+++ /dev/null
-/* MikMod sound library
- (c) 1998, 1999 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.
-*/
-
-/*==============================================================================
-
- $Id$
-
- Driver for SoundBlaster/Pro/16/AWE32 under DOS
-
-==============================================================================*/
-
-/*
-
- Written by Andrew Zabolotny <bit@eltech.ru>
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#ifdef DRV_SB
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#include "mikmod_internals.h"
-
-#include "dossb.h"
-
-static void SB_CommandLine(const CHAR *cmdline)
-{
- char *ptr, *end;
-
- if ((ptr=MD_GetAtom("port",cmdline,0)) != NULL) {
- sb.port = strtol(ptr, &end, 16);
- MikMod_free(ptr);
- }
- if ((ptr=MD_GetAtom("irq",cmdline,0)) != NULL) {
- sb.irq = strtol(ptr, &end, 10);
- MikMod_free(ptr);
- }
- if ((ptr=MD_GetAtom("dma",cmdline,0)) != NULL) {
- sb.dma8 = strtol(ptr, &end, 10);
- MikMod_free(ptr);
- }
- if ((ptr=MD_GetAtom("hidma",cmdline,0)) != NULL) {
- sb.dma16 = strtol(ptr, &end, 10);
- MikMod_free(ptr);
- }
-}
-
-static BOOL SB_IsThere(void)
-{
- return sb_detect();
-}
-
-static int SB_Init(void)
-{
- if (!sb_open()) {
- _mm_errno = MMERR_INVALID_DEVICE;
- return 1;
- }
-
- /* Adjust md_mode according to sound card capabilities */
- if (!(sb.caps & SBMODE_STEREO))
- md_mode &= ~DMODE_STEREO;
- if (!(sb.caps & SBMODE_16BITS))
- md_mode &= ~DMODE_16BITS;
-
- if (md_mixfreq < 4000)
- md_mixfreq = 4000;
- if (md_mode & DMODE_STEREO) {
- if (md_mixfreq > sb.maxfreq_stereo)
- md_mixfreq = sb.maxfreq_stereo;
- } else {
- if (md_mixfreq > sb.maxfreq_mono)
- md_mixfreq = sb.maxfreq_mono;
- }
-
- return VC_Init();
-}
-
-static void SB_Exit(void)
-{
- VC_Exit();
- sb_close();
-}
-
-/* The last buffer byte filled with sound */
-static unsigned int buff_tail = 0;
-
-static void SB_Callback(void)
-{
- unsigned int dma_size, dma_pos;
- ULONG (*mixer)(SBYTE *buf, ULONG todo);
-
- sb_query_dma(&dma_size, &dma_pos);
- /* There isn't much sense in filling less than 256 bytes */
- dma_pos &= ~255;
-
- /* If nothing to mix, quit */
- if (buff_tail == dma_pos)
- return;
-
- if (Player_Paused_internal())
- mixer = VC_SilenceBytes;
- else
- mixer = VC_WriteBytes;
-
- /* If DMA pointer still didn't wrapped around ... */
- if (dma_pos > buff_tail) {
- buff_tail += mixer ((SBYTE *)(sb.dma_buff->linear + buff_tail), dma_pos - buff_tail);
- /* If we arrived right to the DMA buffer end, jump to the beginning */
- if (buff_tail >= dma_size)
- buff_tail = 0;
- } else {
- /* If wrapped around, fill first to the end of buffer */
- mixer ((SBYTE *)(sb.dma_buff->linear + buff_tail), dma_size - buff_tail);
- /* Now fill from buffer beginning to current DMA pointer */
- buff_tail = mixer ((SBYTE *)sb.dma_buff->linear, dma_pos);
- }
-}
-
-static void SB_Update(void)
-{
- /* Do nothing: the real update is done during SB interrupts */
-}
-
-static int SB_PlayStart (void)
-{
- if (VC_PlayStart())
- return 1;
-
- /* Enable speaker output */
- sb_output(TRUE);
-
- /* Set our routine to be called during SB IRQs */
- buff_tail = 0;
- sb.timer_callback = SB_Callback;
-
- /* Start cyclic DMA transfer */
- if (!sb_start_dma(((md_mode & DMODE_16BITS) ? SBMODE_16BITS | SBMODE_SIGNED : 0) |
- ((md_mode & DMODE_STEREO) ? SBMODE_STEREO : 0), md_mixfreq))
- {
- _mm_errno = MMERR_DOSSB_STARTDMA;
- return 1;
- }
-
- return 0;
-}
-
-static int SB_Reset(void)
-{
- sb_reset();
- VC_Exit();
- return VC_Init();
-}
-
-static void SB_PlayStop(void)
-{
- sb.timer_callback = NULL;
- sb_output(FALSE);
- sb_stop_dma();
- VC_PlayStop();
-}
-
-MDRIVER drv_sb =
-{
- NULL,
- "Sound Blaster",
- "Sound Blaster Orig/2.0/Pro/16 v1.0",
- 0, 255,
- "sb",
- "port:c:220,230,240,250,260,270,280,32C,530,604,E80,F40,220:Sound Blaster base I/O port\n"
- "irq:c:2,3,5,7,10,5:Sound Blaster IRQ\n"
- "dma:c:0,1,3,1:Sound Blaster 8 bit DMA channel\n"
- "hidma:c:5,6,7,5:Sound Blaster 16 bit DMA channel (SB16/AWE32 only)\n",
-
- SB_CommandLine,
- SB_IsThere,
- VC_SampleLoad,
- VC_SampleUnload,
- VC_SampleSpace,
- VC_SampleLength,
- SB_Init,
- SB_Exit,
- SB_Reset,
- VC_SetNumVoices,
- SB_PlayStart,
- SB_PlayStop,
- SB_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 /* DRV_SB */
-
-#include "mikmod_internals.h"
-MISSING(drv_sb);
-
-#endif
-
-/* ex:set ts=4: */
projects / dosdemo / blobdiff