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authordieter kovacic <d13@users.sourceforge.net>2002-07-09 12:41:56 +0000
committerdieter kovacic <d13@users.sourceforge.net>2002-07-09 12:41:56 +0000
commit7312e58d17e331d71d4f47e21bf15499609bace8 (patch)
tree23e7fba2466041f82bc29ce4adf5e7ac35d2d508 /sfread.c
This commit was generated by cvs2svn to compensate for changes in r33,svn2git-root
which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/ext13/; revision=34
Diffstat (limited to 'sfread.c')
-rw-r--r--sfread.c376
1 files changed, 376 insertions, 0 deletions
diff --git a/sfread.c b/sfread.c
new file mode 100644
index 0000000..ad78060
--- /dev/null
+++ b/sfread.c
@@ -0,0 +1,376 @@
+#include "m_pd.h"
+#include "g_canvas.h"
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+/* ------------------------ 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_sfread;
+
+
+void sfread_open(t_sfread *x,t_symbol *filename)
+{
+ struct stat fstate;
+ char fname[MAXPDSTRING];
+
+ 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);
+ 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;
+ t_float* out[MAX_CHANS];
+
+ for (i=0;i<c;i++)
+ out[i] = (t_float *)(w[3+i]);
+ n = (int)(w[3+c]);
+
+ /* loop */
+
+ if (x->x_skip*c > x->x_size/sizeof(short))
+ x->x_skip = x->x_size/sizeof(short);
+
+ if (offset + n*c*speed > x->x_size/sizeof(short)) {
+ if (!x->x_loop)
+ x->x_play=0;
+ else {
+ offset = x->x_skip;
+ }
+ }
+
+ if (offset + n*c*speed < 0) {
+ if (!x->x_loop)
+ x->x_play=0;
+ else {
+ offset = x->x_size/(sizeof(short));
+ }
+ }
+
+
+
+ if (x->x_play && x->x_mapaddr) {
+ float aoff = (((int)offset)>>1)<<1;
+ while (n--) {
+ for (i=0;i<c;i++) {
+ *out[i]++ = *(buf+(int)aoff+i)/32768.;
+ }
+ offset+=speed*c;
+ aoff = (((int)offset)>>1)<<1;
+ }
+ }
+ else {
+ while (n--) {
+ for (i=0;i<c;i++)
+ *out[i]++ = 0.;
+ }
+ }
+ x->x_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_play=1;
+ }
+ else {
+ x->x_play=0;
+ }
+
+}
+
+static void sfread_loop(t_sfread *x, t_floatarg f)
+{
+ x->x_loop = f;
+}
+
+
+
+
+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_skip);
+ floatinlet_new(&x->x_obj, &x->x_speed);
+
+
+ x->x_fd = -1;
+ x->x_mapaddr = NULL;
+
+ 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"));
+ }
+
+/* post("sfread: x_channels = %d, x_speed = %f",x->x_channels,x->x_speed);*/
+
+ return (x);
+}
+
+/*
+ * ------------------------------------------- sfwrite~ -------------------------------
+ */
+
+
+
+static t_class *sfwrite_class;
+
+typedef struct _sfwrite
+{
+ t_object x_obj;
+ t_symbol* filename;
+ FILE* x_file;
+
+ t_int rec;
+ t_int x_channels;
+ t_int size;
+} t_sfwrite;
+
+
+static void sfwrite_open(t_sfwrite *x,t_symbol *filename)
+{
+ post("sfwrite: open");
+ x->filename = filename;
+ post("sfwrite: filename = %s",x->filename->s_name);
+
+ if ((x->x_file = fopen(x->filename->s_name,"w")) < 0)
+ {
+ error("can't create %s",filename->s_name);
+ return;
+ }
+}
+
+static void sfwrite_float(t_sfwrite *x, t_floatarg f)
+{
+ int t = f;
+ if (t) {
+ post("sfwrite: start", f);
+ x->rec=1;
+ }
+ else {
+ post("sfwrite: stop", f);
+ x->rec=0;
+ }
+
+}
+
+
+static short out[4*64];
+
+static t_int *sfwrite_perform(t_int *w)
+{
+ t_sfwrite* x = (t_sfwrite*)(w[1]);
+ t_float * in[4];
+ int c = x->x_channels;
+ int i,n;
+ short* tout = out;
+
+ for (i=0;i < c;i++) {
+ in[i] = (t_float *)(w[2+i]);
+ }
+
+ n = (int)(w[2+c]);
+
+ /* loop */
+
+ if (x->rec && x->x_file) {
+
+ while (n--) {
+ for (i=0;i<c;i++) {
+ *tout++ = *(in[i])++ * 32768.;
+ }
+ }
+
+ fwrite(out,sizeof(short),64*c,x->x_file);
+ }
+ return (w+3+c);
+}
+
+
+
+static void sfwrite_dsp(t_sfwrite *x, t_signal **sp)
+{
+ post("sfwrite: dsp");
+ switch (x->x_channels) {
+ case 1:
+ dsp_add(sfwrite_perform, 3, x, sp[0]->s_vec,
+ sp[0]->s_n);
+ break;
+ case 2:
+ dsp_add(sfwrite_perform, 4, x, sp[0]->s_vec,
+ sp[1]->s_vec, sp[0]->s_n);
+ break;
+ case 4:
+ dsp_add(sfwrite_perform, 6, x, sp[0]->s_vec,
+ sp[1]->s_vec,
+ sp[2]->s_vec,
+ sp[3]->s_vec,
+ sp[0]->s_n);
+ break;
+ }
+ post("sfwrite: dsp end");
+}
+
+
+static void *sfwrite_new(t_floatarg chan)
+{
+ t_sfwrite *x = (t_sfwrite *)pd_new(sfwrite_class);
+ t_int c = chan;
+
+ post("sfwrite: x_channels = %d, ",c);
+
+ if (c<1 || c > MAX_CHANS) c = 1;
+ x->x_channels = c--;
+ x->x_file=NULL;
+ x->rec = 0;
+ while (c--) {
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+ }
+
+
+ return (x);
+}
+
+void sfwrite_setup(void)
+{
+ sfwrite_class = class_new(gensym("sfwrite~"), (t_newmethod)sfwrite_new, 0,
+ sizeof(t_sfwrite), 0,A_DEFFLOAT,0);
+ class_addmethod(sfwrite_class,nullfn,gensym("signal"), 0);
+ class_addmethod(sfwrite_class, (t_method) sfwrite_dsp, gensym("dsp"), 0);
+ class_addmethod(sfwrite_class, (t_method) sfwrite_open, gensym("open"), A_SYMBOL,A_NULL);
+ class_addfloat(sfwrite_class, sfwrite_float);
+
+}
+
+
+void sfread_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_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);
+
+}
+
+
+
+
+
+