I420ColorConverter::I420ColorConverter() {
// Open the shared library
mHandle = dlopen("libI420colorconvert.so", RTLD_NOW);
if (mHandle == NULL) {
ALOGW("I420ColorConverter: cannot load libI420colorconvert.so");
return;
}
// Find the entry point
void (*getI420ColorConverter)(I420ColorConverter *converter) =
(void (*)(I420ColorConverter*)) dlsym(mHandle, "getI420ColorConverter");
if (getI420ColorConverter == NULL) {
ALOGW("I420ColorConverter: cannot load getI420ColorConverter");
dlclose(mHandle);
mHandle = NULL;
return;
}
// Fill the function pointers.
getI420ColorConverter(this);
ALOGI("I420ColorConverter: libI420colorconvert.so loaded");
}
// Prerequisite: a writer-lock should be held
bool
I420ColorConverterHelper::loadLocked()
{
if (loadedLocked()) {
return true;
}
unloadLocked();
// Open the shared library
mHandle = dlopen("libI420colorconvert.so", RTLD_NOW);
if (mHandle == nullptr) {
LOG("libI420colorconvert.so not found");
return false;
}
// Find the entry point
// Pointer to function with signature
// void getI420ColorConverter(II420ColorConverter *converter)
typedef int (* getConverterFn)(II420ColorConverter *converter);
getConverterFn getI420ColorConverter =
(getConverterFn) dlsym(mHandle, "getI420ColorConverter");
if (getI420ColorConverter == nullptr) {
LOG("Cannot load getI420ColorConverter from libI420colorconvert.so");
unloadLocked();
return false;
}
// Fill the function pointers.
getI420ColorConverter(&mConverter);
if (mConverter.getDecoderOutputFormat == nullptr ||
mConverter.convertDecoderOutputToI420 == nullptr ||
mConverter.getEncoderInputFormat == nullptr ||
mConverter.convertI420ToEncoderInput == nullptr ||
mConverter.getEncoderInputBufferInfo == nullptr) {
LOG("Failed to initialize I420 color converter");
unloadLocked();
return false;
}
return true;
}
