mpg123hack

hacking at mpg123

gcc -std=gnu99 *.c -lcurl -lao -lmpg123

./a.out file

or

./a.out http://stream

alex@raspberrypi:~/mpg123hack $ LOG_LEVEL=DEBUG WEB_ROOT=/home/alex/mpg123hack/resources/web/ sudo -E ./my123 /media/nugget_share/music/alex-beet/ streams playlists /home/alex/id3_cache

dependencies: libao-dev libmpg123-dev libssl-dev libmicrohttpd git version 4adf1c6d1744e1ac4cb0c88817a3726c3038b919 libwiringPi (see http://wiringpi.com/download-and-install/) libasound2-dev

libao-dev libmpg123-dev libjson-c-dev libmicrohttpd-dev libttspico-dev

todo: remove wiringPi as a dependency; just read/write to the memory addresses instead maybe? or find a different lib that's more lightweight and doesn't shell out to setup pins

config settings:

set audio to analog out

sudo amixer cset numid=3 2

set volume to 100%

sudo amixer cset numid=1 0

Notes about amixer, one can call sudo amixer cget numid=<any ID here> to get a description and current value of audio settings

watch -n 0.2 '(git status | grep modified) && gitfixupandpush'

libmicrohttpd: wget ftp://ftp.gnu.org/gnu/libmicrohttpd/libmicrohttpd-0.9.52.tar.gz tar xzf libmicrohttpd-0.9.52.tar.gz cd libmicrohttpd-0.9.52 ./configure make make install

HTTP_PORT=8080 WEB_ROOT=./resources/web/ ./my123 '/home/alex/Downloads/alex/Soulseek Downloads/complete' streams foo

To load a new playlist

POST /playlists/load {name: "foo", playlist: ["path/a", "path/b", ...]

To play a playlist

curl -s -XPOST 'raspberrypi.local/playlists?name=foo&track=0'

libao reads from /etc/libao.conf

configured to use alsa

list all drivers

sudo aplay -l

raspberrypi uses alsa; desktop uses pulse

alex@raspberrypi:~ $ sudo amixer Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback 400 [100%] [4.00dB] [on]

next time it locks up, see if aplay still works:

sudo aplay Left-Right\ Channel\ Audio\ Test.mp3

notes from 2019-jan sudo amixer cset numid=3 1

setting up on a new pi:

sudo dd bs=4M if=/home/alex/Downloads/2018-11-13-raspbian-stretch-lite.img of=/dev/mmcblk0 conv=fsync

Then remove, and re-insert SD card, to have ubuntu auto-mount it.

configure the wifi

create /media/alex/boot/wpa_supplicant.conf with: ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev network={ ssid="YOUR_NETWORK_NAME" psk="YOUR_PASSWORD" key_mgmt=WPA-PSK }

enable ssh by default by creating an empty file:

touch /media/alex/boot/ssh

setup a static IP

edit /media/alex/rootfs/etc/dhcpcd.conf, and include:

interface wlan0 static ip_address=192.168.0.11/24 static routers=192.168.0.1 static domain_name_servers=8.8.8.8

sync and unmount

sudo sync sudo umount /media/alex/rootfs sudo umount /media/alex/boot

connect via ssh using user: pi, password: raspberry

ssh pi@192.168.0.11

create a user:

sudo -i useradd alex mkdir /home/alex chown alex:alex /home/alex/ usermod -s /bin/bash alex echo 'alex ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers passwd alex

#logout ssh-copy-id alex@192.168.0.11 scp .ssh/id_rsa* 192.168.0.11:.ssh/.

ssh 192.168.0.11 echo $UID # and make note that it is 1000 (or update the below fstab command)

setup nas

mkdir -p /media/nugget_share/music echo '//192.168.0.3/music /media/nugget_share/music cifs uid=1000,username=alex,password=mypasswordgoeshere,iocharset=utf8,ro,nounix,file_mode=0777,dir_mode=0777 0 0' >> /etc/fstab mount -a

install tools

apt update apt upgrade apt install git wiringpi libasound2-dev libmpg123-dev libjson-c-dev libssl-dev

apt install libttspico-dev

or if it's not available and you're on a raspberry pi v1 try:

wget http://archive.raspberrypi.org/debian/pool/main/s/svox/libttspico-dev_1.0+git20130326-3+rpi1_armhf.deb wget http://archive.raspberrypi.org/debian/pool/main/s/svox/libttspico-data_1.0+git20130326-3+rpi1_all.deb wget http://archive.raspberrypi.org/debian/pool/main/s/svox/libttspico0_1.0+git20130326-3+rpi1_armhf.deb dpkg -i libttspico*.deb

install special version of libmicrohttpd

( the libmicrohttpd-dev version has MHD_create_response_for_upgrade wrapped by an #if 0 guard )

libmicrohttpd: wget ftp://ftp.gnu.org/gnu/libmicrohttpd/libmicrohttpd-0.9.63.tar.gz tar xzf libmicrohttpd-0.9.63.tar.gz cd libmicrohttpd-0.9.63 ./configure make make install ldconfig

cd git clone git@github.com:alexcb/music-player.git cd music-player make sudo cp init.d-music /etc/init.d/music

cd touch streams

scp 192.168.0.10:id3_cache 192.168.0.11:id3_cache

ubuntu music-ui launcher

cp music-ui.desktop ~/.local/share/applications/.