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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=====================================================================================//
#include "audio_pch.h"
#if defined( USE_SDL )
#include "snd_dev_sdl.h"
#endif
#ifdef OSX
#include "snd_dev_openal.h"
#include "snd_dev_mac_audioqueue.h"
ConVar snd_audioqueue( "snd_audioqueue", "1" );
#endif
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
bool snd_firsttime = true;
/*
* Global variables. Must be visible to window-procedure function
* so it can unlock and free the data block after it has been played.
*/
IAudioDevice *g_AudioDevice = NULL;
/*
==================
S_BlockSound
==================
*/
void S_BlockSound( void )
{
if ( !g_AudioDevice )
return;
g_AudioDevice->Pause();
}
/*
==================
S_UnblockSound
==================
*/
void S_UnblockSound( void )
{
if ( !g_AudioDevice )
return;
g_AudioDevice->UnPause();
}
/*
==================
AutoDetectInit
Try to find a sound device to mix for.
Returns a CAudioNULLDevice if nothing is found.
==================
*/
IAudioDevice *IAudioDevice::AutoDetectInit( bool waveOnly )
{
IAudioDevice *pDevice = NULL;
if ( IsPC() )
{
#if defined( WIN32 ) && !defined( USE_SDL )
if ( waveOnly )
{
pDevice = Audio_CreateWaveDevice();
if ( !pDevice )
goto NULLDEVICE;
}
if ( !pDevice )
{
if ( snd_firsttime )
{
pDevice = Audio_CreateDirectSoundDevice();
}
}
// if DirectSound didn't succeed in initializing, try to initialize
// waveOut sound, unless DirectSound failed because the hardware is
// already allocated (in which case the user has already chosen not
// to have sound)
// UNDONE: JAY: This doesn't test for the hardware being in use anymore, REVISIT
if ( !pDevice )
{
pDevice = Audio_CreateWaveDevice();
}
#elif defined(OSX)
if ( !CommandLine()->CheckParm( "-snd_openal" ) )
{
DevMsg( "Using AudioQueue Interface\n" );
pDevice = Audio_CreateMacAudioQueueDevice();
}
if ( !pDevice )
{
DevMsg( "Using OpenAL Interface\n" );
pDevice = Audio_CreateOpenALDevice(); // fall back to openAL if the audio queue fails
}
#elif defined( USE_SDL )
DevMsg( "Trying SDL Audio Interface\n" );
pDevice = Audio_CreateSDLAudioDevice();
#ifdef NEVER
// Jul 2012. mikesart. E-mail exchange with Ryan Gordon after figuring out that
// Audio_CreatePulseAudioDevice() wasn't working on Ubuntu 12.04 (lots of stuttering).
//
// > I installed libpulse-dev, rebuilt SDL, and now SDL is using pulse
// > audio and everything is working great. However I'm wondering if we
// > need to fall back to PulseAudio in our codebase if SDL is doing that
// > for us. I mean, is it worth me going through and debugging our Pulse
// > Audio path or should I just remove it?
//
// Remove it...it never worked well, and only remained in case there were
// concerns about relying on SDL. The SDL codepath is way easier to read,
// simpler to maintain, and handles all sorts of strange audio backends,
// including Pulse.
if ( !pDevice )
{
DevMsg( "Trying PulseAudio Interface\n" );
pDevice = Audio_CreatePulseAudioDevice(); // fall back to PulseAudio if SDL fails
}
#endif // NEVER
#else
#error
#endif
}
#if defined( _X360 )
else
{
pDevice = Audio_CreateXAudioDevice( true );
if ( pDevice )
{
// xaudio requires threaded mixing
S_EnableThreadedMixing( true );
}
}
#endif
#if defined( WIN32 ) && !defined( USE_SDL )
NULLDEVICE:
#endif
snd_firsttime = false;
if ( !pDevice )
{
if ( snd_firsttime )
DevMsg( "No sound device initialized\n" );
return Audio_GetNullDevice();
}
return pDevice;
}
/*
==============
SNDDMA_Shutdown
Reset the sound device for exiting
===============
*/
void SNDDMA_Shutdown( void )
{
if ( g_AudioDevice != Audio_GetNullDevice() )
{
if ( g_AudioDevice )
{
g_AudioDevice->Shutdown();
delete g_AudioDevice;
}
// the NULL device is always valid
g_AudioDevice = Audio_GetNullDevice();
}
}
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