[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession #12378

jernoble · 2023-04-04T16:29:05Z

`2ef8f77`

[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession
https://bugs.webkit.org/show_bug.cgi?id=254992
rdar://107202864

Reviewed by Eric Carlson.

Clients of the prefixed WebKit EME APIs using the Fairplay "V2" protocol will use
a CDM implementation that relies upon AVStreamSession. This implementation will
break when "sampleBufferContentKeySessionSupport" is enabled, as it relies upon
platform changes only available through AVContentKeySession.

Remove the AVStreamSession-based CDM implementation and funnel all support through
the existing AVContentKeySession-based legacy CDM. At the same time, modify that
AVContentKeySession-based CDM to query the "sampleBufferContentKeySessionSupport"
setting and opt into the non-legacy AVContentKeySession path when it is enabled.

Drive-by fix: When opting into the non-legacy codepath, the
-contentKeySession:didProvideContentKeyRequest: delegate callbock becomes asynchronous.
To retain the existing synchronous behavior of the CDM, set an explicit work queue
for the delegate callbacks, and make the setting and getting of m_keyRequest thread-safe.
Add a semaphore to be used to detect when the m_keyRequest value changes.

Drive-by fix #2: Fix some unified-build included errors exposed by removing
CDMSessionAVStreamSession.h

Add LayoutTests for basic legacy EME API playback.

* LayoutTests/http/tests/media/fairplay/legacy-eme.js: Added.
(selectKeySystem):
(async startLegacyEME):
(extractContentId):
(concatInitDataIdAndCertificate):
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-error-expected.txt: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-error.html: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-hls-expected.txt: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-hls.html: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v2-expected.txt: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v2.html: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v3-expected.txt: Added.
* LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v3.html: Added.
* LayoutTests/http/tests/media/fairplay/support.js:
(uInt16ArrayToString):
(stringToUint16Array):
* Source/WTF/wtf/PlatformHave.h:
* Source/WebCore/Modules/encryptedmedia/legacy/LegacyCDM.cpp:
(WebCore::platformRegisterFactories):
* Source/WebCore/PAL/pal/cocoa/AVFoundationSoftLink.h:
* Source/WebCore/PAL/pal/cocoa/AVFoundationSoftLink.mm:
* Source/WebCore/SourcesCocoa.txt:
* Source/WebCore/WebCore.xcodeproj/project.pbxproj:
* Source/WebCore/platform/graphics/LegacyCDMSession.h:
* Source/WebCore/platform/graphics/avfoundation/CDMPrivateMediaSourceAVFObjC.mm:
(WebCore::queryDecoderAvailability):
(WebCore::CDMPrivateMediaSourceAVFObjC::createSession):
* Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.h:
* Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.mm:
(-[WebCDMSessionAVContentKeySessionDelegate contentKeySessionContentProtectionSessionIdentifierDidChange:]):
(WebCore::CDMSessionAVContentKeySession::CDMSessionAVContentKeySession):
(WebCore::CDMSessionAVContentKeySession::update):
(WebCore::CDMSessionAVContentKeySession::hasContentKeyRequest const):
(WebCore::CDMSessionAVContentKeySession::contentKeyRequest):
(WebCore::CDMSessionAVContentKeySession::didProvideContentKeyRequest):
(WebCore::CDMSessionAVContentKeySession::contentKeySession):
* Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVStreamSession.h: Removed.
* Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVStreamSession.mm: Removed.
* Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionMediaSourceAVFObjC.h:
(WebCore::toCDMSessionMediaSourceAVFObjC):
* Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaSourceAVFObjC.h:
(WebCore::MediaPlayerPrivateMediaSourceAVFObjC::hasStreamSession): Deleted.
* Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaSourceAVFObjC.mm:
(WebCore::MediaPlayerPrivateMediaSourceAVFObjC::setCDMSession):
(WebCore::MediaPlayerPrivateMediaSourceAVFObjC::streamSession): Deleted.
* Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm:
(WebCore::SourceBufferPrivateAVFObjC::didProvideMediaDataForTrackId):
(WebCore::SourceBufferPrivateAVFObjC::willProvideContentKeyRequestInitializationDataForTrackID):
(WebCore::SourceBufferPrivateAVFObjC::destroyStreamDataParser):
(WebCore::copyKeyIDs): Deleted.
* Tools/TestWebKitAPI/Tests/WebCore/cocoa/AVFoundationSoftLinkTest.mm:
(TestWebKitAPI::TEST):

Canonical link: https://commits.webkit.org/262647@main

e9f85b0

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
❌ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	❌ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	❌ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

webkit-early-warning-system · 2023-04-04T16:32:19Z

EWS run on previous version of this PR (hash 2b6c8d3)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	❌ 🛠 ios	❌ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	❌ 🛠 ios-sim	❌ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	❌ 🧪 api-mac	✅ 🛠 gtk
	❌ 🧪 api-ios	❌ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	❌ 🧪 mac-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	❌ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

webkit-early-warning-system · 2023-04-04T19:24:58Z

EWS run on previous version of this PR (hash e52af3e)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	❌ 🛠 ios	❌ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	❌ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	❌ 🧪 api-mac	✅ 🛠 gtk
	❌ 🧪 api-ios	❌ 🧪 mac-wk1	❌ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	❌ 🧪 mac-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	~~🧪 mac-AS-debug-wk2~~	✅ 🛠 jsc-armv7
	✅ 🛠 watch	❌ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

eric-carlson · 2023-04-04T22:17:51Z

Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.mm

        RetainPtr<NSData> nsInitData = m_initData ? m_initData->createNSData() : nil;
        NSData* nsIdentifier = m_identifier ? [NSData dataWithBytes:m_identifier->data() length:m_identifier->length()] : nil;
        if ([contentKeySession() respondsToSelector:@selector(processContentKeyRequestWithIdentifier:initializationData:options:)])
            [contentKeySession() processContentKeyRequestWithIdentifier:nsIdentifier initializationData:nsInitData.get() options:nil];
        else
            [contentKeySession() processContentKeyRequestInitializationData:nsInitData.get() options:nil];
+        m_hasKeyRequestSemaphore.waitFor(5_s);


A commend and a named constant would help someone looking at this understand why we wait for exactly 5 seconds.

eric-carlson · 2023-04-04T22:19:49Z

Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.mm

+    m_hasKeyRequestSemaphore.signal();
    m_keyRequest = keyRequest;


Shouldn't you signal the semaphore after setting m_keyRequest?

Oh, good point!

(It won't matter in practice because the m_keyRequestLock will protect access to the variable till after this method returns, but you're right that it's currently incorrect.)

webkit-early-warning-system · 2023-04-04T23:17:44Z

EWS run on previous version of this PR (hash 3861d13)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	❌ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

webkit-early-warning-system · 2023-04-05T16:19:20Z

EWS run on previous version of this PR (hash dd48368)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	❌ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

webkit-early-warning-system · 2023-04-05T20:05:28Z

EWS run on current version of this PR (hash e9f85b0)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
❌ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	❌ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	❌ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

https://bugs.webkit.org/show_bug.cgi?id=254992 rdar://107202864 Reviewed by Eric Carlson. Clients of the prefixed WebKit EME APIs using the Fairplay "V2" protocol will use a CDM implementation that relies upon AVStreamSession. This implementation will break when "sampleBufferContentKeySessionSupport" is enabled, as it relies upon platform changes only available through AVContentKeySession. Remove the AVStreamSession-based CDM implementation and funnel all support through the existing AVContentKeySession-based legacy CDM. At the same time, modify that AVContentKeySession-based CDM to query the "sampleBufferContentKeySessionSupport" setting and opt into the non-legacy AVContentKeySession path when it is enabled. Drive-by fix: When opting into the non-legacy codepath, the -contentKeySession:didProvideContentKeyRequest: delegate callbock becomes asynchronous. To retain the existing synchronous behavior of the CDM, set an explicit work queue for the delegate callbacks, and make the setting and getting of m_keyRequest thread-safe. Add a semaphore to be used to detect when the m_keyRequest value changes. Drive-by fix #2: Fix some unified-build included errors exposed by removing CDMSessionAVStreamSession.h Add LayoutTests for basic legacy EME API playback. * LayoutTests/http/tests/media/fairplay/legacy-eme.js: Added. (selectKeySystem): (async startLegacyEME): (extractContentId): (concatInitDataIdAndCertificate): * LayoutTests/http/tests/media/fairplay/legacy-fairplay-error-expected.txt: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-error.html: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-hls-expected.txt: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-hls.html: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v2-expected.txt: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v2.html: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v3-expected.txt: Added. * LayoutTests/http/tests/media/fairplay/legacy-fairplay-mse-v3.html: Added. * LayoutTests/http/tests/media/fairplay/support.js: (uInt16ArrayToString): (stringToUint16Array): * Source/WTF/wtf/PlatformHave.h: * Source/WebCore/Modules/encryptedmedia/legacy/LegacyCDM.cpp: (WebCore::platformRegisterFactories): * Source/WebCore/PAL/pal/cocoa/AVFoundationSoftLink.h: * Source/WebCore/PAL/pal/cocoa/AVFoundationSoftLink.mm: * Source/WebCore/SourcesCocoa.txt: * Source/WebCore/WebCore.xcodeproj/project.pbxproj: * Source/WebCore/platform/graphics/LegacyCDMSession.h: * Source/WebCore/platform/graphics/avfoundation/CDMPrivateMediaSourceAVFObjC.mm: (WebCore::queryDecoderAvailability): (WebCore::CDMPrivateMediaSourceAVFObjC::createSession): * Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.h: * Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVContentKeySession.mm: (-[WebCDMSessionAVContentKeySessionDelegate contentKeySessionContentProtectionSessionIdentifierDidChange:]): (WebCore::CDMSessionAVContentKeySession::CDMSessionAVContentKeySession): (WebCore::CDMSessionAVContentKeySession::update): (WebCore::CDMSessionAVContentKeySession::hasContentKeyRequest const): (WebCore::CDMSessionAVContentKeySession::contentKeyRequest): (WebCore::CDMSessionAVContentKeySession::didProvideContentKeyRequest): (WebCore::CDMSessionAVContentKeySession::contentKeySession): * Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVStreamSession.h: Removed. * Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionAVStreamSession.mm: Removed. * Source/WebCore/platform/graphics/avfoundation/objc/CDMSessionMediaSourceAVFObjC.h: (WebCore::toCDMSessionMediaSourceAVFObjC): * Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaSourceAVFObjC.h: (WebCore::MediaPlayerPrivateMediaSourceAVFObjC::hasStreamSession): Deleted. * Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaSourceAVFObjC.mm: (WebCore::MediaPlayerPrivateMediaSourceAVFObjC::setCDMSession): (WebCore::MediaPlayerPrivateMediaSourceAVFObjC::streamSession): Deleted. * Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm: (WebCore::SourceBufferPrivateAVFObjC::didProvideMediaDataForTrackId): (WebCore::SourceBufferPrivateAVFObjC::willProvideContentKeyRequestInitializationDataForTrackID): (WebCore::SourceBufferPrivateAVFObjC::destroyStreamDataParser): (WebCore::copyKeyIDs): Deleted. * Tools/TestWebKitAPI/Tests/WebCore/cocoa/AVFoundationSoftLinkTest.mm: (TestWebKitAPI::TEST): Canonical link: https://commits.webkit.org/262647@main

webkit-commit-queue · 2023-04-06T00:02:33Z

Committed 262647@main (2ef8f77): https://commits.webkit.org/262647@main

Reviewed commits have been landed. Closing PR #12378 and removing active labels.

jernoble self-assigned this Apr 4, 2023

jernoble added the Media Bugs related to the HTML 5 Media elements. label Apr 4, 2023

webkit-ews-buildbot added the merging-blocked Applied to prevent a change from being merged label Apr 4, 2023

jernoble requested review from eric-carlson and jyavenard April 4, 2023 19:20

jernoble removed the merging-blocked Applied to prevent a change from being merged label Apr 4, 2023

jernoble force-pushed the eng/Cocoa-Transition-Legacy-Fairplay-CDM-off-AVStreamSession branch from 2b6c8d3 to e52af3e Compare April 4, 2023 19:21

webkit-ews-buildbot added the merging-blocked Applied to prevent a change from being merged label Apr 4, 2023

eric-carlson approved these changes Apr 4, 2023

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jernoble removed the merging-blocked Applied to prevent a change from being merged label Apr 4, 2023

jernoble force-pushed the eng/Cocoa-Transition-Legacy-Fairplay-CDM-off-AVStreamSession branch from e52af3e to 3861d13 Compare April 4, 2023 23:14

webkit-ews-buildbot added the merging-blocked Applied to prevent a change from being merged label Apr 5, 2023

jernoble removed the merging-blocked Applied to prevent a change from being merged label Apr 5, 2023

jernoble force-pushed the eng/Cocoa-Transition-Legacy-Fairplay-CDM-off-AVStreamSession branch from 3861d13 to dd48368 Compare April 5, 2023 16:17

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jernoble removed the merging-blocked Applied to prevent a change from being merged label Apr 5, 2023

jernoble force-pushed the eng/Cocoa-Transition-Legacy-Fairplay-CDM-off-AVStreamSession branch from dd48368 to e9f85b0 Compare April 5, 2023 20:02

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webkit-commit-queue force-pushed the eng/Cocoa-Transition-Legacy-Fairplay-CDM-off-AVStreamSession branch from e9f85b0 to 2ef8f77 Compare April 6, 2023 00:02

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[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession #12378

[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession #12378

jernoble commented Apr 4, 2023 •

edited by webkit-early-warning-system

webkit-early-warning-system commented Apr 4, 2023 •

edited

webkit-early-warning-system commented Apr 4, 2023 •

edited

eric-carlson Apr 4, 2023

eric-carlson Apr 4, 2023

jernoble Apr 4, 2023

jernoble Apr 4, 2023

webkit-early-warning-system commented Apr 4, 2023 •

edited

webkit-early-warning-system commented Apr 5, 2023 •

edited

webkit-early-warning-system commented Apr 5, 2023 •

edited

webkit-commit-queue commented Apr 6, 2023

		m_hasKeyRequestSemaphore.signal();
		m_keyRequest = keyRequest;

[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession #12378

[Cocoa] Transition Legacy Fairplay CDM off AVStreamSession #12378

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jernoble commented Apr 4, 2023 • edited by webkit-early-warning-system

2ef8f77

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jernoble commented Apr 4, 2023 •

edited by webkit-early-warning-system

`2ef8f77`

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