Player not parsing Clearkey license acquisition url.

[sr1990]

ExoPlayer Version

2.17.1

Devices that reproduce the issue

Pixel 5

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

Added

      {
        "name": "CLEARKEY (cenc)",
        "uri": "https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest_1080p_ClearKey.mpd",
        "drm_scheme": "clearkey"
      },

to media.exolist.json.

Works if I specify the drm license uri

      {
        "name": "CLEARKEY (cenc)",
        "uri": "https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest_1080p_ClearKey.mpd",
        "drm_scheme": "clearkey",
        "drm_license_uri": "https://drm-clearkey-testvectors.axtest.net/AcquireLicense"
      },

Expected result

The media plays successfully.

Actual result

Playback crashes with the following error:
E/EventLogger: playerFailed [eventTime=4.38, mediaPos=0.00, window=0, period=0, errorCode=ERROR_CODE_DRM_LICENSE_ACQUISITION_FAILED

One workaround is
in DashManifestParser.java

1. in parseContentProtection(),

• add the case to parse clearkey

case "urn:uuid:e2719d58-a985-b3c9-781a-b030af78d30e":
          uuid = C.CLEARKEY_UUID;
          schemeType = "clearkey";
          break;

• Parse the clearkey url in the same method

if (XmlPullParserUtil.isStartTag(xpp, "clearkey:Laurl")) {
        if (xpp.next() == XmlPullParser.TEXT) {
          licenseServerUrl = xpp.getText();
        }
 } 

2. In parseAdaptationSet(), after line 416 while parsing the Content Protection, add

     } else if (XmlPullParserUtil.isStartTag(xpp, "ContentProtection")) {
        Pair<String, SchemeData> contentProtection = parseContentProtection(xpp);
        if (contentProtection.first != null) {
          drmSchemeType = contentProtection.first;
        }
        if (contentProtection.second != null) {
          if (drmSchemeType != null && drmSchemeType == "clearkey") {
            // update the license url of cenc
            for (int i = 0;i<drmSchemeDatas.size();i++) {
              if (drmSchemeDatas.get(i).uuid == C.COMMON_PSSH_UUID &&
                  drmSchemeDatas.get(i).licenseServerUrl == null)
                drmSchemeDatas.get(i).licenseServerUrl = contentProtection.second.licenseServerUrl;
            }
          }
          drmSchemeDatas.add(contentProtection.second);
        }

Please let me know what you think OR if I am missing anything.
Thanks.

Media

https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest_1080p_ClearKey.mpd

Bug Report

• You will email the zip file produced by adb bugreport to dev.exoplayer@gmail.com after filing this issue.

[tonihei]

I think the content is configured as expected (see #3138 (comment) as a verification that both ContentProtection tags are expected, and Dash-Industry-Forum/dash.js#3343 for another example where parsing the license url is requested).

And the proposed solution also looks sensible to me. Would you be willing to send a PR with the suggested changes?

I'll mark the issue as an enhancement in the meantime (because it's not a bug, more a new feature to detect Clearkey LicenseURLs).

[tonihei]

This is now supported after merging a modified version of #10260.

[sr1990]

Thanks @tonihei !