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