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/* Freebirth
* Copyright (C) 1999 topher lafata <topher@topher.com>,
* Jake Donham <jake@bitmechanic.com>
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <glib.h>
#ifndef __SAMPLE_PRODUCER_H
#include "sample_producer.h"
#endif
#ifndef __SEQ_H
#include "sequencer.h"
#endif
extern seq *sequencer;
void topo_sort(sample_producer *node, GList **order) {
if (g_list_find(*order, (gpointer)node))
return;
else {
sample_producer **children;
for (children = node->get_children(node);
*children;
children++) {
topo_sort(*children, order);
}
*order = g_list_append(*order, (gpointer)node);
}
}
void expand_seq(char **tmpl, char *prefix, FILE *file) {
for (; *tmpl; tmpl++)
fprintf(file, "%s%s\n", prefix, *tmpl);
}
void break_func(void) { }
void expand(sample_producer *node, char **tmpl, GList *order,
char *prefix, FILE *file) {
sample_producer **children = node->get_children(node);
int node_i = g_list_index(order, (gpointer)node);
for (; *tmpl; tmpl++) {
char buf[1024];
char *sp = *tmpl, *dp = buf;
dp += sprintf(dp, prefix);
while (*sp) {
if (*sp == '$') {
switch (*++sp) {
char nbuf[8], *np;
/*
case '^':
break_func();
sp++;
break;
*/
case 'i':
np = nbuf;
while (isdigit(*++sp))
*np++ = *sp;
*np = '\0';
dp += sprintf(dp, "samp%d",
g_list_index(order, (gpointer)children[atoi(nbuf)]));
break;
case 'n':
dp += sprintf(dp, "n%d", node_i);
sp++;
break;
case 'o':
dp += sprintf(dp, "samp%d", node_i);
sp++;
break;
case 't':
dp += sprintf(dp, "sp[%d]", node_i);
sp++;
break;
}
}
else
*dp++ = *sp++;
}
*dp++ = '\n';
*dp = '\0';
fprintf(file, buf);
}
}
void fuse_loops(sample_producer *left, sample_producer *right, FILE *file) {
GList *order = NULL;
GList *gl;
int i, sampL, sampR;
topo_sort(left, &order);
topo_sort(right, &order);
fprintf(file, "/* generated file -- don't edit */\n");
fprintf(file, "#include <unistd.h>\n");
fprintf(file, "#include <math.h>\n");
fprintf(file, "#include <endian.h>\n");
fprintf(file, "#include \"freebirth.h\"\n");
fprintf(file, "/* borrowed from glib2 */\n");
fprintf(file, "#define SHORT_SWAP_LE_BE(val) ((short) ( \\\n");
fprintf(file, " (short) ((short) (val) >> 8) | \\\n");
fprintf(file, " (short) ((short) (val) << 8)))\n");
fprintf(file, "static void swap_endian(short *data, int length)\n");
fprintf(file, "{\n");
fprintf(file, " int i;\n");
fprintf(file, " for (i = 0; i < length; i += 1, data++)\n");
fprintf(file, " *data = SHORT_SWAP_LE_BE(*data);\n");
fprintf(file, "}\n");
fprintf(file, "\n");
fprintf(file, "sample_producer *sp[%d];\n", g_list_length(order));
fprintf(file, "\n");
fprintf(file, "int play_buffer(gpointer data, gint source, GdkInputCondition condition)\n");
fprintf(file, "{\n");
fprintf(file, " int i;\n");
fprintf(file, " short buffer[TBASS_BUFF_SIZE * 2];\n");
fprintf(file, " \n");
for (gl = order, i=0; gl; gl = g_list_next(gl), i++)
fprintf(file, " sample samp%d;\n", i);
fprintf(file, "\n");
expand_seq(seq_get_header(sequencer), " ", file);
fprintf(file, "\n");
for (gl = order; gl; gl = g_list_next(gl)) {
sample_producer *node = (sample_producer *)gl->data;
expand(node, node->get_header(node), order, " ", file);
fprintf(file, "\n");
}
fprintf(file, " for (i = 0; i < TBASS_BUFF_SIZE; i++) {\n");
expand_seq(seq_get_code(sequencer), " ", file);
fprintf(file, "\n");
for (gl = order; gl; gl = g_list_next(gl)) {
sample_producer *node = (sample_producer *)gl->data;
expand(node, node->get_code(node), order, " ", file);
if (g_list_next(gl)) fprintf(file, "\n");
}
sampL = g_list_index(order, (gpointer)left);
sampR = g_list_index(order, (gpointer)right);
fprintf(file, " if ((samp%d < CLIP) && (samp%d >-CLIP))\n", sampL, sampL);
fprintf(file, " buffer[2 * i] = (short)samp%d;\n", sampL);
fprintf(file, " else if (samp%d > 0)\n", sampL);
fprintf(file, " buffer[2 * i] = (short)MIX_MAX_AMP-(CLIP_A/(CLIP_B+samp%d));\n", sampL);
fprintf(file, " else\n");
fprintf(file, " buffer[2 * i] = (short)-(MIX_MAX_AMP-(CLIP_A/(CLIP_B-samp%d)));\n", sampL);
fprintf(file, " if ((samp%d < CLIP) && (samp%d >-CLIP))\n", sampR, sampR);
fprintf(file, " buffer[2 * i + 1] = (short)samp%d;\n", sampR);
fprintf(file, " else if (samp%d > 0)\n", sampR);
fprintf(file, " buffer[2 * i + 1] = (short)MIX_MAX_AMP-(CLIP_A/(CLIP_B+samp%d));\n", sampR);
fprintf(file, " else\n");
fprintf(file, " buffer[2 * i + 1] = (short)-(MIX_MAX_AMP-(CLIP_A/(CLIP_B-samp%d)));\n", sampR);
fprintf(file, " }\n");
fprintf(file, "\n");
fprintf(file, "#if __BYTE_ORDER == __BIG_ENDIAN\n");
fprintf(file, " swap_endian(buffer, 2 * TBASS_BUFF_SIZE);\n");
fprintf(file, "#endif\n");
fprintf(file, " write(fd, buffer, 2 * TBASS_BUFF_SIZE * sizeof(short));\n");
fprintf(file, "\n");
expand_seq(seq_get_footer(sequencer), " ", file);
fprintf(file, "\n");
for (gl = order; gl; gl = g_list_next(gl)) {
sample_producer *node = (sample_producer *)gl->data;
expand(node, node->get_footer(node), order, " ", file);
fprintf(file, "\n");
}
fprintf(file, " return 1;\n");
fprintf(file, "}\n");
}
/* dummy so fusebirth links */
int play_buffer()
{
return 0;
}
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