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raze/polymer/eduke32/source/jaudiolib/multivoc.c
terminx 169e0c824b Give most of the gamevar stuff its own object 
git-svn-id: https://svn.eduke32.com/eduke32@398 1a8010ca-5511-0410-912e-c29ae57300e0
2006-12-10 06:49:01 +00:00

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/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Modifications for JonoF's port by Jonathon Fowler (jonof@edgenetwk.com)
*/
/**********************************************************************
module: MULTIVOC.C
author: James R. Dose
date: December 20, 1993
Routines to provide multichannel digitized sound playback for
Sound Blaster compatible sound cards.
(c) Copyright 1993 James R. Dose. All Rights Reserved.
**********************************************************************/
#include <stdlib.h>
#include <string.h>
#ifndef _MSC_VER
#include <unistd.h>
#endif
#ifdef _WIN32
#include "dsoundout.h"
#else
#include "dsl.h"
#endif
#include "compat.h"
#include "baselayer.h"
#include "usrhooks.h"
#include "linklist.h"
#include "pitch.h"
#include "multivoc.h"
#include "_multivc.h"
#define STEREO 1
#define SIXTEEN_BIT 2
#define MONO_8BIT 0
#define STEREO_8BIT (STEREO)
#define MONO_16BIT (SIXTEEN_BIT)
#define STEREO_16BIT (STEREO | SIXTEEN_BIT)
#define IS_QUIET(ptr) ((void *)(ptr) == (void *)&MV_VolumeTable[ 0 ])
static int MV_ReverbLevel;
static int MV_ReverbDelay;
static VOLUME16 *MV_ReverbTable = NULL;
//static signed short MV_VolumeTable[ MV_MaxVolume + 1 ][ 256 ];
static signed short MV_VolumeTable[ 63 + 1 ][ 256 ];
//static Pan MV_PanTable[ MV_NumPanPositions ][ MV_MaxVolume + 1 ];
static Pan MV_PanTable[ MV_NumPanPositions ][ 63 + 1 ];
static int MV_Installed = FALSE;
static int MV_SoundCard = -1;
static int MV_TotalVolume = MV_MaxTotalVolume;
static int MV_MaxVoices = 1;
static int MV_Recording;
static int MV_BufferSize = 0;
static int MV_BufferLength;
static int MV_NumberOfBuffers = NumberOfBuffers;
static int MV_MixMode = MONO_8BIT;
static int MV_Channels = 1;
static int MV_Bits = 8;
static int MV_Silence = SILENCE_8BIT;
static int MV_SwapLeftRight = FALSE;
static int MV_RequestedMixRate;
static int MV_MixRate;
static int MV_BuffShift;
static int MV_TotalMemory;
static int MV_BufferEmpty[ NumberOfBuffers ];
char *MV_MixBuffer[ NumberOfBuffers + 1 ];
static char *MV_MixBufferPtr = NULL;
static VoiceNode *MV_Voices = NULL;
static VoiceNode VoiceList;
static VoiceNode VoicePool;
int MV_MixPage = 0;
static int MV_VoiceHandle = MV_MinVoiceHandle;
static void(*MV_CallBackFunc)(unsigned long) = NULL;
static void(*MV_RecordFunc)(char *ptr, int length) = NULL;
static void(*MV_MixFunction)(VoiceNode *voice, int buffer);
static int MV_MaxVolume = 63;
char *MV_HarshClipTable;
char *MV_MixDestination;
short *MV_LeftVolume;
short *MV_RightVolume;
int MV_SampleSize = 1;
int MV_RightChannelOffset;
unsigned long MV_MixPosition;
int MV_ErrorCode = MV_Ok;
#define MV_SetErrorCode(status) \
MV_ErrorCode = (status);
/*---------------------------------------------------------------------
Function: MV_ErrorString
Returns a pointer to the error message associated with an error
number. A -1 returns a pointer the current error.
---------------------------------------------------------------------*/
char *MV_ErrorString(int ErrorNumber)
{
char *ErrorString;
switch (ErrorNumber)
{
case MV_Warning :
case MV_Error :
ErrorString = MV_ErrorString(MV_ErrorCode);
break;
case MV_Ok :
ErrorString = "Multivoc ok.";
break;
case MV_UnsupportedCard :
ErrorString = "Selected sound card is not supported by Multivoc.";
break;
case MV_NotInstalled :
ErrorString = "Multivoc not installed.";
break;
case MV_NoVoices :
ErrorString = "No free voices available to Multivoc.";
break;
case MV_NoMem :
ErrorString = "Out of memory in Multivoc.";
break;
case MV_VoiceNotFound :
ErrorString = "No voice with matching handle found.";
break;
case MV_BlasterError :
#if defined(_WIN32)
ErrorString = DSOUND_ErrorString(DSOUND_ErrorCode);
#else
ErrorString = DSL_ErrorString(DSL_ErrorCode);
#endif
break;
case MV_DPMI_Error :
ErrorString = "DPMI Error in Multivoc.";
break;
case MV_InvalidVOCFile :
ErrorString = "Invalid VOC file passed in to Multivoc.";
break;
case MV_InvalidWAVFile :
ErrorString = "Invalid WAV file passed in to Multivoc.";
break;
case MV_InvalidMixMode :
ErrorString = "Invalid mix mode request in Multivoc.";
break;
case MV_IrqFailure :
ErrorString = "Playback failed, possibly due to an invalid or conflicting IRQ.";
break;
case MV_DMAFailure :
ErrorString = "Playback failed, possibly due to an invalid or conflicting DMA channel.";
break;
case MV_DMA16Failure :
ErrorString = "Playback failed, possibly due to an invalid or conflicting DMA channel. \n"
"Make sure the 16-bit DMA channel is correct.";
break;
case MV_NullRecordFunction :
ErrorString = "Null record function passed to MV_StartRecording.";
break;
default :
ErrorString = "Unknown Multivoc error code.";
break;
}
return(ErrorString);
}
/**********************************************************************
Memory locked functions:
**********************************************************************/
/*---------------------------------------------------------------------
Function: MV_GetBufferSize
Returns the buffer size for the given samplerate.
---------------------------------------------------------------------*/
#define BASEBUFSZ (512+128)
static unsigned MV_GetBufferSize(unsigned samplerate)
{
static unsigned lastsr = 0, lastbufsz = 0;
if (samplerate == lastsr) return lastbufsz;
lastsr = samplerate;
lastbufsz = (samplerate*BASEBUFSZ/22050)&(~15);
return lastbufsz;
}
/*---------------------------------------------------------------------
Function: MV_Mix
Mixes the sound into the buffer.
---------------------------------------------------------------------*/
static void MV_Mix(VoiceNode *voice, int buffer)
{
char *start;
int length;
long voclength;
unsigned long position;
unsigned long rate;
unsigned long FixedPointBufferSize;
if ((voice->length == 0) && (voice->GetSound(voice) != KeepPlaying))
{
return;
}
length = MixBufferSize;
FixedPointBufferSize = voice->FixedPointBufferSize;
MV_MixDestination = MV_MixBuffer[ buffer ];
MV_LeftVolume = voice->LeftVolume;
MV_RightVolume = voice->RightVolume;
if ((MV_Channels == 2) && (IS_QUIET(MV_LeftVolume)))
{
MV_LeftVolume = MV_RightVolume;
MV_MixDestination += MV_RightChannelOffset;
}
// Add this voice to the mix
while (length > 0)
{
start = voice->sound;
rate = voice->RateScale;
position = voice->position;
// Check if the last sample in this buffer would be
// beyond the length of the sample block
if ((position + FixedPointBufferSize) >= voice->length)
{
if (position < voice->length)
{
voclength = (voice->length - position + rate - 1) / rate;
}
else
{
voice->GetSound(voice);
return;
}
}
else
{
voclength = length;
}
voice->mix(position, rate, start, voclength);
if (voclength & 1)
{
MV_MixPosition += rate;
voclength -= 1;
}
voice->position = MV_MixPosition;
length -= voclength;
if (voice->position >= voice->length)
{
// Get the next block of sound
if (voice->GetSound(voice) != KeepPlaying)
{
return;
}
if (length > 0)
{
// Get the position of the last sample in the buffer
FixedPointBufferSize = voice->RateScale * (length - 1);
}
}
}
}
/*---------------------------------------------------------------------
Function: MV_PlayVoice
Adds a voice to the play list.
---------------------------------------------------------------------*/
void MV_PlayVoice(VoiceNode *voice)
{
unsigned flags;
flags = DisableInterrupts();
LL_SortedInsertion(&VoiceList, voice, prev, next, VoiceNode, priority);
RestoreInterrupts(flags);
}
/*---------------------------------------------------------------------
Function: MV_StopVoice
Removes the voice from the play list and adds it to the free list.
---------------------------------------------------------------------*/
void MV_StopVoice(VoiceNode *voice)
{
unsigned int flags;
flags = DisableInterrupts();
// move the voice from the play list to the free list
LL_Remove(voice, next, prev);
LL_Add(&VoicePool, voice, next, prev);
RestoreInterrupts(flags);
}
/*---------------------------------------------------------------------
Function: MV_ServiceVoc
Starts playback of the waiting buffer and mixes the next one.
---------------------------------------------------------------------*/
// static int backcolor = 1;
int MV_ServiceVoc(int buffer)
{
VoiceNode *voice;
VoiceNode *next;
// Get the currently playing buffer
#if defined(_WIN32)
MV_MixPage = buffer;
#endif
// Toggle which buffer we'll mix next
MV_MixPage++;
if (MV_MixPage >= MV_NumberOfBuffers)
{
MV_MixPage -= MV_NumberOfBuffers;
}
if (MV_ReverbLevel == 0)
{
// Initialize buffer
//Commented out so that the buffer is always cleared.
//This is so the guys at Echo Speech can mix into the
//buffer even when no sounds are playing.
//if (!MV_BufferEmpty[ MV_MixPage ])
{
ClearBuffer_DW(MV_MixBuffer[ MV_MixPage ], MV_Silence, MV_BufferSize >> 2);
MV_BufferEmpty[ MV_MixPage ] = TRUE;
}
}
else
{
char *end;
char *source;
char *dest;
int count;
int length;
end = MV_MixBuffer[ 0 ] + MV_BufferLength;
dest = MV_MixBuffer[ MV_MixPage ];
source = MV_MixBuffer[ MV_MixPage ] - MV_ReverbDelay;
if (source < MV_MixBuffer[ 0 ])
{
source += MV_BufferLength;
}
length = MV_BufferSize;
while (length > 0)
{
count = length;
if (source + count > end)
{
count = end - source;
}
if (MV_Bits == 16)
{
if (MV_ReverbTable != NULL)
{
MV_16BitReverb(source, dest, MV_ReverbTable, count / 2);
}
else
{
MV_16BitReverbFast(source, dest, count / 2, MV_ReverbLevel);
}
}
else
{
if (MV_ReverbTable != NULL)
{
MV_8BitReverb((signed char *)source, (signed char *)dest, MV_ReverbTable, count);
}
else
{
MV_8BitReverbFast((signed char *)source, (signed char *)dest, count, MV_ReverbLevel);
}
}
// if we go through the loop again, it means that we've wrapped around the buffer
source = MV_MixBuffer[ 0 ];
dest += count;
length -= count;
}
}
// Play any waiting voices
for (voice = VoiceList.next; voice != &VoiceList; voice = next)
{
// if ((voice < &MV_Voices[ 0 ]) || (voice > &MV_Voices[ 8 ]))
// {
// SetBorderColor(backcolor++);
// break;
// }
MV_BufferEmpty[ MV_MixPage ] = FALSE;
MV_MixFunction(voice, MV_MixPage);
next = voice->next;
// Is this voice done?
if (!voice->Playing)
{
MV_StopVoice(voice);
if (MV_CallBackFunc)
{
MV_CallBackFunc(voice->callbackval);
}
}
}
return MV_MixPage;
}
/*---------------------------------------------------------------------
Function: MV_GetNextVOCBlock
Interperate the information of a VOC format sound file.
---------------------------------------------------------------------*/
playbackstatus MV_GetNextVOCBlock(VoiceNode *voice)
{
unsigned char *ptr;
int blocktype;
int lastblocktype;
unsigned long blocklength = 0;
unsigned long samplespeed = 0;
unsigned int tc = 0;
int packtype;
int voicemode;
int done;
unsigned BitsPerSample;
unsigned Channels;
unsigned Format;
if (voice->BlockLength > 0)
{
voice->position -= voice->length;
voice->sound += voice->length >> 16;
if (voice->bits == 16)
{
voice->sound += voice->length >> 16;
}
voice->length = min(voice->BlockLength, 0x8000);
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
if ((voice->length > 0) && (voice->LoopEnd != NULL) && (voice->LoopStart != NULL))
{
voice->BlockLength = voice->LoopSize;
voice->sound = voice->LoopStart;
voice->position = 0;
voice->length = min(voice->BlockLength, 0x8000);
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
ptr = (unsigned char *)voice->NextBlock;
voice->Playing = TRUE;
voicemode = 0;
lastblocktype = 0;
packtype = 0;
done = FALSE;
while (!done)
{
// Stop playing if we get a NULL pointer
if (ptr == NULL)
{
voice->Playing = FALSE;
done = TRUE;
break;
}
blocktype = (int)*ptr;
blocklength = (*(unsigned long *)(ptr + 1)) & 0x00ffffff;
ptr += 4;
switch (blocktype)
{
case 0 :
// End of data
if ((voice->LoopStart == NULL) || ((unsigned long *)voice->LoopStart >= (unsigned long *)(ptr - 4)))
{
voice->Playing = FALSE;
done = TRUE;
}
else
{
voice->BlockLength = (char*)(ptr - 4) - voice->LoopStart;
voice->sound = voice->LoopStart;
voice->position = 0;
voice->length = min(voice->BlockLength, 0x8000);
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
break;
case 1 :
// Sound data block
voice->bits = 8;
if (lastblocktype != 8)
{
tc = (unsigned int)*ptr << 8;
packtype = *(ptr + 1);
}
ptr += 2;
blocklength -= 2;
samplespeed = 256000000L / (65536 - tc);
// Skip packed or stereo data
if ((packtype != 0) || (voicemode != 0))
{
ptr += blocklength;
}
else
{
done = TRUE;
}
voicemode = 0;
break;
case 2 :
// Sound continuation block
samplespeed = voice->SamplingRate;
done = TRUE;
break;
case 3 :
// Silence
// Not implimented.
ptr += blocklength;
break;
case 4 :
// Marker
// Not implimented.
ptr += blocklength;
break;
case 5 :
// ASCII string
// Not implimented.
ptr += blocklength;
break;
case 6 :
// Repeat begin
if (voice->LoopEnd == NULL)
{
voice->LoopCount = *(unsigned short *)ptr;
voice->LoopStart = (char *)(ptr + blocklength);
}
ptr += blocklength;
break;
case 7 :
// Repeat end
ptr += blocklength;
if (lastblocktype == 6)
{
voice->LoopCount = 0;
}
else
{
if ((voice->LoopCount > 0) && (voice->LoopStart != NULL))
{
ptr = (unsigned char *)voice->LoopStart;
if (voice->LoopCount < 0xffff)
{
voice->LoopCount--;
if (voice->LoopCount == 0)
{
voice->LoopStart = NULL;
}
}
}
}
break;
case 8 :
// Extended block
voice->bits = 8;
tc = *(unsigned short *)ptr;
packtype = *(ptr + 2);
voicemode = *(ptr + 3);
ptr += blocklength;
break;
case 9 :
// New sound data block
samplespeed = *(unsigned long *)ptr;
BitsPerSample = (unsigned)*(ptr + 4);
Channels = (unsigned)*(ptr + 5);
Format = (unsigned)*(unsigned short *)(ptr + 6);
if ((BitsPerSample == 8) && (Channels == 1) && (Format == VOC_8BIT))
{
ptr += 12;
blocklength -= 12;
voice->bits = 8;
done = TRUE;
}
else if ((BitsPerSample == 16) && (Channels == 1) && (Format == VOC_16BIT))
{
ptr += 12;
blocklength -= 12;
voice->bits = 16;
done = TRUE;
}
else
{
ptr += blocklength;
}
break;
default :
// Unknown data. Probably not a VOC file.
voice->Playing = FALSE;
done = TRUE;
break;
}
lastblocktype = blocktype;
}
if (voice->Playing)
{
voice->NextBlock = (char *)(ptr + blocklength);
voice->sound = (char *)ptr;
voice->SamplingRate = samplespeed;
voice->RateScale = (voice->SamplingRate * voice->PitchScale) / MV_MixRate;
// Multiply by MixBufferSize - 1
voice->FixedPointBufferSize = (voice->RateScale * MixBufferSize) -
voice->RateScale;
if (voice->LoopEnd != NULL)
{
if (blocklength > (unsigned long)voice->LoopEnd)
{
blocklength = (unsigned long)voice->LoopEnd;
}
else
{
voice->LoopEnd = (char *)blocklength;
}
voice->LoopStart = voice->sound + (unsigned long)voice->LoopStart;
voice->LoopEnd = voice->sound + (unsigned long)voice->LoopEnd;
voice->LoopSize = voice->LoopEnd - voice->LoopStart;
}
if (voice->bits == 16)
{
blocklength /= 2;
}
voice->position = 0;
voice->length = min(blocklength, 0x8000);
voice->BlockLength = blocklength - voice->length;
voice->length <<= 16;
MV_SetVoiceMixMode(voice);
return(KeepPlaying);
}
return(NoMoreData);
}
/*---------------------------------------------------------------------
Function: MV_GetNextDemandFeedBlock
Controls playback of demand fed data.
---------------------------------------------------------------------*/
playbackstatus MV_GetNextDemandFeedBlock(VoiceNode *voice)
{
if (voice->BlockLength > 0)
{
voice->position -= voice->length;
voice->sound += voice->length >> 16;
voice->length = min(voice->BlockLength, 0x8000);
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
if (voice->DemandFeed == NULL)
{
return(NoMoreData);
}
voice->position = 0;
(voice->DemandFeed)(&voice->sound, &voice->BlockLength);
voice->length = min(voice->BlockLength, 0x8000);
voice->BlockLength -= voice->length;
voice->length <<= 16;
if ((voice->length > 0) && (voice->sound != NULL))
{
return(KeepPlaying);
}
return(NoMoreData);
}
/*---------------------------------------------------------------------
Function: MV_GetNextRawBlock
Controls playback of demand fed data.
---------------------------------------------------------------------*/
playbackstatus MV_GetNextRawBlock(VoiceNode *voice)
{
if (voice->BlockLength <= 0)
{
if (voice->LoopStart == NULL)
{
voice->Playing = FALSE;
return(NoMoreData);
}
voice->BlockLength = voice->LoopSize;
voice->NextBlock = voice->LoopStart;
voice->length = 0;
voice->position = 0;
}
voice->sound = voice->NextBlock;
voice->position -= voice->length;
voice->length = min(voice->BlockLength, 0x8000);
voice->NextBlock += voice->length;
if (voice->bits == 16)
{
voice->NextBlock += voice->length;
}
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
/*---------------------------------------------------------------------
Function: MV_GetNextWAVBlock
Controls playback of demand fed data.
---------------------------------------------------------------------*/
playbackstatus MV_GetNextWAVBlock(VoiceNode *voice)
{
if (voice->BlockLength <= 0)
{
if (voice->LoopStart == NULL)
{
voice->Playing = FALSE;
return(NoMoreData);
}
voice->BlockLength = voice->LoopSize;
voice->NextBlock = voice->LoopStart;
voice->length = 0;
voice->position = 0;
}
voice->sound = voice->NextBlock;
voice->position -= voice->length;
voice->length = min(voice->BlockLength, 0x8000);
voice->NextBlock += voice->length;
if (voice->bits == 16)
{
voice->NextBlock += voice->length;
}
voice->BlockLength -= voice->length;
voice->length <<= 16;
return(KeepPlaying);
}
/*---------------------------------------------------------------------
Function: MV_ServiceRecord
Starts recording of the waiting buffer.
---------------------------------------------------------------------*/
#if 0
static void MV_ServiceRecord(void)
{
if (MV_RecordFunc)
{
MV_RecordFunc(MV_MixBuffer[ 0 ] + MV_MixPage * MixBufferSize, MixBufferSize);
}
// Toggle which buffer we'll mix next
MV_MixPage++;
if (MV_MixPage >= NumberOfBuffers)
{
MV_MixPage = 0;
}
}
#endif
/*---------------------------------------------------------------------
Function: MV_GetVoice
Locates the voice with the specified handle.
---------------------------------------------------------------------*/
VoiceNode *MV_GetVoice(int handle)
{
VoiceNode *voice;
unsigned flags;
flags = DisableInterrupts();
for (voice = VoiceList.next; voice != &VoiceList; voice = voice->next)
{
if (handle == voice->handle)
{
break;
}
}
RestoreInterrupts(flags);
if (voice == &VoiceList)
{
MV_SetErrorCode(MV_VoiceNotFound);
voice = NULL;
}
return(voice);
}
/*---------------------------------------------------------------------
Function: MV_VoicePlaying
Checks if the voice associated with the specified handle is
playing.
---------------------------------------------------------------------*/
int MV_VoicePlaying(int handle)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(FALSE);
}
voice = MV_GetVoice(handle);
if (voice == NULL)
{
return(FALSE);
}
return(TRUE);
}
/*---------------------------------------------------------------------
Function: MV_KillAllVoices
Stops output of all currently active voices.
---------------------------------------------------------------------*/
int MV_KillAllVoices(void)
{
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
// Remove all the voices from the list
while (VoiceList.next != &VoiceList)
{
MV_Kill(VoiceList.next->handle);
}
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_Kill
Stops output of the voice associated with the specified handle.
---------------------------------------------------------------------*/
int MV_Kill(int handle)
{
VoiceNode *voice;
unsigned flags;
unsigned long callbackval;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
flags = DisableInterrupts();
voice = MV_GetVoice(handle);
if (voice == NULL)
{
RestoreInterrupts(flags);
MV_SetErrorCode(MV_VoiceNotFound);
return(MV_Error);
}
callbackval = voice->callbackval;
MV_StopVoice(voice);
RestoreInterrupts(flags);
if (MV_CallBackFunc)
{
MV_CallBackFunc(callbackval);
}
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_VoicesPlaying
Determines the number of currently active voices.
---------------------------------------------------------------------*/
int MV_VoicesPlaying(void)
{
VoiceNode *voice;
int NumVoices = 0;
unsigned flags;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(0);
}
flags = DisableInterrupts();
for (voice = VoiceList.next; voice != &VoiceList; voice = voice->next)
{
NumVoices++;
}
RestoreInterrupts(flags);
return(NumVoices);
}
/*---------------------------------------------------------------------
Function: MV_AllocVoice
Retrieve an inactive or lower priority voice for output.
---------------------------------------------------------------------*/
VoiceNode *MV_AllocVoice(int priority)
{
VoiceNode *voice;
VoiceNode *node;
unsigned flags;
//return(NULL);
if (MV_Recording)
{
return(NULL);
}
flags = DisableInterrupts();
// Check if we have any free voices
if (LL_Empty(&VoicePool, next, prev))
{
// check if we have a higher priority than a voice that is playing.
voice = VoiceList.next;
for (node = voice->next; node != &VoiceList; node = node->next)
{
if (node->priority < voice->priority)
{
voice = node;
}
}
if (priority >= voice->priority)
{
MV_Kill(voice->handle);
}
}
// Check if any voices are in the voice pool
if (LL_Empty(&VoicePool, next, prev))
{
// No free voices
RestoreInterrupts(flags);
return(NULL);
}
voice = VoicePool.next;
LL_Remove(voice, next, prev);
RestoreInterrupts(flags);
// Find a free voice handle
do
{
MV_VoiceHandle++;
if (MV_VoiceHandle < MV_MinVoiceHandle)
{
MV_VoiceHandle = MV_MinVoiceHandle;
}
}
while (MV_VoicePlaying(MV_VoiceHandle));
voice->handle = MV_VoiceHandle;
return(voice);
}
/*---------------------------------------------------------------------
Function: MV_VoiceAvailable
Checks if a voice can be play at the specified priority.
---------------------------------------------------------------------*/
int MV_VoiceAvailable(int priority)
{
VoiceNode *voice;
VoiceNode *node;
unsigned flags;
// Check if we have any free voices
if (!LL_Empty(&VoicePool, next, prev))
{
return(TRUE);
}
flags = DisableInterrupts();
// check if we have a higher priority than a voice that is playing.
voice = VoiceList.next;
for (node = VoiceList.next; node != &VoiceList; node = node->next)
{
if (node->priority < voice->priority)
{
voice = node;
}
}
RestoreInterrupts(flags);
if ((voice != &VoiceList) && (priority >= voice->priority))
{
return(TRUE);
}
return(FALSE);
}
/*---------------------------------------------------------------------
Function: MV_SetVoicePitch
Sets the pitch for the specified voice.
---------------------------------------------------------------------*/
void MV_SetVoicePitch(VoiceNode *voice, unsigned long rate, int pitchoffset)
{
voice->SamplingRate = rate;
voice->PitchScale = PITCH_GetScale(pitchoffset);
voice->RateScale = (rate * voice->PitchScale) / MV_MixRate;
// Multiply by MixBufferSize - 1
voice->FixedPointBufferSize = (voice->RateScale * MixBufferSize) -
voice->RateScale;
}
/*---------------------------------------------------------------------
Function: MV_SetPitch
Sets the pitch for the voice associated with the specified handle.
---------------------------------------------------------------------*/
int MV_SetPitch(int handle, int pitchoffset)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
voice = MV_GetVoice(handle);
if (voice == NULL)
{
MV_SetErrorCode(MV_VoiceNotFound);
return(MV_Error);
}
MV_SetVoicePitch(voice, voice->SamplingRate, pitchoffset);
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_SetFrequency
Sets the frequency for the voice associated with the specified handle.
---------------------------------------------------------------------*/
int MV_SetFrequency(int handle, int frequency)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
voice = MV_GetVoice(handle);
if (voice == NULL)
{
MV_SetErrorCode(MV_VoiceNotFound);
return(MV_Error);
}
MV_SetVoicePitch(voice, frequency, 0);
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_GetVolumeTable
Returns a pointer to the volume table associated with the specified
volume.
---------------------------------------------------------------------*/
static short *MV_GetVolumeTable(int vol)
{
int volume;
short *table;
volume = MIX_VOLUME(vol);
table = (short*)&MV_VolumeTable[ volume ];
return(table);
}
/*---------------------------------------------------------------------
Function: MV_SetVoiceMixMode
Selects which method should be used to mix the voice.
---------------------------------------------------------------------*/
static void MV_SetVoiceMixMode(VoiceNode *voice)
{
unsigned flags;
int test;
flags = DisableInterrupts();
test = T_DEFAULT;
if (MV_Bits == 8)
{
test |= T_8BITS;
}
if (voice->bits == 16)
{
test |= T_16BITSOURCE;
}
if (MV_Channels == 1)
{
test |= T_MONO;
}
else
{
if (IS_QUIET(voice->RightVolume))
{
test |= T_RIGHTQUIET;
}
else if (IS_QUIET(voice->LeftVolume))
{
test |= T_LEFTQUIET;
}
}
// Default case
voice->mix = MV_Mix8BitMono;
switch (test)
{
case T_8BITS | T_MONO | T_16BITSOURCE :
voice->mix = MV_Mix8BitMono16;
break;
case T_8BITS | T_MONO :
voice->mix = MV_Mix8BitMono;
break;
case T_8BITS | T_16BITSOURCE | T_LEFTQUIET :
MV_LeftVolume = MV_RightVolume;
voice->mix = MV_Mix8BitMono16;
break;
case T_8BITS | T_LEFTQUIET :
MV_LeftVolume = MV_RightVolume;
voice->mix = MV_Mix8BitMono;
break;
case T_8BITS | T_16BITSOURCE | T_RIGHTQUIET :
voice->mix = MV_Mix8BitMono16;
break;
case T_8BITS | T_RIGHTQUIET :
voice->mix = MV_Mix8BitMono;
break;
case T_8BITS | T_16BITSOURCE :
voice->mix = MV_Mix8BitStereo16;
break;
case T_8BITS :
voice->mix = MV_Mix8BitStereo;
break;
case T_MONO | T_16BITSOURCE :
voice->mix = MV_Mix16BitMono16;
break;
case T_MONO :
voice->mix = MV_Mix16BitMono;
break;
case T_16BITSOURCE | T_LEFTQUIET :
MV_LeftVolume = MV_RightVolume;
voice->mix = MV_Mix16BitMono16;
break;
case T_LEFTQUIET :
MV_LeftVolume = MV_RightVolume;
voice->mix = MV_Mix16BitMono;
break;
case T_16BITSOURCE | T_RIGHTQUIET :
voice->mix = MV_Mix16BitMono16;
break;
case T_RIGHTQUIET :
voice->mix = MV_Mix16BitMono;
break;
case T_16BITSOURCE :
voice->mix = MV_Mix16BitStereo16;
break;
case T_SIXTEENBIT_STEREO :
voice->mix = MV_Mix16BitStereo;
break;
default :
voice->mix = MV_Mix8BitMono;
}
RestoreInterrupts(flags);
}
/*---------------------------------------------------------------------
Function: MV_SetVoiceVolume
Sets the stereo and mono volume level of the voice associated
with the specified handle.
---------------------------------------------------------------------*/
void MV_SetVoiceVolume(VoiceNode *voice, int vol, int left, int right)
{
if (MV_Channels == 1)
{
left = vol;
right = vol;
}
if (MV_SwapLeftRight)
{
// SBPro uses reversed panning
voice->LeftVolume = MV_GetVolumeTable(right);
voice->RightVolume = MV_GetVolumeTable(left);
}
else
{
voice->LeftVolume = MV_GetVolumeTable(left);
voice->RightVolume = MV_GetVolumeTable(right);
}
MV_SetVoiceMixMode(voice);
}
/*---------------------------------------------------------------------
Function: MV_EndLooping
Stops the voice associated with the specified handle from looping
without stoping the sound.
---------------------------------------------------------------------*/
int MV_EndLooping(int handle)
{
VoiceNode *voice;
unsigned flags;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
flags = DisableInterrupts();
voice = MV_GetVoice(handle);
if (voice == NULL)
{
RestoreInterrupts(flags);
MV_SetErrorCode(MV_VoiceNotFound);
return(MV_Warning);
}
voice->LoopCount = 0;
voice->LoopStart = NULL;
voice->LoopEnd = NULL;
RestoreInterrupts(flags);
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_SetPan
Sets the stereo and mono volume level of the voice associated
with the specified handle.
---------------------------------------------------------------------*/
int MV_SetPan(int handle, int vol, int left, int right)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
voice = MV_GetVoice(handle);
if (voice == NULL)
{
MV_SetErrorCode(MV_VoiceNotFound);
return(MV_Warning);
}
MV_SetVoiceVolume(voice, vol, left, right);
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_Pan3D
Set the angle and distance from the listener of the voice associated
with the specified handle.
---------------------------------------------------------------------*/
int MV_Pan3D(int handle, int angle, int distance)
{
int left;
int right;
int mid;
int volume;
int status;
if (distance < 0)
{
distance = -distance;
angle += MV_NumPanPositions / 2;
}
volume = MIX_VOLUME(distance);
// Ensure angle is within 0 - 31
angle &= MV_MaxPanPosition;
left = MV_PanTable[ angle ][ volume ].left;
right = MV_PanTable[ angle ][ volume ].right;
mid = max(0, 255 - distance);
status = MV_SetPan(handle, mid, left, right);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_SetReverb
Sets the level of reverb to add to mix.
---------------------------------------------------------------------*/
void MV_SetReverb(int reverb)
{
MV_ReverbLevel = MIX_VOLUME(reverb);
MV_ReverbTable = &MV_VolumeTable[ MV_ReverbLevel ];
}
/*---------------------------------------------------------------------
Function: MV_SetFastReverb
Sets the level of reverb to add to mix.
---------------------------------------------------------------------*/
void MV_SetFastReverb(int reverb)
{
MV_ReverbLevel = max(0, min(16, reverb));
MV_ReverbTable = NULL;
}
/*---------------------------------------------------------------------
Function: MV_GetMaxReverbDelay
Returns the maximum delay time for reverb.
---------------------------------------------------------------------*/
int MV_GetMaxReverbDelay(void)
{
int maxdelay;
maxdelay = MixBufferSize * MV_NumberOfBuffers;
return maxdelay;
}
/*---------------------------------------------------------------------
Function: MV_GetReverbDelay
Returns the current delay time for reverb.
---------------------------------------------------------------------*/
int MV_GetReverbDelay(void)
{
return MV_ReverbDelay / MV_SampleSize;
}
/*---------------------------------------------------------------------
Function: MV_SetReverbDelay
Sets the delay level of reverb to add to mix.
---------------------------------------------------------------------*/
void MV_SetReverbDelay(int delay)
{
int maxdelay;
maxdelay = MV_GetMaxReverbDelay();
MV_ReverbDelay = max((signed)MixBufferSize, min(delay, maxdelay));
MV_ReverbDelay *= MV_SampleSize;
}
/*---------------------------------------------------------------------
Function: MV_SetMixMode
Prepares Multivoc to play stereo of mono digitized sounds.
---------------------------------------------------------------------*/
int MV_SetMixMode(int numchannels, int samplebits)
{
int mode;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
mode = 0;
if (numchannels == 2)
{
mode |= STEREO;
}
if (samplebits == 16)
{
mode |= SIXTEEN_BIT;
}
#if defined(_WIN32)
MV_MixMode = DSOUND_SetMixMode(mode);
#else
MV_MixMode = mode;
#endif
MV_Channels = 1;
if (MV_MixMode & STEREO)
{
MV_Channels = 2;
}
MV_Bits = 8;
if (MV_MixMode & SIXTEEN_BIT)
{
MV_Bits = 16;
}
MV_BuffShift = 7 + MV_Channels;
MV_SampleSize = sizeof(MONO8) * MV_Channels;
if (MV_Bits == 8)
{
MV_Silence = SILENCE_8BIT;
}
else
{
MV_Silence = SILENCE_16BIT;
MV_BuffShift += 1;
MV_SampleSize *= 2;
}
MV_BufferSize = MixBufferSize * MV_SampleSize;
MV_NumberOfBuffers = TotalBufferSize / MV_BufferSize;
MV_BufferLength = TotalBufferSize;
MV_RightChannelOffset = MV_SampleSize / 2;
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_StartPlayback
Starts the sound playback engine.
---------------------------------------------------------------------*/
int MV_StartPlayback(void)
{
int status;
int buffer;
// Initialize the buffers
ClearBuffer_DW(MV_MixBuffer[ 0 ], MV_Silence, TotalBufferSize >> 2);
for (buffer = 0; buffer < MV_NumberOfBuffers; buffer++)
{
MV_BufferEmpty[ buffer ] = TRUE;
}
// Set the mix buffer variables
MV_MixPage = 1;
MV_MixFunction = MV_Mix;
#if defined(_WIN32)
MV_MixRate = MV_RequestedMixRate;
// Start playback
status = DSOUND_BeginBufferedPlayback(MV_MixBuffer[ 0 ], MV_ServiceVoc, TotalBufferSize, MV_NumberOfBuffers);
if (status != DSOUND_Ok)
{
MV_SetErrorCode(MV_BlasterError);
return(MV_Error);
}
#else
status = DSL_BeginBufferedPlayback(MV_MixBuffer[ 0 ], TotalBufferSize, MV_NumberOfBuffers, MV_RequestedMixRate, MV_MixMode, (void *)MV_ServiceVoc);
if (status != DSL_Ok)
{
MV_SetErrorCode(MV_BlasterError);
return(MV_Error);
}
MV_MixRate = DSL_GetPlaybackRate();
#endif
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_StopPlayback
Stops the sound playback engine.
---------------------------------------------------------------------*/
void MV_StopPlayback(void)
{
VoiceNode *voice;
VoiceNode *next;
unsigned flags;
// Stop sound playback
#if defined(_WIN32)
DSOUND_StopPlayback();
#else
DSL_StopPlayback();
#endif
// Make sure all callbacks are done.
flags = DisableInterrupts();
for (voice = VoiceList.next; voice != &VoiceList; voice = next)
{
next = voice->next;
MV_StopVoice(voice);
if (MV_CallBackFunc)
{
MV_CallBackFunc(voice->callbackval);
}
}
RestoreInterrupts(flags);
}
#if 0
/*---------------------------------------------------------------------
Function: MV_StartRecording
Starts the sound recording engine.
---------------------------------------------------------------------*/
int MV_StartRecording(int MixRate, void(*function)(char *ptr, int length))
{
int status;
switch (MV_SoundCard)
{
case SoundBlaster :
break;
default :
MV_SetErrorCode(MV_UnsupportedCard);
return(MV_Error);
break;
}
if (function == NULL)
{
MV_SetErrorCode(MV_NullRecordFunction);
return(MV_Error);
}
MV_StopPlayback();
// Initialize the buffers
ClearBuffer_DW(MV_MixBuffer[ 0 ], SILENCE_8BIT, TotalBufferSize >> 2);
// Set the mix buffer variables
MV_MixPage = 0;
MV_RecordFunc = function;
// Start playback
switch (MV_SoundCard)
{
case SoundBlaster :
status = BLASTER_BeginBufferedRecord(MV_MixBuffer[ 0 ], TotalBufferSize, NumberOfBuffers, MixRate, MONO_8BIT, MV_ServiceRecord);
if (status != BLASTER_Ok)
{
MV_SetErrorCode(MV_BlasterError);
return(MV_Error);
}
break;
}
MV_Recording = TRUE;
return(MV_Ok);
}
#endif
#if 0
/*---------------------------------------------------------------------
Function: MV_StopRecord
Stops the sound record engine.
---------------------------------------------------------------------*/
void MV_StopRecord(void)
{
// Stop sound playback
switch (MV_SoundCard)
{
case SoundBlaster :
BLASTER_StopPlayback();
break;
}
MV_Recording = FALSE;
MV_StartPlayback();
}
#endif
/*---------------------------------------------------------------------
Function: MV_StartDemandFeedPlayback
Plays a digitized sound from a user controlled buffering system.
---------------------------------------------------------------------*/
int MV_StartDemandFeedPlayback(void(*function)(char **ptr, unsigned long *length), int rate, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
// Request a voice from the voice pool
voice = MV_AllocVoice(priority);
if (voice == NULL)
{
MV_SetErrorCode(MV_NoVoices);
return(MV_Error);
}
voice->wavetype = DemandFeed;
voice->bits = 8;
voice->GetSound = MV_GetNextDemandFeedBlock;
voice->NextBlock = NULL;
voice->DemandFeed = function;
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->BlockLength = 0;
voice->position = 0;
voice->sound = NULL;
voice->length = 0;
voice->BlockLength = 0;
voice->Playing = TRUE;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
MV_SetVoicePitch(voice, rate, pitchoffset);
MV_SetVoiceVolume(voice, vol, left, right);
MV_PlayVoice(voice);
return(voice->handle);
}
/*---------------------------------------------------------------------
Function: MV_PlayRaw
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayRaw(char *ptr, unsigned long length, unsigned rate, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
int status;
status = MV_PlayLoopedRaw(ptr, length, NULL, NULL, rate, pitchoffset, vol, left, right, priority, callbackval);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_PlayLoopedRaw
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayLoopedRaw(char *ptr, long length, char *loopstart, char *loopend, unsigned rate, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
VoiceNode *voice;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
// Request a voice from the voice pool
voice = MV_AllocVoice(priority);
if (voice == NULL)
{
MV_SetErrorCode(MV_NoVoices);
return(MV_Error);
}
voice->wavetype = Raw;
voice->bits = 8;
voice->GetSound = MV_GetNextRawBlock;
voice->Playing = TRUE;
voice->NextBlock = ptr;
voice->position = 0;
voice->BlockLength = length;
voice->length = 0;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
voice->LoopStart = loopstart;
voice->LoopEnd = loopend;
voice->LoopSize = (voice->LoopEnd - voice->LoopStart) + 1;
MV_SetVoicePitch(voice, rate, pitchoffset);
MV_SetVoiceVolume(voice, vol, left, right);
MV_PlayVoice(voice);
return(voice->handle);
}
/*---------------------------------------------------------------------
Function: MV_PlayWAV
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayWAV(char *ptr, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
int status;
status = MV_PlayLoopedWAV(ptr, -1, -1, pitchoffset, vol, left, right, priority, callbackval);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_PlayWAV3D
Begin playback of sound data at specified angle and distance
from listener.
---------------------------------------------------------------------*/
int MV_PlayWAV3D(char *ptr, int pitchoffset, int angle, int distance, int priority, unsigned long callbackval)
{
int left;
int right;
int mid;
int volume;
int status;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
if (distance < 0)
{
distance = -distance;
angle += MV_NumPanPositions / 2;
}
volume = MIX_VOLUME(distance);
// Ensure angle is within 0 - 31
angle &= MV_MaxPanPosition;
left = MV_PanTable[ angle ][ volume ].left;
right = MV_PanTable[ angle ][ volume ].right;
mid = max(0, 255 - distance);
status = MV_PlayWAV(ptr, pitchoffset, mid, left, right, priority, callbackval);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_PlayLoopedWAV
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayLoopedWAV(char *ptr, long loopstart, long loopend, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
riff_header *riff;
format_header *format;
data_header *data;
VoiceNode *voice;
int length;
int absloopend;
int absloopstart;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
riff = (riff_header *)ptr;
if ((strncmp(riff->RIFF, "RIFF", 4) != 0) || (strncmp(riff->WAVE, "WAVE", 4) != 0) || (strncmp(riff->fmt, "fmt ", 4) != 0))
{
MV_SetErrorCode(MV_InvalidWAVFile);
return(MV_Error);
}
format = (format_header *)(riff + 1);
data = (data_header *)(((char *)format) + riff->format_size);
// Check if it's PCM data.
if (format->wFormatTag != 1)
{
MV_SetErrorCode(MV_InvalidWAVFile);
return(MV_Error);
}
if (format->nChannels != 1)
{
MV_SetErrorCode(MV_InvalidWAVFile);
return(MV_Error);
}
if ((format->nBitsPerSample != 8) && (format->nBitsPerSample != 16))
{
MV_SetErrorCode(MV_InvalidWAVFile);
return(MV_Error);
}
if (strncmp((char *)data->DATA, "data", 4) != 0)
{
MV_SetErrorCode(MV_InvalidWAVFile);
return(MV_Error);
}
// Request a voice from the voice pool
voice = MV_AllocVoice(priority);
if (voice == NULL)
{
MV_SetErrorCode(MV_NoVoices);
return(MV_Error);
}
voice->wavetype = WAV;
voice->bits = format->nBitsPerSample;
voice->GetSound = MV_GetNextWAVBlock;
length = data->size;
absloopstart = loopstart;
absloopend = loopend;
if (voice->bits == 16)
{
loopstart *= 2;
data->size &= ~1;
loopend *= 2;
length /= 2;
}
loopend = min(loopend, (signed)data->size);
absloopend = min(absloopend, length);
voice->Playing = TRUE;
voice->DemandFeed = NULL;
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->position = 0;
voice->length = 0;
voice->BlockLength = absloopend;
voice->NextBlock = (char *)(data + 1);
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
voice->LoopStart = voice->NextBlock + loopstart;
voice->LoopEnd = voice->NextBlock + loopend;
voice->LoopSize = absloopend - absloopstart;
if ((loopstart >= (signed)data->size) || (loopstart < 0))
{
voice->LoopStart = NULL;
voice->LoopEnd = NULL;
voice->BlockLength = length;
}
MV_SetVoicePitch(voice, format->nSamplesPerSec, pitchoffset);
MV_SetVoiceVolume(voice, vol, left, right);
MV_PlayVoice(voice);
return(voice->handle);
}
/*---------------------------------------------------------------------
Function: MV_PlayVOC3D
Begin playback of sound data at specified angle and distance
from listener.
---------------------------------------------------------------------*/
int MV_PlayVOC3D(char *ptr, int pitchoffset, int angle, int distance, int priority, unsigned long callbackval)
{
int left;
int right;
int mid;
int volume;
int status;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
if (distance < 0)
{
distance = -distance;
angle += MV_NumPanPositions / 2;
}
volume = MIX_VOLUME(distance);
// Ensure angle is within 0 - 31
angle &= MV_MaxPanPosition;
left = MV_PanTable[ angle ][ volume ].left;
right = MV_PanTable[ angle ][ volume ].right;
mid = max(0, 255 - distance);
status = MV_PlayVOC(ptr, pitchoffset, mid, left, right, priority, callbackval);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_PlayVOC
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayVOC(char *ptr, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
int status;
status = MV_PlayLoopedVOC(ptr, -1, -1, pitchoffset, vol, left, right, priority, callbackval);
return(status);
}
/*---------------------------------------------------------------------
Function: MV_PlayLoopedVOC
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayLoopedVOC(char *ptr, long loopstart, long loopend, int pitchoffset, int vol, int left, int right, int priority, unsigned long callbackval)
{
VoiceNode *voice;
int status;
if (!MV_Installed)
{
MV_SetErrorCode(MV_NotInstalled);
return(MV_Error);
}
// Make sure it's a valid VOC file.
status = strncmp(ptr, "Creative Voice File", 19);
if (status != 0)
{
MV_SetErrorCode(MV_InvalidVOCFile);
return(MV_Error);
}
// Request a voice from the voice pool
voice = MV_AllocVoice(priority);
if (voice == NULL)
{
MV_SetErrorCode(MV_NoVoices);
return(MV_Error);
}
voice->wavetype = VOC;
voice->bits = 8;
voice->GetSound = MV_GetNextVOCBlock;
voice->NextBlock = ptr + *(unsigned short int *)(ptr + 0x14);
voice->DemandFeed = NULL;
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->BlockLength = 0;
voice->PitchScale = PITCH_GetScale(pitchoffset);
voice->length = 0;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
voice->LoopStart = (char *)loopstart;
voice->LoopEnd = (char *)loopend;
voice->LoopSize = loopend - loopstart + 1;
if (loopstart < 0)
{
voice->LoopStart = NULL;
voice->LoopEnd = NULL;
}
MV_SetVoiceVolume(voice, vol, left, right);
MV_PlayVoice(voice);
return(voice->handle);
}
/*---------------------------------------------------------------------
Function: MV_CreateVolumeTable
Create the table used to convert sound data to a specific volume
level.
---------------------------------------------------------------------*/
void MV_CreateVolumeTable(int index, int volume, int MaxVolume)
{
int val;
int level;
int i;
level = (volume * MaxVolume) / MV_MaxTotalVolume;
if (MV_Bits == 16)
{
for (i = 0; i < 65536; i += 256)
{
val = i - 0x8000;
val *= level;
val /= MV_MaxVolume;
MV_VolumeTable[ index ][ i / 256 ] = val;
}
}
else
{
for (i = 0; i < 256; i++)
{
val = i - 0x80;
val *= level;
val /= MV_MaxVolume;
MV_VolumeTable[ volume ][ i ] = val;
}
}
}
/*---------------------------------------------------------------------
Function: MV_CalcVolume
Create the table used to convert sound data to a specific volume
level.
---------------------------------------------------------------------*/
void MV_CalcVolume(int MaxVolume)
{
int volume;
for (volume = 0; volume < 128; volume++)
{
MV_HarshClipTable[ volume ] = 0;
MV_HarshClipTable[ volume + 384 ] = 255;
}
for (volume = 0; volume < 256; volume++)
{
MV_HarshClipTable[ volume + 128 ] = volume;
}
// For each volume level, create a translation table with the
// appropriate volume calculated.
for (volume = 0; volume <= MV_MaxVolume; volume++)
{
MV_CreateVolumeTable(volume, volume, MaxVolume);
}
}
/*---------------------------------------------------------------------
Function: MV_CalcPanTable
Create the table used to determine the stereo volume level of
a sound located at a specific angle and distance from the listener.
---------------------------------------------------------------------*/
void MV_CalcPanTable(void)
{
int level;
int angle;
int distance;
int HalfAngle;
int ramp;
HalfAngle = (MV_NumPanPositions / 2);
for (distance = 0; distance <= MV_MaxVolume; distance++)
{
level = (255 * (MV_MaxVolume - distance)) / MV_MaxVolume;
for (angle = 0; angle <= HalfAngle / 2; angle++)
{
ramp = level - ((level * angle) /
(MV_NumPanPositions / 4));
MV_PanTable[ angle ][ distance ].left = ramp;
MV_PanTable[ HalfAngle - angle ][ distance ].left = ramp;
MV_PanTable[ HalfAngle + angle ][ distance ].left = level;
MV_PanTable[ MV_MaxPanPosition - angle ][ distance ].left = level;
MV_PanTable[ angle ][ distance ].right = level;
MV_PanTable[ HalfAngle - angle ][ distance ].right = level;
MV_PanTable[ HalfAngle + angle ][ distance ].right = ramp;
MV_PanTable[ MV_MaxPanPosition - angle ][ distance ].right = ramp;
}
}
}
/*---------------------------------------------------------------------
Function: MV_SetVolume
Sets the volume of digitized sound playback.
---------------------------------------------------------------------*/
void MV_SetVolume(int volume)
{
volume = max(0, volume);
volume = min(volume, MV_MaxTotalVolume);
MV_TotalVolume = volume;
// Calculate volume table
MV_CalcVolume(volume);
}
/*---------------------------------------------------------------------
Function: MV_GetVolume
Returns the volume of digitized sound playback.
---------------------------------------------------------------------*/
int MV_GetVolume(void)
{
return(MV_TotalVolume);
}
/*---------------------------------------------------------------------
Function: MV_SetCallBack
Set the function to call when a voice stops.
---------------------------------------------------------------------*/
void MV_SetCallBack(void(*function)(unsigned long))
{
MV_CallBackFunc = function;
}
/*---------------------------------------------------------------------
Function: MV_SetReverseStereo
Set the orientation of the left and right channels.
---------------------------------------------------------------------*/
void MV_SetReverseStereo(int setting)
{
MV_SwapLeftRight = setting;
}
/*---------------------------------------------------------------------
Function: MV_GetReverseStereo
Returns the orientation of the left and right channels.
---------------------------------------------------------------------*/
int MV_GetReverseStereo(void)
{
return(MV_SwapLeftRight);
}
#if 0
/*---------------------------------------------------------------------
Function: MV_TestPlayback
Checks if playback has started.
---------------------------------------------------------------------*/
int MV_TestPlayback(void)
{
unsigned flags;
long time;
int start;
int status;
int pos;
flags = DisableInterrupts();
_enable();
status = MV_Error;
start = MV_MixPage;
time = clock() + CLOCKS_PER_SEC * 2;
while (clock() < time)
{
if (MV_MixPage != start)
{
status = MV_Ok;
}
}
RestoreInterrupts(flags);
if (status != MV_Ok)
{
// Just in case an error doesn't get reported
MV_SetErrorCode(MV_DMAFailure);
switch (MV_SoundCard)
{
case SoundBlaster :
pos = BLASTER_GetCurrentPos();
break;
default :
MV_SetErrorCode(MV_UnsupportedCard);
pos = -2;
break;
}
if (pos > 0)
{
MV_SetErrorCode(MV_IrqFailure);
}
else if (pos == 0)
{
if (MV_Bits == 16)
{
MV_SetErrorCode(MV_DMA16Failure);
}
else
{
MV_SetErrorCode(MV_DMAFailure);
}
}
}
return(status);
}
#endif
int USRHOOKS_GetMem(void **ptr, unsigned long size)
{
*ptr = malloc(size);
if (*ptr == NULL)
return(USRHOOKS_Error);
return(USRHOOKS_Ok);
}
int USRHOOKS_FreeMem(void *ptr)
{
free(ptr);
return(USRHOOKS_Ok);
}
/*---------------------------------------------------------------------
Function: MV_Init
Perform the initialization of variables and memory used by
Multivoc.
---------------------------------------------------------------------*/
int MV_Init(int soundcard, int MixRate, int Voices, int numchannels, int samplebits)
{
char *ptr;
int status;
int buffer;
int index;
if (MV_Installed)
{
MV_Shutdown();
}
initprintf("Initializing MultiVoc...\n");
MV_SetErrorCode(MV_Ok);
MV_TotalMemory = Voices * sizeof(VoiceNode) + sizeof(HARSH_CLIP_TABLE_8);
status = USRHOOKS_GetMem((void **)&ptr, MV_TotalMemory);
if (status != USRHOOKS_Ok)
{
MV_SetErrorCode(MV_NoMem);
return(MV_Error);
}
MV_Voices = (VoiceNode *)ptr;
MV_HarshClipTable = ptr + (MV_TotalMemory - sizeof(HARSH_CLIP_TABLE_8));
// Set number of voices before calculating volume table
MV_MaxVoices = Voices;
initprintf(" - Maximum voices: %d\n", MV_MaxVoices);
LL_Reset(&VoiceList, next, prev);
LL_Reset(&VoicePool, next, prev);
for (index = 0; index < Voices; index++)
{
LL_Add(&VoicePool, &MV_Voices[ index ], next, prev);
}
// Set the sampling rate
MV_RequestedMixRate = MixRate;
initprintf(" - Using %d byte mixing buffers\n", MixBufferSize);
// Allocate mix buffer within 1st megabyte
ptr = (char *)malloc(TotalBufferSize + 8); // FIXME: temporarily fixes bounds error somewhere...
if (!ptr)
{
USRHOOKS_FreeMem(MV_Voices);
MV_Voices = NULL;
MV_TotalMemory = 0;
MV_SetErrorCode(MV_NoMem);
return(MV_Error);
}
MV_MixBufferPtr = ptr;
MV_SetReverseStereo(FALSE);
// Initialize the sound card
#if defined(_WIN32)
status = DSOUND_Init(soundcard, MixRate, numchannels, samplebits, TotalBufferSize);
if (status != DSOUND_Ok)
{
MV_SetErrorCode(MV_BlasterError);
}
#else
status = DSL_Init();
if (status != DSL_Ok)
{
MV_SetErrorCode(MV_BlasterError);
}
#endif
if (MV_ErrorCode != MV_Ok)
{
status = MV_ErrorCode;
USRHOOKS_FreeMem(MV_Voices);
MV_Voices = NULL;
MV_TotalMemory = 0;
free(ptr);
MV_SetErrorCode(status);
return(MV_Error);
}
MV_SoundCard = soundcard;
MV_Installed = TRUE;
MV_CallBackFunc = NULL;
MV_RecordFunc = NULL;
MV_Recording = FALSE;
MV_ReverbLevel = 0;
MV_ReverbTable = NULL;
// Set Mixer to play stereo digitized sound
MV_SetMixMode(numchannels, samplebits);
MV_ReverbDelay = MV_BufferSize * 3;
//MV_MixBuffer[ MV_NumberOfBuffers ] = ptr;
for (buffer = 0; buffer < MV_NumberOfBuffers; buffer++)
{
MV_MixBuffer[ buffer ] = ptr;
ptr += MV_BufferSize;
}
// Calculate pan table
MV_CalcPanTable();
MV_SetVolume(MV_MaxTotalVolume);
// Start the playback engine
status = MV_StartPlayback();
if (status != MV_Ok)
{
// Preserve error code while we shutdown.
status = MV_ErrorCode;
MV_Shutdown();
MV_SetErrorCode(status);
return(MV_Error);
}
return(MV_Ok);
}
/*---------------------------------------------------------------------
Function: MV_Shutdown
Restore any resources allocated by Multivoc back to the system.
---------------------------------------------------------------------*/
int MV_Shutdown(void)
{
int buffer;
unsigned flags;
if (!MV_Installed)
{
return(MV_Ok);
}
initprintf("Uninitializing MultiVoc...\n");
flags = DisableInterrupts();
MV_KillAllVoices();
MV_Installed = FALSE;
// Stop the sound recording engine
if (MV_Recording)
{
//MV_StopRecord();
}
// Stop the sound playback engine
MV_StopPlayback();
// Shutdown the sound card
#if defined(_WIN32)
DSOUND_Shutdown();
#else
DSL_Shutdown();
#endif
RestoreInterrupts(flags);
// Free any voices we allocated
USRHOOKS_FreeMem(MV_Voices);
MV_Voices = NULL;
MV_TotalMemory = 0;
LL_Reset(&VoiceList, next, prev);
LL_Reset(&VoicePool, next, prev);
MV_MaxVoices = 1;
// Release the descriptor from our mix buffer
if (MV_MixBufferPtr) free(MV_MixBufferPtr);
MV_MixBufferPtr = NULL;
for (buffer = 0; buffer < NumberOfBuffers; buffer++)
{
MV_MixBuffer[ buffer ] = NULL;
}
return(MV_Ok);
}
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