looper: looper verisons for pi3 and for pi0

This commit is contained in:
Ella Pietraroia 2020-02-26 16:05:03 +10:30
parent 39dcf84e39
commit 53f4de6d5b
4 changed files with 226 additions and 1 deletions

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@ -0,0 +1,55 @@
/*
NAME
test-audio/README
AUTHORS
Ella Pietraroia <ella@ausocean.org>
LICENSE
revid is Copyright (C) 2017-2020 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.
*/
Pi Setup:
pull master
navigate to /go/src/bitbucket.org/ausocean/av/cmd/audio-player/looper
$sudo nano main.go
chage file variable at top of function to be wav file that you have put onto the pi (hint: spc command to put a new file on the pi)
and build
edit rc.local to run looper at boot
$sudo nano /etc/rc.local
paste this in after comments but before 'exit 0': -----------------------------------------------------------
exec 2> /tmp/rc.local.log # send stderr from rc.local to a log file
exec 1>&2 # send stdout to the same log file
printf "rc.local started" # show start of execution
set -x # tell sh to display commands before execution
AUDIOPATH=/home/pi/go/src/bitbucket.org/ausocean/av/cmd/audio-player/looper
cd $AUDIOPATH
./looper &
-----------------------------------------------------------------------------------------------------------------
$systemctl enable rc-local
$sudo systemctl start rc-local.service
after starting the service the looping should start straight away
Useful commands:
$cat /tmp/rc.local.log
$sudo systemctl status rc-local.service
$cat audio.log (in looper directory)
On computer
$scp something.wav pi@192.168.1.106:/home/pi

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@ -57,7 +57,6 @@ func main() {
defer f.Close()
log.SetOutput(f)
//alsactl ensures that the sound will be played through the correct soundcard
path, err := exec.LookPath("alsactl")
if err != nil {
log.Fatalf("fatal: didn't find 'alsactl' executable\n")
@ -65,6 +64,14 @@ func main() {
log.Printf("'alsactl' executable is in '%s'\n", path)
}
//alsactl ensures that the sound will be played through the correct soundcard
path, err = exec.LookPath("alsactl")
if err != nil {
log.Fatalf("fatal: didn't find 'alsactl' executable\n")
} else {
log.Printf("'alsactl' executable is in '%s'\n", path)
}
for {
cmdInit := exec.Command("alsactl", "-f", soundcardPath, "restore")
err := cmdInit.Run()

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@ -0,0 +1,55 @@
/*
NAME
test-audio/README
AUTHORS
Ella Pietraroia <ella@ausocean.org>
LICENSE
revid is Copyright (C) 2017-2020 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.
*/
Pi Setup:
pull master
navigate to /go/src/bitbucket.org/ausocean/av/cmd/audio-player/looper
$sudo nano main.go
chage file variable at top of function to be wav file that you have put onto the pi (hint: spc command to put a new file on the pi)
and build
edit rc.local to run looper at boot
$sudo nano /etc/rc.local
paste this in after comments but before 'exit 0': -----------------------------------------------------------
exec 2> /tmp/rc.local.log # send stderr from rc.local to a log file
exec 1>&2 # send stdout to the same log file
printf "rc.local started" # show start of execution
set -x # tell sh to display commands before execution
AUDIOPATH=/home/pi/go/src/bitbucket.org/ausocean/av/cmd/audio-player/looper3
cd $AUDIOPATH
./looper3 &
-----------------------------------------------------------------------------------------------------------------
$systemctl enable rc-local
$sudo systemctl start rc-local.service
after starting the service the looping should start straight away
Useful commands:
$cat /tmp/rc.local.log
$sudo systemctl status rc-local.service
$cat audio.log (in looper directory)
On computer
$scp something.wav pi@192.168.1.106:/home/pi

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@ -0,0 +1,108 @@
/*
NAME
test-audio/main.go
AUTHORS
Ella Pietraroia <ella@ausocean.org>
LICENSE
revid is Copyright (C) 2017-2020 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.
*/
//testing for underwater speaker audio playing on pi
package main
import (
"bytes"
"io"
"log"
"os"
"os/exec"
"sync"
)
func main() {
soundFile := "48khz.wav" //"5mStartToEndOfTrials.wav"
logFile := "audio.log"
//making log file
_, err := os.Stat(logFile)
if !os.IsNotExist(err) {
err := os.Remove(logFile)
if err != nil {
log.Fatalf("fatal: error clearing file: %v", err)
}
}
f, err := os.OpenFile(logFile, os.O_RDWR|os.O_CREATE, 0666) //chage to empty each time
if err != nil {
log.Fatalf("fatal: error opening file %s: %v", logFile, err)
}
defer f.Close()
log.SetOutput(f)
//making sure that play is on pi
path, err := exec.LookPath("omxplayer")
if err != nil {
log.Fatalf("fatal: didn't find 'omxplayer' executable\n")
} else {
log.Printf("'omxplayer' executable is in '%s'\n", path)
}
numPlays := 0
for {
numPlays++
log.Printf(" Play number: %d\n", numPlays)
cmd := exec.Command("omxplayer", soundFile)
var stdoutBuf, stderrBuf bytes.Buffer
stdoutIn, _ := cmd.StdoutPipe()
stderrIn, _ := cmd.StderrPipe()
var errStdout, errStderr error
stdout := io.MultiWriter(os.Stdout, &stdoutBuf)
stderr := io.MultiWriter(os.Stderr, &stderrBuf)
err := cmd.Start()
if err != nil {
log.Fatalf("fatal: cmd.Start() for 'play' failed with '%s'\n", err)
}
var wg sync.WaitGroup
wg.Add(1)
go func() {
_, errStdout = io.Copy(stdout, stdoutIn)
wg.Done()
}()
_, errStderr = io.Copy(stderr, stderrIn)
wg.Wait()
err = cmd.Wait()
if err != nil {
log.Fatalf("fatal: cmd.Run() for 'play' failed with %s\n", err)
}
if errStdout != nil || errStderr != nil {
log.Fatal("fatal: failed to capture stdout or stderr\n")
}
outStr, errStr := string(stdoutBuf.Bytes()), string(stderrBuf.Bytes())
log.Printf("\nout:\n%s\nerr:\n%s\n____________________________________________________\n\n", outStr, errStr)
}
}