/[svn]/libgig/trunk/src/DLS.h
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revision 928 by persson, Tue Oct 24 19:32:47 2006 UTC revision 1154 by schoenebeck, Wed Apr 11 16:33:56 2007 UTC
# Line 1  Line 1 
1  /***************************************************************************  /***************************************************************************
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file loader library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2005 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2007 by Christian Schoenebeck                      *
6   *                              <cuse@users.sourceforge.net>               *   *                              <cuse@users.sourceforge.net>               *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
# Line 112  Line 112 
112  # define CHUNK_ID_ART2  0x32747261  # define CHUNK_ID_ART2  0x32747261
113  #endif // WORDS_BIGENDIAN  #endif // WORDS_BIGENDIAN
114    
115  #define WAVE_FORMAT_PCM                 0x0001  #define DLS_WAVE_FORMAT_PCM                     0x0001
116    
117  //TODO: no support for conditional chunks <cdl> yet  //TODO: no support for conditional chunks <cdl> yet
118    
# Line 224  namespace DLS { Line 224  namespace DLS {
224    
225      /** Defines Sample Loop Points. */      /** Defines Sample Loop Points. */
226      struct sample_loop_t {      struct sample_loop_t {
227          uint32_t Size;          uint32_t Size;       ///< For internal usage only: usually reflects exactly @c sizeof(sample_loop_t), otherwise if the value is larger then the DLS format was extended!
228          uint32_t LoopType;          uint32_t LoopType;   ///< Defines how the waveform samples will be looped (appropriate loop types for the gig format are defined by gig::loop_type_t).
229          uint32_t LoopStart;          uint32_t LoopStart;  ///< The start value specifies the offset (in sample points) in the waveform data of the first sample point to be played in the loop.
230          uint32_t LoopLength;          uint32_t LoopLength; ///< Length of the looping area (in sample points).
231      };      };
232    
233      // just symbol prototyping      // just symbol prototyping
# Line 324  namespace DLS { Line 324  namespace DLS {
324          private:          private:
325              RIFF::List* pResourceListChunk;              RIFF::List* pResourceListChunk;
326    
327              void LoadString(uint32_t ChunkID, RIFF::List* lstINFO, String& s);              static void LoadString(uint32_t ChunkID, RIFF::List* lstINFO, String& s);
328              void SaveString(uint32_t ChunkID, RIFF::List* lstINFO, const String& s, const String& sDefault, int size);              static void SaveString(uint32_t ChunkID, RIFF::List* lstINFO, const String& s, const String& sDefault, bool bUseFixedLengthStrings, int size);
329      };      };
330    
331      /** Abstract base class which encapsulates data structures which all DLS resources are able to provide. */      /** Abstract base class which encapsulates data structures which all DLS resources are able to provide. */
# Line 355  namespace DLS { Line 355  namespace DLS {
355              uint32_t       SampleLoops;  ///< Reflects the number of sample loops.              uint32_t       SampleLoops;  ///< Reflects the number of sample loops.
356              sample_loop_t* pSampleLoops; ///< Points to the beginning of a sample loop array, or is NULL if there are no loops defined.              sample_loop_t* pSampleLoops; ///< Points to the beginning of a sample loop array, or is NULL if there are no loops defined.
357    
358                void AddSampleLoop(sample_loop_t* pLoopDef);
359                void DeleteSampleLoop(sample_loop_t* pLoopDef);
360              virtual void UpdateChunks();              virtual void UpdateChunks();
361          protected:          protected:
362              RIFF::List*    pParentList;              RIFF::List*    pParentList;
# Line 374  namespace DLS { Line 376  namespace DLS {
376       */       */
377      class Sample : public Resource {      class Sample : public Resource {
378          public:          public:
379              uint16_t      FormatTag;             ///< Format ID of the waveform data (should be WAVE_FORMAT_PCM for DLS1 compliant files, this is also the default value if Sample was created with Instrument::AddSample()).              uint16_t      FormatTag;             ///< Format ID of the waveform data (should be DLS_WAVE_FORMAT_PCM for DLS1 compliant files, this is also the default value if Sample was created with Instrument::AddSample()).
380              uint16_t      Channels;              ///< Number of channels represented in the waveform data, e.g. 1 for mono, 2 for stereo (defaults to 1=mono if Sample was created with Instrument::AddSample() previously).              uint16_t      Channels;              ///< Number of channels represented in the waveform data, e.g. 1 for mono, 2 for stereo (defaults to 1=mono if Sample was created with Instrument::AddSample() previously).
381              uint32_t      SamplesPerSecond;      ///< Sampling rate at which each channel should be played (defaults to 44100 if Sample was created with Instrument::AddSample() previously).              uint32_t      SamplesPerSecond;      ///< Sampling rate at which each channel should be played (defaults to 44100 if Sample was created with Instrument::AddSample() previously).
382              uint32_t      AverageBytesPerSecond; ///< The average number of bytes per second at which the waveform data should be transferred (Playback software can estimate the buffer size using this value).              uint32_t      AverageBytesPerSecond; ///< The average number of bytes per second at which the waveform data should be transferred (Playback software can estimate the buffer size using this value).
# Line 444  namespace DLS { Line 446  namespace DLS {
446              Region*  GetFirstRegion();              Region*  GetFirstRegion();
447              Region*  GetNextRegion();              Region*  GetNextRegion();
448              Region*  AddRegion();              Region*  AddRegion();
449                void     MoveRegion(Region* pSrc, Region* pDst);
450              void     DeleteRegion(Region* pRegion);              void     DeleteRegion(Region* pRegion);
451              virtual void UpdateChunks();              virtual void UpdateChunks();
452          protected:          protected:
# Line 508  namespace DLS { Line 511  namespace DLS {
511              void __UpdateWavePoolTable();              void __UpdateWavePoolTable();
512      };      };
513    
514      /** Will be thrown whenever a DLS specific error occurs while trying to access a DLS File. */      /**
515         * Will be thrown whenever a DLS specific error occurs while trying to
516         * access a DLS File. Note: In your application you should better catch
517         * for RIFF::Exception rather than this one, except you explicitly want
518         * to catch and handle DLS::Exception and RIFF::Exception independently,
519         * which usually shouldn't be necessary though.
520         */
521      class Exception : public RIFF::Exception {      class Exception : public RIFF::Exception {
522          public:          public:
523              Exception(String Message);              Exception(String Message);
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