SCI: Moved audio code from AudioResource to the sfx core.

svn-id: r41486

2 files changed, 209 insertions, 14 deletions

diff --git a/engines/sci/sfx/core.cpp b/engines/sci/sfx/core.cpp
index e37007bf8e..9bf7730fc9 100644
--- a/engines/sci/sfx/core.cpp
+++ b/engines/sci/sfx/core.cpp
@@ -348,11 +348,13 @@ SfxState::SfxState() {
 	_flags = 0;
 	_song = NULL;
 	_suspended = 0;
-	_soundSync = 0;
-	_audioResource = 0;
+	_syncResource = NULL;
+	_audioRate = 11025;
 }
 
 SfxState::~SfxState() {
+	if (_syncResource)
+		_resMgr->unlockResource(_syncResource);
 }
 
 
@@ -526,7 +528,7 @@ void SfxState::updateSingleSong() {
 			debugMessage += " none\n";
 		}
 
-		debugC(2, kDebugLevelSound, debugMessage.c_str());
+		debugC(2, kDebugLevelSound, "%s", debugMessage.c_str());
 				
 		_song = newsong;
 		thawTime(); /* Recover song delay time */
@@ -641,8 +643,8 @@ void SfxState::sfx_init(ResourceManager *resmgr, int flags) {
 	_songlib._lib = 0;
 	_song = NULL;
 	_flags = flags;
-	_soundSync = NULL;
-	_audioResource = NULL;
+	_syncResource = NULL;
+	_syncOffset = 0;
 
 	player = NULL;
 
@@ -676,6 +678,8 @@ void SfxState::sfx_init(ResourceManager *resmgr, int flags) {
 		delete player;
 		player = NULL;
 	}
+
+	_resMgr = resmgr;
 }
 
 void SfxState::sfx_exit() {
@@ -689,12 +693,6 @@ void SfxState::sfx_exit() {
 	g_system->getMixer()->stopAll();
 
 	_songlib.freeSounds();
-
-	// Delete audio resources for CD talkie games
-	if (_audioResource) {
-		delete _audioResource;
-		_audioResource = 0;
-	}
 }
 
 void SfxState::sfx_suspend(bool suspend) {
@@ -1004,4 +1002,187 @@ void SfxState::sfx_all_stop() {
 	update();
 }
 
+int SfxState::startAudio(uint16 module, uint32 number) {
+	int sampleLen;
+	Audio::AudioStream *audioStream = getAudioStream(number, module, &sampleLen);
+
+	if (audioStream) {
+		g_system->getMixer()->playInputStream(Audio::Mixer::kSpeechSoundType, &_audioHandle, audioStream);
+		return sampleLen;
+	}
+
+	return 0;
+}
+
+int SfxState::getAudioPosition() {
+	if (g_system->getMixer()->isSoundHandleActive(_audioHandle))
+		return g_system->getMixer()->getSoundElapsedTime(_audioHandle) * 6 / 100; // return elapsed time in ticks
+	else
+		return -1; // Sound finished
+}
+
+enum SolFlags {
+	kSolFlagCompressed = 1 << 0,
+	kSolFlagUnknown    = 1 << 1,
+	kSolFlag16Bit      = 1 << 2,
+	kSolFlagIsSigned   = 1 << 3
+};
+
+// FIXME: Move this to sound/adpcm.cpp?
+// Note that the 16-bit version is also used in coktelvideo.cpp
+static const uint16 tableDPCM16[128] = {
+	0x0000, 0x0008, 0x0010, 0x0020, 0x0030, 0x0040, 0x0050, 0x0060, 0x0070, 0x0080,
+	0x0090, 0x00A0, 0x00B0, 0x00C0, 0x00D0, 0x00E0, 0x00F0, 0x0100, 0x0110, 0x0120,
+	0x0130, 0x0140, 0x0150, 0x0160, 0x0170, 0x0180, 0x0190, 0x01A0, 0x01B0, 0x01C0,
+	0x01D0, 0x01E0, 0x01F0, 0x0200, 0x0208, 0x0210, 0x0218, 0x0220, 0x0228, 0x0230,
+	0x0238, 0x0240, 0x0248, 0x0250, 0x0258, 0x0260, 0x0268, 0x0270, 0x0278, 0x0280,
+	0x0288, 0x0290, 0x0298, 0x02A0, 0x02A8, 0x02B0, 0x02B8, 0x02C0, 0x02C8, 0x02D0,
+	0x02D8, 0x02E0, 0x02E8, 0x02F0, 0x02F8, 0x0300, 0x0308, 0x0310, 0x0318, 0x0320,
+	0x0328, 0x0330, 0x0338, 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370,
+	0x0378, 0x0380, 0x0388, 0x0390, 0x0398, 0x03A0, 0x03A8, 0x03B0, 0x03B8, 0x03C0,
+	0x03C8, 0x03D0, 0x03D8, 0x03E0, 0x03E8, 0x03F0, 0x03F8, 0x0400, 0x0440, 0x0480,
+	0x04C0, 0x0500, 0x0540, 0x0580, 0x05C0, 0x0600, 0x0640, 0x0680, 0x06C0, 0x0700,
+	0x0740, 0x0780, 0x07C0, 0x0800, 0x0900, 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00,
+	0x0F00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
+};
+
+static const byte tableDPCM8[8] = {0, 1, 2, 3, 6, 10, 15, 21};
+
+static void deDPCM16(byte *soundBuf, Common::SeekableReadStream &audioStream, uint32 n) {
+	int16 *out = (int16 *) soundBuf;
+
+	int32 s = 0;
+	for (uint32 i = 0; i < n; i++) {
+		byte b = audioStream.readByte();
+		if (b & 0x80)
+			s -= tableDPCM16[b & 0x7f];
+		else
+			s += tableDPCM16[b];
+
+		s = CLIP<int32>(s, -32768, 32767);
+		*out++ = TO_BE_16(s);
+	}
+}
+
+static void deDPCM8Nibble(byte *soundBuf, int32 &s, byte b) {
+	if (b & 8)
+		s -= tableDPCM8[7 - (b & 7)];
+	else
+		s += tableDPCM8[b & 7];
+	s = CLIP<int32>(s, 0, 255);
+	*soundBuf = s;
+}
+
+static void deDPCM8(byte *soundBuf, Common::SeekableReadStream &audioStream, uint32 n) {
+	int32 s = 0x80;
+
+	for (uint i = 0; i < n; i++) {
+		byte b = audioStream.readByte();
+
+		deDPCM8Nibble(soundBuf++, s, b >> 4);
+		deDPCM8Nibble(soundBuf++, s, b & 0xf);
+	}
+}
+
+// Sierra SOL audio file reader
+// Check here for more info: http://wiki.multimedia.cx/index.php?title=Sierra_Audio
+static bool readSOLHeader(Common::SeekableReadStream *audioStream, int headerSize, uint32 &size, uint16 &audioRate, byte &audioFlags) {
+	if (headerSize != 11 && headerSize != 12) {
+		warning("SOL audio header of size %i not supported", headerSize);
+		return false;
+	}
+
+	audioStream->readUint32LE();			// skip "SOL" + 0 (4 bytes)
+	audioRate = audioStream->readUint16LE();
+	audioFlags = audioStream->readByte();
+
+	size = audioStream->readUint32LE();
+	return true;
+}
+
+static byte* readSOLAudio(Common::SeekableReadStream *audioStream, uint32 &size, byte audioFlags, byte &flags) {
+	byte *buffer;
+
+	// Convert the SOL stream flags to our own format
+	flags = 0;
+	if (audioFlags & kSolFlag16Bit)
+		flags |= Audio::Mixer::FLAG_16BITS;
+	if (!(audioFlags & kSolFlagIsSigned))
+		flags |= Audio::Mixer::FLAG_UNSIGNED;
+
+	if (audioFlags & kSolFlagCompressed) {
+		buffer = (byte *)malloc(size * 2);
+
+		if (audioFlags & kSolFlag16Bit)
+			deDPCM16(buffer, *audioStream, size);
+		else
+			deDPCM8(buffer, *audioStream, size);
+
+		size *= 2;
+	} else {
+		// We assume that the sound data is raw PCM
+		buffer = (byte *)malloc(size);
+		audioStream->read(buffer, size);
+	}
+
+	return buffer;
+}
+
+Audio::AudioStream* SfxState::getAudioStream(uint32 number, uint32 volume, int *sampleLen) {
+	Audio::AudioStream *audioStream = 0;
+	uint32 size;
+	byte *data = 0;
+	byte flags = 0;
+	Sci::Resource* audioRes;
+
+	if (volume == 65535) {
+		audioRes = _resMgr->findResource(ResourceId(kResourceTypeAudio, number), false);
+		if (!audioRes) {
+			warning("Failed to find audio entry %i", number);
+			return NULL;
+		}
+	} else {
+		audioRes = _resMgr->findResource(ResourceId(kResourceTypeAudio36, volume, number), false);
+		if (!audioRes) {
+			warning("Failed to find audio entry (%i, %i, %i, %i, %i)", volume, (number >> 24) & 0xff,
+					(number >> 16) & 0xff, (number >> 8) & 0xff, number & 0xff);
+			return NULL;
+		}
+	}
+
+	byte audioFlags;
+
+	if (audioRes->headerSize > 0) {
+		// SCI1.1
+		Common::MemoryReadStream *headerStream = 
+			new Common::MemoryReadStream(audioRes->header, audioRes->headerSize, false);
+
+		if (readSOLHeader(headerStream, audioRes->headerSize, size, _audioRate, audioFlags)) {
+			Common::MemoryReadStream *dataStream = 
+				new Common::MemoryReadStream(audioRes->data, audioRes->size, false);
+			data = readSOLAudio(dataStream, size, audioFlags, flags);
+			delete dataStream;
+		}
+		delete headerStream;
+	} else {
+		// SCI1
+		size = audioRes->size;
+		data = (byte *)malloc(size);
+		assert(data);
+		memcpy(data, audioRes->data, size);
+		flags = Audio::Mixer::FLAG_UNSIGNED;
+	}
+
+	if (data) {
+		audioStream = Audio::makeLinearInputStream(data, size, _audioRate, 
+										flags | Audio::Mixer::FLAG_AUTOFREE, 0, 0);
+		if (audioStream) {
+			*sampleLen = (flags & Audio::Mixer::FLAG_16BITS ? size >> 1 : size) * 60 / _audioRate;
+			return audioStream;
+		}
+	}
+
+	return NULL;
+}
+
 } // End of namespace Sci
diff --git a/engines/sci/sfx/core.h b/engines/sci/sfx/core.h
index 5db56bd864..e7eba85c99 100644
--- a/engines/sci/sfx/core.h
+++ b/engines/sci/sfx/core.h
@@ -50,8 +50,9 @@ public:	// FIXME, make private
 	SongLibrary _songlib; /**< Song library */
 	Song *_song; /**< Active song, or start of active song chain */
 	bool _suspended; /**< Whether we are suspended */
-	ResourceSync *_soundSync; /**< Used by kDoSync for speech syncing in CD talkie games */
-	AudioResource *_audioResource; /**< Used for audio resources in CD talkie games */
+	Resource *_syncResource; /**< Used by kDoSync for speech syncing in CD talkie games */
+	uint _syncOffset;
+	ResourceManager *_resMgr;
 
 public:
 	SfxState();
@@ -164,6 +165,15 @@ public:
 	Common::Error sfx_send_midi(SongHandle handle, int channel,
 		int command, int arg1, int arg2);
 
+	// Functions for digital sound
+	void setAudioRate(uint16 rate) { _audioRate = rate; }
+	Audio::SoundHandle* getAudioHandle() { return &_audioHandle; }
+	int getAudioPosition();
+	int startAudio(uint16 module, uint32 tuple);
+	void stopAudio() { g_system->getMixer()->stopHandle(_audioHandle); }
+	void pauseAudio() { g_system->getMixer()->pauseHandle(_audioHandle, true); }
+	void resumeAudio() { g_system->getMixer()->pauseHandle(_audioHandle, false); }
+
 protected:
 	void freezeTime();
 	void thawTime();
@@ -173,8 +183,12 @@ protected:
 	void updateSingleSong();
 	void updateMultiSong();
 	void update();
-};
 
+private:
+	uint16 _audioRate;
+	Audio::SoundHandle _audioHandle;
+	Audio::AudioStream* getAudioStream(uint32 number, uint32 volume, int *sampleLen);
+};
 
 } // End of namespace Sci