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/***************************************************************************
macosx.c - description
-------------------
begin : Wed May 15 2002
copyright : (C) 2002 by Pete Bernert
email : BlackDove@addcom.de
***************************************************************************/
/***************************************************************************
* *
* 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. See also the license.txt file for *
* additional informations. *
* *
***************************************************************************/
#include "stdafx.h"
#define _IN_MACOSX
#ifdef _MACOSX
#include <Carbon/Carbon.h>
#include "externals.h"
#define kMaxSoundBuffers 20
//static int macBufferSize = 2, macBufferCount = 36;
//static float macSoundPitch = 1.0;
static long macSoundVolume = 100;
volatile int soundBufferAt = -1, soundPlayAt = -1, soundQueued = 0;
char *soundBuffer[kMaxSoundBuffers+1], *emptyBuffer;
SndChannelPtr sndChannel;
//ExtSoundHeader sndHeader;
CmpSoundHeader sndHeader;
SndCallBackUPP callBackUPP;
static int bufferIndex;
////////////////////////////////////////////////////////////////////////
// small linux time helper... only used for watchdog
////////////////////////////////////////////////////////////////////////
unsigned long timeGetTime()
{
struct timeval tv;
gettimeofday(&tv, 0); // well, maybe there are better ways
return tv.tv_sec * 1000 + tv.tv_usec/1000; // to do that, but at least it works
}
pascal void MacProcessSound(SndChannelPtr chan, SndCommand *cmd)
{
#pragma unused (chan, cmd)
if (soundQueued <= 0)
sndHeader.samplePtr = emptyBuffer;
else
{
sndHeader.samplePtr = soundBuffer[soundPlayAt];
soundPlayAt++;
if (soundPlayAt >= kMaxSoundBuffers/*macBufferCount*/)
soundPlayAt = 0;
soundQueued--;
}
SndCommand buffer = { bufferCmd, 0, (long) &sndHeader };
SndDoImmediate(sndChannel, &buffer);
SndCommand callback = { callBackCmd, 0, 0 };
SndDoCommand(sndChannel, &callback, true);
}
////////////////////////////////////////////////////////////////////////
// SETUP SOUND
////////////////////////////////////////////////////////////////////////
static int buffer_size;
void SetupSound(void)
{
int count;
callBackUPP = NewSndCallBackUPP(MacProcessSound);
if (sndChannel)
{
SndDisposeChannel(sndChannel, true);
sndChannel = nil;
}
buffer_size = 1;
while (buffer_size < (44100 / 60))
buffer_size <<= 1;
memset(&sndHeader, 0, sizeof(sndHeader));
sndHeader.numChannels = (iDisStereo ? 1 : 2);
sndHeader.sampleRate = 44100 << 16;
sndHeader.encode = cmpSH;
sndHeader.baseFrequency = kMiddleC;
sndHeader.numFrames = buffer_size;
sndHeader.sampleSize = 16;
#ifdef __POWERPC__
sndHeader.format = k16BitBigEndianFormat;
#else
sndHeader.format = k16BitLittleEndianFormat;
#endif
sndHeader.compressionID = fixedCompression;
if (soundBufferAt != -1)
{
free(soundBuffer[0]);
free(emptyBuffer);
}
soundBuffer[0] = (char *) calloc(buffer_size << 2, kMaxSoundBuffers);
for (count = 1; count <= kMaxSoundBuffers; count++)
soundBuffer[count] = soundBuffer[count-1] + (buffer_size << 2);
emptyBuffer = (char *) calloc(buffer_size << 2, 1);
soundBufferAt = soundPlayAt = soundQueued = 0;
bufferIndex = 0;
SndNewChannel(&sndChannel, sampledSynth, initStereo, callBackUPP);
SndCommand sndcmd;
UInt32 volume;
volume = (UInt32) (256.0 * (float) macSoundVolume / 100.0);
sndcmd.cmd = volumeCmd;
sndcmd.param1 = 0;
sndcmd.param2 = (volume << 16) | volume;
SndDoCommand(sndChannel, &sndcmd, true);
sndcmd.cmd = callBackCmd;
sndcmd.param1 = 0;
sndcmd.param2 = 0;
SndDoCommand(sndChannel, &sndcmd, true);
}
////////////////////////////////////////////////////////////////////////
// REMOVE SOUND
////////////////////////////////////////////////////////////////////////
void RemoveSound(void)
{
DisposeSndCallBackUPP(callBackUPP);
}
////////////////////////////////////////////////////////////////////////
// GET BYTES BUFFERED
////////////////////////////////////////////////////////////////////////
unsigned long SoundGetBytesBuffered(void)
{
int bytes;
int playAt = soundPlayAt;
if (soundBufferAt < playAt) {
bytes = (soundBuffer[kMaxSoundBuffers]-soundBuffer[playAt])+
(soundBuffer[soundBufferAt]-soundBuffer[0]);
} else {
bytes = soundBuffer[soundBufferAt]-soundBuffer[playAt];
}
//printf("sb=%i\n", bytes);
// if (bytes < SOUNDSIZE/2)
// return 0;
return bytes;
}
////////////////////////////////////////////////////////////////////////
// FEED SOUND DATA
////////////////////////////////////////////////////////////////////////
void SoundFeedStreamData(unsigned char* pSound,long lBytes)
{
int rem;
if (lBytes > (buffer_size<<2)*kMaxSoundBuffers) {
printf("sound feed overflow!\n");
return;
}
rem = soundBuffer[kMaxSoundBuffers]-(soundBuffer[soundBufferAt]+bufferIndex);
if (lBytes > rem) {
memcpy(soundBuffer[soundBufferAt]+bufferIndex, pSound, rem);
lBytes -= rem; pSound += rem;
soundQueued += kMaxSoundBuffers-soundBufferAt;
soundBufferAt = 0; bufferIndex = 0;
}
memcpy(soundBuffer[soundBufferAt]+bufferIndex, pSound, lBytes);
soundBufferAt += (lBytes+bufferIndex)/(buffer_size<<2);
soundQueued += (lBytes+bufferIndex)/(buffer_size<<2);
bufferIndex = (lBytes+bufferIndex)%(buffer_size<<2);
if (soundQueued >= kMaxSoundBuffers) {
printf("sound buffer overflow!\n");
}
}
#endif
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