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- syncThread version of DOSBox patch cleaned up and relies on synth's internal MIDI queue

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sergm
2013-08-03 21:23:02 +03:00
parent f95c3f9852
commit 8e710fd1fc
1 changed files with 2 additions and 38 deletions
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40
DOSBox-mt32-patch/syncThread/midi_mt32.h
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@@ -1,46 +1,14 @@
#include <mt32emu/mt32emu.h>
#include <SDL_thread.h>
#include <SDL_endian.h>
#include "mixer.h"
#include "control.h"
class RingBuffer {
private:
static const unsigned int bufferSize = 1024;
volatile unsigned int startpos;
volatile unsigned int endpos;
Bit32u ringBuffer[bufferSize];
public:
RingBuffer() {
startpos = 0;
endpos = 0;
}
bool put(Bit32u data) {
unsigned int newEndpos = endpos;
newEndpos++;
if (newEndpos == bufferSize) newEndpos = 0;
if (startpos == newEndpos) return false;
ringBuffer[endpos] = data;
endpos = newEndpos;
return true;
}
Bit32u get() {
if (startpos == endpos) return 0;
Bit32u data = ringBuffer[startpos];
startpos++;
if (startpos == bufferSize) startpos = 0;
return data;
}
};
static class MidiHandler_mt32 : public MidiHandler {
private:
static const Bitu MIXER_BUFFER_SIZE = MIXER_BUFSIZE >> 2;
MixerChannel *chan;
MT32Emu::Synth *synth;
RingBuffer midiBuffer;
SDL_Thread *thread;
SDL_mutex *synthMutex;
SDL_semaphore *procIdleSem, *mixerReqSem;
@@ -166,19 +134,15 @@ public:
}
void PlayMsg(Bit8u *msg) {
if (!midiBuffer.put(*(Bit32u *)msg)) LOG_MSG("MT32: Playback buffer full!");
synth->playMsg(SDL_SwapLE32(*(Bit32u *)msg));
}
void PlaySysex(Bit8u *sysex, Bitu len) {
if (renderInThread) SDL_LockMutex(synthMutex);
synth->playSysex(sysex, len);
if (renderInThread) SDL_UnlockMutex(synthMutex);
}
private:
void render(Bitu len, Bit16s *buf) {
Bit32u msg = midiBuffer.get();
if (msg != 0) synth->playMsg(msg);
synth->render(buf, len);
if (reverseStereo) {
Bit16s *revBuf = buf;