shithub: soundpipe

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added gen_triangle

--- a/h/ftbl.h

+++ b/h/ftbl.h

@@ -14,3 +14,4 @@

 int sp_ftbl_loadspa(sp_data *sp, sp_ftbl **ft, const char *filename);

 int sp_gen_vals(sp_data *sp, sp_ftbl *ft, const char *string);

 int sp_gen_sine(sp_data *sp, sp_ftbl *ft);

+void sp_gen_triangle(sp_data *sp, sp_ftbl *ft);

--- a/modules/ftbl.c

+++ b/modules/ftbl.c

@@ -104,3 +104,26 @@

     }

     return SP_OK;

 }

+

+void sp_gen_triangle(sp_data *sp, sp_ftbl *ft)

+{

+    unsigned int i;

+    unsigned int counter;

+    SPFLOAT incr;

+    int step;

+

+    incr = 1.0f / (SPFLOAT)ft->size;

+    incr *= 2;

+

+    step = 1;

+

+    counter = 0;

+

+    for (i = 0; i < ft->size; i++) {

+        if (i == ft->size / 2) {

+            step = -1;

+        }

+        ft->tbl[i] = (2.f*(counter * incr) - 1.f);

+        counter += step;

+    }

+}