/* MikMod sound library

(c) 1998, 1999, 2000 Miodrag Vallat and others - see file AUTHORS for

complete list.

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 program 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.

*/

/*==============================================================================

$Id: drv_AF.c,v 1.1.1.1 2004/06/01 12:16:17 raph Exp $

Driver for output on AF audio server.

==============================================================================*/

/*

Written by Roine Gustafsson <e93_rog@e.kth.se>

Portability:

Unixes running Digital AudioFile library, available from

ftp://crl.dec.com/pub/DEC/AF

Usage:

Run the audio server (Aaxp&, Amsb&, whatever)

Set environment variable AUDIOFILE to something like 'mymachine:0'.

Remember, stereo is default! See commandline switches.

I have a version which uses 2 computers for stereo.

Contact me if you want it.

*/

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "mikmod_internals.h"

#ifdef DRV_AF

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <stdlib.h>

#include <AF/AFlib.h>

/* Global variables */

static SBYTE *audiobuffer=NULL;

static int AFFragmentSize;

static AFAudioConn *AFaud=NULL;

static ATime AFtime;

static AC AFac;

static AFDeviceDescriptor *AFdesc;

static CHAR *soundbox=NULL;

static void AF_CommandLine(CHAR *cmdline)

{

CHAR *machine=MD_GetAtom("machine",cmdline,0);

if(machine) {

if(soundbox) free(soundbox);

soundbox=machine;

}

}

static BOOL AF_IsThere(void)

{

AFaud=AFOpenAudioConn(soundbox);

if (AFaud) {

AFCloseAudioConn(AFaud);

AFaud=NULL;

return 1;

} else

return 0;

}

static int AF_Init(void)

{

unsigned long mask;

AFSetACAttributes attributes;

int srate;

ADevice device;

int n;

if (!(AFaud=AFOpenAudioConn(soundbox))) {

_mm_errno=MMERR_OPENING_AUDIO;

return 1;

}

/* Search for a suitable device */

device=-1;

for (n=0;n<AFaud->ndevices;n++) {

AFdesc=AAudioDeviceDescriptor(AFaud,n);

if ((AFdesc->playNchannels==2)&&(md_mode&DMODE_STEREO)) {

device=n;

break;

}

if ((AFdesc->playNchannels==1)&&!(md_mode&DMODE_STEREO)) {

device=n;

break;

}

}

if (device==-1) {

_mm_errno=MMERR_AF_AUDIO_PORT;

return 1;

}

attributes.preempt=Mix;

attributes.start_timeout=0;

attributes.end_silence=0;

/* in case of an 8bit device, the AF converts the 16 bit data to 8 bit */

attributes.type=LIN16;

attributes.channels=(md_mode&DMODE_STEREO)?Stereo:Mono;

mask=ACPreemption|ACEncodingType|ACStartTimeout|ACEndSilence|ACChannels;

AFac=AFCreateAC(AFaud,device,mask,&attributes);

srate=AFac->device->playSampleFreq;

md_mode|=DMODE_16BITS; /* This driver only handles 16bits */

AFFragmentSize=(srate/40)*8; /* Update 5 times/sec */

md_mixfreq=srate; /* set mixing freq */

if (md_mode&DMODE_STEREO) {

if (!(audiobuffer=(SBYTE*)_mm_malloc(2*2*AFFragmentSize)))

return 1;

} else {

if (!(audiobuffer=(SBYTE*)_mm_malloc(2*AFFragmentSize)))

return 1;

}

return VC_Init();

}

static int AF_PlayStart(void)

{

AFtime=AFGetTime(AFac);

return VC_PlayStart();

}

static void AF_Exit(void)

{

VC_Exit();

_mm_free(audiobuffer);

if (AFaud) {

AFCloseAudioConn(AFaud);

AFaud=NULL;

}

}

static void AF_Update(void)

{

ULONG done;

done=VC_WriteBytes(audiobuffer,AFFragmentSize);

if (md_mode&DMODE_STEREO) {

AFPlaySamples(AFac,AFtime,done,(unsigned char*)audiobuffer);

AFtime+=done/4;

/* while (AFGetTime(AFac)<AFtime-1000); */

} else {

AFPlaySamples(AFac,AFtime,done,(unsigned char*)audiobuffer);

AFtime+=done/2;

/* while (AFGetTime(AFac)<AFtime-1000); */

}

}

MIKMODAPI MDRIVER drv_AF={

NULL,

"AF driver",

"AudioFile driver v1.3",

0,255,

"audiofile",

AF_CommandLine,

AF_IsThere,

VC_SampleLoad,

VC_SampleUnload,

VC_SampleSpace,

VC_SampleLength,

AF_Init,

AF_Exit,

NULL,

VC_SetNumVoices,

AF_PlayStart,

VC_PlayStop,

AF_Update,

NULL,

VC_VoiceSetVolume,

VC_VoiceGetVolume,

VC_VoiceSetFrequency,

VC_VoiceGetFrequency,

VC_VoiceSetPanning,

VC_VoiceGetPanning,

VC_VoicePlay,

VC_VoiceStop,

VC_VoiceStopped,

VC_VoiceGetPosition,

VC_VoiceRealVolume

};

#else

MISSING(drv_AF);

#endif

/* ex:set ts=4: */