Filter AdaptationSets with unsupported codecs

Created by: dsilhavy

Environment

• Link to playable MPD file:
• Dash.js version: 3.2.0
• Browser name/version: all
• OS name/version: all

Steps to reproduce

1. Try to play an MPD that contains AdaptationSets with an unsupported codec, for instance audio ec-3

Observed behavior

dash.js will not filter the complete AdaptationSet and tries to create a SourceBuffer for an unsupported codec

Console output

[6303][BufferController][audio] Caught error on create SourceBuffer: NotSupportedError: Failed to execute 'addSourceBuffer' on 'MediaSource': The type provided ('audio/mp4;codecs="ec-3"') is unsupported.

Expected behavior

dash.js should filter unsupported AdaptationSets prior to creating the SourceBuffer. Currently filtering is only done on Representation level

    function filterCodecs(type) {
        const realAdaptation = adapter.getAdaptationForType(streamInfo ? streamInfo.index : null, type, streamInfo);

        if (!realAdaptation || !Array.isArray(realAdaptation.Representation_asArray)) return;

        // Filter codecs that are not supported
        realAdaptation.Representation_asArray = realAdaptation.Representation_asArray.filter((_, i) => {
            // keep at least codec from lowest representation
            if (i === 0) return true;

            const codec = adapter.getCodec(realAdaptation, i, true);
            if (!capabilities.supportsCodec(codec)) {
                logger.error('[Stream] codec not supported: ' + codec);
                return false;
            }
            return true;
        });
    }