// Pre-load DLLs that need to be used by the EME plugin but that can't be
// loaded after the sandbox has started
bool
GMPChild::PreLoadLibraries(const nsAString& aPluginPath)
{
// This must be in sorted order and lowercase!
static const char* whitelist[] = {
"d3d9.dll", // Create an `IDirect3D9` to get adapter information
"dxva2.dll", // Get monitor information
"evr.dll", // MFGetStrideForBitmapInfoHeader
"mfh264dec.dll", // H.264 decoder (on Windows Vista)
"mfheaacdec.dll", // AAC decoder (on Windows Vista)
"mfplat.dll", // MFCreateSample, MFCreateAlignedMemoryBuffer, MFCreateMediaType
"msauddecmft.dll", // AAC decoder (on Windows 8)
"msmpeg2adec.dll", // AAC decoder (on Windows 7)
"msmpeg2vdec.dll", // H.264 decoder
};
nsCOMPtr<nsIFile> infoFile;
GetInfoFile(aPluginPath, infoFile);
static const size_t MAX_GMP_INFO_FILE_LENGTH = 5 * 1024;
nsAutoCString info;
if (!ReadIntoString(infoFile, info, MAX_GMP_INFO_FILE_LENGTH)) {
NS_WARNING("Failed to read info file in GMP process.");
return false;
}
// Note: we pass "\r\n" to SplitAt so that we'll split lines delimited
// by \n (Unix), \r\n (Windows) and \r (old MacOSX).
nsTArray<nsCString> lines;
SplitAt("\r\n", info, lines);
for (nsCString line : lines) {
// Make lowercase.
std::transform(line.BeginWriting(),
line.EndWriting(),
line.BeginWriting(),
tolower);
const char* libraries = "libraries:";
int32_t offset = line.Find(libraries, false, 0);
if (offset == kNotFound) {
continue;
}
// Line starts with "libraries:".
nsTArray<nsCString> libs;
SplitAt(",", Substring(line, offset + strlen(libraries)), libs);
for (nsCString lib : libs) {
lib.Trim(" ");
for (const char* whiteListedLib : whitelist) {
if (lib.EqualsASCII(whiteListedLib)) {
LoadLibraryA(lib.get());
break;
}
}
}
}
return true;
}
bool
GMPInfoFileParser::Init(nsIFile* aInfoFile)
{
nsTArray<nsCString> lines;
static const size_t MAX_GMP_INFO_FILE_LENGTH = 5 * 1024;
nsAutoCString info;
if (!ReadIntoString(aInfoFile, info, MAX_GMP_INFO_FILE_LENGTH)) {
NS_WARNING("Failed to read info file in GMP process.");
return false;
}
// Note: we pass "\r\n" to SplitAt so that we'll split lines delimited
// by \n (Unix), \r\n (Windows) and \r (old MacOSX).
SplitAt("\r\n", info, lines);
for (nsCString line : lines) {
// Field name is the string up to but not including the first ':'
// character on the line.
int32_t colon = line.FindChar(':');
if (colon <= 0) {
// Not allowed to be the first character.
// Info field name must be at least one character.
continue;
}
nsAutoCString key(Substring(line, 0, colon));
ToLowerCase(key);
key.Trim(" ");
nsCString* value = new nsCString(Substring(line, colon + 1));
value->Trim(" ");
mValues.Put(key, value); // Hashtable assumes ownership of value.
}
return true;
}
