bw/bundles/voctocore: add loudness-rendering script

bundlewrap/bundles/voctocore/files/loudness-rendering.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+[[ -n "$DEBUG" ]] && set -x
+
+set -uo pipefail
+
+mkdir -p "/opt/loudness-rendering/data/"
+touch "/opt/loudness-rendering/data/line1.txt"
+touch "/opt/loudness-rendering/data/line2.txt"
+touch "/opt/loudness-rendering/data/line3.txt"
+
+<%
+    width_per_scope = int(1024/len(node.metadata.get('voctocore/audio')))
+    label_padding_left = int(45*(width_per_scope/640))
+%>\
+
+ffmpeg \
+    -hide_banner \
+    -xerror \
+    -y \
+    -i "tcp://127.0.0.1:15100" \
+    -filter_complex "
+        color=size=1024x1056:color=black [base];
+        [0:v] fps=30 [streamvideo];
+% for idx, audio_name in enumerate(sorted(node.metadata.get('voctocore/audio').keys())):
+        [0:a:0] pan=stereo|c0=c${idx*2}|c1=c${idx*2+1},asplit [audioin_${audio_name}_ebur][audioin_${audio_name}_vec];
+        [audioin_${audio_name}_ebur] ebur128=video=1:meter=16:target=-16:size=640x480 [ebur_${audio_name}][a_${audio_name}];
+        [audioin_${audio_name}_vec] avectorscope=size=640x480:zoom=2:r=30[vec_${audio_name}];
+        [ebur_${audio_name}][vec_${audio_name}] blend=all_mode='addition':all_opacity=0.8 [scope_${audio_name}];
+        [scope_${audio_name}] scale=${width_per_scope}:480, fps=30 [scope_scaled_${audio_name}];
+        [a_${audio_name}] anullsink;
+% endfor
+        [0:a:0] aformat=sample_fmts=fltp:sample_rates=48000:channel_layouts=stereo [audio];
+        [base][streamvideo] overlay=shortest=1:y=480 [tmp0];
+% for idx, audio_name in enumerate(sorted(node.metadata.get('voctocore/audio').keys())):
+        [tmp${idx}][scope_scaled_${audio_name}] overlay=shortest=1:x=${idx*width_per_scope} [temp_${audio_name}];
+        [temp_${audio_name}] drawtext='fontcolor=white:x=${idx*width_per_scope+label_padding_left}:y=136:fontsize=20:fontfile=/usr/share/fonts/freesans.ttf:text=${audio_name}' [tmp${idx+1}];
+% endfor
+        [tmp${idx+1}] drawtext='fontcolor=white:x=${label_padding_left}:y=46:fontsize=50:fontfile=/usr/share/fonts/freesans.ttf:textfile=/opt/loudness-rendering/data/line1.txt:reload=30' [ov1];
+        [ov1] drawtext='fontcolor=white:x=${label_padding_left}:y=106:fontsize=20:fontfile=/usr/share/fonts/freesans.ttf:textfile=/opt/loudness-rendering/data/line2.txt:reload=30' [ov2];
+        [ov2] drawtext='fontcolor=white:x=${label_padding_left}:y=417:fontsize=50:fontfile=/usr/share/fonts/freesans.ttf:textfile=/opt/loudness-rendering/data/line3.txt:reload=30' [ov3];
+        [ov3] drawtext='fontcolor=white:x=${label_padding_left}:y=387:fontsize=20:text=${node.name}' [out]" \
+    -map "[out]" -c:v libx264 -threads 2 -preset veryfast -x264-params keyint=30 -tune zerolatency -crf:0 26 -profile:0 high -level:0 4.1 -strict -2 -pix_fmt yuv420p \
+    -map "[audio]" -c:a aac -b:a 128k \
+    -f flv \
+    "rtmp://ingest2.c3voc.de/relay/${node.name}_loudness"

bundlewrap/bundles/voctocore/items.py

@@ -174,7 +174,7 @@
     'running': None, # get's auto-started by svc_systemd:voctomix2-voctocore
 }
 
-## streaming-sink
+## playout
 for pname, pdevice in node.metadata.get('voctocore/playout', {}).items():
     if pname not in PLAYOUT_PORTS:
         raise BundleError(f'{node.name} wants to use voctocore playout for {pname}, which does not exist. Valid choices: {",".join(sorted(PLAYOUT_PORTS))}')
@@ -227,3 +227,9 @@
             'directory:/usr/local/lib/systemd/system',
         },
     }
+
+# loudness-rendering
+files['/opt/voctomix2/scripts/loudness-rendering.sh'] = {
+    'content_type': 'mako',
+    'mode': '0755',
+}