From fc3d3c0a4f110a23335398c327ac0a4fc949d5cb Mon Sep 17 00:00:00 2001 From: Guenter Geiger Date: Mon, 17 Jun 2002 10:13:57 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r12, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/ggee/; revision=13 --- signal/sfread~.c | 317 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100755 signal/sfread~.c (limited to 'signal/sfread~.c') diff --git a/signal/sfread~.c b/signal/sfread~.c new file mode 100755 index 0000000..6cb97ab --- /dev/null +++ b/signal/sfread~.c @@ -0,0 +1,317 @@ +/* (C) Guenter Geiger */ + + +#include +/*#include */ +#include "g_canvas.h" +#ifdef NT +#pragma warning( disable : 4244 ) +#pragma warning( disable : 4305 ) +#endif + +#include +#include +#ifndef NT +#include +#include +#else +#include +#endif + + +#include +#include + +/* ------------------------ sfread~ ----------------------------- */ + +#ifdef NT +#define BINREADMODE "rb" +#else +#define BINREADMODE "r" +#endif + +static t_class *sfread_class; + + +typedef struct _sfread +{ + t_object x_obj; + void* x_mapaddr; + int x_fd; + + t_int x_play; + t_int x_channels; + t_int x_size; + t_int x_loop; + t_float x_offset; + t_float x_skip; + t_float x_speed; + + t_glist * x_glist; + t_outlet *x_bangout; +} t_sfread; + + +void sfread_open(t_sfread *x,t_symbol *filename) +{ + struct stat fstate; + 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 */ + + if (x->x_mapaddr) munmap(x->x_mapaddr,x->x_size); + 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 */ + + fstat(x->x_fd,&fstate); + x->x_size = fstate.st_size; + + /* map the file into memory */ + + if (!(x->x_mapaddr = mmap(NULL,x->x_size,PROT_READ,MAP_PRIVATE,x->x_fd,0))) + { + error("can't mmap %s",fname); + return; + } +} + +#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_float *in = (t_float *)(w[2]); will we need this (indexing) ?*/ + int c = x->x_channels; + t_float offset = x->x_offset*c; + t_float speed = x->x_speed; + int i,n; + int end = x->x_size/sizeof(short); + t_float* out[MAX_CHANS]; + + for (i=0;i end) + offset = end; + + if (offset + n*c*speed > end) { // playing forward end + if (!x->x_loop) { + x->x_play=0; + offset = x->x_skip*c; + } + } + + if (offset + n*c*speed < 0) { // playing backwards end + if (!x->x_loop) { + x->x_play=0; + offset = end; + } + + } + + + if (x->x_play && x->x_mapaddr) { + + if (speed != 1) { /* different speed */ + float aoff = (((int)offset)>>1)<<1; + while (n--) { + for (i=0;i>1)<<1; + if (aoff > end) { + if (x->x_loop) aoff = x->x_skip; + else break; + } + if (aoff < 0) { + if (x->x_loop) aoff = end; + else break; + } + } + /* Fill with zero in case of end */ + n++; + while (n--) + for (i=0;i>1)<<1; + while (n--) { + for (i=0;i end) { + if (x->x_loop) aoff = x->x_skip; + else break; + } + } + + /* Fill with zero in case of end */ + n++; + while (n--) + for (i=0;ix_offset = offset/c; /* this should always be integer !! */ + 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_offset = x->x_skip*x->x_channels; + 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_new(t_floatarg chan,t_floatarg skip) +{ + 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; + floatinlet_new(&x->x_obj, &x->x_offset); + floatinlet_new(&x->x_obj, &x->x_speed); + + + 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_offset = skip; + x->x_skip = skip; + x->x_speed = 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); + +/* post("sfread: x_channels = %d, x_speed = %f",x->x_channels,x->x_speed);*/ + + 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_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); + +} + + + + + + -- cgit v1.2.1