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1140b3ae83
AuroraOpenALSoft/Alc/backends/sndio.c
Chris Robinson 1140b3ae83 Support signed and unsigned 32-bit int output
2012-02-14 11:44:57 -08:00

370 lines
8.9 KiB
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/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "alMain.h"
#include "AL/al.h"
#include "AL/alc.h"
#include <sndio.h>
static const ALCchar sndio_device[] = "SndIO Default";
static void *sndio_handle;
#ifdef HAVE_DYNLOAD
#define MAKE_FUNC(x) static typeof(x) * p##x
MAKE_FUNC(sio_initpar);
MAKE_FUNC(sio_open);
MAKE_FUNC(sio_close);
MAKE_FUNC(sio_setpar);
MAKE_FUNC(sio_getpar);
MAKE_FUNC(sio_getcap);
MAKE_FUNC(sio_onmove);
MAKE_FUNC(sio_write);
MAKE_FUNC(sio_read);
MAKE_FUNC(sio_start);
MAKE_FUNC(sio_stop);
MAKE_FUNC(sio_nfds);
MAKE_FUNC(sio_pollfd);
MAKE_FUNC(sio_revents);
MAKE_FUNC(sio_eof);
MAKE_FUNC(sio_setvol);
MAKE_FUNC(sio_onvol);
#define sio_initpar psio_initpar
#define sio_open psio_open
#define sio_close psio_close
#define sio_setpar psio_setpar
#define sio_getpar psio_getpar
#define sio_getcap psio_getcap
#define sio_onmove psio_onmove
#define sio_write psio_write
#define sio_read psio_read
#define sio_start psio_start
#define sio_stop psio_stop
#define sio_nfds psio_nfds
#define sio_pollfd psio_pollfd
#define sio_revents psio_revents
#define sio_eof psio_eof
#define sio_setvol psio_setvol
#define sio_onvol psio_onvol
#endif
static ALCboolean sndio_load(void)
{
if(!sndio_handle)
{
#ifdef HAVE_DYNLOAD
sndio_handle = LoadLib("libsndio.so");
if(!sndio_handle)
return ALC_FALSE;
#define LOAD_FUNC(f) do { \
p##f = GetSymbol(sndio_handle, #f); \
if(p##f == NULL) { \
CloseLib(sndio_handle); \
sndio_handle = NULL; \
return ALC_FALSE; \
} \
} while(0)
LOAD_FUNC(sio_initpar);
LOAD_FUNC(sio_open);
LOAD_FUNC(sio_close);
LOAD_FUNC(sio_setpar);
LOAD_FUNC(sio_getpar);
LOAD_FUNC(sio_getcap);
LOAD_FUNC(sio_onmove);
LOAD_FUNC(sio_write);
LOAD_FUNC(sio_read);
LOAD_FUNC(sio_start);
LOAD_FUNC(sio_stop);
LOAD_FUNC(sio_nfds);
LOAD_FUNC(sio_pollfd);
LOAD_FUNC(sio_revents);
LOAD_FUNC(sio_eof);
LOAD_FUNC(sio_setvol);
LOAD_FUNC(sio_onvol);
#undef LOAD_FUNC
#else
sndio_handle = (void*)0xDEADBEEF;
#endif
}
return ALC_TRUE;
}
typedef struct {
struct sio_hdl *sndHandle;
ALvoid *mix_data;
ALsizei data_size;
volatile int killNow;
ALvoid *thread;
} sndio_data;
static ALuint sndio_proc(ALvoid *ptr)
{
ALCdevice *device = ptr;
sndio_data *data = device->ExtraData;
ALsizei frameSize;
size_t wrote;
SetRTPriority();
frameSize = FrameSizeFromDevFmt(device->FmtChans, device->FmtType);
while(!data->killNow && device->Connected)
{
ALsizei len = data->data_size;
ALubyte *WritePtr = data->mix_data;
aluMixData(device, WritePtr, len/frameSize);
while(len > 0 && !data->killNow)
{
wrote = sio_write(data->sndHandle, WritePtr, len);
if(wrote == 0)
{
ERR("sio_write failed\n");
aluHandleDisconnect(device);
break;
}
len -= wrote;
WritePtr += wrote;
}
}
return 0;
}
static ALCenum sndio_open_playback(ALCdevice *device, const ALCchar *deviceName)
{
sndio_data *data;
if(!deviceName)
deviceName = sndio_device;
else if(strcmp(deviceName, sndio_device) != 0)
return ALC_INVALID_VALUE;
data = calloc(1, sizeof(*data));
data->killNow = 0;
data->sndHandle = sio_open(NULL, SIO_PLAY, 0);
if(data->sndHandle == NULL)
{
free(data);
ERR("Could not open device\n");
return ALC_INVALID_VALUE;
}
device->szDeviceName = strdup(deviceName);
device->ExtraData = data;
return ALC_NO_ERROR;
}
static void sndio_close_playback(ALCdevice *device)
{
sndio_data *data = device->ExtraData;
sio_close(data->sndHandle);
free(data);
device->ExtraData = NULL;
}
static ALCboolean sndio_reset_playback(ALCdevice *device)
{
sndio_data *data = device->ExtraData;
struct sio_par par;
sio_initpar(&par);
par.rate = device->Frequency;
par.pchan = ((device->FmtChans != DevFmtMono) ? 2 : 1);
switch(device->FmtType)
{
case DevFmtByte:
par.bits = 8;
par.sig = 1;
break;
case DevFmtUByte:
par.bits = 8;
par.sig = 0;
break;
case DevFmtFloat:
case DevFmtShort:
par.bits = 16;
par.sig = 1;
break;
case DevFmtUShort:
par.bits = 16;
par.sig = 0;
break;
case DevFmtInt:
par.bits = 32;
par.sig = 1;
break;
case DevFmtUInt:
par.bits = 32;
par.sig = 0;
break;
}
par.le = SIO_LE_NATIVE;
par.round = device->UpdateSize;
par.appbufsz = device->UpdateSize * (device->NumUpdates-1);
if(!par.appbufsz) par.appbufsz = device->UpdateSize;
if(!sio_setpar(data->sndHandle, &par) || !sio_getpar(data->sndHandle, &par))
{
ERR("Failed to set device parameters\n");
return ALC_FALSE;
}
if(par.bits != par.bps*8)
{
ERR("Padded samples not supported (%u of %u bits)\n", par.bits, par.bps*8);
return ALC_FALSE;
}
device->Frequency = par.rate;
device->FmtChans = ((par.pchan==1) ? DevFmtMono : DevFmtStereo);
if(par.bits == 8 && par.sig == 1)
device->FmtType = DevFmtByte;
else if(par.bits == 8 && par.sig == 0)
device->FmtType = DevFmtUByte;
else if(par.bits == 16 && par.sig == 1)
device->FmtType = DevFmtShort;
else if(par.bits == 16 && par.sig == 0)
device->FmtType = DevFmtUShort;
else if(par.bits == 32 && par.sig == 1)
device->FmtType = DevFmtInt;
else if(par.bits == 32 && par.sig == 0)
device->FmtType = DevFmtUInt;
else
{
ERR("Unhandled sample format: %s %u-bit\n", (par.sig?"signed":"unsigned"), par.bits);
return ALC_FALSE;
}
device->UpdateSize = par.round;
device->NumUpdates = (par.bufsz/par.round) + 1;
SetDefaultChannelOrder(device);
if(!sio_start(data->sndHandle))
{
ERR("Error starting playback\n");
return ALC_FALSE;
}
data->data_size = device->UpdateSize * par.bps * par.pchan;
data->mix_data = calloc(1, data->data_size);
data->thread = StartThread(sndio_proc, device);
if(data->thread == NULL)
{
sio_stop(data->sndHandle);
free(data->mix_data);
data->mix_data = NULL;
return ALC_FALSE;
}
return ALC_TRUE;
}
static void sndio_stop_playback(ALCdevice *device)
{
sndio_data *data = device->ExtraData;
if(!data->thread)
return;
data->killNow = 1;
StopThread(data->thread);
data->thread = NULL;
data->killNow = 0;
if(!sio_stop(data->sndHandle))
ERR("Error stopping device\n");
free(data->mix_data);
data->mix_data = NULL;
}
static const BackendFuncs sndio_funcs = {
sndio_open_playback,
sndio_close_playback,
sndio_reset_playback,
sndio_stop_playback,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
ALCboolean alc_sndio_init(BackendFuncs *func_list)
{
if(!sndio_load())
return ALC_FALSE;
*func_list = sndio_funcs;
return ALC_TRUE;
}
void alc_sndio_deinit(void)
{
#ifdef HAVE_DYNLOAD
if(sndio_handle)
CloseLib(sndio_handle);
sndio_handle = NULL;
#endif
}
void alc_sndio_probe(enum DevProbe type)
{
switch(type)
{
case DEVICE_PROBE:
AppendDeviceList(sndio_device);
break;
case ALL_DEVICE_PROBE:
AppendAllDeviceList(sndio_device);
break;
case CAPTURE_DEVICE_PROBE:
break;
}
}
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