From 0d3025b170012a689793a42060bfdcc59843d057 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Thu, 4 Aug 2016 18:52:59 +0200
Subject: added sine:// fetcher


diff --git a/rhimport/fetcher.go b/rhimport/fetcher.go
index 1a40e71..db7ac3e 100644
--- a/rhimport/fetcher.go
+++ b/rhimport/fetcher.go
@@ -621,7 +621,43 @@ func fetchFileSilence(ctx *Context, res *Result, uri *url.URL) error {
 		return err
 	}
 	size := wav.GetFileSize()
-	wav.generator = NewSilenceGenerator()
+	wav.generator = newSilenceGenerator()
+
+	ctx.reportProgress(1, "fetching", 0.0, float64(size))
+	return fetchFileConvert(ctx, res, wav, int64(size))
+}
+
+//***********************
+//**   sine://
+
+func fetchFileSine(ctx *Context, res *Result, uri *url.URL) error {
+	ctx.dbglog.Printf("Sine-Wave fetcher for '%s'", ctx.SourceUri)
+
+	d, err := strconv.ParseUint(uri.Host, 10, 32)
+	if err != nil {
+		res.ResponseCode = http.StatusBadRequest
+		res.ErrorString = "invalid duration (must be a positive integer)"
+		return nil
+	}
+	duration := time.Duration(d) * 100 * time.Millisecond
+
+	f, err := strconv.ParseUint(strings.TrimPrefix(uri.Path, "/"), 10, 32)
+	if err != nil {
+		res.ResponseCode = http.StatusBadRequest
+		res.ErrorString = fmt.Sprintf("invalid frequency: (must be a positive integer)")
+		return nil
+	}
+	frequency := float64(f)
+
+	ctx.SourceFile = "sine.wav"
+	ctx.Title = fmt.Sprintf("%v of @ %.1f Hz...", duration, frequency)
+	ctx.ExtraMetaData["TITLE"] = ctx.Title
+	wav, err := newPCMWavFile(uint32(ctx.conf.SampleRate), 16, uint16(ctx.Channels), duration)
+	if err != nil {
+		return err
+	}
+	size := wav.GetFileSize()
+	wav.generator = newSinusGenerator(0.0, frequency)
 
 	ctx.reportProgress(1, "fetching", 0.0, float64(size))
 	return fetchFileConvert(ctx, res, wav, int64(size))
@@ -665,9 +701,10 @@ type fetchFunc func(*Context, *Result, *url.URL) (err error)
 
 var (
 	fetchers = map[string]fetchFunc{
-		"local":      fetchFileLocal,
 		"tmp":        fetchFileTmp,
+		"local":      fetchFileLocal,
 		"silence":    fetchFileSilence,
+		"sine":       fetchFileSine,
 		"attachment": fetchFileAttachment,
 	}
 	curlProtos = map[string]bool{
diff --git a/rhimport/wave_generator.go b/rhimport/wave_generator.go
index 7816bc0..0f2f16d 100644
--- a/rhimport/wave_generator.go
+++ b/rhimport/wave_generator.go
@@ -176,7 +176,7 @@ func newPCMWavFile(sampleRate uint32, sampleDepth uint16, channels uint16, lengt
 type silenceGenerator struct {
 }
 
-func NewSilenceGenerator() *silenceGenerator {
+func newSilenceGenerator() *silenceGenerator {
 	return &silenceGenerator{}
 }
 
-- 
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