maker func

go/producer.go

@@ -2,9 +2,89 @@ package main
 
 import (
 	"remixoscope"
+	"os"
 	"fmt"
+	"math"
+	ioutil "io/ioutil"
+	"strconv"
+	"strings"
+	binary "encoding/binary"
 )
 
+type source struct {
+	filename string
+	beats []remixoscope.Beat
+}
+
+type ByteArrayReader struct {
+	source []byte
+}
+
+func (s *ByteArrayReader) Read(p []byte) (n int, err os.Error) {
+	max := len(p)
+	c := len(s.source)
+	err = nil
+	if c >= max {
+		for i, v := range s.source[0:max] {
+			p[i] = v
+		}
+		n = max
+	} else {
+		for i, v := range s.source[0:c] {
+			p[i] = v
+		}
+		n = c
+		err = os.EOF
+	}
+	s.source = s.source[n:]
+	return n, err
+}
+
+func inputMapFromOutput(filename string) (bandcount uint, inputs *map[string]source) {
+	inputs = new(map[string]source)
+	contents, err := ioutil.ReadFile(filename)
+	if err != nil {
+		panic(err)
+	}
+
+	b := strings.Index(string(contents), "|")
+	bandcount, err = strconv.Atoui(string(contents[0:strings.Index(string(contents), "|")]))
+	if err != nil {
+		panic(err)
+	}
+	contents = contents[b+1:]
+	done := false
+	var s source
+	for ; !done; {
+		b = strings.Index(string(contents), "|")
+		infile := string(contents[0:b])
+		contents = contents[b+1:]
+
+		b = strings.Index(string(contents), "|")
+		var beatcount uint
+		beatcount, err = strconv.Atoui(string(contents[0:b]))
+		contents = contents[b+1:]
+
+		s.beats = make([]remixoscope.Beat, 0)
+
+		bar := new(ByteArrayReader)
+		bar.source = contents
+		for i := uint(0); i < beatcount; i++ {
+			s.beats = append(s.beats, remixoscope.Beat{make([]remixoscope.Frame, 0)})
+			for j := uint(0); j < bandcount; j++ {
+				s.beats[i].Frames = append(s.beats[i].Frames, remixoscope.Frame{})
+				var out uint64
+				binary.Read(bar, binary.BigEndian, &out)
+				s.beats[i].Frames[j].Left = math.Float64frombits(out)
+				binary.Read(bar, binary.BigEndian, &out)
+				s.beats[i].Frames[j].Right = math.Float64frombits(out)
+			}
+		}
+		(*inputs)[infile] = s
+	}
+	return bandcount, inputs
+}
+
 func main() {
 	var f remixoscope.Soxsample = 4
 	fmt.Printf("%d\n", f)