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Apr 29, 2025
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Update nf-mfmediaengine-imfextendeddrmtypesupport-istypesupportedex.md #2007

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2 changes: 1 addition & 1 deletion ...t/mfmediaengine/nf-mfmediaengine-imfextendeddrmtypesupport-istypesupportedex.md
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Expand Up @@ -117,7 +117,7 @@ The following table lists the supported individual feature queries, organized by
|3 |Display 2<sup>*</sup>|hdr |1 (supported) |Does the target support High Dynamic Range (HDR) rendering |Y |
|4 |Output Protection|hdcp |0 (off), 1 (on without HDCP 2.2 Type 1 restriction), 2 (on with HDCP 2.2 Type 1 restriction |Do all intersecting enabled displays support at least the request protection level? |Y |
|5 |General: Efficiency<sup>**</sup>|efficiency-setting |0 (off = no restriction), 1 (on = limit resolution when on battery power) |Does the user want battery life, streaming overhead, and/or download speed in preference to highest resolution?<sup>****</sup> |Y |
|6a |Decryption|encryption-type |“cenc” or “cbcs”, with optional "-clearlead" suffix. |Is this encryption type supported for decryption with the specified codec / key-system? If value is unspecified, default value of "cenc" is used. Starting with Windows Build 22621, the suffix "-clearlead" is supported. When "-clearlead" is appended to the encryption type value, support for using clear content at the very beginning of encrypted content is also requested. Clear content at the beginning of the content speeds up the time to presenting the first frame. If "-clearlead" is added to the encryption-type, the version number of the requested codec will be checked. The AV1 and VP9 codecs will be checked for major version 2, and HEVC will be checked for v2.0.53421 or greater. |N |
|6a |Decryption|encryption-type |“cenc” or “cbcs”, with optional "-clearlead" suffix. |Is this encryption type supported for decryption with the specified codec / key-system? If value is unspecified, default value of "cenc" is used. Starting with Windows 11 Build 22621 and Windows 10 Build 19045.5796 or later, the suffix "-clearlead" is supported. When "-clearlead" is appended to the encryption type value, support for using clear content at the very beginning of encrypted content is also requested. Clear content at the beginning of the content speeds up the time to presenting the first frame. If "-clearlead" is added to the encryption-type, the version number of the requested codec will be checked. The AV1 and VP9 codecs will be checked for major version 2, and HEVC will be checked for v2.0.53421 or greater. |N |
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@riverar riverar Apr 29, 2025

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If this is verified to be true, we should probably flip the versioning to read more naturally here:

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|6a |Decryption|encryption-type |“cenc” or “cbcs”, with optional "-clearlead" suffix. |Is this encryption type supported for decryption with the specified codec / key-system? If value is unspecified, default value of "cenc" is used. Starting with Windows 11 Build 22621 and Windows 10 Build 19045.5796 or later, the suffix "-clearlead" is supported. When "-clearlead" is appended to the encryption type value, support for using clear content at the very beginning of encrypted content is also requested. Clear content at the beginning of the content speeds up the time to presenting the first frame. If "-clearlead" is added to the encryption-type, the version number of the requested codec will be checked. The AV1 and VP9 codecs will be checked for major version 2, and HEVC will be checked for v2.0.53421 or greater. |N |
|6a |Decryption|encryption-type |“cenc” or “cbcs”, with optional "-clearlead" suffix. |Is this encryption type supported for decryption with the specified codec / key-system? If value is unspecified, default value of "cenc" is used. The "-clearlead" suffix is supported in Windows 10 (build 19045.5796 or later) and in Windows 11 (build 22621 or later). When "-clearlead" is appended to the encryption type value, support for using clear content at the very beginning of encrypted content is also requested. Clear content at the beginning of the content speeds up the time to presenting the first frame. If "-clearlead" is added to the encryption-type, the version number of the requested codec will be checked. The AV1 and VP9 codecs will be checked for major version 2, and HEVC will be checked for v2.0.53421 or greater. |N |

|6b |Decryption|encryption-iv-size |8 or 16 |Is this Initialization Vector (IV) size (in bytes) supported for decryption with the specified codec / key-system? If value is unspecified, default value of 8 is used. |N |

<sup>*</sup> Only supported on Windows 10, version 1607 and newer OS versions
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