Skip decryption in case of cbcs without subsamples

[jacek-manko-red]

YT EME testcases: AC3AudioCbcs and EAC3AudioCbcs are failing because ocdm is trying to decrypt samples which are actually clear, unencrypted. Skip decryption for those cases

[calvaris]

I am taking over this, as I had some cbcs issues pending and I want to study this in depth.

[calvaris]

You need to elaborate more because I am running those tests on the RPi (after enabling the AV ac3 codec) and I am not getting the protection meta in the buffer, which means that the transformation function bails out very early at

    GstProtectionMeta* protectionMeta = reinterpret_cast<GstProtectionMeta*>(gst_buffer_get_protection_meta(buffer));
    if (!protectionMeta) {
        GST_TRACE_OBJECT(self, "Buffer %p does not contain protection meta, not decrypting", buffer);
        return GST_FLOW_OK;
    }

[jacek-manko-red]

Interesting - I am getting GstProtectionMeta in the buffers. Must be a difference in qtdemux then. Which version of gstreamer are you using on RPi?

[jacek-manko-red]

It's probably because we're missing this: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/5114fb41700b236d645838922d3e166791be464c

[calvaris]

It's probably because we're missing this: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/5114fb41700b236d645838922d3e166791be464c

Yes, it is most likely that. I'm closing this. Please reply if the problem persists.