home *** CD-ROM | disk | FTP | other *** search
- /* MikMod sound library
- (c) 1998 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- /*==============================================================================
-
- $Id: drv_AF.c,v 1.17 1998/12/07 06:01:42 miod Exp $
-
- Mikmod driver for output on AF audio server.
-
- ==============================================================================*/
-
- /*
-
- Written by Roine Gustafsson <e93_rog@e.kth.se> Oct 25, 1995
-
- 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
-
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #ifdef HAVE_MALLOC_H
- #include <malloc.h>
- #endif
- #include <stdlib.h>
-
- #include <AF/AFlib.h>
-
- #include <mikmod_internals.h>
-
- /* Global variables */
-
- static SBYTE *audiobuffer=NULL;
- static int AFFragmentSize;
- static AFAudioConn *AFaud=NULL;
- static ATime AFtime;
- static AC AFac;
- static AFDeviceDescriptor *AFdesc;
-
- static BOOL AF_IsThere(void)
- {
- /* I'll think of a detection routine ... sometime */
- return 1;
- }
-
- static BOOL AF_Init(void)
- {
- unsigned long mask;
- AFSetACAttributes attributes;
- int srate;
- ADevice device;
- int n;
-
- AFaud=AFOpenAudioConn("");
- if (!AFaud) {
- _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 BOOL AF_PlayStart(void)
- {
- AFtime=AFGetTime(AFac);
- return VC_PlayStart();
- }
-
- static void AF_Exit(void)
- {
- VC_Exit();
- if (audiobuffer) {
- free(audiobuffer);
- audiobuffer=NULL;
- }
- if (AFaud) {
- AFCloseAudioConn(AFaud);
- AFaud=NULL;
- }
- }
-
- static BOOL AF_Reset(void)
- {
- AF_Exit();
- return AF_Init();
- }
-
- 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); */
- }
- }
-
- MDRIVER drv_AF={
- NULL,
- "AF driver",
- "AudioFile driver v1.3",
- 0,255,
- AF_IsThere,
- VC_SampleLoad,
- VC_SampleUnload,
- VC_SampleSpace,
- VC_SampleLength,
- AF_Init,
- AF_Exit,
- AF_Reset,
- VC_SetNumVoices,
- AF_PlayStart,
- VC_PlayStop,
- AF_Update,
- VC_VoiceSetVolume,
- VC_VoiceSetFrequency,
- VC_VoiceSetPanning,
- VC_VoicePlay,
- VC_VoiceStop,
- VC_VoiceStopped,
- VC_VoiceGetPosition,
- VC_VoiceRealVolume
- };
-