Merged in build-on-windows (pull request #285)

Make audio platform specific.

Approved-by: Trek Hopton <trek.hopton@gmail.com>
Approved-by: Saxon Milton <saxon.milton@gmail.com>
Approved-by: Alan Noble <anoble@gmail.com>

revid/audio_linux.go

@@ -0,0 +1,62 @@
+/*
+NAME
+  audio_linux.go
+
+AUTHORS
+  Alan Noble <alan@ausocean.org>
+
+LICENSE
+  revid is Copyright (C) 2019 the Australian Ocean Lab (AusOcean)
+
+  It is free software: you can redistribute it and/or modify them
+  under the terms of the GNU General Public License as published by the
+  Free Software Foundation, either version 3 of the License, or (at your
+  option) any later version.
+
+  It is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+  for more details.
+
+  You should have received a copy of the GNU General Public License
+  in gpl.txt.  If not, see http://www.gnu.org/licenses.
+*/
+
+package revid
+
+import (
+	"fmt"
+	"strconv"
+
+	"bitbucket.org/ausocean/av/codec/codecutil"
+	"bitbucket.org/ausocean/av/codec/pcm"
+	"bitbucket.org/ausocean/av/container/mts"
+	"bitbucket.org/ausocean/av/device/alsa"
+	"bitbucket.org/ausocean/utils/logger"
+)
+
+func (r *Revid) setupAudio() error {
+	mts.Meta.Add("sampleRate", strconv.Itoa(r.cfg.SampleRate))
+	mts.Meta.Add("channels", strconv.Itoa(r.cfg.Channels))
+	mts.Meta.Add("period", fmt.Sprintf("%.6f", r.cfg.RecPeriod))
+	mts.Meta.Add("bitDepth", strconv.Itoa(r.cfg.BitDepth))
+
+	switch r.cfg.InputCodec {
+	case codecutil.PCM:
+		mts.Meta.Add("codec", "pcm")
+	case codecutil.ADPCM:
+		mts.Meta.Add("codec", "adpcm")
+	default:
+		r.cfg.Logger.Log(logger.Fatal, pkg+"no audio codec set in config")
+	}
+
+	r.input = alsa.New(r.cfg.Logger)
+
+	l, err := codecutil.NewByteLexer(pcm.DataSize(r.cfg.SampleRate, r.cfg.Channels, r.cfg.BitDepth, r.cfg.RecPeriod, r.cfg.InputCodec))
+	if err != nil {
+		return err
+	}
+	r.lexTo = l.Lex
+
+	return nil
+}

revid/audio_windows.go

@@ -0,0 +1,33 @@
+/*
+NAME
+  audio_windows.go
+
+AUTHORS
+  Alan Noble <alan@ausocean.org>
+
+LICENSE
+  revid is Copyright (C) 2019 the Australian Ocean Lab (AusOcean)
+
+  It is free software: you can redistribute it and/or modify them
+  under the terms of the GNU General Public License as published by the
+  Free Software Foundation, either version 3 of the License, or (at your
+  option) any later version.
+
+  It is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+  for more details.
+
+  You should have received a copy of the GNU General Public License
+  in gpl.txt.  If not, see http://www.gnu.org/licenses.
+*/
+
+package revid
+
+import (
+	"errors"
+)
+
+func (r *Revid) setupAudio() error {
+	return errors.New("audio not implemented on Windows")
+}

revid/revid.go

@@ -42,11 +42,9 @@ import (
 	"bitbucket.org/ausocean/av/codec/h264"
 	"bitbucket.org/ausocean/av/codec/h265"
 	"bitbucket.org/ausocean/av/codec/mjpeg"
-	"bitbucket.org/ausocean/av/codec/pcm"
 	"bitbucket.org/ausocean/av/container/flv"
 	"bitbucket.org/ausocean/av/container/mts"
 	"bitbucket.org/ausocean/av/device"
-	"bitbucket.org/ausocean/av/device/alsa"
 	"bitbucket.org/ausocean/av/device/file"
 	"bitbucket.org/ausocean/av/device/geovision"
 	"bitbucket.org/ausocean/av/device/raspivid"
@@ -349,28 +347,10 @@ func (r *Revid) setupPipeline(mtsEnc func(dst io.WriteCloser, rate float64) (io.
 		}
 
 	case config.InputAudio:
-		mts.Meta.Add("sampleRate", strconv.Itoa(r.cfg.SampleRate))
+		err := r.setupAudio()
-		mts.Meta.Add("channels", strconv.Itoa(r.cfg.Channels))
-		mts.Meta.Add("period", fmt.Sprintf("%.6f", r.cfg.RecPeriod))
-		mts.Meta.Add("bitDepth", strconv.Itoa(r.cfg.BitDepth))
-
-		switch r.cfg.InputCodec {
-		case codecutil.PCM:
-			mts.Meta.Add("codec", "pcm")
-		case codecutil.ADPCM:
-			mts.Meta.Add("codec", "adpcm")
-		default:
-			r.cfg.Logger.Log(logger.Fatal, pkg+"no audio codec set in config")
-		}
-
-		r.input = alsa.New(r.cfg.Logger)
-
-		l, err := codecutil.NewByteLexer(pcm.DataSize(r.cfg.SampleRate, r.cfg.Channels, r.cfg.BitDepth, r.cfg.RecPeriod, r.cfg.InputCodec))
 		if err != nil {
 			return err
 		}
-		r.lexTo = l.Lex
-
 	}
 
 	// Configure the input device. We know that defaults are set, so no need to