--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/decoders/timidity/timidity.h	Fri Jan 04 06:49:49 2002 +0000
@@ -0,0 +1,156 @@
+/*
+
+    TiMidity -- Experimental MIDI to WAVE converter
+    Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
+
+	 This program is free software; you can redistribute it and/or modify
+	 it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+	 (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	 GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+typedef Sint16 sample_t;
+typedef Sint32 final_volume_t;
+
+#define VIBRATO_SAMPLE_INCREMENTS 32
+
+/* Maximum polyphony. */
+#define MAX_VOICES	48
+
+typedef struct {
+  Sint32
+    loop_start, loop_end, data_length,
+    sample_rate, low_freq, high_freq, root_freq;
+  Sint32
+    envelope_rate[6], envelope_offset[6];
+  float
+    volume;
+  sample_t *data;
+  Sint32 
+    tremolo_sweep_increment, tremolo_phase_increment, 
+    vibrato_sweep_increment, vibrato_control_ratio;
+  Uint8
+    tremolo_depth, vibrato_depth,
+    modes;
+  Sint8
+    panning, note_to_use;
+} Sample;
+
+typedef struct {
+  int
+    bank, program, volume, sustain, panning, pitchbend, expression, 
+    mono, /* one note only on this channel -- not implemented yet */
+    pitchsens;
+  /* chorus, reverb... Coming soon to a 300-MHz, eight-way superscalar
+     processor near you */
+  float
+    pitchfactor; /* precomputed pitch bend factor to save some fdiv's */
+} Channel;
+
+typedef struct {
+  Uint8
+    status, channel, note, velocity;
+  Sample *sample;
+  Sint32
+    orig_frequency, frequency,
+    sample_offset, sample_increment,
+    envelope_volume, envelope_target, envelope_increment,
+    tremolo_sweep, tremolo_sweep_position,
+    tremolo_phase, tremolo_phase_increment,
+    vibrato_sweep, vibrato_sweep_position;
+  
+  final_volume_t left_mix, right_mix;
+
+  float
+    left_amp, right_amp, tremolo_volume;
+  Sint32
+    vibrato_sample_increment[VIBRATO_SAMPLE_INCREMENTS];
+  int
+    vibrato_phase, vibrato_control_ratio, vibrato_control_counter,
+    envelope_stage, control_counter, panning, panned;
+
+} Voice;
+
+typedef struct {
+  int samples;
+  Sample *sample;
+} Instrument;
+
+/* Shared data */
+typedef struct {
+  char *name;
+  int note, amp, pan, strip_loop, strip_envelope, strip_tail;
+} ToneBankElement;
+
+typedef struct {
+  ToneBankElement *tone;
+  Instrument *instrument[128];
+} ToneBank;
+
+typedef struct {
+    Sint32 time;
+    Uint8 channel, type, a, b;
+} MidiEvent;
+
+typedef struct {
+    MidiEvent event;
+    void *next;
+} MidiEventList;
+
+typedef struct {
+    int playing;
+    SDL_RWops *rw;
+    Sint32 rate;
+    Sint32 encoding;
+    float master_volume;
+    Sint32 amplification;
+    ToneBank *tonebank[128];
+    ToneBank *drumset[128];
+    Instrument *default_instrument;
+    int default_program;
+    void (*write)(void *dp, Sint32 *lp, Sint32 c);
+    int buffer_size;
+    sample_t *resample_buffer;
+    Sint32 *common_buffer;
+    Sint32 *buffer_pointer;
+    /* These would both fit into 32 bits, but they are often added in
+       large multiples, so it's simpler to have two roomy ints */
+    /* samples per MIDI delta-t */
+    Sint32 sample_increment;
+    Sint32 sample_correction;
+    Channel channel[16];
+    Voice voice[MAX_VOICES];
+    int voices;
+    Sint32 drumchannels;
+    Sint32 buffered_count;
+    Sint32 control_ratio;
+    Sint32 lost_notes;
+    Sint32 cut_notes;
+    Sint32 samples;
+    MidiEvent *events;
+    MidiEvent *current_event;
+    MidiEventList *evlist;
+    Sint32 current_sample;
+    Sint32 event_count;
+    Sint32 at;
+} MidiSong;
+
+/* Some of these are not defined in timidity.c but are here for convenience */
+
+extern int Timidity_Init(void);
+extern void Timidity_SetVolume(MidiSong *song, int volume);
+extern int Timidity_PlaySome(MidiSong *song, void *stream, Sint32 len);
+extern MidiSong *Timidity_LoadSong(SDL_RWops *rw, SDL_AudioSpec *audio);
+extern void Timidity_Start(MidiSong *song);
+extern void Timidity_FreeSong(MidiSong *song);
+extern void Timidity_Exit(void);