Fixed initialization of some SoundMgr-class's member variables. Moved _sndBuffer's allocation to SoundMgr's constructor and its deallocation to the destructor. Made fillAudio SoundMgr's method and removed a superfluous global static variable 'int16 *buffer'. Should help with the occasional crashes when starting the first sound in an AGI game.

svn-id: r33822

1 files changed, 10 insertions, 11 deletions

diff --git a/engines/agi/sound.cpp b/engines/agi/sound.cpp
index cfa87d2c98..9fe8fbf41a 100644
--- a/engines/agi/sound.cpp
+++ b/engines/agi/sound.cpp
@@ -435,13 +435,10 @@ void IIgsMidiChannel::stopSounds() {
 	_gsChannels.clear();
 }
 
-static int16 *buffer;
-
 int SoundMgr::initSound() {
 	int r = -1;
 
-	buffer = _sndBuffer = (int16 *)calloc(2, BUFFER_SIZE);
-
+	memset(_sndBuffer, 0, BUFFER_SIZE << 1);
 	_env = false;
 
 	switch (_vm->_soundemu) {
@@ -478,7 +475,6 @@ int SoundMgr::initSound() {
 void SoundMgr::deinitSound() {
 	debugC(3, kDebugLevelSound, "()");
 	_mixer->stopHandle(_soundHandle);
-	free(_sndBuffer);
 }
 
 void SoundMgr::stopNote(int i) {
@@ -1185,7 +1181,7 @@ bool SoundMgr::loadInstruments() {
 	return _gsSound.loadWaveFile(waveFsnode->getPath(), *exeInfo) && _gsSound.loadInstrumentHeaders(exeFsnode->getPath(), *exeInfo);
 }
 
-static void fillAudio(void *udata, int16 *stream, uint len) {
+void SoundMgr::fillAudio(void *udata, int16 *stream, uint len) {
 	SoundMgr *soundMgr = (SoundMgr *)udata;
 	uint32 p = 0;
 	static uint32 n = 0, s = 0;
@@ -1193,22 +1189,22 @@ static void fillAudio(void *udata, int16 *stream, uint len) {
 	len <<= 2;
 
 	debugC(5, kDebugLevelSound, "(%p, %p, %d)", (void *)udata, (void *)stream, len);
-	memcpy(stream, (uint8 *)buffer + s, p = n);
+	memcpy(stream, (uint8 *)_sndBuffer + s, p = n);
 	for (n = 0, len -= p; n < len; p += n, len -= n) {
 		soundMgr->playSound();
 		n = soundMgr->mixSound() << 1;
 		if (len < n) {
-			memcpy((uint8 *)stream + p, buffer, len);
+			memcpy((uint8 *)stream + p, _sndBuffer, len);
 			s = len;
 			n -= s;
 			return;
 		} else {
-			memcpy((uint8 *)stream + p, buffer, n);
+			memcpy((uint8 *)stream + p, _sndBuffer, n);
 		}
 	}
 	soundMgr->playSound();
 	n = soundMgr->mixSound() << 1;
-	memcpy((uint8 *)stream + p, buffer, s = len);
+	memcpy((uint8 *)stream + p, _sndBuffer, s = len);
 	n -= s;
 }
 
@@ -1218,7 +1214,9 @@ SoundMgr::SoundMgr(AgiBase *agi, Audio::Mixer *pMixer) : _chn() {
 	_sampleRate = pMixer->getOutputRate();
 	_endflag = -1;
 	_playingSound = -1;
-	_sndBuffer = 0;
+	_env = false;
+	_playing = false;
+	_sndBuffer = (int16 *)calloc(2, BUFFER_SIZE);
 	_waveform = 0;
 }
 
@@ -1231,6 +1229,7 @@ void SoundMgr::setVolume(uint8 volume) {
 }
 
 SoundMgr::~SoundMgr() {
+	free(_sndBuffer);
 }
 
 } // End of namespace Agi