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Use HEVC by default if the decoder supports FEATURE_LowLatency or the media performance class is 12+

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This commit is contained in:
Cameron Gutman 2022-10-31 01:05:01 -05:00
parent a96e508ffb
commit 0ddd8df272
2 changed files with 26 additions and 4 deletions
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2
app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
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@ -198,7 +198,7 @@ public class MediaCodecDecoderRenderer extends VideoDecoderRenderer implements C
// for even required levels of HEVC. // for even required levels of HEVC.
MediaCodecInfo hevcDecoderInfo = MediaCodecHelper.findProbableSafeDecoder("video/hevc", -1); MediaCodecInfo hevcDecoderInfo = MediaCodecHelper.findProbableSafeDecoder("video/hevc", -1);
if (hevcDecoderInfo != null) { if (hevcDecoderInfo != null) {
if (!MediaCodecHelper.decoderIsWhitelistedForHevc(hevcDecoderInfo.getName())) { if (!MediaCodecHelper.decoderIsWhitelistedForHevc(hevcDecoderInfo)) {
LimeLog.info("Found HEVC decoder, but it's not whitelisted - "+hevcDecoderInfo.getName()); LimeLog.info("Found HEVC decoder, but it's not whitelisted - "+hevcDecoderInfo.getName());
// Force HEVC enabled if the user asked for it // Force HEVC enabled if the user asked for it

28
app/src/main/java/com/limelight/binding/video/MediaCodecHelper.java
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@ -665,7 +665,7 @@ public class MediaCodecHelper {
return isDecoderInList(refFrameInvalidationHevcPrefixes, decoderInfo.getName()); return isDecoderInList(refFrameInvalidationHevcPrefixes, decoderInfo.getName());
} }
public static boolean decoderIsWhitelistedForHevc(String decoderName) { public static boolean decoderIsWhitelistedForHevc(MediaCodecInfo decoderInfo) {
// Google didn't have official support for HEVC (or more importantly, a CTS test) until // Google didn't have official support for HEVC (or more importantly, a CTS test) until
// Lollipop. I've seen some MediaTek devices on 4.4 crash when attempting to use HEVC, // Lollipop. I've seen some MediaTek devices on 4.4 crash when attempting to use HEVC,
// so I'm restricting HEVC usage to Lollipop and higher. // so I'm restricting HEVC usage to Lollipop and higher.
@ -679,11 +679,33 @@ public class MediaCodecHelper {
// OMX.qcom.video.decoder.hevcswvdec // OMX.qcom.video.decoder.hevcswvdec
// OMX.SEC.hevc.sw.dec // OMX.SEC.hevc.sw.dec
// //
if (decoderName.contains("sw")) { if (decoderInfo.getName().contains("sw")) {
LimeLog.info("Disallowing HEVC on software decoder: " + decoderInfo.getName());
return false;
}
else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && (!decoderInfo.isHardwareAccelerated() || decoderInfo.isSoftwareOnly())) {
LimeLog.info("Disallowing HEVC on software decoder: " + decoderInfo.getName());
return false; return false;
} }
return isDecoderInList(whitelistedHevcDecoders, decoderName); // If this device is media performance class 12 or higher, we will assume any hardware
// HEVC decoder present is fast and modern enough for streaming.
//
// [5.3/H-1-1] MUST NOT drop more than 2 frames in 10 seconds (i.e less than 0.333 percent frame drop) for a 1080p 60 fps video session under load.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R && Build.VERSION.MEDIA_PERFORMANCE_CLASS >= Build.VERSION_CODES.S) {
LimeLog.info("Allowing HEVC based on media performance class: " + Build.VERSION.MEDIA_PERFORMANCE_CLASS);
return true;
}
// If the decoder supports FEATURE_LowLatency, we will assume it is fast and modern enough
// to be preferable for streaming over H.264 decoders.
if (decoderSupportsAndroidRLowLatency(decoderInfo, "video/hevc")) {
LimeLog.info("Allowing HEVC based on FEATURE_LowLatency support");
return true;
}
// Otherwise, we use our list of known working HEVC decoders
return isDecoderInList(whitelistedHevcDecoders, decoderInfo.getName());
} }
@SuppressWarnings("deprecation") @SuppressWarnings("deprecation")