Am I misunderstanding (multiple) script loading?

[floholl]

Hi all,

I am trying (Liquidsoap v2.25 under macOS installed via opam) to separate my signal chain by loading separate scripts, as described here, with the intention of easily exchanging sources, outputs, etc. in an educational context.

The following plays the expected sine wave:

$ cat sine_portaudio.liq
src = sine()
output.portaudio(src)
$ liquidsoap sine_portaudio.liq

However, if I split the two lines from the previous .liq script into two separate scripts and load both, I get an error:

$ cat sine.liq
src = sine()
$ cat portaudio.liq
output.portaudio(src)
$ liquidsoap sine.liq portaudio.liq
Unknown position:

Error -1: Exception raised: File "src/core/stream/frame_settings.ml", line 123, characters 6-12: Assertion failed
Raised at Frame_settings.delayed_conf.(fun) in file "src/core/stream/frame_settings.ml", line 123, characters 6-30
Called from CamlinternalLazy.do_force_block in file "camlinternalLazy.ml", line 49, characters 17-27
Re-raised at CamlinternalLazy.do_force_block in file "camlinternalLazy.ml", line 56, characters 4-11
Called from CamlinternalLazy.force_lazy_block in file "camlinternalLazy.ml" (inlined), line 78, characters 27-67
Called from Audio_gen.sine in file "src/core/sources/audio_gen.ml", line 92, characters 35-64
Called from Audio_gen.gen in file "src/core/sources/audio_gen.ml", line 36, characters 10-21
Called from Lang_source.add_operator.f in file "src/core/lang_source.ml", line 438, characters 39-44
Called from Liquidsoap_lang__Evaluation.apply.f in file "src/lang/evaluation.ml", line 174, characters 8-12
Called from Liquidsoap_lang__Evaluation.eval_term in file "src/lang/evaluation.ml", line 347, characters 10-43
Called from Liquidsoap_lang__Evaluation.eval in file "src/lang/evaluation.ml" (inlined), line 359, characters 10-38
Called from Liquidsoap_lang__Evaluation.eval in file "src/lang/evaluation.ml", line 375, characters 2-25
Called from Liquidsoap_lang__Evaluation.eval_toplevel in file "src/lang/evaluation.ml", line 494, characters 38-46
Called from Liquidsoap_lang__Startup.time in file "src/lang/startup.ml", line 30, characters 12-16
Called from Stdlib__Fun.protect in file "fun.ml", line 34, characters 8-15
Re-raised at Stdlib__Fun.protect in file "fun.ml", line 39, characters 6-52
Called from Liquidsoap_lang__Runtime.type_and_run in file "src/lang/runtime.ml", lines 30-41, characters 4-77
Called from Liquidsoap_lang__Runtime.report in file "src/lang/runtime.ml", line 215, characters 12-23

Any ideas? Am I misunderstanding how script loading is supposed to work?

Many thanks for any help you can provide,
Florian

[gAlleb]

Hi @floholl, yeah, you are understanding it right.

I don't have 2.2.5 at hand. But I got 2.3.0 on Mac installed via opam and it works just fine:

% cat sine.liq
src = sine()
% cat portaudio.liq
output.portaudio(src)
% liquidsoap sine.liq portaudio.liq
2024/12/10 23:34:31 >>> LOG START
2024/12/10 23:34:26 [ffmpeg.filter.bitstream:3] No valid mode found for filter pgs_frame_merge!
2024/12/10 23:34:26 [main:3] Liquidsoap rolling-release-v2.3.x-2-gb18d14a+dev
...
...

So I think it may be a bug or something in 2.2.5 version. I encourage you to upgrade to the latest 2.3.0 version.

[floholl]

Thanks @gAlleb, much appreciated - I can confirm that this is working for me, too, under macOS with Liquidsoap v2.3.0, so it does indeed seem to be a bug in v2.2.5, which I already reported as #4255.

Here is what I did: I explicitly upgraded Liquidsoap to v2.3.0 via

$ opam upgrade liquidsoap

which required an ocaml downgrade (from 5.2.1 to 4.14.2). After that, the same command that had failed before now played a sine wave with the same scripts:

$ liquidsoap src_sine.liq out_portaudio.liq
2024/12/10 21:51:57 >>> LOG START
2024/12/10 21:51:57 [main:3] Liquidsoap 2.3.0+dev
...