[enh] Adds dockers

Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.8-slim
+LABEL name=redilysis version=0.1
+
+WORKDIR /opt
+RUN apt update
+RUN apt install -y --no-install-recommends build-essential\
+ gcc\
+ pkg-config\
+ python-dev\
+ portaudio19-dev\
+ libsndfile1\
+ alsa-utils\
+ pulseaudio
+RUN pip3 install librosa numpy pyaudio redis statistics
+
+COPY . .
+
+# Start the main process.
+CMD ["python", "./redilysis.py", "-L"]

README.md

@@ -5,6 +5,45 @@ Redilysis sends audio analysis to a redis server.
 
 The idea is to share a single audio analysis to many Visual Jockey filters, in our case for lasers.
 
+### Requirements and installation
+
+You need:
+* python 2.7 / 3+
+* an audio card
+* a redis server
+
+#### Custom install on Linux
+
+Note that it will almost certainly fail on Debian 9/10/11. This is due to mandatory LLVM's version when compiling the numba library for librosa.
+
+```
+apt install -y --no-install-recommends build-essential gcc pkg-config python-dev portaudio19-dev libsndfile1 pulseaudio
+pip3 install librosa numpy pyaudio redis statistics
+git clone https://git.interhacker.space/tmplab/redilysis.git
+cd redilysis
+python redilysis.py --help
+```
+You will need to have pulseaudio and a local redis server.
+
+#### With Docker
+
+Here is an example. It is a dirty method, but it works :)
+
+```
+docker run -it \
+  -e NUMBA_CACHE_DIR=/tmp  \
+  -e PULSE_SERVER=unix:${XDG_RUNTIME_DIR}/pulse/native \
+  -v ${XDG_RUNTIME_DIR}/pulse/native:${XDG_RUNTIME_DIR}/pulse/native \
+  -v ~/.config/pulse/cookie:/root/.config/pulse/cookie \
+  --group-add $(getent group audio | cut -d: -f3) \
+  protonphoton/redilysis:latest \
+  python redilysis.py -i 172.17.0.1
+```
+
+Two things here:
+
+1. We are using here the `172.17.0.1` IP address to connect to the redis server. Change according to your needs.
+2. The dirty part: Docker uses pulseaudio through your personal user and environment variables...
 
 
 ### Redis Keys and Contents for end users
@@ -136,21 +175,6 @@ Examples are given based on previous values for redis keys.
     * etc. until you have ```f(i) > bpm_sample_interval```
 
 
-### Requirements and installation
-
-* python 2.7
-* audio card
-* redis server
-
-To be honest, in my experience installation on Debian 9,10,11 is a mess, due to mandatory LLVM's version when compiling the numba library for librosa.
-
-```python
-sudo apt install python-pyaudio python
-git clone https://git.interhacker.space/tmplab/redilysis.git
-cd redilysis
-pip install -r requirements.txt
-python redilysis.py --help
-```
 
 
 ### Running redilysis: Common parameters
@@ -233,4 +257,7 @@ It attempts to detect beats based on audio "jumps" in intensity and energy.
 To correct a well-known error called the "octave error" where the detected tempo is twice/half or thrice/third of the real tempo, you can use the Min/Max BPM. When the calculated tempo is outside of the range, it will attempt to find more legitimate values.
 
 
+# License
+
+Released under the GPLv3 License
 

redilysis.py

@@ -1,3 +1,4 @@
+#! /usr/bin/python2.7
 """
 Sends live audio analysis to the terminal.
 
@@ -227,9 +228,9 @@ def m_spectrum(audio_data):
     #debug( 'spectrum_120:{} '.format(spectrum_120))
     #debug( 'spectrum_10:{}'.format(spectrum_10))
     #debug( 'rms:{}'.format(rms_avg))
-    r.set( 'spectrum_120', json.dumps( spectrum_120 ) )
+    if len(spectrum_120): r.set( 'spectrum_120', json.dumps( spectrum_120 ) )
-    r.set( 'spectrum_10', json.dumps( spectrum_10 ) )
+    if len(spectrum_10): r.set( 'spectrum_10', json.dumps( spectrum_10 ) )
-    r.set( 'rms', "{}".format(rms_avg) )
+    if rms : r.set( 'rms', "{}".format(rms_avg) )
     return True
 
 

requirements.txt

@@ -1,3 +1,5 @@
-librosa==0.7.2
+librosa
+numpy
+pyaudio
 redis
 statistics