synced code free space with buffer changes

svn-id: r13646

1 files changed, 21 insertions, 11 deletions

diff --git a/sound/audiostream.cpp b/sound/audiostream.cpp
index 02889fc714..26d7892e07 100644
--- a/sound/audiostream.cpp
+++ b/sound/audiostream.cpp
@@ -198,8 +198,10 @@ protected:
 	byte *_end;
 	bool _finalized;
 	const int _rate;
+	uint32 _freeSpace;
 
 	inline bool eosIntern() const { return _end == _pos; };
+	void updateFreeSpace();
 public:
 	AppendableMemoryStream(int rate, uint bufferSize);
 	~AppendableMemoryStream()		{ free(_bufferStart); }
@@ -217,6 +219,16 @@ public:
 	uint32 getFreeSpace();
 };
 
+template<bool stereo, bool is16Bit, bool isUnsigned>
+void AppendableMemoryStream<stereo, is16Bit, isUnsigned>::updateFreeSpace() {
+	if (_pos <= _end) {
+		uint32 free_from_end = _bufferEnd - _end;
+		uint32 free_to_pos = _pos - _bufferStart;
+		_freeSpace = free_from_end + free_to_pos;
+	} else {
+		_freeSpace = _pos - _end;
+	}
+}
 
 template<bool stereo, bool is16Bit, bool isUnsigned>
 AppendableMemoryStream<stereo, is16Bit, isUnsigned>::AppendableMemoryStream(int rate, uint bufferSize)
@@ -231,6 +243,8 @@ AppendableMemoryStream<stereo, is16Bit, isUnsigned>::AppendableMemoryStream(int
 	_bufferStart = (byte *)malloc(bufferSize);
 	_pos = _end = _bufferStart;
 	_bufferEnd = _bufferStart + bufferSize;
+
+	updateFreeSpace();
 }
 
 template<bool stereo, bool is16Bit, bool isUnsigned>
@@ -244,6 +258,8 @@ inline int16 AppendableMemoryStream<stereo, is16Bit, isUnsigned>::read() {
 	int16 val = READSAMPLE(is16Bit, isUnsigned, _pos);
 	_pos += (is16Bit ? 2 : 1);
 
+	updateFreeSpace();
+
 	return val;
 }
 
@@ -263,6 +279,9 @@ int AppendableMemoryStream<stereo, is16Bit, isUnsigned>::readBuffer(int16 *buffe
 			samples++;
 		}
 	}
+
+	updateFreeSpace();
+
 	return samples;
 }
 
@@ -297,21 +316,12 @@ void AppendableMemoryStream<stereo, is16Bit, isUnsigned>::append(const byte *dat
 		memcpy(_end, data, len);
 		_end += len;
 	}
+	updateFreeSpace();
 }
 
 template<bool stereo, bool is16Bit, bool isUnsigned>
 uint32 AppendableMemoryStream<stereo, is16Bit, isUnsigned>::getFreeSpace() {
-	uint32 free;
-
-	if (_pos <= _end) {
-		uint32 free_from_end = _bufferEnd - _end;
-		uint32 free_to_pos = _pos - _bufferStart;
-		free = free_from_end + free_to_pos;
-	} else {
-		free = _pos - _end;
-	}
-	
-	return free;
+	return _freeSpace;
 }
 
 #pragma mark -