initial source

gopow/table.go

@@ -0,0 +1,177 @@
+package gopow
+
+import (
+	"image"
+	"image/color"
+	"io/ioutil"
+	"sort"
+	"strings"
+	"time"
+
+	log "github.com/Sirupsen/logrus"
+	"github.com/dustin/go-humanize"
+	"github.com/lucasb-eyer/go-colorful"
+)
+
+type TableComplex struct {
+	File string // our input file
+
+	Rows []*LineComplex
+
+	Min float64 // minimum power value, used for color rendering
+	Max float64 // maximum dito
+
+	FreqStart float64
+	FreqEnd   float64
+
+	Bins         int // horizontal slots, columns, bandwidth
+	Integrations int // vertical slots, rows
+
+	TimeStart time.Time // real time
+	TimeEnd   time.Time
+}
+
+func NewTable(file string) (*TableComplex, error) {
+
+	log.Debug("creating table")
+
+	t := &TableComplex{}
+
+	err := t.Load(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return t, nil
+}
+
+func (t *TableComplex) Load(file string) error {
+
+	log.Debug("loading table")
+
+	t.File = file
+
+	buff, err := ioutil.ReadFile(t.File)
+	if err != nil {
+		return err
+	}
+
+	log.WithFields(log.Fields{
+		"bytes": len(buff),
+		"size":  humanize.Bytes(uint64(len(buff))),
+	}).Debug("file loaded")
+
+	t.Rows = t.parseBuffer(buff)
+
+	return nil
+}
+
+func (t *TableComplex) parseBuffer(filebuffer []byte) []*LineComplex {
+
+	t.Max = float64(-99999999)
+	t.Min = float64(99999999)
+
+	block := string(filebuffer)
+	lines := strings.Split(block, "\n")
+
+	table := map[string][]*LineComplex{}
+
+	for _, l := range lines {
+
+		cells := strings.Split(l, ",")
+		line := NewLineComplex(cells)
+
+		if table[line.Hash] == nil {
+			table[line.Hash] = []*LineComplex{}
+		}
+
+		table[line.Hash] = append(table[line.Hash], line)
+	}
+
+	rows := []*LineComplex{}
+
+	// loop over hash keys with lines
+	for _, lines := range table {
+
+		row := t.IntegrateLines(lines)
+
+		if row != nil {
+
+			rows = append(rows, row)
+
+			if t.Min > row.LowSample() {
+				t.Min = row.LowSample()
+			}
+
+			if t.Max < row.HighSample() {
+				t.Max = row.HighSample()
+			}
+		}
+	}
+
+	sort.Sort(LineSort(rows))
+
+	log.WithFields(log.Fields{
+		"pMax": t.Max,
+		"pMin": t.Min,
+	}).Debug("integrated lines")
+
+	t.Integrations = len(rows)
+
+	if t.Integrations > 0 {
+		t.Bins = len(rows[0].Samples)
+	} else {
+		log.Fatal("no samples found")
+	}
+
+	log.WithFields(log.Fields{
+		"bins":         t.Bins,
+		"integrations": t.Integrations,
+	}).Debug("parsed table")
+
+	return rows
+}
+
+func (t *TableComplex) Image() *image.RGBA {
+
+	log.WithFields(log.Fields{
+		"width":  t.Bins,
+		"height": t.Integrations,
+	}).Debug("create image")
+
+	return image.NewRGBA(image.Rect(0, 0, int(t.Bins), int(t.Integrations)))
+}
+
+func (t *TableComplex) IntegrateLines(lines []*LineComplex) *LineComplex {
+
+	if len(lines) == 0 {
+		return nil
+	}
+
+	masterline := lines[0]
+	for i, l := range lines {
+		if i > 0 {
+			masterline.AddSamples(l)
+		}
+
+	}
+
+	return masterline
+}
+
+func (t *TableComplex) ColorAt(x, y int) color.Color {
+
+	cell := t.Rows[y].Sample(x)
+
+	hue_start := 236.0
+	hue_end := 0.0
+
+	span := (t.Min - t.Max) * -1
+	h_per_deg := (hue_start - hue_end) / span
+	pow_normalized := cell - t.Min
+	pow_degrees := pow_normalized * h_per_deg
+	hue := hue_start - pow_degrees
+
+	return colorful.Hsv(hue, 1, 0.8)
+
+}