gecko-dev/dom/media/omx/I420ColorConverterHelper.cpp

230 строки
6.0 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "I420ColorConverterHelper.h"
#include <dlfcn.h>
#include "prlog.h"
#ifdef PR_LOGGING
PRLogModuleInfo *gI420ColorConverterHelperLog;
#define LOG(msg...) PR_LOG(gI420ColorConverterHelperLog, PR_LOG_WARNING, (msg))
#else
#define LOG(x...)
#endif
namespace android {
I420ColorConverterHelper::I420ColorConverterHelper()
: mHandle(nullptr)
, mConverter({nullptr, nullptr, nullptr, nullptr, nullptr})
{
#ifdef PR_LOGGING
if (!gI420ColorConverterHelperLog) {
gI420ColorConverterHelperLog = PR_NewLogModule("I420ColorConverterHelper");
}
#endif
}
I420ColorConverterHelper::~I420ColorConverterHelper()
{
RWLock::AutoWLock awl(mLock);
unloadLocked();
}
// 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;
}
// Prerequisite: a reader-lock or a writer-lock should be held
bool
I420ColorConverterHelper::loadedLocked() const
{
if (mHandle == nullptr ||
mConverter.getDecoderOutputFormat == nullptr ||
mConverter.convertDecoderOutputToI420 == nullptr ||
mConverter.getEncoderInputFormat == nullptr ||
mConverter.convertI420ToEncoderInput == nullptr ||
mConverter.getEncoderInputBufferInfo == nullptr) {
return false;
}
return true;
}
// Prerequisite: a writer-lock should be held
void
I420ColorConverterHelper::unloadLocked()
{
if (mHandle != nullptr) {
dlclose(mHandle);
}
mHandle = nullptr;
mConverter.getDecoderOutputFormat = nullptr;
mConverter.convertDecoderOutputToI420 = nullptr;
mConverter.getEncoderInputFormat = nullptr;
mConverter.convertI420ToEncoderInput = nullptr;
mConverter.getEncoderInputBufferInfo = nullptr;
}
bool
I420ColorConverterHelper::ensureLoaded()
{
{
RWLock::AutoRLock arl(mLock);
// Check whether the library has been loaded or not.
if (loadedLocked()) {
return true;
}
}
{
RWLock::AutoWLock awl(mLock);
// Check whether the library has been loaded or not on other threads.
if (loadedLocked()) {
return true;
}
// Reload the library
unloadLocked();
if (loadLocked()) {
return true;
}
// Reset the library
unloadLocked();
}
return false;
}
int
I420ColorConverterHelper::getDecoderOutputFormat()
{
if (!ensureLoaded()) {
return -1;
}
RWLock::AutoRLock arl(mLock);
if (mConverter.getDecoderOutputFormat != nullptr) {
return mConverter.getDecoderOutputFormat();
}
return -1;
}
int
I420ColorConverterHelper::convertDecoderOutputToI420(
void* decoderBits, int decoderWidth, int decoderHeight,
ARect decoderRect, void* dstBits)
{
if (!ensureLoaded()) {
return -1;
}
RWLock::AutoRLock arl(mLock);
if (mConverter.convertDecoderOutputToI420 != nullptr) {
return mConverter.convertDecoderOutputToI420(decoderBits,
decoderWidth, decoderHeight, decoderRect, dstBits);
}
return -1;
}
int
I420ColorConverterHelper::getEncoderInputFormat()
{
if (!ensureLoaded()) {
return -1;
}
RWLock::AutoRLock arl(mLock);
if (mConverter.getEncoderInputFormat != nullptr) {
return mConverter.getEncoderInputFormat();
}
return -1;
}
int
I420ColorConverterHelper::convertI420ToEncoderInput(void* aSrcBits,
int aSrcWidth,
int aSrcHeight,
int aEncoderWidth,
int aEncoderHeight,
ARect aEncoderRect,
void* aEncoderBits)
{
if (!ensureLoaded()) {
return -1;
}
RWLock::AutoRLock arl(mLock);
if (mConverter.convertI420ToEncoderInput != nullptr) {
return mConverter.convertI420ToEncoderInput(aSrcBits, aSrcWidth, aSrcHeight,
aEncoderWidth, aEncoderHeight, aEncoderRect, aEncoderBits);
}
return -1;
}
int
I420ColorConverterHelper::getEncoderInputBufferInfo(int aSrcWidth,
int aSrcHeight,
int* aEncoderWidth,
int* aEncoderHeight,
ARect* aEncoderRect,
int* aEncoderBufferSize)
{
if (!ensureLoaded()) {
return -1;
}
RWLock::AutoRLock arl(mLock);
if (mConverter.getEncoderInputBufferInfo != nullptr) {
return mConverter.getEncoderInputBufferInfo(aSrcWidth, aSrcHeight,
aEncoderWidth, aEncoderHeight, aEncoderRect, aEncoderBufferSize);
}
return -1;
}
} // namespace android