310 lines
7.2 KiB
C
310 lines
7.2 KiB
C
///////////////////////////////////////////////////////////////////////////////////
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//-------------------------------------------------------------------------------//
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//-------------------------------------------------------------------------------//
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//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
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//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
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//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
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//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
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//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
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//-------------------------------------------------------------------------------//
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//----------------------------------------------------- http://hxc2001.free.fr --//
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///////////////////////////////////////////////////////////////////////////////////
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// File : hxcmod.h
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// Contains: a tiny mod player
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//
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// Written by: Jean François DEL NERO
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//
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// Change History (most recent first):
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef MODPLAY_DEF
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#define MODPLAY_DEF
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef HXCMOD_SLOW_TARGET
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#define HXCMOD_STATE_REPORT_SUPPORT 1
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#define HXCMOD_OUTPUT_FILTER 1
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#define HXCMOD_OUTPUT_STEREO_MIX 1
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#define HXCMOD_CLIPPING_CHECK 1
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#endif
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// Warning : The following option
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// required 32KB of additional RAM :
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// #define HXCMOD_USE_PRECALC_VOLUME_TABLE 1
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// Basic type
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typedef unsigned char muchar;
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typedef signed char mchar;
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typedef unsigned short muint;
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typedef short mint;
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typedef unsigned long mulong;
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#ifdef HXCMOD_16BITS_TARGET
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typedef unsigned short mssize;
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#else
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typedef unsigned long mssize;
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#endif
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#ifdef HXCMOD_8BITS_OUTPUT
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#ifdef HXCMOD_UNSIGNED_OUTPUT
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typedef unsigned char msample;
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#else
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typedef signed char msample;
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#endif
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#else
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#ifdef HXCMOD_UNSIGNED_OUTPUT
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typedef unsigned short msample;
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#else
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typedef signed short msample;
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#endif
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#endif
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#ifdef HXCMOD_MAXCHANNELS
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#define NUMMAXCHANNELS HXCMOD_MAXCHANNELS
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#else
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#define NUMMAXCHANNELS 32
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#endif
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#define MAXNOTES 12*12
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//
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// MOD file structures
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//
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#pragma pack(1)
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typedef struct {
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muchar name[22];
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muint length;
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muchar finetune;
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muchar volume;
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muint reppnt;
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muint replen;
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} sample;
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typedef struct {
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muchar sampperiod;
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muchar period;
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muchar sampeffect;
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muchar effect;
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} note;
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typedef struct {
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muchar title[20];
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sample samples[31];
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muchar length;
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muchar protracker;
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muchar patterntable[128];
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muchar signature[4];
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muchar speed;
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} module;
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#pragma pack()
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//
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// HxCMod Internal structures
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//
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typedef struct {
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mchar * sampdata;
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muint length;
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muint reppnt;
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muint replen;
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muchar sampnum;
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mchar * nxt_sampdata;
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muint nxt_length;
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muint nxt_reppnt;
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muint nxt_replen;
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muchar update_nxt_repeat;
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mchar * dly_sampdata;
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muint dly_length;
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muint dly_reppnt;
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muint dly_replen;
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muchar note_delay;
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mchar * lst_sampdata;
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muint lst_length;
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muint lst_reppnt;
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muint lst_replen;
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muchar retrig_cnt;
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muchar retrig_param;
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muint funkoffset;
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mint funkspeed;
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mint glissando;
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mulong samppos;
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mulong sampinc;
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muint period;
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muchar volume;
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#ifdef HXCMOD_USE_PRECALC_VOLUME_TABLE
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mint * volume_table;
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#endif
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muchar effect;
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muchar parameffect;
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muint effect_code;
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mulong last_set_offset;
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mint decalperiod;
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mint portaspeed;
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mint portaperiod;
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mint vibraperiod;
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mint Arpperiods[3];
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muchar ArpIndex;
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muchar volumeslide;
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muchar vibraparam;
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muchar vibrapointeur;
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muchar finetune;
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muchar cut_param;
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muint patternloopcnt;
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muint patternloopstartpoint;
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} channel;
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typedef struct {
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module song;
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mchar * sampledata[31];
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note * patterndata[128];
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#ifdef HXCMOD_16BITS_TARGET
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muint playrate;
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#else
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mulong playrate;
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#endif
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muint tablepos;
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muint patternpos;
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muint patterndelay;
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muchar jump_loop_effect;
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muchar bpm;
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#ifdef HXCMOD_16BITS_TARGET
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muint patternticks;
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muint patterntickse;
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muint patternticksaim;
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muint patternticksem;
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muint tick_cnt;
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#else
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mulong patternticks;
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mulong patterntickse;
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mulong patternticksaim;
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mulong patternticksem;
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mulong tick_cnt;
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#endif
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mulong sampleticksconst;
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channel channels[NUMMAXCHANNELS];
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muint number_of_channels;
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muint mod_loaded;
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mint last_r_sample;
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mint last_l_sample;
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mint stereo;
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mint stereo_separation;
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mint bits;
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mint filter;
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#ifdef EFFECTS_USAGE_STATE
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int effects_event_counts[32];
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#endif
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#ifdef HXCMOD_USE_PRECALC_VOLUME_TABLE
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mint precalc_volume_array[65*256];
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mint * volume_selection_table[65];
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#endif
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} modcontext;
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//
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// Player states structures
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//
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typedef struct track_state_
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{
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unsigned char instrument_number;
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unsigned short cur_period;
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unsigned char cur_volume;
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unsigned short cur_effect;
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unsigned short cur_parameffect;
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}track_state;
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typedef struct tracker_state_
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{
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int number_of_tracks;
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int bpm;
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int speed;
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int cur_pattern;
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int cur_pattern_pos;
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int cur_pattern_table_pos;
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unsigned int buf_index;
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track_state tracks[NUMMAXCHANNELS];
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}tracker_state;
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typedef struct tracker_state_instrument_
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{
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char name[22];
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int active;
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}tracker_state_instrument;
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typedef struct tracker_buffer_state_
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{
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int nb_max_of_state;
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int nb_of_state;
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int cur_rd_index;
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int sample_step;
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char name[64];
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tracker_state_instrument instruments[31];
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tracker_state * track_state_buf;
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}tracker_buffer_state;
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///////////////////////////////////////////////////////////////////////////////////
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// HxCMOD Core API:
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// -------------------------------------------
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// int hxcmod_init(modcontext * modctx)
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//
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// - Initialize the modcontext buffer. Must be called before doing anything else.
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// Return 1 if success. 0 in case of error.
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// -------------------------------------------
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// int hxcmod_load( modcontext * modctx, void * mod_data, int mod_data_size )
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//
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// - "Load" a MOD from memory (from "mod_data" with size "mod_data_size").
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// Return 1 if success. 0 in case of error.
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// -------------------------------------------
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// void hxcmod_fillbuffer( modcontext * modctx, unsigned short * outbuffer, mssize nbsample, tracker_buffer_state * trkbuf )
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//
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// - Generate and return the next samples chunk to outbuffer.
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// nbsample specify the number of stereo 16bits samples you want.
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// The output format is signed 44100Hz 16-bit Stereo PCM samples.
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// The output buffer size in byte must be equal to ( nbsample * 2 * 2 ).
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// The optional trkbuf parameter can be used to get detailed status of the player. Put NULL/0 is unused.
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// -------------------------------------------
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// void hxcmod_unload( modcontext * modctx )
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//
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// - "Unload" / clear the player status.
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// -------------------------------------------
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///////////////////////////////////////////////////////////////////////////////////
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int hxcmod_init( modcontext * modctx );
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int hxcmod_setcfg( modcontext * modctx, int samplerate, int stereo_separation, int filter );
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int hxcmod_load( modcontext * modctx, void * mod_data, int mod_data_size );
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void hxcmod_fillbuffer( modcontext * modctx, msample * outbuffer, mssize nbsample, tracker_buffer_state * trkbuf );
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void hxcmod_unload( modcontext * modctx );
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#ifdef __cplusplus
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}
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#endif
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#endif /* MODPLAY_DEF */
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