static int glwtHandleInotifyEvent(struct epoll_event *ep_event)
{
(void)ep_event;
char buffer[256];
while(1)
{
int length = read(glwt.linux_input.inotify_fd, buffer, sizeof(buffer));
if(length<=0)
break;
int pos = 0;
while(pos<length)
{
struct inotify_event *event = (struct inotify_event*)(buffer+pos);
if(strncmp(event->name, "event", 5) == 0)
{
char name[20];
snprintf(name, sizeof(name), "/dev/input/%s", event->name);
// devices can become "openable" after either being
// created or having their rights changed so we have to
// listen to both events. But we also have to make sure
// to not insert them twice if we can open them after
// both events.
if(event->mask & (IN_CREATE | IN_ATTRIB))
{
if(find_device_by_name(name) == 0)
if(add_device(name) != 0)
goto error;
}
}
pos += sizeof(struct inotify_event) + event->len;
}
}
return 0;
error:
return -1;
}
static int
prepare_audiounit(_THIS, const char *devname, int iscapture,
const AudioStreamBasicDescription * strdesc)
{
OSStatus result = noErr;
AURenderCallbackStruct callback;
#if MACOSX_COREAUDIO
ComponentDescription desc;
Component comp = NULL;
#else
AudioComponentDescription desc;
AudioComponent comp = NULL;
#endif
const AudioUnitElement output_bus = 0;
const AudioUnitElement input_bus = 1;
const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
kAudioUnitScope_Input);
#if MACOSX_COREAUDIO
if (!find_device_by_name(this, devname, iscapture)) {
SDL_SetError("Couldn't find requested CoreAudio device");
return 0;
}
#endif
SDL_zero(desc);
desc.componentType = kAudioUnitType_Output;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
#if MACOSX_COREAUDIO
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
comp = FindNextComponent(NULL, &desc);
#else
desc.componentSubType = kAudioUnitSubType_RemoteIO; /* !!! FIXME: ? */
comp = AudioComponentFindNext(NULL, &desc);
#endif
if (comp == NULL) {
SDL_SetError("Couldn't find requested CoreAudio component");
return 0;
}
/* Open & initialize the audio unit */
#if MACOSX_COREAUDIO
result = OpenAComponent(comp, &this->hidden->audioUnit);
CHECK_RESULT("OpenAComponent");
#else
/*
AudioComponentInstanceNew only available on iPhone OS 2.0 and Mac OS X 10.6
We can't use OpenAComponent on iPhone because it is not present
*/
result = AudioComponentInstanceNew(comp, &this->hidden->audioUnit);
CHECK_RESULT("AudioComponentInstanceNew");
#endif
this->hidden->audioUnitOpened = 1;
#if MACOSX_COREAUDIO
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0,
&this->hidden->deviceID,
sizeof(AudioDeviceID));
CHECK_RESULT
("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
#endif
/* Set the data format of the audio unit. */
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_StreamFormat,
scope, bus, strdesc, sizeof(*strdesc));
CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
/* Set the audio callback */
SDL_memset(&callback, 0, sizeof(AURenderCallbackStruct));
callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
callback.inputProcRefCon = this;
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_SetRenderCallback,
scope, bus, &callback, sizeof(callback));
CHECK_RESULT
("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)");
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);
/* Allocate a sample buffer */
this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
result = AudioUnitInitialize(this->hidden->audioUnit);
CHECK_RESULT("AudioUnitInitialize");
/* Finally, start processing of the audio unit */
result = AudioOutputUnitStart(this->hidden->audioUnit);
CHECK_RESULT("AudioOutputUnitStart");
/* We're running! */
return 1;
}
static int
prepare_audiounit(_THIS, const char *devname, int iscapture,
const AudioStreamBasicDescription * strdesc)
{
OSStatus result = noErr;
AURenderCallbackStruct callback;
ComponentDescription desc;
Component comp = NULL;
const AudioUnitElement output_bus = 0;
const AudioUnitElement input_bus = 1;
const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
kAudioUnitScope_Input);
if (!find_device_by_name(this, devname, iscapture)) {
SDL_SetError("Couldn't find requested CoreAudio device");
return 0;
}
SDL_memset(&desc, '\0', sizeof(ComponentDescription));
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
comp = FindNextComponent(NULL, &desc);
if (comp == NULL) {
SDL_SetError("Couldn't find requested CoreAudio component");
return 0;
}
/* Open & initialize the audio unit */
result = OpenAComponent(comp, &this->hidden->audioUnit);
CHECK_RESULT("OpenAComponent");
this->hidden->audioUnitOpened = 1;
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0,
&this->hidden->deviceID,
sizeof(AudioDeviceID));
CHECK_RESULT
("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
/* Set the data format of the audio unit. */
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_StreamFormat,
scope, bus, strdesc, sizeof(*strdesc));
CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
/* Set the audio callback */
SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
callback.inputProcRefCon = this;
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_SetRenderCallback,
scope, bus, &callback, sizeof(callback));
CHECK_RESULT
("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)");
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);
/* Allocate a sample buffer */
this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
result = AudioUnitInitialize(this->hidden->audioUnit);
CHECK_RESULT("AudioUnitInitialize");
/* Finally, start processing of the audio unit */
result = AudioOutputUnitStart(this->hidden->audioUnit);
CHECK_RESULT("AudioOutputUnitStart");
/* We're running! */
return 1;
}
