git.r.bdr.sh - rbdr/super-polarity/blob

   1 /*
   2  * This source code is public domain.
   3  *
   4  * Authors: Kenton Varda <temporal@gauge3d.org> (C interface wrapper)
   5  */
   6
   7 #ifndef MODPLUG_H__INCLUDED
   8 #define MODPLUG_H__INCLUDED
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 struct _ModPlugFile;
  15 typedef struct _ModPlugFile ModPlugFile;
  16
  17 struct _ModPlugNote {
  18         unsigned char Note;
  19         unsigned char Instrument;
  20         unsigned char VolumeEffect;
  21         unsigned char Effect;
  22         unsigned char Volume;
  23         unsigned char Parameter;
  24 };
  25 typedef struct _ModPlugNote ModPlugNote;
  26
  27 typedef void (*ModPlugMixerProc)(int*, unsigned long, unsigned long);
  28
  29 /* Load a mod file.  [data] should point to a block of memory containing the complete
  30  * file, and [size] should be the size of that block.
  31  * Return the loaded mod file on success, or NULL on failure. */
  32 ModPlugFile* ModPlug_Load(const void* data, int size);
  33 /* Unload a mod file. */
  34 void ModPlug_Unload(ModPlugFile* file);
  35
  36 /* Read sample data into the buffer.  Returns the number of bytes read.  If the end
  37  * of the mod has been reached, zero is returned. */
  38 int  ModPlug_Read(ModPlugFile* file, void* buffer, int size);
  39
  40 /* Get the name of the mod.  The returned buffer is stored within the ModPlugFile
  41  * structure and will remain valid until you unload the file. */
  42 const char* ModPlug_GetName(ModPlugFile* file);
  43
  44 /* Get the length of the mod, in milliseconds.  Note that this result is not always
  45  * accurate, especially in the case of mods with loops. */
  46 int ModPlug_GetLength(ModPlugFile* file);
  47
  48 /* Seek to a particular position in the song.  Note that seeking and MODs don't mix very
  49  * well.  Some mods will be missing instruments for a short time after a seek, as ModPlug
  50  * does not scan the sequence backwards to find out which instruments were supposed to be
  51  * playing at that time.  (Doing so would be difficult and not very reliable.)  Also,
  52  * note that seeking is not very exact in some mods -- especially those for which
  53  * ModPlug_GetLength() does not report the full length. */
  54 void ModPlug_Seek(ModPlugFile* file, int millisecond);
  55
  56 enum _ModPlug_Flags
  57 {
  58         MODPLUG_ENABLE_OVERSAMPLING     = 1 << 0,  /* Enable oversampling (*highly* recommended) */
  59         MODPLUG_ENABLE_NOISE_REDUCTION  = 1 << 1,  /* Enable noise reduction */
  60         MODPLUG_ENABLE_REVERB           = 1 << 2,  /* Enable reverb */
  61         MODPLUG_ENABLE_MEGABASS         = 1 << 3,  /* Enable megabass */
  62         MODPLUG_ENABLE_SURROUND         = 1 << 4   /* Enable surround sound. */
  63 };
  64
  65 enum _ModPlug_ResamplingMode
  66 {
  67         MODPLUG_RESAMPLE_NEAREST = 0,  /* No interpolation (very fast, extremely bad sound quality) */
  68         MODPLUG_RESAMPLE_LINEAR  = 1,  /* Linear interpolation (fast, good quality) */
  69         MODPLUG_RESAMPLE_SPLINE  = 2,  /* Cubic spline interpolation (high quality) */
  70         MODPLUG_RESAMPLE_FIR     = 3   /* 8-tap fir filter (extremely high quality) */
  71 };
  72
  73 typedef struct _ModPlug_Settings
  74 {
  75         int mFlags;  /* One or more of the MODPLUG_ENABLE_* flags above, bitwise-OR'ed */
  76
  77         /* Note that ModPlug always decodes sound at 44100kHz, 32 bit, stereo and then
  78          * down-mixes to the settings you choose. */
  79         int mChannels;       /* Number of channels - 1 for mono or 2 for stereo */
  80         int mBits;           /* Bits per sample - 8, 16, or 32 */
  81         int mFrequency;      /* Sampling rate - 11025, 22050, or 44100 */
  82         int mResamplingMode; /* One of MODPLUG_RESAMPLE_*, above */
  83
  84         int mStereoSeparation; /* Stereo separation, 1 - 256 */
  85         int mMaxMixChannels; /* Maximum number of mixing channels (polyphony), 32 - 256 */
  86
  87         int mReverbDepth;    /* Reverb level 0(quiet)-100(loud)      */
  88         int mReverbDelay;    /* Reverb delay in ms, usually 40-200ms */
  89         int mBassAmount;     /* XBass level 0(quiet)-100(loud)       */
  90         int mBassRange;      /* XBass cutoff in Hz 10-100            */
  91         int mSurroundDepth;  /* Surround level 0(quiet)-100(heavy)   */
  92         int mSurroundDelay;  /* Surround delay in ms, usually 5-40ms */
  93         int mLoopCount;      /* Number of times to loop.  Zero prevents looping.
  94                                 -1 loops forever. */
  95 } ModPlug_Settings;
  96
  97 /* Get and set the mod decoder settings.  All options, except for channels, bits-per-sample,
  98  * sampling rate, and loop count, will take effect immediately.  Those options which don't
  99  * take effect immediately will take effect the next time you load a mod. */
 100 void ModPlug_GetSettings(ModPlug_Settings* settings);
 101 void ModPlug_SetSettings(const ModPlug_Settings* settings);
 102
 103 /* New ModPlug API Functions */
 104 /* NOTE: Master Volume (1-512) */
 105 unsigned int ModPlug_GetMasterVolume(ModPlugFile* file) ;
 106 void ModPlug_SetMasterVolume(ModPlugFile* file,unsigned int cvol) ;
 107
 108 int ModPlug_GetCurrentSpeed(ModPlugFile* file);
 109 int ModPlug_GetCurrentTempo(ModPlugFile* file);
 110 int ModPlug_GetCurrentOrder(ModPlugFile* file);
 111 int ModPlug_GetCurrentPattern(ModPlugFile* file);
 112 int ModPlug_GetCurrentRow(ModPlugFile* file);
 113 int ModPlug_GetPlayingChannels(ModPlugFile* file);
 114
 115 void ModPlug_SeekOrder(ModPlugFile* file,int order);
 116 int ModPlug_GetModuleType(ModPlugFile* file);
 117 char* ModPlug_GetMessage(ModPlugFile* file);
 118
 119
 120 #ifndef MODPLUG_NO_FILESAVE
 121 /*
 122  * EXPERIMENTAL Export Functions
 123  */
 124 /*Export to a Scream Tracker 3 S3M module. EXPERIMENTAL (only works on Little-Endian platforms)*/
 125 char ModPlug_ExportS3M(ModPlugFile* file, const char* filepath);
 126
 127 /*Export to a Extended Module (XM). EXPERIMENTAL (only works on Little-Endian platforms)*/
 128 char ModPlug_ExportXM(ModPlugFile* file, const char* filepath);
 129
 130 /*Export to a Amiga MOD file. EXPERIMENTAL.*/
 131 char ModPlug_ExportMOD(ModPlugFile* file, const char* filepath);
 132
 133 /*Export to a Impulse Tracker IT file. Should work OK in Little-Endian & Big-Endian platforms :-) */
 134 char ModPlug_ExportIT(ModPlugFile* file, const char* filepath);
 135 #endif // MODPLUG_NO_FILESAVE
 136
 137 unsigned int ModPlug_NumInstruments(ModPlugFile* file);
 138 unsigned int ModPlug_NumSamples(ModPlugFile* file);
 139 unsigned int ModPlug_NumPatterns(ModPlugFile* file);
 140 unsigned int ModPlug_NumChannels(ModPlugFile* file);
 141 unsigned int ModPlug_SampleName(ModPlugFile* file, unsigned int qual, char* buff);
 142 unsigned int ModPlug_InstrumentName(ModPlugFile* file, unsigned int qual, char* buff);
 143
 144 /*
 145  * Retrieve pattern note-data
 146  */
 147 ModPlugNote* ModPlug_GetPattern(ModPlugFile* file, int pattern, unsigned int* numrows);
 148
 149 /*
 150  * =================
 151  * Mixer callback
 152  * =================
 153  *
 154  * Use this callback if you want to 'modify' the mixed data of LibModPlug.
 155  *
 156  * void proc(int* buffer,unsigned long channels,unsigned long nsamples) ;
 157  *
 158  * 'buffer': A buffer of mixed samples
 159  * 'channels': N. of channels in the buffer
 160  * 'nsamples': N. of samples in the buffeer (without taking care of n.channels)
 161  *
 162  * (Samples are signed 32-bit integers)
 163  */
 164 void ModPlug_InitMixerCallback(ModPlugFile* file,ModPlugMixerProc proc) ;
 165 void ModPlug_UnloadMixerCallback(ModPlugFile* file) ;
 166
 167 #ifdef __cplusplus
 168 } /* extern "C" */
 169 #endif
 170
 171 #endif