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Aminet 8
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Aminet 8 (1995)(GTI - Schatztruhe)[!][Oct 1995].iso
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tracker_4_31.lzh
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st_play.c
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C/C++ Source or Header
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1995-05-15
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12KB
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489 lines
/* st_play.c
vi:ts=3 sw=3:
*/
/* $Id: st_play.c,v 4.21 1995/05/15 12:20:09 espie Exp espie $
* $Log: st_play.c,v $
* Revision 4.21 1995/05/15 12:20:09 espie
* *** empty log message ***
*
* Revision 4.20 1995/05/11 12:30:46 espie
* DELAY PATTERN correction.
*
* Revision 4.19 1995/03/11 21:41:01 espie
* Added invert_loop.
*
* Revision 4.18 1995/03/04 00:16:21 espie
* implemented vibrato wave.
*
* Revision 4.17 1995/03/03 14:24:21 espie
* *** empty log message ***
*
* Revision 4.16 1995/03/01 15:24:51 espie
* data width.
*
* Revision 4.15 1995/02/21 21:13:16 espie
* Cleaned up source. Moved minor pieces of code around.
*
* Revision 4.14 1995/02/21 17:54:32 espie
* Internal problem: buggy RCS. Fixed logs.
*
* Revision 4.12 1995/02/20 22:53:31 espie
* Some display updated.
*
* Revision 4.11 1995/02/20 22:28:50 espie
* 8 channels.
*
* Revision 4.10 1995/02/20 16:49:58 espie
* Added funk_glissando
*
* Revision 4.9 1995/02/14 04:02:28 espie
* Suppressed comment.
*
* Revision 4.8 1995/02/06 14:50:47 espie
* Changed sample_info.
*
* Revision 4.7 1995/02/01 20:41:45 espie
* Added color.
*
* Revision 4.6 1995/02/01 16:39:04 espie
* Left/Right channels.
*
* Revision 4.0 1994/01/11 17:51:40 espie
* Use the new UI calls.
* Use the new pref settings.
*
* Revision 1.14 1994/01/09 23:24:37 Espie
* Last bug fix.
* Suppressed really outdated code.
* New names: new_channel_tag_list, release_audio_channel.
* Some notice to status.
* Use new pref scheme.
* Use get_ui
* Use autoinit feature of display.c
* discard_buffer forgotten...
* Handle errors better.
*
* Revision 3.18 1993/12/04 16:12:50 espie
* Lots of changes.
* New high-level functions.
* Amiga support.
* Bug with delay_pattern: can't factorize the check for effect thingy.
* Reniced verbose output display.
* Bug fix: now use correct finetune when loading samples/starting notes.
* Added bg/fg test.
* General cleanup
* Added <> operators.
* Added update frequency on the fly.
* Added finetune.
* Protracker commands.
*
* Revision 2.19 1992/11/17 17:15:37 espie
* Added interface using may_getchar(). Still primitive, though.
* imask, start.
* Added transpose feature.
* Added possibility to get back to MONO for the sgi.
* Added stereo capabilities to the indigo version.
* Added two level of fault tolerancy.
* Added some control on the number of replays,
* and better error recovery.
*/
#include "defs.h"
#include "song.h"
#include "channel.h"
#include "extern.h"
#include "tags.h"
#include "prefs.h"
extern int vibrato_table[3][64];
ID("$Id: st_play.c,v 4.21 1995/05/15 12:20:09 espie Exp espie $")
/* setting up a given note */
void reset_note(ch, note, pitch)
struct channel *ch;
int note;
int pitch;
{
ch->pitch = pitch;
ch->note = note;
ch->viboffset = 0;
ch->tremoffset = 0;
play_note(ch->audio, ch->samp, pitch);
}
/* changing the current pitch (value may be temporary, and so is not stored
* in channel pitch, for instance vibratos)
*/
void set_current_pitch(ch, pitch)
struct channel *ch;
int pitch;
{
set_play_pitch(ch->audio, pitch);
}
/* changing the current volume, storing it in ch->volume
*/
void set_current_volume(ch, volume)
struct channel *ch;
int volume;
{
ch->volume = MAX(MIN(volume, MAX_VOLUME), MIN_VOLUME);
set_play_volume(ch->audio, ch->volume);
}
/* changing the current volume WITHOUT storing it
*/
void set_temp_volume(ch, volume)
struct channel *ch;
int volume;
{
volume = MAX(MIN(volume, MAX_VOLUME), MIN_VOLUME);
set_play_volume(ch->audio, volume);
}
void set_position(ch, pos)
struct channel *ch;
int pos;
{
set_play_position(ch->audio, pos);
}
/* init_channel(ch, dummy):
* setup channel, with initially a dummy sample ready to play, and no note.
*/
LOCAL void init_channel(ch, side)
struct channel *ch;
int side;
{
struct tag tags[2];
tags[0].type = AUDIO_SIDE;
tags[0].data.scalar = side;
tags[1].type = TAG_END;
ch->samp = empty_sample();
ch->finetune = 0;
ch->audio = new_channel_tag_list(tags);
ch->volume = 0;
ch->pitch = 0;
ch->note = NO_NOTE;
/* we don't setup arpeggio values. */
ch->viboffset = 0;
ch->vibdepth = 0;
ch->vibrate = 0;
ch->vibtable = vibrato_table[0];
ch->resetvib = FALSE;
ch->tremoffset = 0;
ch->tremdepth = 0;
ch->tremrate = 0;
ch->tremtable = vibrato_table[0];
ch->resettrem = FALSE;
ch->slide = 0;
ch->pitchgoal = 0;
ch->pitchrate = 0;
ch->volumerate = 0;
ch->funk_glissando = FALSE;
ch->start_offset = 0;
ch->adjust = do_nothing;
/* initialize loop to no loop, loop start at 0
* (needed for don't you want me, for instance) */
ch->loop_counter = -1;
ch->loop_note_num = 0;
ch->special = do_nothing;
ch->invert_speed = 0;
ch->invert_offset = 0;
ch->invert_position = 0;
}
LOCAL int VSYNC; /* base number of sample to output */
LOCAL void (*eval[NUMBER_EFFECTS]) P((struct automaton *a, struct channel *ch));
/* the effect table */
LOCAL int oversample; /* oversample value */
LOCAL int frequency; /* output frequency */
LOCAL struct channel chan[MAX_TRACKS];
/* every channel */
LOCAL int ntracks; /* number of tracks of the current song */
LOCAL struct sample_info **voices;
LOCAL struct automaton a;
void init_player(o, f)
int o, f;
{
oversample = o;
frequency = f;
init_tables(o, f);
init_effects(eval);
}
LOCAL void setup_effect(ch, a, e)
struct channel *ch;
struct automaton *a;
struct event *e;
{
int samp, cmd;
/* retrieves all the parameters */
samp = e->sample_number;
/* load new instrument */
if (samp)
{ /* note that we can change sample in the middle of a note. This
* is a *feature*, not a bug (see made). Precisely: the sample
* change will be taken into account for the next note, BUT the
* volume change takes effect immediately.
*/
ch->samp = voices[samp];
ch->finetune = voices[samp]->finetune;
if ((1L<<samp) & get_pref_scalar(PREF_IMASK))
ch->samp = empty_sample();
set_current_volume(ch, voices[samp]->volume);
}
a->note = e->note;
if (a->note != NO_NOTE)
a->pitch = pitch_table[a->note][ch->finetune];
else
a->pitch = e->pitch;
cmd = e->effect;
a->para = e->parameters;
if (a->pitch >= REAL_MAX_PITCH)
{
char buffer[60];
sprintf(buffer,"Pitch out of bounds %d", a->pitch);
status(buffer);
a->pitch = 0;
error = FAULT;
}
/* check for a new note: portamento
* is the special case where we do not restart
* the note.
*/
if (a->pitch && cmd != EFF_PORTA && cmd != EFF_PORTASLIDE)
reset_note(ch, a->note, a->pitch);
ch->adjust = do_nothing;
/* do effects */
(eval[cmd])(a, ch);
}
LOCAL void adjust_sync(ofreq, tempo)
int ofreq, tempo;
{
VSYNC = ofreq * NORMAL_FINESPEED / tempo;
}
LOCAL void dump_events(a)
struct automaton *a;
{
/* display the output in a reasonable order:
* LEFT1 LEFT2 || RIGHT1 RIGHT 2
*/
dump_event(chan, &(a->pattern->e[0][a->note_num]));
dump_event(chan+3, &(a->pattern->e[3][a->note_num]));
if (ntracks > 4)
dump_event(chan+4, &(a->pattern->e[4][a->note_num]));
if (ntracks > 7)
dump_event(chan+7, &(a->pattern->e[7][a->note_num]));
dump_delimiter();
dump_event(chan+1, &(a->pattern->e[1][a->note_num]));
dump_event(chan+2, &(a->pattern->e[2][a->note_num]));
if (ntracks > 5)
dump_event(chan+5, &(a->pattern->e[5][a->note_num]));
if (ntracks > 6)
dump_event(chan+6, &(a->pattern->e[6][a->note_num]));
dump_event(0, 0);
}
LOCAL void play_once(a)
struct automaton *a;
{
int channel;
if (a->counter == 0)
{ /* do new effects only if not in delay mode */
if (a->delay_counter == 0)
{
for (channel = 0; channel < ntracks; channel++)
/* setup effects */
setup_effect(chan + channel, a,
&(a->pattern->e[channel][a->note_num]));
if (get_pref_scalar(PREF_SHOW))
dump_events(a);
}
}
else
for (channel = 0; channel < ntracks; channel++)
{
/* do the effects */
(chan[channel].special)(chan + channel);
(chan[channel].adjust)(chan + channel);
}
/* advance player for the next tick */
next_tick(a);
/* actually output samples */
resample(oversample, VSYNC / a->finespeed);
}
LOCAL struct tag pres[2];
LOCAL void init_channels()
{
release_audio_channels();
init_channel(chan, LEFT_SIDE);
init_channel(chan + 1, RIGHT_SIDE);
init_channel(chan + 2, RIGHT_SIDE);
init_channel(chan + 3, LEFT_SIDE);
if (ntracks > 4)
{
init_channel(chan + 4, LEFT_SIDE);
init_channel(chan + 5, RIGHT_SIDE);
}
if (ntracks > 6)
{
init_channel(chan + 6, RIGHT_SIDE);
init_channel(chan + 7, LEFT_SIDE);
}
}
struct tag *play_song(song, start)
struct song *song;
int start;
{
int tempo;
int countdown; /* keep playing the tune or not */
song_title(song->title);
pres[1].type = TAG_END;
ntracks = song->ntracks;
set_number_tracks(ntracks);
tempo = get_pref_scalar(PREF_SPEED);
adjust_sync(frequency, tempo);
/* a repeats of 0 is infinite replays */
countdown = get_pref_scalar(PREF_REPEATS);
if (countdown == 0)
countdown = 50000; /* ridiculously huge number */
voices = song->samples;
init_automaton(&a, song, start);
init_channels();
set_data_width(song->side_width, song->max_sample_width);
while(countdown)
{
struct tag *result;
play_once(&a);
result = get_ui();
while(result = get_tag(result))
{
switch(result->type)
{
case UI_LOAD_SONG:
if (!result->data.pointer)
break;
case UI_NEXT_SONG:
case UI_PREVIOUS_SONG:
discard_buffer();
pres[0].type = result->type;
pres[0].data = result->data;
return pres;
case UI_QUIT:
discard_buffer();
end_all(0);
/* NOTREACHED */
case UI_SET_BPM:
tempo = result->data.scalar;
adjust_sync(frequency, tempo);
break;
case UI_RESTART:
discard_buffer();
init_automaton(&a, song, start);
init_channels();
break;
case UI_JUMP_TO_PATTERN:
if (result->data.scalar >= 0 &&
result->data.scalar < a.info->length)
{
discard_buffer();
init_automaton(&a, song, result->data.scalar);
}
break;
/*
case ' ':
while (may_getchar() == EOF)
;
break;
*/
default:
break;
}
result++;
}
{
int new_freq;
if (new_freq = update_frequency())
{
frequency = new_freq;
adjust_sync(frequency, tempo);
init_tables(oversample, frequency);
}
}
switch(error)
{
case NONE:
break;
case ENDED:
countdown--;
break;
case SAMPLE_FAULT:
case FAULT:
case PREVIOUS_SONG:
case NEXT_SONG:
case UNRECOVERABLE:
if ( (error == SAMPLE_FAULT && get_pref_scalar(PREF_TOLERATE))
||(error == FAULT && get_pref_scalar(PREF_TOLERATE) > 1) )
break;
pres[0].type = PLAY_ERROR;
pres[0].data.scalar = error;
return pres;
default:
break;
}
error = NONE;
}
pres[0].type = PLAY_ENDED;
return pres;
}