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Bug 1232527 - Call into WMF PDM to determine if WMF can decode instead of using GMPVideoDecoderTrialCreator. r=jwwang

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Resurrect WMFDecoderModule::HasAAC() and HasH264(), and use those in
MediaKeySystemAccess.cpp to figure out whether we gmp-clearkey can decode,
rather than assuming Vista and later is always able to decode, as that's not
a valid assumption; Vista may not have the required Platfor Update installed,
or we may be on Windows N or KN without the Media Feature Pack.
This commit is contained in:
Chris Pearce 2015-12-15 14:50:59 +13:00
parent 1c2f5f3176
commit 70555bdeaf
5 changed files with 62 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
dom/media/eme/MediaKeySystemAccess.cpp
View File

@ -33,6 +33,9 @@
#include "nsXULAppAPI.h"
#include "gmp-audio-decode.h"
#include "gmp-video-decode.h"
#ifdef XP_WIN
#include "WMFDecoderModule.h"
#endif
#if defined(XP_WIN) || defined(XP_MACOSX)
#define PRIMETIME_EME_SUPPORTED 1
@ -316,7 +319,16 @@ GMPDecryptsAndDecodesAAC(mozIGeckoMediaPluginService* aGMPS,
return HaveGMPFor(aGMPS,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_AUDIO_DECODER),
NS_LITERAL_CSTRING("aac"));
NS_LITERAL_CSTRING("aac"))
#ifdef XP_WIN
// Clearkey on Windows advertises that it can decode in its GMP info
// file, but uses Windows Media Foundation to decode. That's not present
// on Windows XP, and on some Vista, Windows N, and KN variants without
// certain services packs. So for ClearKey we must check that WMF will
// work.
&& (!aKeySystem.EqualsLiteral("org.w3.clearkey") || WMFDecoderModule::HasAAC())
#endif
;
}
static bool
@ -329,7 +341,16 @@ GMPDecryptsAndDecodesH264(mozIGeckoMediaPluginService* aGMPS,
return HaveGMPFor(aGMPS,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_VIDEO_DECODER),
NS_LITERAL_CSTRING("h264"));
NS_LITERAL_CSTRING("h264"))
#ifdef XP_WIN
// Clearkey on Windows advertises that it can decode in its GMP info
// file, but uses Windows Media Foundation to decode. That's not present
// on Windows XP, and on some Vista, Windows N, and KN variants without
// certain services packs. So for ClearKey we must check that WMF will
// work.
&& (!aKeySystem.EqualsLiteral("org.w3.clearkey") || WMFDecoderModule::HasH264())
#endif
;
}
// If this keysystem's CDM explicitly says it doesn't support decoding,
@ -352,9 +373,12 @@ GMPDecryptsAndGeckoDecodesH264(mozIGeckoMediaPluginService* aGMPService,
NS_LITERAL_CSTRING(GMP_API_VIDEO_DECODER),
NS_LITERAL_CSTRING("h264"))
#ifdef XP_WIN
// Clearkey on Windows XP can't decode, but advertises that it can
// in its GMP info file.
|| (aKeySystem.EqualsLiteral("org.w3.clearkey") && !IsVistaOrLater())
// Clearkey on Windows advertises that it can decode in its GMP info
// file, but uses Windows Media Foundation to decode. That's not present
// on Windows XP, and on some Vista, Windows N, and KN variants without
// certain services packs. So don't try to use gmp-clearkey for decoding
// if we don't have a decoder here.
|| (aKeySystem.EqualsLiteral("org.w3.clearkey") && !WMFDecoderModule::HasH264())
#endif
) && MP4Decoder::CanHandleMediaType(aContentType);
}
@ -374,9 +398,12 @@ GMPDecryptsAndGeckoDecodesAAC(mozIGeckoMediaPluginService* aGMPService,
NS_LITERAL_CSTRING(GMP_API_AUDIO_DECODER),
NS_LITERAL_CSTRING("aac"))
#ifdef XP_WIN
// Clearkey on Windows XP can't decode, but advertises that it can
// in its GMP info file.
|| (aKeySystem.EqualsLiteral("org.w3.clearkey") && !IsVistaOrLater())
// Clearkey on Windows advertises that it can decode in its GMP info
// file, but uses Windows Media Foundation to decode. That's not present
// on Windows XP, and on some Vista, Windows N, and KN variants without
// certain services packs. So don't try to use gmp-clearkey for decoding
// if we don't have a decoder here.
|| (aKeySystem.EqualsLiteral("org.w3.clearkey") && !WMFDecoderModule::HasAAC())
#endif
) && MP4Decoder::CanHandleMediaType(aContentType);
}

20
dom/media/eme/MediaKeySystemAccessManager.cpp
View File

@ -73,19 +73,6 @@ MediaKeySystemAccessManager::Request(DetailedPromise* aPromise,
Request(aPromise, aKeySystem, aConfigs, RequestType::Initial);
}
static bool
ShouldTrialCreateGMP(const nsAString& aKeySystem)
{
// Trial create where the CDM has a Windows Media Foundation decoder.
#ifdef XP_WIN
return Preferences::GetBool("media.gmp.trial-create.enabled", false) &&
aKeySystem.EqualsLiteral("org.w3.clearkey") &&
IsVistaOrLater();
#else
return false;
#endif
}
void
MediaKeySystemAccessManager::Request(DetailedPromise* aPromise,
const nsAString& aKeySystem,
@ -179,13 +166,6 @@ MediaKeySystemAccessManager::Request(DetailedPromise* aPromise,
MediaKeySystemAccess::IsSupported(keySystem, aConfigs)) {
RefPtr<MediaKeySystemAccess> access(
new MediaKeySystemAccess(mWindow, keySystem, NS_ConvertUTF8toUTF16(cdmVersion), config));
if (ShouldTrialCreateGMP(keySystem)) {
// Ensure we have tried creating a GMPVideoDecoder for this
// keySystem, and that we can use it to decode. This ensures that we only
// report that we support this keySystem when the CDM us usable.
mTrialCreator->MaybeAwaitTrialCreate(keySystem, access, aPromise, mWindow);
return;
}
aPromise->MaybeResolve(access);
return;
}

16
dom/media/platforms/wmf/WMFDecoderModule.cpp
View File

@ -163,17 +163,29 @@ CanCreateWMFDecoder()
return result.value();
}
/* static */ bool
WMFDecoderModule::HasH264()
{
return CanCreateWMFDecoder<CLSID_CMSH264DecoderMFT>();
}
/* static */ bool
WMFDecoderModule::HasAAC()
{
return CanCreateWMFDecoder<CLSID_CMSAACDecMFT>();
}
bool
WMFDecoderModule::SupportsMimeType(const nsACString& aMimeType) const
{
if ((aMimeType.EqualsLiteral("audio/mp4a-latm") ||
aMimeType.EqualsLiteral("audio/mp4")) &&
CanCreateWMFDecoder<CLSID_CMSAACDecMFT>()) {
WMFDecoderModule::HasAAC()) {
return true;
}
if ((aMimeType.EqualsLiteral("video/avc") ||
aMimeType.EqualsLiteral("video/mp4")) &&
CanCreateWMFDecoder<CLSID_CMSH264DecoderMFT>()) {
WMFDecoderModule::HasH264()) {
return true;
}
if (aMimeType.EqualsLiteral("audio/mpeg") &&

9
dom/media/platforms/wmf/WMFDecoderModule.h
View File

@ -42,6 +42,15 @@ public:
// Called from any thread, must call init first
static int GetNumDecoderThreads();
static bool LowLatencyMFTEnabled();
// Accessors that report whether we have the required MFTs available
// on the system to play various codecs. Windows Vista doesn't have the
// H.264/AAC decoders if the "Platform Update Supplement for Windows Vista"
// is not installed, and Window N and KN variants also require a "Media
// Feature Pack" to be installed. Windows XP doesn't have WMF.
static bool HasAAC();
static bool HasH264();
private:
bool mWMFInitialized;
};

23
media/gmp-clearkey/0.1/ClearKeySessionManager.cpp
View File

@ -50,16 +50,6 @@ ClearKeySessionManager::~ClearKeySessionManager()
CK_LOGD("ClearKeySessionManager dtor %p", this);
}
static bool
ShouldBeAbleToDecode()
{
#if !defined(ENABLE_WMF)
return false;
#else
return IsWindowsVistaOrGreater();
#endif
}
static bool
CanDecode()
{
@ -75,17 +65,12 @@ ClearKeySessionManager::Init(GMPDecryptorCallback* aCallback)
{
CK_LOGD("ClearKeySessionManager::Init");
mCallback = aCallback;
if (ShouldBeAbleToDecode()) {
if (!CanDecode()) {
const char* err = "EME plugin can't load system decoder!";
mCallback->SessionError(nullptr, 0, kGMPAbortError, 0, err, strlen(err));
} else {
mCallback->SetCapabilities(GMP_EME_CAP_DECRYPT_AND_DECODE_AUDIO |
GMP_EME_CAP_DECRYPT_AND_DECODE_VIDEO);
}
} else {
if (!CanDecode()) {
mCallback->SetCapabilities(GMP_EME_CAP_DECRYPT_AUDIO |
GMP_EME_CAP_DECRYPT_VIDEO);
} else {
mCallback->SetCapabilities(GMP_EME_CAP_DECRYPT_AND_DECODE_AUDIO |
GMP_EME_CAP_DECRYPT_AND_DECODE_VIDEO);
}
ClearKeyPersistence::EnsureInitialized();
}