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/***************************************************************************
* S3m/Mod player by Daniel Marks (dmarks@ais.net)
* GUS support by David Jeske (jeske@uiuc.edu)
*
* (C) 1994,1995 By Daniel Marks and David Jeske
*
* While we retain the copyright to this code, this source code is FREE.
* You may use it in any way you wish, in any product you wish. You may
* NOT steal the copyright for this code from us.
*
* We respectfully ask that you email one of us, if possible, if you
* produce something significant with this code, or if you have any bug
* fixes to contribute. We also request that you give credit where
* credit is due if you include part of this code in a program of your own.
*
* Email: s3mod@uiuc.edu
* jeske@uiuc.edu
*
* See the associated README file for Thanks
***************************************************************************
*
* play.c - the player itself
*
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include "main.h"
#include "mod.h"
#include "play.h"
#include "dsp.h"
#ifdef GUS
#include <linux/ultrasound.h>
#include "gus.h"
#endif /* GUS */
union
{
uint8 rot_buf[ROT_BUF_SIZE];
uint16 rot_buf16[ROT_BUF_SIZE];
} buf;
void updatetracks(void)
{
track_info_ptr track;
int16 count;
tempo_wait = tempo;
if (row >= 64)
{
if (order_pos >= mod.song_length_patterns)
{
order_pos = mod.song_repeat_patterns;
if (order_pos >= mod.song_length_patterns)
{
order_pos = 0;
mod_done = 1;
}
}
row = break_row;
break_row = 0;
if (mod.positions[order_pos] == 0xFF)
{
mod_done = 1;
return;
}
if (mod.s3m)
note = mod.patterns[mod.positions[order_pos]];
else
note = mod.patterns[mod.positions[order_pos]] +
(((uint16)row) * sizeof(uint8) * 4 * mod.tracks);
order_pos++;
}
row++;
if (mod.s3m)
get_track_s3m(¬e);
else
{
track = tracks;
for (count=0;count<mod.tracks;count++)
get_track(track++,¬e);
}
track = tracks;
for (count=0;count<mod.tracks;count++)
{
track->playing_period = track->period;
track->playing_volume = track->volume;
track++;
}
#ifdef DEBUG
printf("00-01-02-03-04-05-06-07-pattern %d row %d\n",order_pos,row);
#endif
return;
}
void play_mod(int loud)
{
register uint8 *c;
register uint16 *d;
int16 i;
track_info_ptr track;
int16 count;
startplaying(loud);
mod_done = 0;
while (!mod_done)
{
if (--tempo_wait)
{
track = tracks;
for (count=0;count<mod.tracks;count++)
beattrack(track++);
}
else
updatetracks();
track = tracks;
if (bit16)
{
if (stereo)
for (d=&buf.rot_buf16[bpm_samples << 1];d > buf.rot_buf16;*(--d) = 0x8000);
else
for (d=&buf.rot_buf16[bpm_samples];d > buf.rot_buf16;*(--d) = 0x8000);
} else
{
if (stereo)
for (c=&buf.rot_buf[bpm_samples << 1];c > buf.rot_buf;*(--c) = 0x80);
else
for (c=&buf.rot_buf[bpm_samples];c > buf.rot_buf;*(--c) = 0x80);
}
for (i=0;i<mod.tracks;i++)
{
if (bit16)
{
if (stereo)
mixtrack_16_stereo(track,buf.rot_buf16,bpm_samples,
i & 0x01);
else
mixtrack_16_mono(track,buf.rot_buf16,bpm_samples);
} else
{
if (stereo)
mixtrack_8_stereo(track,buf.rot_buf,bpm_samples,
i & 0x01);
else
mixtrack_8_mono(track,buf.rot_buf,bpm_samples);
}
track++;
}
c = (uint8 *) buf.rot_buf;
if (stereo)
{
if (bit16)
d = (uint16 *) &c[bpm_samples << 2];
else
d = (uint16 *) &c[bpm_samples << 1];
} else
{
if (bit16)
d = (uint16 *) &c[bpm_samples << 1];
else
d = (uint16 *) &c[bpm_samples];
}
while (c < ((uint8 *)d))
{
if (audio_curptr >= audio_end_buffer)
{
write_dsp_device(audio_start_buffer,audio_buffer_size);
audio_curptr = audio_start_buffer;
}
*audio_curptr++ = *c++;
}
}
}
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