--- /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