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92 lines
3.9 KiB
C
92 lines
3.9 KiB
C
/*
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* This source code is public domain.
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*
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* Authors: Kenton Varda <temporal@gauge3d.org> (C interface wrapper)
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*/
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#ifndef MODPLUG_H__INCLUDED
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#define MODPLUG_H__INCLUDED
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct _ModPlugFile;
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typedef struct _ModPlugFile ModPlugFile;
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/* Load a mod file. [data] should point to a block of memory containing the complete
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* file, and [size] should be the size of that block.
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* Return the loaded mod file on success, or NULL on failure. */
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ModPlugFile* ModPlug_Load(const void* data, int size);
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/* Unload a mod file. */
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void ModPlug_Unload(ModPlugFile* file);
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/* Read sample data into the buffer. Returns the number of bytes read. If the end
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* of the mod has been reached, zero is returned. */
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int ModPlug_Read(ModPlugFile* file, void* buffer, int size);
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/* Get the name of the mod. The returned buffer is stored within the ModPlugFile
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* structure and will remain valid until you unload the file. */
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const char* ModPlug_GetName(ModPlugFile* file);
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/* Get the length of the mod, in milliseconds. Note that this result is not always
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* accurate, especially in the case of mods with loops. */
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int ModPlug_GetLength(ModPlugFile* file);
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/* Seek to a particular position in the song. Note that seeking and MODs don't mix very
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* well. Some mods will be missing instruments for a short time after a seek, as ModPlug
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* does not scan the sequence backwards to find out which instruments were supposed to be
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* playing at that time. (Doing so would be difficult and not very reliable.) Also,
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* note that seeking is not very exact in some mods -- especially those for which
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* ModPlug_GetLength() does not report the full length. */
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void ModPlug_Seek(ModPlugFile* file, int millisecond);
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enum _ModPlug_Flags
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{
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MODPLUG_ENABLE_OVERSAMPLING = 1 << 0, /* Enable oversampling (*highly* recommended) */
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MODPLUG_ENABLE_NOISE_REDUCTION = 1 << 1, /* Enable noise reduction */
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MODPLUG_ENABLE_REVERB = 1 << 2, /* Enable reverb */
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MODPLUG_ENABLE_MEGABASS = 1 << 3, /* Enable megabass */
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MODPLUG_ENABLE_SURROUND = 1 << 4 /* Enable surround sound. */
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};
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enum _ModPlug_ResamplingMode
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{
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MODPLUG_RESAMPLE_NEAREST = 0, /* No interpolation (very fast, extremely bad sound quality) */
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MODPLUG_RESAMPLE_LINEAR = 1, /* Linear interpolation (fast, good quality) */
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MODPLUG_RESAMPLE_SPLINE = 2, /* Cubic spline interpolation (high quality) */
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MODPLUG_RESAMPLE_FIR = 3 /* 8-tap fir filter (extremely high quality) */
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};
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typedef struct _ModPlug_Settings
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{
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int mFlags; /* One or more of the MODPLUG_ENABLE_* flags above, bitwise-OR'ed */
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/* Note that ModPlug always decodes sound at 44100kHz, 32 bit, stereo and then
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* down-mixes to the settings you choose. */
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int mChannels; /* Number of channels - 1 for mono or 2 for stereo */
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int mBits; /* Bits per sample - 8, 16, or 32 */
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int mFrequency; /* Sampling rate - 11025, 22050, or 44100 */
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int mResamplingMode; /* One of MODPLUG_RESAMPLE_*, above */
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int mReverbDepth; /* Reverb level 0(quiet)-100(loud) */
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int mReverbDelay; /* Reverb delay in ms, usually 40-200ms */
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int mBassAmount; /* XBass level 0(quiet)-100(loud) */
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int mBassRange; /* XBass cutoff in Hz 10-100 */
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int mSurroundDepth; /* Surround level 0(quiet)-100(heavy) */
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int mSurroundDelay; /* Surround delay in ms, usually 5-40ms */
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int mLoopCount; /* Number of times to loop. Zero prevents looping.
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-1 loops forever. */
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} ModPlug_Settings;
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/* Get and set the mod decoder settings. All options, except for channels, bits-per-sample,
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* sampling rate, and loop count, will take effect immediately. Those options which don't
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* take effect immediately will take effect the next time you load a mod. */
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void ModPlug_GetSettings(ModPlug_Settings* settings);
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void ModPlug_SetSettings(const ModPlug_Settings* settings);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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