Help needed: TypeError: GLctx is undefined

[Mehdi Sabwat]

Hi !

Looking at this stack trace :

worker.js onmessage() captured an uncaught exception: TypeError: GLctx is undefined test.worker.js:204:13

   onmessage http://localhost:6931/test.worker.js:204

_glGetString@http://localhost:6931/test.js:12881:22
glGetString@http://localhost:6931/test.wasm:wasm-function[39]:0x0
vout_display_opengl_New@http://localhost:6931/test.wasm:wasm-function[2745]:0xfb135
Open.42@http://localhost:6931/test.wasm:wasm-function[2757]:0xfde90
vout_display_start@http://localhost:6931/test.wasm:wasm-function[5234]:0x234192
vlc_module_load@http://localhost:6931/test.wasm:wasm-function[4495]:0x1ed60b
vout_display_New@http://localhost:6931/test.wasm:wasm-function[5233]:0x23408f
vout_OpenWrapper@http://localhost:6931/test.wasm:wasm-function[5414]:0x24047b
vout_Request@http://localhost:6931/test.wasm:wasm-function[5314]:0x238275
input_resource_GetVout@http://localhost:6931/test.wasm:wasm-function[5065]:0x22b3e2
vout_update_format@http://localhost:6931/test.wasm:wasm-function[4781]:0x20f622
decoder_UpdateVideoFormat@http://localhost:6931/test.wasm:wasm-function[4801]:0x2109b7
lavc_UpdateVideoFormat@http://localhost:6931/test.wasm:wasm-function[2077]:0x9c3ef
lavc_GetFrame@http://localhost:6931/test.wasm:wasm-function[2070]:0x9b000
ff_get_buffer@http://localhost:6931/test.wasm:wasm-function[5952]:0x25bdf3
ff_thread_get_buffer@http://localhost:6931/test.wasm:wasm-function[7741]:0x3ed9b4
h264_frame_start@http://localhost:6931/test.wasm:wasm-function[6058]:0x2b144b
ff_h264_queue_decode_slice@http://localhost:6931/test.wasm:wasm-function[6054]:0x2aed5a
h264_decode_frame@http://localhost:6931/test.wasm:wasm-function[6074]:0x2b5919
decode_receive_frame_internal@http://localhost:6931/test.wasm:wasm-function[5943]:0x2596e4
avcodec_send_packet@http://localhost:6931/test.wasm:wasm-function[5942]:0x2595a8
DecodeBlock.1@http://localhost:6931/test.wasm:wasm-function[2079]:0x9c843
DecodeVideo@http://localhost:6931/test.wasm:wasm-function[2075]:0x9bee1
DecoderProcess@http://localhost:6931/test.wasm:wasm-function[4780]:0x20eef6
DecoderThread@http://localhost:6931/test.wasm:wasm-function[4756]:0x20dd3e
dynCall_ii@http://localhost:6931/test.wasm:wasm-function[10304]:0x44f797
Module.dynCall_ii@http://localhost:6931/test.js:15580:38
this.onmessage@http://localhost:6931/test.worker.js:165:29
 test.worker.js:205:13

Pthread 26767184 uncaught exception in http://localhost:6931/test.js:12881:0: TypeError: GLctx is undefined. Error object: test.worker.js:49:11

TypeError: GLctx is undefined test.worker.js:50:11

pthread sent an error! http://localhost:6931/test.js:12881: TypeError: GLctx is undefined test.html:1246:19

TypeError: GLctx is undefined test.js:12881:22

   _glGetString http://localhost:6931/test.js:12881

    glGetString http://localhost:6931/test.wasm:0

    vout_display_opengl_New http://localhost:6931/test.wasm:1028405

    42 http://localhost:6931/test.wasm:1040016

    vout_display_start http://localhost:6931/test.wasm:2310546

    vlc_module_load http://localhost:6931/test.wasm:2020875

    vout_display_New http://localhost:6931/test.wasm:2310287

    vout_OpenWrapper http://localhost:6931/test.wasm:2360443

    vout_Request http://localhost:6931/test.wasm:2327157

    input_resource_GetVout http://localhost:6931/test.wasm:2274274

    vout_update_format http://localhost:6931/test.wasm:2160162

    decoder_UpdateVideoFormat http://localhost:6931/test.wasm:2165175

    lavc_UpdateVideoFormat http://localhost:6931/test.wasm:639983

    lavc_GetFrame http://localhost:6931/test.wasm:634880

    ff_get_buffer http://localhost:6931/test.wasm:2473459

    ff_thread_get_buffer http://localhost:6931/test.wasm:4118964

    h264_frame_start http://localhost:6931/test.wasm:2823243

    ff_h264_queue_decode_slice http://localhost:6931/test.wasm:2813274

    h264_decode_frame http://localhost:6931/test.wasm:2840857

    decode_receive_frame_internal http://localhost:6931/test.wasm:2463460

    avcodec_send_packet http://localhost:6931/test.wasm:2463144

    1 http://localhost:6931/test.wasm:641091

    DecodeVideo http://localhost:6931/test.wasm:638689

    DecoderProcess http://localhost:6931/test.wasm:2158326

    DecoderThread http://localhost:6931/test.wasm:2153790

    dynCall_ii http://localhost:6931/test.wasm:4519831

    dynCall_ii http://localhost:6931/test.js:15580

    onmessage

I was wondering if it was normal that a function would get address 0. Could this be a bug in code generation?

glGetString@http://localhost:6931/test.wasm:wasm-function[39]:0x0

I know I am not giving much information on the context (sorry about that), but I haven't been able to isolate so far.

I found an issue that has the same symptoms and the recommendation was to look into js glue code, do you think it's a the right thing to do in my case?

GLctx is defined in test.js, but it seems it is not in the scope the function is called?

Thanks in advance for your help,

Regards,

Mehdi

[Mehdi Sabwat]

I think you kinda did already, but if you didn't please ignore me ! :) I inverted an assert and figured out I didn't have a glcontext :D so no surprise there.

Thought I noticed that Chromium gave different messages than the ones in the stack trace below. Maybe an issue with the profiler? But anyway, moving on ! :)