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Bug 1211339 Part 3 - Refuse to support video codecs inside audio mime types. r=jya

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This commit is contained in:
Chris Pearce 2015-10-06 16:53:03 +13:00
parent ee04318d99
commit 65aff64abb
1 changed files with 11 additions and 9 deletions
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20
dom/media/fmp4/MP4Decoder.cpp
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@ -98,10 +98,11 @@ MP4Decoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
// Whitelist MP4 types, so they explicitly match what we encounter on
// the web, as opposed to what we use internally (i.e. what our demuxers
// etc output).
if (!aMIMETypeExcludingCodecs.EqualsASCII("audio/mp4") &&
!aMIMETypeExcludingCodecs.EqualsASCII("audio/x-m4a") &&
!aMIMETypeExcludingCodecs.EqualsASCII("video/mp4") &&
!aMIMETypeExcludingCodecs.EqualsASCII("video/x-m4v")) {
const bool isMP4Audio = aMIMETypeExcludingCodecs.EqualsASCII("audio/mp4") ||
aMIMETypeExcludingCodecs.EqualsASCII("audio/x-m4a");
const bool isMP4Video = aMIMETypeExcludingCodecs.EqualsASCII("video/mp4") ||
aMIMETypeExcludingCodecs.EqualsASCII("video/x-m4v");
if (!isMP4Audio && !isMP4Video) {
return false;
}
@ -114,11 +115,10 @@ MP4Decoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
nsTArray<nsCString> codecMimes;
if (aCodecs.IsEmpty()) {
// No codecs specified. Assume AAC/H.264
if (aMIMETypeExcludingCodecs.EqualsLiteral("audio/mp4") ||
aMIMETypeExcludingCodecs.EqualsLiteral("audio/x-m4a")) {
if (isMP4Audio) {
codecMimes.AppendElement(NS_LITERAL_CSTRING("audio/mp4a-latm"));
} else if (aMIMETypeExcludingCodecs.EqualsLiteral("video/mp4") ||
aMIMETypeExcludingCodecs.EqualsLiteral("video/x-m4v")) {
} else {
MOZ_ASSERT(isMP4Video);
codecMimes.AppendElement(NS_LITERAL_CSTRING("video/avc"));
}
} else {
@ -137,7 +137,9 @@ MP4Decoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
codecMimes.AppendElement(NS_LITERAL_CSTRING("audio/mpeg"));
continue;
}
if (IsWhitelistedH264Codec(codec)) {
// Note: Only accept H.264 in a video content type, not in an audio
// content type.
if (IsWhitelistedH264Codec(codec) && isMP4Video) {
codecMimes.AppendElement(NS_LITERAL_CSTRING("video/avc"));
continue;
}