From eabea6ce267a176181e165fb5e00c621eaecb757 Mon Sep 17 00:00:00 2001
From: Trek H <trek.hopton@gmail.com>
Date: Mon, 11 Feb 2019 11:01:38 +1030
Subject: [PATCH] ADPCM: removed unneccessary code for commands and updated
 their file names

---
 cmd/adpcm/cmd/decode-pcm/decode-pcm.go | 45 ++++++++++++++++++++++++++
 cmd/adpcm/cmd/encode-pcm/encode-pcm.go | 43 ++++++++++++++++++++++++
 2 files changed, 88 insertions(+)
 create mode 100644 cmd/adpcm/cmd/decode-pcm/decode-pcm.go
 create mode 100644 cmd/adpcm/cmd/encode-pcm/encode-pcm.go

diff --git a/cmd/adpcm/cmd/decode-pcm/decode-pcm.go b/cmd/adpcm/cmd/decode-pcm/decode-pcm.go
new file mode 100644
index 00000000..3c375de1
--- /dev/null
+++ b/cmd/adpcm/cmd/decode-pcm/decode-pcm.go
@@ -0,0 +1,45 @@
+package main
+
+import (
+	"flag"
+	"io/ioutil"
+
+	"bitbucket.org/ausocean/av/cmd/adpcm"
+)
+
+// This program accepts an input file encoded in adpcm and outputs a decoded pcm file.
+// Input and output file names can be specified as arguments.
+func main() {
+	var inPath string
+	var outPath string
+
+	flag.StringVar(&inPath, "in", "encoded.adpcm", "file path of input")
+	flag.StringVar(&outPath, "out", "decoded.pcm", "file path of output data")
+	flag.Parse()
+	//read adpcm
+	comp, err := ioutil.ReadFile(inPath)
+	if err != nil {
+		panic(err)
+	}
+	//decode adpcm
+	var decoded []byte
+	start := 0
+	for i := 0; i < len(comp); i++ {
+		if i%256 == 255 {
+			block := comp[start : i+1]
+			decBlock, err := adpcm.DecodeBlock(block)
+			if err != nil {
+				//todo: use correct logging of error
+				panic(err)
+			}
+			decoded = append(decoded, decBlock...)
+			start = i + 1
+		}
+	}
+	// save pcm to file
+	err = ioutil.WriteFile(outPath, decoded, 0644)
+	if err != nil {
+		panic(err)
+	}
+
+}
diff --git a/cmd/adpcm/cmd/encode-pcm/encode-pcm.go b/cmd/adpcm/cmd/encode-pcm/encode-pcm.go
new file mode 100644
index 00000000..57c9fd22
--- /dev/null
+++ b/cmd/adpcm/cmd/encode-pcm/encode-pcm.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"flag"
+	"io/ioutil"
+
+	"bitbucket.org/ausocean/av/cmd/adpcm"
+)
+
+func main() {
+	var inPath string
+	var adpcmPath string
+	flag.StringVar(&inPath, "in", "data.pcm", "file path of input data")
+	flag.StringVar(&adpcmPath, "out", "encoded.adpcm", "file path of output")
+	flag.Parse()
+	//read pcm
+	pcm, err := ioutil.ReadFile(inPath)
+	if err != nil {
+		panic(err)
+	}
+
+	//encode adpcm
+	var comp []byte
+	start := 0
+	for i := 0; i < len(pcm); i++ {
+		if i%1010 == 1009 {
+			block := pcm[start : i+1]
+
+			encBlock, err := adpcm.EncodeBlock(block)
+			if err != nil {
+				//todo: use correct logging of error
+				panic(err)
+			}
+			comp = append(comp, encBlock...)
+			start = i + 1
+		}
+	}
+	// save adpcm to file
+	err = ioutil.WriteFile(adpcmPath, comp, 0644)
+	if err != nil {
+		panic(err)
+	}
+}