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rockbox/apps/plugins/pdbox/PDa/intern/sfread~.c
Wincent Balin 66cc643402 pdbox: Corrected inclusion of m_fixed.h . 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26551 a1c6a512-1295-4272-9138-f99709370657
2010-06-04 18:37:55 +00:00

320 lines
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#ifdef ROCKBOX
#include "plugin.h"
#include "../../pdbox.h"
#else /* ROCKBOX */
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#endif /* ROCKBOX */
#include "../src/m_pd.h"
#include "../src/m_fixed.h"
#include "../src/g_canvas.h"
/* ------------------------ sfread~ ----------------------------- */
#include "sformat.h"
static t_class *sfread_class;
typedef struct _sfread
{
t_object x_obj;
void* x_mapaddr;
int x_fd;
int x_play;
int x_channels;
long long x_size;
int x_loop;
t_time x_pos;
t_sample x_skip;
t_sample x_speed;
t_glist * x_glist;
t_outlet *x_bangout;
} t_sfread;
void sfread_open(t_sfread *x,t_symbol *filename)
{
#ifndef ROCKBOX
struct stat fstate;
#endif
char fname[MAXPDSTRING];
if (filename == &s_) {
post("sfread: open without filename");
return;
}
canvas_makefilename(glist_getcanvas(x->x_glist), filename->s_name,
fname, MAXPDSTRING);
/* close the old file */
#ifdef ROCKBOX
if (x->x_mapaddr) freebytes(x->x_mapaddr, x->x_size);
#else
if (x->x_mapaddr) munmap(x->x_mapaddr,x->x_size);
#endif
if (x->x_fd >= 0) close(x->x_fd);
if ((x->x_fd = open(fname,O_RDONLY)) < 0)
{
error("can't open %s",fname);
x->x_play = 0;
x->x_mapaddr = NULL;
return;
}
/* get the size */
#ifdef ROCKBOX
x->x_size = rb->filesize(x->x_fd);
#else
fstat(x->x_fd,&fstate);
x->x_size = fstate.st_size;
#endif
/* map the file into memory */
#ifdef ROCKBOX
x->x_mapaddr = getbytes(x->x_size);
if (!x->x_mapaddr)
{
error("can't mmap %s",fname);
return;
}
int r = read(x->x_fd, x->x_mapaddr, x->x_size);
if (r != x->x_size)
{
error("can't mmap %s",fname);
return;
}
#else
if (!(x->x_mapaddr = mmap(NULL,x->x_size,PROT_READ,MAP_PRIVATE,x->x_fd,0)))
{
error("can't mmap %s",fname);
return;
}
#endif
}
#define MAX_CHANS 4
static t_int *sfread_perform(t_int *w)
{
t_sfread* x = (t_sfread*)(w[1]);
short* buf = x->x_mapaddr;
t_time tmp;
int c = x->x_channels;
t_time pos = x->x_pos;
t_sample speed = x->x_speed;
t_time end = itofix(x->x_size/sizeof(short)/c);
int i,n;
t_sample* out[MAX_CHANS];
for (i=0;i<c;i++)
out[i] = (t_sample *)(w[3+i]);
n = (int)(w[3+c]);
/* loop */
if (pos > end)
pos = end;
if (pos + n*speed >= end) { // playing forward end
if (!x->x_loop) {
x->x_play=0;
}
pos = x->x_skip;
}
tmp = n*speed;
if (pos + n*speed <= 0) { // playing backwards end
if (!x->x_loop) {
x->x_play=0;
}
pos = end;
}
if (x->x_play && x->x_mapaddr) {
t_time aoff = fixtoi(pos)*c;
while (n--) {
long frac = (long long)((1<<fix1)-1)&pos;
for (i=0;i<c;i++) {
t_sample bs = *(buf+aoff+i)<<(fix1-16);
t_sample cs = *(buf+aoff+i+1)<<(fix1-16);
*out[i]++ = bs + mult((cs - bs),frac);
}
pos += speed;
aoff = fixtoi(pos)*c;
if (aoff > end) {
if (x->x_loop) pos = x->x_skip;
else break;
}
if (aoff < x->x_skip) {
if (x->x_loop) pos = end;
else break;
}
}
/* Fill with zero in case of end */
n++;
while (n--)
for (i=0;i<c;i++)
*out[i]++ = 0;
}
else {
while (n--) {
for (i=0;i<c;i++)
*out[i]++ = 0.;
}
}
x->x_pos = pos;
return (w+c+4);
}
static void sfread_float(t_sfread *x, t_floatarg f)
{
int t = f;
if (t && x->x_mapaddr) {
x->x_play=1;
}
else {
x->x_play=0;
}
}
static void sfread_loop(t_sfread *x, t_floatarg f)
{
x->x_loop = f;
}
static void sfread_size(t_sfread* x)
{
t_atom a;
SETFLOAT(&a,x->x_size*0.5/x->x_channels);
outlet_list(x->x_bangout, gensym("size"),1,&a);
}
static void sfread_state(t_sfread* x)
{
t_atom a;
SETFLOAT(&a,x->x_play);
outlet_list(x->x_bangout, gensym("state"),1,&a);
}
static void sfread_bang(t_sfread* x)
{
x->x_pos = x->x_skip;
sfread_float(x,1.0);
}
static void sfread_dsp(t_sfread *x, t_signal **sp)
{
/* post("sfread: dsp"); */
switch (x->x_channels) {
case 1:
dsp_add(sfread_perform, 4, x, sp[0]->s_vec,
sp[1]->s_vec, sp[0]->s_n);
break;
case 2:
dsp_add(sfread_perform, 5, x, sp[0]->s_vec,
sp[1]->s_vec,sp[2]->s_vec, sp[0]->s_n);
break;
case 4:
dsp_add(sfread_perform, 6, x, sp[0]->s_vec,
sp[1]->s_vec,sp[2]->s_vec,
sp[3]->s_vec,sp[4]->s_vec,
sp[0]->s_n);
break;
}
}
static void sfread_speed(t_sfread* x, t_floatarg f)
{
x->x_speed = ftofix(f);
}
static void sfread_offset(t_sfread* x, t_floatarg f)
{
x->x_pos = (int)f;
}
static void *sfread_new(t_floatarg chan,t_floatarg skip)
{
#ifdef ROCKBOX
(void) skip;
#endif
t_sfread *x = (t_sfread *)pd_new(sfread_class);
t_int c = chan;
x->x_glist = (t_glist*) canvas_getcurrent();
if (c<1 || c > MAX_CHANS) c = 1;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
x->x_fd = -1;
x->x_mapaddr = NULL;
x->x_size = 0;
x->x_loop = 0;
x->x_channels = c;
x->x_mapaddr=NULL;
x->x_pos = 0;
x->x_skip = 0;
x->x_speed = ftofix(1.0);
x->x_play = 0;
while (c--) {
outlet_new(&x->x_obj, gensym("signal"));
}
x->x_bangout = outlet_new(&x->x_obj, &s_float);
return (x);
}
void sfread_tilde_setup(void)
{
/* sfread */
sfread_class = class_new(gensym("sfread~"), (t_newmethod)sfread_new, 0,
sizeof(t_sfread), 0,A_DEFFLOAT,A_DEFFLOAT,0);
class_addmethod(sfread_class, nullfn, gensym("signal"), 0);
class_addmethod(sfread_class, (t_method) sfread_dsp, gensym("dsp"), 0);
class_addmethod(sfread_class, (t_method) sfread_open, gensym("open"), A_SYMBOL,A_NULL);
class_addmethod(sfread_class, (t_method) sfread_size, gensym("size"), 0);
class_addmethod(sfread_class, (t_method) sfread_offset, gensym("ft1"), A_FLOAT, A_NULL);
class_addmethod(sfread_class, (t_method) sfread_speed, gensym("ft2"), A_FLOAT, A_NULL);
class_addmethod(sfread_class, (t_method) sfread_state, gensym("state"), 0);
class_addfloat(sfread_class, sfread_float);
class_addbang(sfread_class,sfread_bang);
class_addmethod(sfread_class,(t_method)sfread_loop,gensym("loop"),A_FLOAT,A_NULL);
}
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