added support for start play ft smush audio from middle of san file

svn-id: r11903

5 files changed, 47 insertions, 21 deletions

diff --git a/scumm/smush/channel.h b/scumm/smush/channel.h
index ecd9d1b8ac..722a6191d6 100644
--- a/scumm/smush/channel.h
+++ b/scumm/smush/channel.h
@@ -34,7 +34,7 @@ public:
 
 	virtual ~SmushChannel() {};
 	virtual bool appendData(Chunk &b, int32 size) = 0;
-	virtual bool setParameters(int32, int32, int32, int32) = 0;
+	virtual bool setParameters(int32, int32, int32, int32, int32) = 0;
 	virtual bool checkParameters(int32, int32, int32, int32, int32) = 0;
 	virtual bool isTerminated() const = 0;
 	virtual int32 availableSoundData() const = 0;
@@ -62,6 +62,7 @@ private:
 	int32 _tbufferSize;
 	byte *_sbuffer;
 	int32 _sbufferSize;
+	bool _keepSize;
 
 protected:
 	void handleStrk(Chunk &c);
@@ -75,7 +76,7 @@ public:
 	SaudChannel(int32 track, int32 freq);
 	virtual ~SaudChannel();
 	bool isTerminated() const;
-	bool setParameters(int32 duration, int32 flags, int32 vol1, int32 vol2);
+	bool setParameters(int32 duration, int32 flags, int32 vol1, int32 vol2, int32 index);
 	bool checkParameters(int32 index, int32 duration, int32 flags, int32 vol1, int32 vol2);
 	bool appendData(Chunk &b, int32 size);
 	int32 availableSoundData() const;
@@ -123,7 +124,7 @@ public:
 	ImuseChannel(int32 track, int32 freq);
 	virtual ~ImuseChannel();
 	bool isTerminated() const;
-	bool setParameters(int32 nbframes, int32 size, int32 track_flags, int32 unk1);
+	bool setParameters(int32 nbframes, int32 size, int32 track_flags, int32 unk1, int32);
 	bool checkParameters(int32 index, int32 nbframes, int32 size, int32 track_flags, int32 unk1);
 	bool appendData(Chunk &b, int32 size);
 	int32 availableSoundData() const;
diff --git a/scumm/smush/imuse_channel.cpp b/scumm/smush/imuse_channel.cpp
index 2b14390393..2c6762008c 100644
--- a/scumm/smush/imuse_channel.cpp
+++ b/scumm/smush/imuse_channel.cpp
@@ -51,7 +51,7 @@ bool ImuseChannel::isTerminated() const {
 	return (_dataSize <= 0 && _sbuffer == 0);
 }
 
-bool ImuseChannel::setParameters(int32 nb, int32 size, int32 flags, int32 unk1) {
+bool ImuseChannel::setParameters(int32 nb, int32 size, int32 flags, int32 unk1, int32) {
 	if ((flags == 1) || (flags == 2) || (flags == 3)) {
 		_volume = 127;
 	} else if ((flags >= 100) && (flags <= 163)) {
diff --git a/scumm/smush/saud_channel.cpp b/scumm/smush/saud_channel.cpp
index c06cee0ce1..e00ec873f9 100644
--- a/scumm/smush/saud_channel.cpp
+++ b/scumm/smush/saud_channel.cpp
@@ -95,7 +95,12 @@ bool SaudChannel::processBuffer() {
 	assert(_sbuffer == 0);
 	assert(_sbufferSize == 0);
 	
-	if (_inData) {
+	if (_keepSize) {
+		_sbufferSize = _tbufferSize;
+		_sbuffer = _tbuffer;
+		_tbufferSize = 0;
+		_tbuffer = 0;
+	} else if (_inData) {
 		if (_dataSize < _tbufferSize) {
 			int32 offset = _dataSize;
 			while (handleSubTags(offset));
@@ -104,7 +109,8 @@ bool SaudChannel::processBuffer() {
 			if (offset < _tbufferSize) {
 				int new_size = _tbufferSize - offset;
 				_tbuffer = new byte[new_size];
-				if (!_tbuffer)  error("SaudChannel failed to allocate memory");
+				if (!_tbuffer)
+					error("SaudChannel failed to allocate memory");
 				memcpy(_tbuffer, _sbuffer + offset, new_size);
 				_tbufferSize = new_size;
 			} else {
@@ -160,12 +166,13 @@ SaudChannel::SaudChannel(int32 track, int32 freq) :
 	_tbuffer(0),
 	_tbufferSize(0),
 	_sbuffer(0),
-	_sbufferSize(0)
-{
+	_sbufferSize(0),
+	_keepSize(false) {
 }
 
 SaudChannel::~SaudChannel() {
-	if (_tbuffer) delete []_tbuffer;
+	if (_tbuffer)
+		delete []_tbuffer;
 	if (_sbuffer) {
 		warning("this should never happen !!!! (_sbuffer not NULL here)");
 		delete []_sbuffer;
@@ -203,12 +210,17 @@ void SaudChannel::recalcVolumeTable() {
 	}
 }
 
-bool SaudChannel::setParameters(int32 nb, int32 flags, int32 volume, int32 balance) {
+bool SaudChannel::setParameters(int32 nb, int32 flags, int32 volume, int32 balance, int32 index) {
 	_nbframes = nb;
 	_flags = flags; // bit 7 == IS_VOICE, bit 6 == IS_BACKGROUND_MUSIC, other ??
 	_volume = volume;
 	_balance = balance;
-	_index = 0;
+	_index = index;
+	if (index != 0) {
+		_dataSize = -2;
+		_keepSize = true;
+		_inData = true;
+	}
 	recalcVolumeTable();
 	return true;
 }
@@ -231,16 +243,20 @@ bool SaudChannel::checkParameters(int32 index, int32 nb, int32 flags, int32 volu
 bool SaudChannel::appendData(Chunk &b, int32 size) {
 	if (_dataSize == -1) {
 		assert(size > 8);
-		Chunk::type saud_type = b.getDword(); saud_type = SWAP_BYTES_32(saud_type);
-		uint32 saud_size = b.getDword(); saud_size = SWAP_BYTES_32(saud_size);
-		if (saud_type != TYPE_SAUD) error("Invalid Chunk for SaudChannel : %X", saud_type);
+		Chunk::type saud_type = b.getDword();
+		saud_type = SWAP_BYTES_32(saud_type);
+		uint32 saud_size = b.getDword();
+		saud_size = SWAP_BYTES_32(saud_size);
+		if (saud_type != TYPE_SAUD)
+			error("Invalid Chunk for SaudChannel : %X", saud_type);
 		size -= 8;
 		_dataSize = -2;
 	}
 	if (_tbuffer) {
 		byte *old = _tbuffer;
 		_tbuffer = new byte[_tbufferSize + size];
-		if (!_tbuffer)  error("saud_channel failed to allocate memory");
+		if (!_tbuffer)
+			error("saud_channel failed to allocate memory");
 		memcpy(_tbuffer, old, _tbufferSize);
 		delete []old;
 		b.read(_tbuffer + _tbufferSize, size);
@@ -248,7 +264,8 @@ bool SaudChannel::appendData(Chunk &b, int32 size) {
 	} else {
 		_tbufferSize = size;
 		_tbuffer = new byte[_tbufferSize];
-		if (!_tbuffer)  error("saud_channel failed to allocate memory");
+		if (!_tbuffer)
+			error("saud_channel failed to allocate memory");
 		b.read(_tbuffer, _tbufferSize);
 	}
 	return processBuffer();
@@ -263,7 +280,8 @@ void SaudChannel::getSoundData(int16 *snd, int32 size) {
 		snd[2 * i] = _voltable[0][_sbuffer[i] ^ 0x80];
 		snd[2 * i + 1] = _voltable[1][_sbuffer[i] ^ 0x80];
 	}
-	_dataSize -= size;
+	if (!_keepSize)
+		_dataSize -= size;
 	delete []_sbuffer;
 	_sbuffer = 0;
 	_sbufferSize = 0;
diff --git a/scumm/smush/smush_player.cpp b/scumm/smush/smush_player.cpp
index 65684a4d5f..62bdaecbbd 100644
--- a/scumm/smush/smush_player.cpp
+++ b/scumm/smush/smush_player.cpp
@@ -233,6 +233,7 @@ SmushPlayer::SmushPlayer(ScummEngine *scumm, int speed, bool subtitles) {
 	_soundFrequency = 22050;
 	_speed = speed;
 	_insanity = false;
+	_midleAudio = false;
 }
 
 SmushPlayer::~SmushPlayer() {
@@ -315,11 +316,15 @@ void SmushPlayer::handleSoundBuffer(int32 track_id, int32 index, int32 max_frame
 		c = new SaudChannel(track_id, _soundFrequency);
 		_smixer->addChannel(c);
 	}
-	if (index == 0) {
-		c->setParameters(max_frames, flags, vol, bal);
-	}	else {
+
+	if ((_midleAudio) && (index != 0)) {
+		c->setParameters(max_frames, flags, vol, bal, index);
+	} else if (index == 0) {
+		c->setParameters(max_frames, flags, vol, bal, index);
+	} else {
 		c->checkParameters(index, max_frames, flags, vol, bal);
 	}
+	_midleAudio = false;
 	c->appendData(b, size);
 }
 
@@ -408,7 +413,7 @@ void SmushPlayer::handleIACT(Chunk &b) {
 			_smixer->addChannel(c);
 		}
 		if (index == 0)
-			c->setParameters(nbframes, size, track_flags, unknown);
+			c->setParameters(nbframes, size, track_flags, unknown, 0);
 		else
 			c->checkParameters(index, nbframes, size, track_flags, unknown);
 		c->appendData(b, bsize);
@@ -982,6 +987,7 @@ void SmushPlayer::seekSan(const char *file, const char *directory, int32 pos) {
 	if (pos != 8) {
 		_base->reinit();
 		_base->seek(pos, FileChunk::seek_start);
+		_midleAudio = true;
 	}
 
 	// FIXME: is this really applicable for FLU files? HACK
diff --git a/scumm/smush/smush_player.h b/scumm/smush/smush_player.h
index b119251552..5d9425a33a 100644
--- a/scumm/smush/smush_player.h
+++ b/scumm/smush/smush_player.h
@@ -68,6 +68,7 @@ private:
 	byte *_dst;
 	bool _updateNeeded;
 	bool _insanity;
+	bool _midleAudio;
 
 public:
 	SmushPlayer(ScummEngine *, int, bool);