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EventThread: Pause OpenAL device when entering background 

This requires ALC_SOFT_pause_device to be present. It stops the
alc thread from needlessly consuming CPU resources.
This commit is contained in:
Jonas Kulla 2015-01-15 08:07:22 +01:00
parent 7c6a2b2c62
commit c92df0ce3a
1 changed files with 39 additions and 0 deletions
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39
src/eventthread.cpp
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@ -28,13 +28,45 @@
#include <SDL_thread.h>
#include <SDL_touch.h>
#include <alext.h>
#include "sharedstate.h"
#include "graphics.h"
#include "settingsmenu.h"
#include "al-util.h"
#include "debugwriter.h"
#include <string.h>
typedef void (ALC_APIENTRY *LPALCDEVICEPAUSESOFT) (ALCdevice *device);
typedef void (ALC_APIENTRY *LPALCDEVICERESUMESOFT) (ALCdevice *device);
#define AL_DEVICE_PAUSE_FUN \
AL_FUN(DevicePause, LPALCDEVICEPAUSESOFT) \
AL_FUN(DeviceResume, LPALCDEVICERESUMESOFT)
struct ALCFunctions
{
#define AL_FUN(name, type) type name;
AL_DEVICE_PAUSE_FUN
#undef AL_FUN
} static alc;
static void
initALCFunctions(ALCdevice *alcDev)
{
if (!strstr(alcGetString(alcDev, ALC_EXTENSIONS), "ALC_SOFT_pause_device"))
return;
Debug() << "ALC_SOFT_pause_device present";
#define AL_FUN(name, type) alc. name = (type) alcGetProcAddress(alcDev, "alc" #name "SOFT");
AL_DEVICE_PAUSE_FUN;
#undef AL_FUN
}
#define HAVE_ALC_DEVICE_PAUSE alc.DevicePause
uint8_t EventThread::keyStates[];
EventThread::JoyState EventThread::joyState;
EventThread::MouseState EventThread::mouseState;
@ -76,6 +108,7 @@ void EventThread::process(RGSSThreadData &rtData)
SDL_Window *win = rtData.window;
UnidirMessage<Vec2i> &windowSizeMsg = rtData.windowSizeMsg;
initALCFunctions(rtData.alcDev);
SDL_SetEventFilter(eventFilter, &rtData);
fullscreen = rtData.config.fullscreen;
@ -422,6 +455,9 @@ int EventThread::eventFilter(void *data, SDL_Event *event)
case SDL_APP_WILLENTERBACKGROUND :
Debug() << "SDL_APP_WILLENTERBACKGROUND";
if (HAVE_ALC_DEVICE_PAUSE)
alc.DevicePause(rtData.alcDev);
rtData.syncPoint.haltThreads();
return 0;
@ -437,6 +473,9 @@ int EventThread::eventFilter(void *data, SDL_Event *event)
case SDL_APP_DIDENTERFOREGROUND :
Debug() << "SDL_APP_DIDENTERFOREGROUND";
if (HAVE_ALC_DEVICE_PAUSE)
alc.DeviceResume(rtData.alcDev);
rtData.syncPoint.resumeThreads();
return 0;