/[svn]/libgig/trunk/src/DLS.h
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revision 800 by schoenebeck, Wed Nov 9 20:04:11 2005 UTC revision 823 by schoenebeck, Fri Dec 23 01:38:50 2005 UTC
# Line 27  Line 27 
27  #include "RIFF.h"  #include "RIFF.h"
28    
29  #if WORDS_BIGENDIAN  #if WORDS_BIGENDIAN
30  # define RIFF_TYPE_DLS  0x646C7320  # define RIFF_TYPE_DLS  0x444C5320
31  # define LIST_TYPE_INFO 0x494E464F  # define LIST_TYPE_INFO 0x494E464F
32  # define LIST_TYPE_WVPL 0x7776706C  # define LIST_TYPE_WVPL 0x7776706C
33  # define LIST_TYPE_DWPL 0x6477706C  ///< Seen on some files instead of a wvpl list chunk.  # define LIST_TYPE_DWPL 0x6477706C  ///< Seen on some files instead of a wvpl list chunk.
# Line 69  Line 69 
69  # define CHUNK_ID_ARTL  0x6172746C  # define CHUNK_ID_ARTL  0x6172746C
70  # define CHUNK_ID_ART2  0x61727432  # define CHUNK_ID_ART2  0x61727432
71  #else  // little endian  #else  // little endian
72  # define RIFF_TYPE_DLS  0x20736C64  # define RIFF_TYPE_DLS  0x20534C44
73  # define LIST_TYPE_INFO 0x4F464E49  # define LIST_TYPE_INFO 0x4F464E49
74  # define LIST_TYPE_WVPL 0x6C707677  # define LIST_TYPE_WVPL 0x6C707677
75  # define LIST_TYPE_DWPL 0x6C707764  ///< Seen on some files instead of a wvpl list chunk.  # define LIST_TYPE_DWPL 0x6C707764  ///< Seen on some files instead of a wvpl list chunk.
# Line 317  namespace DLS { Line 317  namespace DLS {
317              String Commissioned;     ///< <ICMS-ck>. Lists the name of the person or organization that commissioned the subject of the file, e.g., Pope Julian II.              String Commissioned;     ///< <ICMS-ck>. Lists the name of the person or organization that commissioned the subject of the file, e.g., Pope Julian II.
318    
319              Info(RIFF::List* list);              Info(RIFF::List* list);
320                virtual ~Info();
321              virtual void UpdateChunks();              virtual void UpdateChunks();
322          private:          private:
323              RIFF::List* pResourceListChunk;              RIFF::List* pResourceListChunk;
# Line 364  namespace DLS { Line 365  namespace DLS {
365      /** @brief Encapsulates sample waves used for playback.      /** @brief Encapsulates sample waves used for playback.
366       *       *
367       * In case you created a new sample with File::AddSample(), you should       * In case you created a new sample with File::AddSample(), you should
368       * first call Resize() with the desired sample size. This will create       * first update all attributes with the desired meta informations
369         * (amount of channels, bit depth, sample rate, etc.), then call
370         * Resize() with the desired sample size. The latter will create
371       * the mandatory RIFF chunk which will hold the sample wave data.       * the mandatory RIFF chunk which will hold the sample wave data.
372       */       */
373      class Sample : public Resource {      class Sample : public Resource {
374          public:          public:
375              uint16_t      FormatTag;             ///< Format ID of the waveform data (should be WAVE_FORMAT_PCM for DLS1 compliant files).              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()).
376              uint16_t      Channels;              ///< Number of channels represented in the waveform data, e.g. 1 for mono, 2 for stereo ().              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).
377              uint32_t      SamplesPerSecond;      ///< Sampling rate at which each channel should be played.              uint32_t      SamplesPerSecond;      ///< Sampling rate at which each channel should be played (defaults to 44100 if Sample was created with Instrument::AddSample() previously).
378              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).
379              uint16_t      BlockAlign;            ///< The block alignment (in bytes) of the waveform data. Playback software needs to process a multiple of <i>BlockAlign</i> bytes of data at a time, so the value of <i>BlockAlign</i> can be used for buffer alignment.              uint16_t      BlockAlign;            ///< The block alignment (in bytes) of the waveform data. Playback software needs to process a multiple of <i>BlockAlign</i> bytes of data at a time, so the value of <i>BlockAlign</i> can be used for buffer alignment.
380              uint16_t      BitDepth;              ///< Size of each sample per channel (only if known sample data format is used, 0 otherwise).              uint16_t      BitDepth;              ///< Size of each sample per channel (only if known sample data format is used, 0 otherwise).
381              unsigned long SamplesTotal;          ///< Reflects total number of sample points (only if known sample data format is used, 0 otherwise), do not bother to change this value, it will not be saved.              unsigned long SamplesTotal;          ///< Reflects total number of sample points (only if known sample data format is used, 0 otherwise), do not bother to change this value, it will not be saved.
382              uint          FrameSize;             ///< Reflects the size (in bytes) of one single sample point (only if known sample data format is used, 0 otherwise).              uint          FrameSize;             ///< Reflects the size (in bytes) of one single sample point (only if known sample data format is used, 0 otherwise). <b>Caution:</b> with the current version of libgig you have to upate this field by yourself whenever you change one of the following fields: Channels, BitDepth ! Ignoring this might lead to undesired behavior when i.e. calling Resize(), SetPos(), Write() or Read().
383    
384              void*         LoadSampleData();              void*         LoadSampleData();
385              void          ReleaseSampleData();              void          ReleaseSampleData();
# Line 453  namespace DLS { Line 456  namespace DLS {
456              RegionList::iterator RegionsIterator;              RegionList::iterator RegionsIterator;
457    
458              Instrument(File* pFile, RIFF::List* insList);              Instrument(File* pFile, RIFF::List* insList);
459              void LoadRegions();              virtual void LoadRegions();
460              virtual ~Instrument();              virtual ~Instrument();
461              friend class File;              friend class File;
462      };      };
# Line 493  namespace DLS { Line 496  namespace DLS {
496              uint32_t*                pWavePoolTableHi;              uint32_t*                pWavePoolTableHi;
497              bool                     b64BitWavePoolOffsets;              bool                     b64BitWavePoolOffsets;
498    
499              void LoadSamples();              virtual void LoadSamples();
500              void LoadInstruments();              virtual void LoadInstruments();
501              void __ensureMandatoryChunksExist();              void __ensureMandatoryChunksExist();
502              friend class Region; // Region has to look in the wave pool table to get its sample              friend class Region; // Region has to look in the wave pool table to get its sample
503          private:          private:
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