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Bug 1656927 - Assertion failure: aContentType.Equals("image/avif"), at /builds/worker/checkouts/gecko/image/imgLoader.cpp:2785. r=aosmond

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Differential Revision: https://phabricator.services.mozilla.com/D85803
This commit is contained in:
Jon Bauman 2020-08-04 17:30:14 +00:00
parent f468d1bd79
commit eb0d0b2471
2 changed files with 15 additions and 2 deletions
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7
image/imgLoader.cpp
View File

@ -2729,6 +2729,8 @@ imgLoader::GetMIMETypeFromContent(nsIRequest* aRequest,
nsresult imgLoader::GetMimeTypeFromContent(const char* aContents,
uint32_t aLength,
nsACString& aContentType) {
nsAutoCString detected;
/* Is it a GIF? */
if (aLength >= 6 &&
(!strncmp(aContents, "GIF87a", 6) || !strncmp(aContents, "GIF89a", 6))) {
@ -2781,8 +2783,9 @@ nsresult imgLoader::GetMimeTypeFromContent(const char* aContents,
aContentType.AssignLiteral(IMAGE_WEBP);
} else if (MatchesMP4(reinterpret_cast<const uint8_t*>(aContents), aLength,
aContentType)) {
MOZ_ASSERT(aContentType.Equals(IMAGE_AVIF));
detected) &&
detected.Equals(IMAGE_AVIF)) {
aContentType.AssignLiteral(IMAGE_AVIF);
} else {
/* none of the above? I give up */
return NS_ERROR_NOT_AVAILABLE;

10
image/test/gtest/TestLoader.cpp
View File

@ -87,6 +87,16 @@ TEST_F(ImageLoader, DetectAVIFCompatibleBrand) {
CheckMimeType(buffer, sizeof(buffer), IMAGE_AVIF);
}
TEST_F(ImageLoader, DetectNonImageMP4) {
const char buffer[] =
"\x00\x00\x00\x1c" // box length
"ftyp" // box type
"isom" // major brand
"\x00\x00\x02\x00" // minor version
"isomiso2mp41"; // compatible brands
CheckMimeType(buffer, sizeof(buffer), nullptr);
}
TEST_F(ImageLoader, DetectNone) {
const char buffer[] = "abcdefghijklmnop";
CheckMimeType(buffer, sizeof(buffer), nullptr);