add SCALE0 op

CHANGELOG.md

@@ -24,6 +24,7 @@
 - **FIX**: fix MIDI IN ops channel number being off by 1
 - **FIX**: improve `TR.P` accuracy
 - **FIX**: fix `KILL` not stopping TR pulses in progress
+- **NEW**: new op: `SCALE0` / `SCL0`
 
 ## v4.0.0
 

docs/ops/maths.toml

@@ -269,6 +269,11 @@ prototype = "SCALE a b x y i"
 aliases = ["SCL"]
 short = "scale `i` from range `a` to `b` to range `x` to `y`, i.e. `i * (y - x) / (b - a)`"
 
+[SCALE0]
+prototype = "SCALE a b i"
+aliases = ["SCL0"]
+short = "scale `i` from range `0` to `a` to range `0` to `b`"
+
 [ER]
 prototype = "ER f l i"
 short = "Euclidean rhythm, `f` is fill (`1-32`), `l` is length (`1-32`) and `i` is step (any value), returns `0` or `1`"

docs/whats_new.md

@@ -22,6 +22,7 @@
 - **FIX**: fix MIDI IN ops channel number being off by 1
 - **FIX**: improve `TR.P` accuracy
 - **FIX**: fix `KILL` not stopping TR pulses in progress
+- **NEW**: new op: `SCALE0` / `SCL0`
 
 ## v4.0.0
 

module/help_mode.c

@@ -281,7 +281,7 @@ const char* help4[HELP4_LENGTH] = { "4/17 DATA AND TABLES",
                                     "   S = STEP (0-15)"                                     
                                     };
 
-#define HELP5_LENGTH 128
+#define HELP5_LENGTH 130
 const char* help5[HELP5_LENGTH] = { "5/17 OPERATORS",
                                     " ",
                                     "RAND A|RANDOM 0 - A",
@@ -341,6 +341,8 @@ const char* help5[HELP5_LENGTH] = { "5/17 OPERATORS",
                                     "WRAP A B C|WRAP A AROUND B-C",
                                     "SCALE A B X Y I",
                                     "    SCALE I FROM A..B TO X..Y",
+                                    "SCALE0 A B I",
+                                    "    SCALE I FROM 0..A TO 0..B",
                                     "QT A B|QUANTIZE A TO B*X",
                                     "QT.S X R S|QUANTIZE TO SCALE",
                                     "   X = INPUT *",

src/match_token.rl

@@ -243,6 +243,8 @@
         "JI"          => { MATCH_OP(E_OP_JI); };
         "SCALE"       => { MATCH_OP(E_OP_SCALE); };
         "SCL"         => { MATCH_OP(E_OP_SCL); };
+        "SCALE0"      => { MATCH_OP(E_OP_SCALE0); };
+        "SCL0"        => { MATCH_OP(E_OP_SCL0); };
         "N"           => { MATCH_OP(E_OP_N); };
         "VN"          => { MATCH_OP(E_OP_VN); };
         "HZ"          => { MATCH_OP(E_OP_HZ); };

src/ops/maths.c

@@ -111,6 +111,8 @@ static void op_JI_get(const void *data, scene_state_t *ss, exec_state_t *es,
                       command_state_t *cs);
 static void op_SCALE_get(const void *data, scene_state_t *ss, exec_state_t *es,
                          command_state_t *cs);
+static void op_SCALE0_get(const void *data, scene_state_t *ss, exec_state_t *es,
+                          command_state_t *cs);
 static void op_N_get(const void *data, scene_state_t *ss, exec_state_t *es,
                      command_state_t *cs);
 static void op_VN_get(const void *data, scene_state_t *ss, exec_state_t *es,
@@ -233,6 +235,8 @@ const tele_op_t op_OR4   = MAKE_GET_OP(OR4     , op_OR4_get     , 4, true);
 const tele_op_t op_JI    = MAKE_GET_OP(JI      , op_JI_get      , 2, true);
 const tele_op_t op_SCALE = MAKE_GET_OP(SCALE   , op_SCALE_get   , 5, true);
 const tele_op_t op_SCL   = MAKE_GET_OP(SCL     , op_SCALE_get   , 5, true);
+const tele_op_t op_SCALE0 = MAKE_GET_OP(SCALE0 , op_SCALE0_get  , 3, true);
+const tele_op_t op_SCL0  = MAKE_GET_OP(SCL0    , op_SCALE0_get  , 3, true);
 const tele_op_t op_N     = MAKE_GET_OP(N       , op_N_get       , 1, true);
 const tele_op_t op_VN    = MAKE_GET_OP(VN      , op_VN_get      , 1, true);
 const tele_op_t op_HZ    = MAKE_GET_OP(HZ      , op_HZ_get      , 1, true);
@@ -970,6 +974,26 @@ static void op_SCALE_get(const void *NOTUSED(data), scene_state_t *NOTUSED(ss),
     cs_push(cs, result + x);
 }
 
+static void op_SCALE0_get(const void *NOTUSED(data), scene_state_t *NOTUSED(ss),
+                          exec_state_t *NOTUSED(es), command_state_t *cs) {
+    int32_t b, y, i;
+    int32_t a = 0;
+    b = cs_pop(cs);
+    int32_t x = 0;
+    y = cs_pop(cs);
+    i = cs_pop(cs);
+
+    if ((b - a) == 0) {
+        cs_push(cs, 0);
+        return;
+    }
+
+    int32_t result = (i - a) * (y - x) * 2 / (b - a);
+    result = result / 2 + (result & 1);  // rounding
+
+    cs_push(cs, result + x);
+}
+
 static void op_N_get(const void *NOTUSED(data), scene_state_t *NOTUSED(ss),
                      exec_state_t *NOTUSED(es), command_state_t *cs) {
     int16_t a = cs_pop(cs);
@@ -1256,7 +1280,7 @@ static void op_BPM_get(const void *NOTUSED(data), scene_state_t *NOTUSED(ss),
     if (a < 2) a = 2;
     if (a > 1000) a = 1000;
     ret = ((((uint32_t)(1 << 31)) / ((a << 20) / 60)) * 1000) >> 10;
-    ret = ret / 2 + (ret & 1); // rounding
+    ret = ret / 2 + (ret & 1);  // rounding
     cs_push(cs, (int16_t)ret);
 }
 

src/ops/maths.h

@@ -55,6 +55,8 @@ extern const tele_op_t op_OR4;
 extern const tele_op_t op_JI;
 extern const tele_op_t op_SCALE;
 extern const tele_op_t op_SCL;
+extern const tele_op_t op_SCALE0;
+extern const tele_op_t op_SCL0;
 extern const tele_op_t op_N;
 extern const tele_op_t op_VN;
 extern const tele_op_t op_HZ;

src/ops/op.c

@@ -94,16 +94,16 @@ const tele_op_t *tele_ops[E_OP__LENGTH] = {
     &op_AVG, &op_EQ, &op_NE, &op_LT, &op_GT, &op_LTE, &op_GTE, &op_INR,
     &op_OUTR, &op_INRI, &op_OUTRI, &op_NZ, &op_EZ, &op_RSH, &op_LSH, &op_LROT,
     &op_RROT, &op_EXP, &op_ABS, &op_SGN, &op_AND, &op_OR, &op_AND3, &op_OR3,
-    &op_AND4, &op_OR4, &op_JI, &op_SCALE, &op_SCL, &op_N, &op_VN, &op_HZ,
-    &op_N_S, &op_N_C, &op_N_CS, &op_N_B, &op_N_BX, &op_V, &op_VV, &op_ER,
-    &op_NR, &op_DR_T, &op_DR_P, &op_DR_V, &op_BPM, &op_BIT_OR, &op_BIT_AND,
-    &op_BIT_NOT, &op_BIT_XOR, &op_BSET, &op_BGET, &op_BCLR, &op_BTOG, &op_BREV,
-    &op_XOR, &op_CHAOS, &op_CHAOS_R, &op_CHAOS_ALG, &op_SYM_PLUS, &op_SYM_DASH,
-    &op_SYM_STAR, &op_SYM_FORWARD_SLASH, &op_SYM_PERCENTAGE, &op_SYM_EQUAL_x2,
-    &op_SYM_EXCLAMATION_EQUAL, &op_SYM_LEFT_ANGLED, &op_SYM_RIGHT_ANGLED,
-    &op_SYM_LEFT_ANGLED_EQUAL, &op_SYM_RIGHT_ANGLED_EQUAL,
-    &op_SYM_RIGHT_ANGLED_LEFT_ANGLED, &op_SYM_LEFT_ANGLED_RIGHT_ANGLED,
-    &op_SYM_RIGHT_ANGLED_EQUAL_LEFT_ANGLED,
+    &op_AND4, &op_OR4, &op_JI, &op_SCALE, &op_SCL, &op_SCALE0, &op_SCL0, &op_N,
+    &op_VN, &op_HZ, &op_N_S, &op_N_C, &op_N_CS, &op_N_B, &op_N_BX, &op_V,
+    &op_VV, &op_ER, &op_NR, &op_DR_T, &op_DR_P, &op_DR_V, &op_BPM, &op_BIT_OR,
+    &op_BIT_AND, &op_BIT_NOT, &op_BIT_XOR, &op_BSET, &op_BGET, &op_BCLR,
+    &op_BTOG, &op_BREV, &op_XOR, &op_CHAOS, &op_CHAOS_R, &op_CHAOS_ALG,
+    &op_SYM_PLUS, &op_SYM_DASH, &op_SYM_STAR, &op_SYM_FORWARD_SLASH,
+    &op_SYM_PERCENTAGE, &op_SYM_EQUAL_x2, &op_SYM_EXCLAMATION_EQUAL,
+    &op_SYM_LEFT_ANGLED, &op_SYM_RIGHT_ANGLED, &op_SYM_LEFT_ANGLED_EQUAL,
+    &op_SYM_RIGHT_ANGLED_EQUAL, &op_SYM_RIGHT_ANGLED_LEFT_ANGLED,
+    &op_SYM_LEFT_ANGLED_RIGHT_ANGLED, &op_SYM_RIGHT_ANGLED_EQUAL_LEFT_ANGLED,
     &op_SYM_LEFT_ANGLED_EQUAL_RIGHT_ANGLED, &op_SYM_EXCLAMATION,
     &op_SYM_LEFT_ANGLED_x2, &op_SYM_RIGHT_ANGLED_x2, &op_SYM_LEFT_ANGLED_x3,
     &op_SYM_RIGHT_ANGLED_x3, &op_SYM_AMPERSAND_x2, &op_SYM_PIPE_x2,

src/ops/op_enum.h

@@ -216,6 +216,8 @@ typedef enum {
     E_OP_JI,
     E_OP_SCALE,
     E_OP_SCL,
+    E_OP_SCALE0,
+    E_OP_SCL0,
     E_OP_N,
     E_OP_VN,
     E_OP_HZ,