
// According to Jeff Moore (Core Audio, Apple), Setting kAudioDevicePropertyHogMode
// is a toggle and the only way to tell if you do get hog mode is to compare
// the returned pid against getpid, if the match, you have hog mode, if not you don't.
if (!m_DeviceId)
return false;
AudioObjectPropertyAddress propertyAddress;
propertyAddress.mScope = kAudioDevicePropertyScopeOutput;
propertyAddress.mElement = 0;
propertyAddress.mSelector = kAudioDevicePropertyHogMode;
if (hog)
{
// Not already set
if (m_HogPid == -1)
{
OSStatus ret = AudioObjectSetPropertyData(m_DeviceId, &propertyAddress, 0, NULL, sizeof(m_HogPid), &m_HogPid);
// even if setting hogmode was successfull our PID might not get written
// into m_HogPid (so it stays -1). Readback hogstatus for judging if we
// had success on getting hog status
// We do this only when AudioObjectSetPropertyData didn't set m_HogPid because
// it seems that in the other cases the GetHogStatus could return -1
// which would overwrite our valid m_HogPid again
// Man we should never touch this shit again ;)
if (m_HogPid == -1)
m_HogPid = GetHogStatus();
if (ret || m_HogPid != getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: "
"Unable to set 'hog' status. Error = %s", GetError(ret).c_str());
return false;
}
}
}
else
{
// Currently Set
if (m_HogPid > -1)
{
pid_t hogPid = -1;
OSStatus ret = AudioObjectSetPropertyData(m_DeviceId, &propertyAddress, 0, NULL, sizeof(hogPid), &hogPid);
if (ret || hogPid == getpid())
{
CLog::Log(LOGERROR, "CCoreAudioDevice::SetHogStatus: "
"Unable to release 'hog' status. Error = %s", GetError(ret).c_str());
return false;
}
// Reset internal state
m_HogPid = hogPid;
}
}
return true;
}