static ALuint ALSANoMMapProc(ALvoid *ptr)
{
ALCdevice *pDevice = (ALCdevice*)ptr;
alsa_data *data = (alsa_data*)pDevice->ExtraData;
snd_pcm_sframes_t avail;
char *WritePtr;
SetRTPriority();
while(!data->killNow)
{
int state = verify_state(data->pcmHandle);
if(state < 0)
{
AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state));
aluHandleDisconnect(pDevice);
break;
}
WritePtr = data->buffer;
avail = data->size / psnd_pcm_frames_to_bytes(data->pcmHandle, 1);
aluMixData(pDevice, WritePtr, avail);
while(avail > 0)
{
int ret = psnd_pcm_writei(data->pcmHandle, WritePtr, avail);
switch (ret)
{
case -EAGAIN:
continue;
case -ESTRPIPE:
case -EPIPE:
case -EINTR:
ret = psnd_pcm_recover(data->pcmHandle, ret, 1);
if(ret >= 0)
psnd_pcm_prepare(data->pcmHandle);
break;
default:
if (ret >= 0)
{
WritePtr += psnd_pcm_frames_to_bytes(data->pcmHandle, ret);
avail -= ret;
}
break;
}
if (ret < 0)
{
ret = psnd_pcm_prepare(data->pcmHandle);
if(ret < 0)
break;
}
}
}
return 0;
}
static int xrun_recovery(snd_pcm_t *handle, int err)
{
if(err == -EINTR || err == -EPIPE || err == -ESTRPIPE)
{
err = psnd_pcm_recover(handle, err, 1);
if(err >= 0)
err = psnd_pcm_prepare(handle);
if(err < 0)
AL_PRINT("recover failed: %s\n", psnd_strerror(err));
}
return err;
}
static unsigned int ALSA_RW_GetDMAPos (soundcardinfo_t *sc)
{
int frames;
frames = psnd_pcm_avail_update(sc->handle);
if (frames < 0)
{
psnd_pcm_start (sc->handle);
psnd_pcm_recover(sc->handle, frames, true);
frames = psnd_pcm_avail_update(sc->handle);
}
if (frames >= 0)
{
sc->sn.samplepos = (sc->snd_sent + frames) * sc->sn.numchannels;
}
return sc->sn.samplepos;
}
static ALCuint alsa_available_samples(ALCdevice *Device)
{
alsa_data *data = (alsa_data*)Device->ExtraData;
snd_pcm_sframes_t avail;
avail = (Device->Connected ? psnd_pcm_avail_update(data->pcmHandle) : 0);
if(avail < 0)
{
AL_PRINT("avail update failed: %s\n", psnd_strerror(avail));
if((avail=psnd_pcm_recover(data->pcmHandle, avail, 1)) >= 0 &&
(avail=psnd_pcm_prepare(data->pcmHandle)) >= 0)
{
if(data->doCapture)
avail = psnd_pcm_start(data->pcmHandle);
if(avail >= 0)
avail = psnd_pcm_avail_update(data->pcmHandle);
}
if(avail < 0)
{
AL_PRINT("restore error: %s\n", psnd_strerror(avail));
aluHandleDisconnect(Device);
}
}
while(avail > 0)
{
snd_pcm_sframes_t amt;
amt = psnd_pcm_bytes_to_frames(data->pcmHandle, data->size);
if(avail < amt) amt = avail;
amt = psnd_pcm_readi(data->pcmHandle, data->buffer, amt);
if(amt < 0)
{
AL_PRINT("read error: %s\n", psnd_strerror(amt));
if(amt == -EAGAIN)
continue;
if((amt=psnd_pcm_recover(data->pcmHandle, amt, 1)) >= 0 &&
(amt=psnd_pcm_prepare(data->pcmHandle)) >= 0)
{
if(data->doCapture)
amt = psnd_pcm_start(data->pcmHandle);
if(amt >= 0)
amt = psnd_pcm_avail_update(data->pcmHandle);
}
if(amt < 0)
{
AL_PRINT("restore error: %s\n", psnd_strerror(amt));
aluHandleDisconnect(Device);
break;
}
avail = amt;
continue;
}
WriteRingBuffer(data->ring, data->buffer, amt);
avail -= amt;
}
return RingBufferSize(data->ring);
}
