implemented raw sound looping; some debug output enabled temporarily

svn-id: r9360

sound/audiostream.cpp

@@ -40,7 +40,7 @@ static inline int16 readSample(const byte *ptr) {
 
 
 template<bool stereo, bool is16Bit, bool isUnsigned>
-class LinearMemoryStream : public AudioInputStream {
+class LinearMemoryStream : public LinearAudioInputStream {
 protected:
 	const byte *_ptr;
 	const byte *_end;
@@ -58,11 +58,17 @@ public:
 		return val;
 	}
 	bool eof() const {
-		return _end <= _ptr;
+		return _ptr >= _end;
 	}
 	bool isStereo() const {
 		return stereo;
 	}
+	void reset(const byte *data, uint32 len) {
+		_ptr = data;
+		_end = data + len;
+		if (stereo)	// Stereo requires even sized data
+			assert(len % 2 == 0);
+	}
 };
 
 
@@ -413,7 +419,7 @@ void VorbisInputStream::refill() {
 
 
 template<bool stereo>
-static AudioInputStream *makeLinearInputStream(const byte *ptr, uint32 len, bool is16Bit, bool isUnsigned) {
+static LinearAudioInputStream *makeLinearInputStream(const byte *ptr, uint32 len, bool is16Bit, bool isUnsigned) {
 	if (isUnsigned) {
 		if (is16Bit)
 			return new LinearMemoryStream<stereo, true, true>(ptr, len);
@@ -444,7 +450,7 @@ static WrappedAudioInputStream *makeWrappedInputStream(uint32 len, bool is16Bit,
 }
 
 
-AudioInputStream *makeLinearInputStream(byte _flags, const byte *ptr, uint32 len) {
+LinearAudioInputStream *makeLinearInputStream(byte _flags, const byte *ptr, uint32 len) {
 	const bool is16Bit = (_flags & SoundMixer::FLAG_16BITS) != 0;
 	const bool isUnsigned = (_flags & SoundMixer::FLAG_UNSIGNED) != 0;
 	if (_flags & SoundMixer::FLAG_STEREO) {

sound/audiostream.h

@@ -53,6 +53,11 @@ public:
 	virtual bool eof() const = 0;
 };
 
+class LinearAudioInputStream : public AudioInputStream {
+public:
+	virtual void reset(const byte *data, uint32 len) = 0;
+};
+
 class WrappedAudioInputStream : public AudioInputStream {
 public:
 	virtual void append(const byte *data, uint32 len) = 0;
@@ -118,7 +123,7 @@ public:
 
 
 
-AudioInputStream *makeLinearInputStream(byte _flags, const byte *ptr, uint32 len);
+LinearAudioInputStream *makeLinearInputStream(byte _flags, const byte *ptr, uint32 len);
 WrappedAudioInputStream *makeWrappedInputStream(byte _flags, uint32 len);
 
 

sound/mixer.cpp

@@ -67,19 +67,19 @@ class ChannelRaw : public Channel {
 	byte _flags;
 #ifdef SOX_HACK
 	RateConverter *_converter;
-	AudioInputStream *_input;
+	LinearAudioInputStream *_input;
 #else
 	uint32 _pos;
 	uint32 _size;
 	uint32 _fpSpeed;
 	uint32 _fpPos;
 	uint32 _realSize, _rate;
+#endif
 	byte *_loop_ptr;
 	uint32 _loop_size;
-#endif
 
 public:
-	ChannelRaw(SoundMixer *mixer, PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id);
+	ChannelRaw(SoundMixer *mixer, PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id, uint32 loopStart, uint32 loopEnd);
 	~ChannelRaw();
 
 	void mix(int16 *data, uint len);
@@ -272,7 +272,7 @@ int SoundMixer::insertChannel(PlayingSoundHandle *handle, Channel *chan) {
 	return index;
 }
 
-int SoundMixer::playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id) {
+int SoundMixer::playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id, uint32 loopStart, uint32 loopEnd) {
 	StackLock lock(_mutex);
 
 	// Prevent duplicate sounds
@@ -282,7 +282,7 @@ int SoundMixer::playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, ui
 				return -1;
 	}
 
-	return insertChannel(handle, new ChannelRaw(this, handle, sound, size, rate, flags, id));
+	return insertChannel(handle, new ChannelRaw(this, handle, sound, size, rate, flags, id, loopStart, loopEnd));
 }
 
 #ifdef USE_MAD
@@ -651,7 +651,7 @@ static int16 mixer_element_size[] = {
 #endif
 
 /* RAW mixer */
-ChannelRaw::ChannelRaw(SoundMixer *mixer, PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id)
+ChannelRaw::ChannelRaw(SoundMixer *mixer, PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id, uint32 loopStart, uint32 loopEnd)
 	: Channel(mixer, handle) {
 	_id = id;
 	_ptr = (byte *)sound;
@@ -665,6 +665,23 @@ ChannelRaw::ChannelRaw(SoundMixer *mixer, PlayingSoundHandle *handle, void *soun
 
 	// Get a rate converter instance
 	_converter = makeRateConverter(rate, mixer->getOutputRate(), _input->isStereo());
+	printf("   data has %d bits and is %s\n",
+			((flags & SoundMixer::FLAG_16BITS) ? 16 : 8),
+			((flags & SoundMixer::FLAG_UNSIGNED) ? "unsigned" : "signed"));
+
+	if (flags & SoundMixer::FLAG_LOOP) {
+		if (loopEnd == 0) {
+			_loop_ptr = _ptr;
+			_loop_size = size;
+		} else {
+			assert(loopStart < loopEnd && loopEnd <= size);
+			_loop_ptr = _ptr + loopStart;
+			_loop_size = loopEnd - loopStart;
+		}
+	} else {
+		_loop_ptr = 0;
+		_loop_size = 0;
+	}
 #else
 	_pos = 0;
 	_fpPos = 0;
@@ -705,9 +722,13 @@ void ChannelRaw::mix(int16 *data, uint len) {
 
 	if (_input->eof()) {
 		// TODO: call drain method
-		// TODO: Looping
+		// Loop if requested
-		destroy();
+		if (_loop_ptr) {
-		return;
+			_input->reset(_loop_ptr, _loop_size);
+		} else {
+			destroy();
+			return;
+		}
 	}
 
 	const int volume = _mixer->getVolume();
@@ -756,6 +777,9 @@ ChannelStream::ChannelStream(SoundMixer *mixer, PlayingSoundHandle *handle, void
 
 	// Get a rate converter instance
 	_converter = makeRateConverter(rate, mixer->getOutputRate(), _input->isStereo());
+	printf("   data has %d bits and is %s\n",
+			((flags & SoundMixer::FLAG_16BITS) ? 16 : 8),
+			((flags & SoundMixer::FLAG_UNSIGNED) ? "unsigned" : "signed"));
 #else
 	_flags = flags;
 	_bufferSize = buffer_size;

sound/mixer.h

@@ -82,7 +82,8 @@ public:
 	~SoundMixer();
 
 	// start playing a raw sound
-	int playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id = -1);
+	int playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags,
+				int id = -1, uint32 loopStart = 0, uint32 loopEnd = 0);
 #ifdef USE_MAD
 	int playMP3(PlayingSoundHandle *handle, File *file, uint32 size);
 	int playMP3CDTrack(PlayingSoundHandle *handle, File *file, mad_timer_t duration);

sound/rate.h

@@ -94,7 +94,7 @@ public:
 };
 
 static inline RateConverter *makeRateConverter(st_rate_t inrate, st_rate_t outrate, bool stereo) {
-//	printf("makeRateConverter: inrate %d, outrate %d\n", inrate, outrate);
+printf("makeRateConverter: inrate %d, outrate %d, %s\n", inrate, outrate, (stereo ? "stereo" : "mono"));
 	if (inrate != outrate) {
 		return new LinearRateConverter(inrate, outrate);
 		//return new ResampleRateConverter(inrate, outrate, 1);