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CrySoundSystem/OGGDecoder.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include "PatternDecoder.h"
+#include <vorbis/vorbisfile.h>
+
+struct IMusicSystem;
+class COGGDecoderInstance;
+
+struct SFileAccess
+{
+	SFileAccess()
+	{
+		pPak=NULL;
+		pFile=NULL;
+	}
+	SFileAccess(ICryPak *_pPak, FILE *_pFile)
+	{
+		pPak=_pPak;
+		pFile=_pFile;
+	}
+	ICryPak *pPak;
+	FILE *pFile;
+};
+
+class COGGDecoder :	public IMusicPatternDecoder
+{
+protected:
+	IMusicSystem *m_pMusicSystem;
+	SFileAccess m_FileAccess;
+	SMusicPatternFileInfo m_FileInfo;
+	friend class COGGDecoderInstance;
+protected:
+	virtual ~COGGDecoder();
+public:
+	COGGDecoder(IMusicSystem *pMusicSystem);
+	void Release() { delete this; }
+	//! Open a music-pattern-file.
+	bool Open(const char *pszFilename);
+	//! Close a music-pattern-file.
+	bool Close();
+	//! Retrieve file-info
+	bool GetFileInfo(SMusicPatternFileInfo &FileInfo);
+	//! Retrieve mem-info
+	void GetMemoryUsage(class ICrySizer* pSizer);
+	//! Create instance.
+	IMusicPatternDecoderInstance* CreateInstance();
+};
+
+class COGGDecoderInstance : public IMusicPatternDecoderInstance
+{
+protected:
+	COGGDecoder *m_pDecoder;
+	int m_nPos;	// position in samples
+	int m_nPosBytes;
+	OggVorbis_File m_OVFile;
+private:
+	bool FillPCMBuffer(signed long *pBuffer, int nSamples);
+public:
+	static size_t ReadFile(void *ptr, size_t size, size_t nmemb, void *datasource);
+	static int SeekFile(void *datasource, ogg_int64_t offset, int whence);
+	static int CloseFile(void *datasource);
+	static long TellFile(void *datasource);
+protected:
+	virtual ~COGGDecoderInstance();
+public:
+	COGGDecoderInstance(COGGDecoder *pDecoder);
+	void Release() { delete this; }
+	//! Seek to beginning of pattern (if nDelay is set it will wait nDelay-samples before starting playback).
+	bool Seek0(int nDelay=0);
+	//! Retrieve the current position in the file (in samples)
+	int GetPos();
+	//! Decode and retrieve pcm-data (stereo/16bit).
+	bool GetPCMData(signed long *pDataOut, int nSamples, bool bLoop=true);
+};