static bool
GMPDecryptsAndGeckoDecodesAAC(mozIGeckoMediaPluginService* aGMPService,
const nsAString& aKeySystem,
const nsAString& aContentType,
DecoderDoctorDiagnostics* aDiagnostics)
{
MOZ_ASSERT(HaveGMPFor(aGMPService,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_DECRYPTOR)));
MOZ_ASSERT(IsAACContentType(aContentType));
if (HaveGMPFor(aGMPService,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_AUDIO_DECODER),
NS_LITERAL_CSTRING("aac"))) {
// We do have a GMP for AAC -> Gecko itself does *not* decode AAC.
return false;
}
#if defined(MOZ_WIDEVINE_EME) && defined(XP_WIN)
// Widevine CDM doesn't include an AAC decoder. So if WMF can't
// decode AAC, and a codec wasn't specified, be conservative
// and reject the MediaKeys request, since our policy is to prevent
// the Adobe GMP's unencrypted AAC decoding path being used to
// decode content decrypted by the Widevine CDM.
if (aKeySystem.EqualsLiteral("com.widevine.alpha") &&
!WMFDecoderModule::HasAAC()) {
if (aDiagnostics) {
aDiagnostics->SetKeySystemIssue(
DecoderDoctorDiagnostics::eWidevineWithNoWMF);
}
return false;
}
#endif
return MP4Decoder::CanHandleMediaType(aContentType, aDiagnostics);
}
static bool
IsSupportedAudio(mozIGeckoMediaPluginService* aGMPService,
const nsAString& aKeySystem,
const nsAString& aAudioType)
{
return IsAACContentType(aAudioType) &&
(GMPDecryptsAndDecodesAAC(aGMPService, aKeySystem) ||
GMPDecryptsAndGeckoDecodesAAC(aGMPService, aKeySystem, aAudioType));
}
static bool
GMPDecryptsAndGeckoDecodesAAC(mozIGeckoMediaPluginService* aGMPService,
const nsAString& aKeySystem,
const nsAString& aContentType)
{
MOZ_ASSERT(HaveGMPFor(aGMPService,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_DECRYPTOR)));
MOZ_ASSERT(IsAACContentType(aContentType));
return
(!HaveGMPFor(aGMPService,
NS_ConvertUTF16toUTF8(aKeySystem),
NS_LITERAL_CSTRING(GMP_API_AUDIO_DECODER),
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 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);
}
