X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=libs%2Fmikmod%2Fdrivers%2Fdrv_wss.c;fp=libs%2Fmikmod%2Fdrivers%2Fdrv_wss.c;h=a89d5ecb4b0572bcf811072d3d8fec080c413421;hp=0000000000000000000000000000000000000000;hb=cf94899f4f4d8535074db6421245b973d2fcde8c;hpb=8024ae981f39d370af5cceb3cb97f62820b0a120

diff --git a/libs/mikmod/drivers/drv_wss.c b/libs/mikmod/drivers/drv_wss.c
new file mode 100644
index 0000000..a89d5ec
--- /dev/null
+++ b/libs/mikmod/drivers/drv_wss.c
@@ -0,0 +1,217 @@
+/*	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 Windows Sound System under DOS
+
+==============================================================================*/
+
+/*
+
+	Written by Andrew Zabolotny <bit@eltech.ru>
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef DRV_WSS
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#include "mikmod_internals.h"
+
+#include "doswss.h"
+
+static void WSS_CommandLine(const CHAR *cmdline)
+{
+	char *ptr, *end;
+
+	if ((ptr=MD_GetAtom("port",cmdline,0)) != NULL) {
+		wss.port = strtol(ptr, &end, 16);
+		MikMod_free(ptr);
+	}
+	if ((ptr=MD_GetAtom("irq",cmdline,0)) != NULL) {
+		wss.irq = strtol(ptr, &end, 10);
+		MikMod_free(ptr);
+	}
+	if ((ptr=MD_GetAtom("dma",cmdline,0)) != NULL) {
+		wss.dma = strtol(ptr, &end, 10);
+		MikMod_free(ptr);
+	}
+}
+
+static BOOL WSS_IsThere(void)
+{
+	return wss_detect();
+}
+
+static int WSS_Init(void)
+{
+	if (!wss_open()) {
+		_mm_errno = MMERR_INVALID_DEVICE;
+		return 1;
+	}
+
+	/* Adjust mixing frequency according to card capabilities */
+	md_mixfreq = wss_adjust_freq(md_mixfreq);
+
+	return VC_Init();
+}
+
+static void WSS_Exit(void)
+{
+	VC_Exit();
+	wss_close();
+}
+
+/* The last buffer byte filled with sound */
+static unsigned int buff_tail = 0;
+
+static void WSS_Callback(void)
+{
+	unsigned int dma_size, dma_pos;
+	ULONG (*mixer)(SBYTE *buf, ULONG todo);
+
+	wss_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 *)(wss.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 *)(wss.dma_buff->linear + buff_tail), dma_size - buff_tail);
+		/* Now fill from buffer beginning to current DMA pointer */
+		buff_tail = mixer ((SBYTE *)wss.dma_buff->linear, dma_pos);
+	}
+}
+
+static void WSS_Update(void)
+{
+	/* Do nothing: the real update is done during SB interrupts */
+}
+
+static int WSS_PlayStart(void)
+{
+	if (VC_PlayStart())
+		return 1;
+
+	/* Set our routine to be called during WSS IRQs */
+	buff_tail = 0;
+	wss.timer_callback = WSS_Callback;
+
+	/* Start cyclic DMA transfer */
+	if (!wss_start_dma(((md_mode & DMODE_16BITS) ? WSSMODE_16BITS | WSSMODE_SIGNED : 0) |
+		((md_mode & DMODE_STEREO) ? WSSMODE_STEREO : 0), md_mixfreq))
+	{
+		_mm_errno = MMERR_DOSWSS_STARTDMA;
+		return 1;
+	}
+
+	/* Enable speaker output */
+	wss_output(TRUE);
+
+	return 0;
+}
+
+static int WSS_Reset(void)
+{
+	wss_reset();
+	VC_Exit();
+	return VC_Init();
+}
+
+static void WSS_PlayStop(void)
+{
+	wss.timer_callback = NULL;
+	wss_output(FALSE);
+	wss_stop_dma();
+	VC_PlayStop();
+}
+
+MDRIVER drv_wss =
+{
+	NULL,
+	"Windows Sound System",
+	"Windows Sound System (CS423*,ESS*) v1.0",
+	0, 255,
+	"wss",
+	"port:c:32C,530,604,E80,F40,530:Windows Sound System base I/O port\n"
+	"irq:c:2,3,5,7,10,5:Windows Sound System IRQ\n"
+	"dma:c:0,1,3,0:Windows Sound System DMA channel\n",
+
+	WSS_CommandLine,
+	WSS_IsThere,
+	VC_SampleLoad,
+	VC_SampleUnload,
+	VC_SampleSpace,
+	VC_SampleLength,
+	WSS_Init,
+	WSS_Exit,
+	WSS_Reset,
+	VC_SetNumVoices,
+	WSS_PlayStart,
+	WSS_PlayStop,
+	WSS_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 /* ifdef DRV_WSS */
+
+#include "mikmod_internals.h"
+MISSING(drv_wss);
+
+#endif
+
+/* ex:set ts=4: */