feat(go4k&sointu): Export .h C header files from the songs using go, also automatically during build for the tests.

The header files are automatically generated during build. No need to #define anything; everything is fixed by the .asm file. This adds go as a dependency to run the unit tests, but this is probably not a bad thing, as go is probably needed anyway if one wants to actually start developing Sointu.

go4k/asmformat.go

@@ -11,6 +11,7 @@ import (
 
 func DeserializeAsm(asmcode string) (*Song, error) {
 	var bpm int
+	output16Bit := false
 	scanner := bufio.NewScanner(strings.NewReader(asmcode))
 	patterns := make([][]byte, 0)
 	tracks := make([]Track, 0)
@@ -86,6 +87,8 @@ func DeserializeAsm(asmcode string) (*Song, error) {
 							return nil, err
 						}
 						bpm = ints[0]
+					} else if defineName == "OUTPUT_16BIT" {
+						output16Bit = true
 					}
 				}
 			case "PATTERN":
@@ -158,7 +161,7 @@ func DeserializeAsm(asmcode string) (*Song, error) {
 			}
 		}
 	}
-	s := Song{BPM: bpm, Patterns: patterns, Tracks: tracks, Patch: patch}
+	s := Song{BPM: bpm, Patterns: patterns, Tracks: tracks, Patch: patch, Output16Bit: output16Bit}
 	return &s, nil
 }
 
@@ -252,6 +255,9 @@ func SerializeAsm(song *Song) (string, error) {
 	}
 	// The actual printing starts here
 	println("%%define BPM %d", song.BPM)
+	if song.Output16Bit {
+		println("%%define OUTPUT_16BIT")
+	}
 	// delay modulation is pretty much the only %define that the asm preprocessor cannot figure out
 	// as the preprocessor has no clue if a SEND modulates a delay unit. So, unfortunately, for the
 	// time being, we need to figure during export if INCLUDE_DELAY_MODULATION needs to be defined.
@@ -369,3 +375,68 @@ func SerializeAsm(song *Song) (string, error) {
 	ret := b.String()
 	return ret, nil
 }
+
+func ExportCHeader(song *Song, maxSamples int) string {
+	template :=
+		`// auto-generated by Sointu, editing not recommended
+#ifndef SU_RENDER_H
+#define SU_RENDER_H
+
+#define SU_MAX_SAMPLES     %v
+#define SU_BUFFER_LENGTH   (SU_MAX_SAMPLES*2)
+
+#define SU_SAMPLE_RATE     44100
+#define SU_BPM             %v
+#define SU_PATTERN_SIZE    %v
+#define SU_MAX_PATTERNS    %v
+#define SU_TOTAL_ROWS      (SU_MAX_PATTERNS*SU_PATTERN_SIZE)
+#define SU_SAMPLES_PER_ROW (SU_SAMPLE_RATE*4*60/(SU_BPM*16))
+
+#include <stdint.h>
+#if UINTPTR_MAX == 0xffffffff
+    #if defined(__clang__) || defined(__GNUC__)
+        #define SU_CALLCONV __attribute__ ((stdcall))
+    #elif defined(_WIN32)
+        #define SU_CALLCONV __stdcall
+    #endif
+#else
+    #define SU_CALLCONV
+#endif
+
+typedef %v SUsample;
+#define SU_SAMPLE_RANGE %v
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void SU_CALLCONV su_render_song(SUsample *buffer);
+%v
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+`
+	maxSamplesText := "SU_TOTAL_ROWS*SU_SAMPLES_PER_ROW"
+	if maxSamples > 0 {
+		maxSamplesText = fmt.Sprintf("%v", maxSamples)
+	}
+	sampleType := "float"
+	sampleRange := "1.0f"
+	if song.Output16Bit {
+		sampleType = "short"
+		sampleRange = "32768"
+	}
+	defineGmdls := ""
+	for _, instr := range song.Patch.Instruments {
+		for _, unit := range instr.Units {
+			if unit.Type == "oscillator" && unit.Parameters["type"] == Sample {
+				defineGmdls = "\n#define SU_LOAD_GMDLS\nvoid SU_CALLCONV su_load_gmdls(void);"
+				break
+			}
+		}
+	}
+	header := fmt.Sprintf(template, maxSamplesText, song.BPM, song.PatternRows(), song.SequenceLength(), sampleType, sampleRange, defineGmdls)
+	return header
+}