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raze-gles/source/audiolib/src/multivoc.cpp

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/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
Copyright (C) 2015 EDuke32 developers
Copyright (C) 2015 Voidpoint, LLC
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**********************************************************************
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 "compat.h"
#include "pragmas.h"
#include "linklist.h"
#include "drivers.h"
#include "pitch.h"
#include "multivoc.h"
#include "_multivc.h"
#include "fx_man.h"
static void MV_StopVoice(VoiceNode *voice);
static void MV_ServiceVoc(void);
static VoiceNode *MV_GetVoice(int32_t handle);
static const int16_t *MV_GetVolumeTable(int32_t vol);
#define IS_QUIET(ptr) ((void const *)(ptr) == (void *)&MV_VolumeTable[0])
static int32_t MV_ReverbLevel;
static int32_t MV_ReverbDelay;
static int16_t *MV_ReverbTable = NULL;
static int16_t MV_VolumeTable[MV_MAXVOLUME + 1][256];
Pan MV_PanTable[MV_NUMPANPOSITIONS][MV_MAXVOLUME + 1];
int32_t MV_Installed = FALSE;
static int32_t MV_TotalVolume = MV_MAXTOTALVOLUME;
static int32_t MV_MaxVoices = 1;
static int32_t MV_BufferSize = MV_MIXBUFFERSIZE;
static int32_t MV_BufferLength;
static int32_t MV_NumberOfBuffers = MV_NUMBEROFBUFFERS;
static int32_t MV_Channels = 1;
static int32_t MV_ReverseStereo = FALSE;
int32_t MV_MixRate;
static int32_t MV_BufferEmpty[MV_NUMBEROFBUFFERS];
char *MV_MixBuffer[MV_NUMBEROFBUFFERS + 1];
static VoiceNode *MV_Voices = NULL;
static VoiceNode VoiceList;
static VoiceNode VoicePool;
static int32_t MV_MixPage = 0;
void (*MV_Printf)(const char *fmt, ...) = NULL;
static void (*MV_CallBackFunc)(uint32_t) = NULL;
char *MV_MixDestination;
const int16_t *MV_LeftVolume;
const int16_t *MV_RightVolume;
int32_t MV_SampleSize = 1;
int32_t MV_RightChannelOffset;
int32_t MV_ErrorCode = MV_NotInstalled;
float MV_GlobalVolume = 1.f;
static int32_t lockdepth = 0;
static FORCE_INLINE void DisableInterrupts(void)
{
if (!lockdepth++)
SoundDriver_Lock();
}
static FORCE_INLINE void RestoreInterrupts(void)
{
if (!--lockdepth)
SoundDriver_Unlock();
else if (lockdepth < 0 && MV_Printf)
MV_Printf("RestoreInterrupts(): lockdepth < 0!\n");
}
const char *MV_ErrorString(int32_t ErrorNumber)
{
switch (ErrorNumber)
{
case MV_Error:
return MV_ErrorString(MV_ErrorCode);
case MV_Ok:
return "Multivoc ok.";
case MV_NotInstalled:
return "Multivoc not installed.";
case MV_DriverError:
return SoundDriver_ErrorString(SoundDriver_GetError());
case MV_NoVoices:
return "No free voices available to Multivoc.";
case MV_NoMem:
return "Out of memory in Multivoc.";
case MV_VoiceNotFound:
return "No voice with matching handle found.";
case MV_InvalidFile:
return "Invalid file passed in to Multivoc.";
default:
return "Unknown Multivoc error code.";
}
}
static bool MV_Mix(VoiceNode *voice, int const buffer)
{
if (voice->length == 0 && voice->GetSound(voice) != KeepPlaying)
return false;
int32_t length = MV_MIXBUFFERSIZE;
uint32_t 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
do
{
uint32_t const rate = voice->RateScale;
uint32_t const position = voice->position;
int32_t voclength;
// 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)
{
voice->GetSound(voice);
return true;
}
voclength = (voice->length - position + rate - voice->channels) / rate;
}
else
voclength = length;
float const gv = MV_GlobalVolume;
if (voice->priority == FX_MUSIC_PRIORITY)
MV_GlobalVolume = 1.f;
voice->position = voice->mix(voice, voclength);
MV_GlobalVolume = gv;
length -= voclength;
if (voice->position >= voice->length)
{
// Get the next block of sound
if (voice->GetSound(voice) == NoMoreData)
return false;
if (length > (voice->channels - 1))
{
// Get the position of the last sample in the buffer
FixedPointBufferSize = voice->RateScale * (length - voice->channels);
}
}
} while (length > 0);
return true;
}
void MV_PlayVoice(VoiceNode *voice)
{
DisableInterrupts();
LL_SortedInsertion(&VoiceList, voice, prev, next, VoiceNode, priority);
RestoreInterrupts();
}
static void MV_CleanupVoice(VoiceNode *voice)
{
if (MV_CallBackFunc)
MV_CallBackFunc(voice->callbackval);
switch (voice->wavetype)
{
#ifdef HAVE_VORBIS
case FMT_VORBIS: MV_ReleaseVorbisVoice(voice); break;
#endif
#ifdef HAVE_FLAC
case FMT_FLAC: MV_ReleaseFLACVoice(voice); break;
#endif
case FMT_XA: MV_ReleaseXAVoice(voice); break;
#ifdef HAVE_XMP
case FMT_XMP: MV_ReleaseXMPVoice(voice); break;
#endif
default: break;
}
voice->handle = 0;
}
static void MV_StopVoice(VoiceNode *voice)
{
MV_CleanupVoice(voice);
DisableInterrupts();
// move the voice from the play list to the free list
LL_Remove(voice, next, prev);
LL_Add((VoiceNode*) &VoicePool, voice, next, prev);
RestoreInterrupts();
}
/*---------------------------------------------------------------------
JBF: no synchronisation happens inside MV_ServiceVoc nor the
supporting functions it calls. This would cause a deadlock
between the mixer thread in the driver vs the nested
locking in the user-space functions of MultiVoc. The call
to MV_ServiceVoc is synchronised in the driver.
---------------------------------------------------------------------*/
static void MV_ServiceVoc(void)
{
// Toggle which buffer we'll mix next
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])
{
Bmemset(MV_MixBuffer[MV_MixPage], 0, MV_BufferSize);
MV_BufferEmpty[ MV_MixPage ] = TRUE;
}
}
else
{
char const *const end = MV_MixBuffer[0] + MV_BufferLength;
char *dest = MV_MixBuffer[MV_MixPage];
char const *source = MV_MixBuffer[MV_MixPage] - MV_ReverbDelay;
if (source < MV_MixBuffer[ 0 ])
source += MV_BufferLength;
int32_t length = MV_BufferSize;
while (length > 0)
{
int const count = (source + length > end) ? (end - source) : length;
MV_16BitReverb(source, dest, MV_ReverbTable, count / 2);
// 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
//DisableInterrupts();
if (!VoiceList.next || VoiceList.next == &VoiceList)
return;
VoiceNode *voice = VoiceList.next;
int iter = 0;
VoiceNode *next;
do
{
next = voice->next;
if (++iter > MV_MaxVoices && MV_Printf)
MV_Printf("more iterations than voices! iter: %d\n",iter);
if (voice->Paused)
continue;
MV_BufferEmpty[ MV_MixPage ] = FALSE;
// Is this voice done?
if (!MV_Mix(voice, MV_MixPage))
{
MV_CleanupVoice(voice);
LL_Remove(voice, next, prev);
LL_Add((VoiceNode*) &VoicePool, voice, next, prev);
}
}
while ((voice = next) != &VoiceList);
//RestoreInterrupts();
}
static VoiceNode *MV_GetVoice(int32_t handle)
{
if (handle < MV_MINVOICEHANDLE || handle > MV_MaxVoices)
{
if (MV_Printf)
MV_Printf("MV_GetVoice(): bad handle (%d)!\n", handle);
return NULL;
}
DisableInterrupts();
for (VoiceNode *voice = VoiceList.next; voice != &VoiceList; voice = voice->next)
{
if (handle == voice->handle)
{
RestoreInterrupts();
return voice;
}
}
RestoreInterrupts();
MV_SetErrorCode(MV_VoiceNotFound);
return NULL;
}
VoiceNode *MV_BeginService(int32_t handle)
{
if (!MV_Installed)
return NULL;
VoiceNode *voice = MV_GetVoice(handle);
if (voice == NULL)
{
MV_SetErrorCode(MV_VoiceNotFound);
return NULL;
}
DisableInterrupts();
return voice;
}
static inline void MV_EndService(void) { RestoreInterrupts(); }
int32_t MV_VoicePlaying(int32_t handle)
{
return (MV_Installed && MV_GetVoice(handle)) ? TRUE : FALSE;
}
int32_t MV_KillAllVoices(void)
{
if (!MV_Installed)
return MV_Error;
DisableInterrupts();
if (&VoiceList == VoiceList.next)
{
RestoreInterrupts();
return MV_Ok;
}
VoiceNode * voice = VoiceList.prev;
// Remove all the voices from the list
while (voice != &VoiceList)
{
if (voice->priority == MV_MUSIC_PRIORITY)
{
voice = voice->prev;
continue;
}
MV_Kill(voice->handle);
voice = VoiceList.prev;
}
RestoreInterrupts();
return MV_Ok;
}
int32_t MV_Kill(int32_t handle)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
MV_StopVoice(voice);
MV_EndService();
return MV_Ok;
}
int32_t MV_VoicesPlaying(void)
{
if (!MV_Installed)
return 0;
DisableInterrupts();
int NumVoices = 0;
for (VoiceNode *voice = VoiceList.next; voice != &VoiceList; voice = voice->next)
NumVoices++;
RestoreInterrupts();
return NumVoices;
}
VoiceNode *MV_AllocVoice(int32_t priority)
{
VoiceNode *voice, *node;
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.
for (voice = node = VoiceList.next; node != &VoiceList; node = node->next)
{
if (node->priority < voice->priority)
voice = node;
}
if (priority >= voice->priority && voice != &VoiceList && voice->handle >= MV_MINVOICEHANDLE)
MV_Kill(voice->handle);
if (LL_Empty(&VoicePool, next, prev))
{
// No free voices
RestoreInterrupts();
return NULL;
}
}
voice = VoicePool.next;
LL_Remove(voice, next, prev);
RestoreInterrupts();
int32_t vhan = MV_MINVOICEHANDLE;
// Find a free voice handle
do
{
if (++vhan < MV_MINVOICEHANDLE || vhan > MV_MaxVoices)
vhan = MV_MINVOICEHANDLE;
} while (MV_VoicePlaying(vhan));
voice->handle = vhan;
return voice;
}
int32_t MV_VoiceAvailable(int32_t priority)
{
// Check if we have any free voices
if (!LL_Empty(&VoicePool, next, prev))
return TRUE;
DisableInterrupts();
VoiceNode *voice, *node;
// check if we have a higher priority than a voice that is playing.
for (voice = node = VoiceList.next; node != &VoiceList; node = node->next)
{
if (node->priority < voice->priority)
voice = node;
}
if ((voice == &VoiceList) || (priority < voice->priority))
{
RestoreInterrupts();
return FALSE;
}
RestoreInterrupts();
return TRUE;
}
void MV_SetVoicePitch(VoiceNode *voice, uint32_t rate, int32_t pitchoffset)
{
voice->SamplingRate = rate;
voice->PitchScale = PITCH_GetScale(pitchoffset);
voice->RateScale = (rate * voice->PitchScale) / MV_MixRate;
// Multiply by MV_MIXBUFFERSIZE - 1
voice->FixedPointBufferSize = (voice->RateScale * MV_MIXBUFFERSIZE) -
voice->RateScale;
}
int32_t MV_SetPitch(int32_t handle, int32_t pitchoffset)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
MV_SetVoicePitch(voice, voice->SamplingRate, pitchoffset);
MV_EndService();
return MV_Ok;
}
int32_t MV_SetFrequency(int32_t handle, int32_t frequency)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
MV_SetVoicePitch(voice, frequency, 0);
MV_EndService();
return MV_Ok;
}
static inline const int16_t *MV_GetVolumeTable(int32_t vol) { return MV_VolumeTable[MIX_VOLUME(vol)]; }
/*---------------------------------------------------------------------
Function: MV_SetVoiceMixMode
Selects which method should be used to mix the voice.
16Bit 16Bit | 8Bit 16Bit 8Bit 16Bit |
Mono Ster | Mono Mono Ster Ster | Mixer
Out Out | In In In In |
----------------------+---------------------------+-------------
X | X | Mix16BitMono16
X | X | Mix16BitMono
X | X | Mix16BitStereo16
X | X | Mix16BitStereo
----------------------+---------------------------+-------------
X | X | Mix16BitStereo16Stereo
X | X | Mix16BitStereo8Stereo
X | X | Mix16BitMono16Stereo
X | X | Mix16BitMono8Stereo
---------------------------------------------------------------------*/
void MV_SetVoiceMixMode(VoiceNode *voice)
{
int32_t type = T_DEFAULT;
if (MV_Channels == 1)
type |= T_MONO;
else
{
if (IS_QUIET(voice->RightVolume))
type |= T_RIGHTQUIET;
else if (IS_QUIET(voice->LeftVolume))
type |= T_LEFTQUIET;
}
if (voice->bits == 16)
type |= T_16BITSOURCE;
if (voice->channels == 2)
{
type |= T_STEREOSOURCE;
type &= ~(T_RIGHTQUIET | T_LEFTQUIET);
}
switch (type)
{
case T_16BITSOURCE | T_LEFTQUIET:
MV_LeftVolume = MV_RightVolume;
fallthrough__;
case T_16BITSOURCE | T_MONO:
case T_16BITSOURCE | T_RIGHTQUIET: voice->mix = MV_Mix16BitMono16; break;
case T_LEFTQUIET:
MV_LeftVolume = MV_RightVolume;
fallthrough__;
case T_MONO:
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;
case T_16BITSOURCE | T_STEREOSOURCE: voice->mix = MV_Mix16BitStereo16Stereo; break;
case T_16BITSOURCE | T_STEREOSOURCE | T_MONO: voice->mix = MV_Mix16BitMono16Stereo; break;
case T_STEREOSOURCE: voice->mix = MV_Mix16BitStereo8Stereo; break;
case T_STEREOSOURCE | T_MONO: voice->mix = MV_Mix16BitMono8Stereo; break;
default: voice->mix = NULL; break;
}
}
void MV_SetVoiceVolume(VoiceNode *voice, int32_t vol, int32_t left, int32_t right, float volume)
{
if (MV_Channels == 1)
left = right = vol;
voice->LeftVolume = MV_GetVolumeTable(left);
if (left == right)
voice->RightVolume = voice->LeftVolume;
else
{
voice->RightVolume = MV_GetVolumeTable(right);
if (MV_ReverseStereo)
swapptr(&voice->LeftVolume, &voice->RightVolume);
}
voice->volume = volume;
MV_SetVoiceMixMode(voice);
}
int32_t MV_PauseVoice(int32_t handle, int32_t pause)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
voice->Paused = pause;
MV_EndService();
return MV_Ok;
}
int32_t MV_GetPosition(int32_t handle, int32_t *position)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
switch (voice->wavetype)
{
#ifdef HAVE_VORBIS
case FMT_VORBIS: *position = MV_GetVorbisPosition(voice); break;
#endif
#ifdef HAVE_FLAC
case FMT_FLAC: *position = MV_GetFLACPosition(voice); break;
#endif
case FMT_XA: *position = MV_GetXAPosition(voice); break;
#ifdef HAVE_XMP
case FMT_XMP: *position = MV_GetXMPPosition(voice); break;
#endif
default: break;
}
MV_EndService();
return MV_Ok;
}
int32_t MV_SetPosition(int32_t handle, int32_t position)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
switch (voice->wavetype)
{
#ifdef HAVE_VORBIS
case FMT_VORBIS: MV_SetVorbisPosition(voice, position); break;
#endif
#ifdef HAVE_FLAC
case FMT_FLAC: MV_SetFLACPosition(voice, position); break;
#endif
case FMT_XA: MV_SetXAPosition(voice, position); break;
#ifdef HAVE_XMP
case FMT_XMP: MV_SetXMPPosition(voice, position); break;
#endif
default: break;
}
MV_EndService();
return MV_Ok;
}
int32_t MV_EndLooping(int32_t handle)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
voice->LoopCount = 0;
voice->LoopStart = NULL;
voice->LoopEnd = NULL;
MV_EndService();
return MV_Ok;
}
int32_t MV_SetPan(int32_t handle, int32_t vol, int32_t left, int32_t right)
{
VoiceNode *voice = MV_BeginService(handle);
if (voice == NULL)
return MV_Error;
MV_SetVoiceVolume(voice, vol, left, right, voice->volume);
MV_EndService();
return MV_Ok;
}
int32_t MV_Pan3D(int32_t handle, int32_t angle, int32_t distance)
{
if (distance < 0)
{
distance = -distance;
angle += MV_NUMPANPOSITIONS / 2;
}
int const volume = MIX_VOLUME(distance);
angle &= MV_MAXPANPOSITION;
return MV_SetPan(handle, max(0, 255 - distance),
MV_PanTable[ angle ][ volume ].left,
MV_PanTable[ angle ][ volume ].right);
}
void MV_SetReverb(int32_t reverb)
{
MV_ReverbLevel = MIX_VOLUME(reverb);
MV_ReverbTable = &MV_VolumeTable[MV_ReverbLevel][0];
}
int32_t MV_GetMaxReverbDelay(void) { return MV_MIXBUFFERSIZE * MV_NumberOfBuffers; }
int32_t MV_GetReverbDelay(void) { return MV_ReverbDelay / MV_SampleSize; }
void MV_SetReverbDelay(int32_t delay)
{
MV_ReverbDelay = max(MV_MIXBUFFERSIZE, min(delay, MV_GetMaxReverbDelay())) * MV_SampleSize;
}
static int32_t MV_SetMixMode(int32_t numchannels)
{
if (!MV_Installed)
return MV_Error;
MV_Channels = 1 + (numchannels == 2);
MV_SampleSize = sizeof(int8_t) * MV_Channels * 2;
MV_BufferSize = MV_MIXBUFFERSIZE * MV_SampleSize;
MV_NumberOfBuffers = MV_TOTALBUFFERSIZE / MV_BufferSize;
MV_BufferLength = MV_TOTALBUFFERSIZE;
MV_RightChannelOffset = MV_SampleSize >> 1;
return MV_Ok;
}
static int32_t MV_StartPlayback(void)
{
// Initialize the buffers
Bmemset(MV_MixBuffer[0], 0, MV_TOTALBUFFERSIZE);
for (int buffer = 0; buffer < MV_NumberOfBuffers; buffer++)
MV_BufferEmpty[buffer] = TRUE;
MV_MixPage = 1;
if (SoundDriver_BeginPlayback(MV_MixBuffer[0], MV_BufferSize, MV_NumberOfBuffers, MV_ServiceVoc) != MV_Ok)
{
MV_SetErrorCode(MV_DriverError);
return MV_Error;
}
return MV_Ok;
}
static void MV_StopPlayback(void)
{
SoundDriver_StopPlayback();
// Make sure all callbacks are done.
DisableInterrupts();
for (VoiceNode *voice = VoiceList.next, *next; voice != &VoiceList; voice = next)
{
next = voice->next;
MV_StopVoice(voice);
}
RestoreInterrupts();
}
static void MV_CalcVolume(int32_t MaxVolume)
{
// For each volume level, create a translation table with the
// appropriate volume calculated.
for (int volume = 0; volume <= MV_MAXVOLUME; volume++)
{
int const level = (volume * MaxVolume) / MV_MAXTOTALVOLUME;
for (int i = 0; i < 65536; i += 256)
MV_VolumeTable[volume][i / 256] = ((i - 0x8000) * level) / MV_MAXVOLUME;
}
}
static void MV_CalcPanTable(void)
{
const int32_t HalfAngle = MV_NUMPANPOSITIONS / 2;
const int32_t QuarterAngle = HalfAngle / 2;
for (int distance = 0; distance <= MV_MAXVOLUME; distance++)
{
const int32_t level = (255 * (MV_MAXVOLUME - distance)) / MV_MAXVOLUME;
for (int angle = 0; angle <= QuarterAngle; angle++)
{
const int32_t ramp = level - (level * angle) / QuarterAngle;
MV_PanTable[angle][distance].left = ramp;
MV_PanTable[angle][distance].right = level;
MV_PanTable[HalfAngle - angle][distance].left = ramp;
MV_PanTable[HalfAngle - angle][distance].right = level;
MV_PanTable[HalfAngle + angle][distance].left = level;
MV_PanTable[HalfAngle + angle][distance].right = ramp;
MV_PanTable[MV_MAXPANPOSITION - angle][distance].left = level;
MV_PanTable[MV_MAXPANPOSITION - angle][distance].right = ramp;
}
}
}
void MV_SetVolume(int32_t volume)
{
MV_TotalVolume = min(max(0, volume), MV_MAXTOTALVOLUME);
MV_GlobalVolume = (float)volume / 255.f;
// MV_CalcVolume(MV_TotalVolume);
}
int32_t MV_GetVolume(void) { return MV_TotalVolume; }
void MV_SetCallBack(void (*function)(uint32_t)) { MV_CallBackFunc = function; }
void MV_SetReverseStereo(int32_t setting) { MV_ReverseStereo = setting; }
int32_t MV_GetReverseStereo(void) { return MV_ReverseStereo; }
int32_t MV_Init(int32_t soundcard, int32_t MixRate, int32_t Voices, int32_t numchannels, void *initdata)
{
if (MV_Installed)
MV_Shutdown();
MV_SetErrorCode(MV_Ok);
// MV_TotalMemory + 2: FIXME, see valgrind_errors.log
int const totalmem = Voices * sizeof(VoiceNode) + MV_TOTALBUFFERSIZE + 2;
char *ptr = (char *) Xaligned_alloc(16, totalmem);
if (!ptr)
{
MV_SetErrorCode(MV_NoMem);
return MV_Error;
}
Bmemset(ptr, 0, totalmem);
MV_Voices = (VoiceNode *)ptr;
ptr += Voices * sizeof(VoiceNode);
MV_MaxVoices = Voices;
LL_Reset((VoiceNode*) &VoiceList, next, prev);
LL_Reset((VoiceNode*) &VoicePool, next, prev);
for (int index = 0; index < Voices; index++)
LL_Add((VoiceNode*) &VoicePool, &MV_Voices[ index ], next, prev);
MV_SetReverseStereo(FALSE);
ASS_SoundDriver = soundcard;
// Initialize the sound card
if (SoundDriver_Init(&MixRate, &numchannels, initdata) != MV_Ok)
MV_SetErrorCode(MV_DriverError);
if (MV_ErrorCode != MV_Ok)
{
ALIGNED_FREE_AND_NULL(MV_Voices);
return MV_Error;
}
MV_Installed = TRUE;
MV_CallBackFunc = NULL;
MV_ReverbLevel = 0;
MV_ReverbTable = NULL;
// Set the sampling rate
MV_MixRate = MixRate;
// Set Mixer to play stereo digitized sound
MV_SetMixMode(numchannels);
MV_ReverbDelay = MV_BufferSize * 3;
// Make sure we don't cross a physical page
MV_MixBuffer[ MV_NumberOfBuffers ] = ptr;
for (int buffer = 0; buffer < MV_NumberOfBuffers; buffer++)
{
MV_MixBuffer[ buffer ] = ptr;
ptr += MV_BufferSize;
}
// Calculate pan table
MV_CalcPanTable();
MV_CalcVolume(MV_MAXTOTALVOLUME);
// Start the playback engine
if (MV_StartPlayback() != MV_Ok)
{
// Preserve error code while we shutdown.
int status = MV_ErrorCode;
MV_Shutdown();
MV_SetErrorCode(status);
return MV_Error;
}
return MV_Ok;
}
int32_t MV_Shutdown(void)
{
if (!MV_Installed)
return MV_Ok;
MV_KillAllVoices();
MV_Installed = FALSE;
// Stop the sound playback engine
MV_StopPlayback();
// Shutdown the sound card
SoundDriver_Shutdown();
// Free any voices we allocated
ALIGNED_FREE_AND_NULL(MV_Voices);
LL_Reset((VoiceNode*) &VoiceList, next, prev);
LL_Reset((VoiceNode*) &VoicePool, next, prev);
MV_MaxVoices = 1;
// Release the descriptor from our mix buffer
for (int buffer = 0; buffer < MV_NUMBEROFBUFFERS; buffer++)
MV_MixBuffer[ buffer ] = NULL;
MV_SetErrorCode(MV_NotInstalled);
return MV_Ok;
}
void MV_SetPrintf(void (*function)(const char *, ...)) { MV_Printf = function; }
const char *loopStartTags[loopStartTagCount] = { "LOOP_START", "LOOPSTART", "LOOP" };
const char *loopEndTags[loopEndTagCount] = { "LOOP_END", "LOOPEND" };
const char *loopLengthTags[loopLengthTagCount] = { "LOOP_LENGTH", "LOOPLENGTH" };
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