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// Copyright 2019 The libgav1 Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "examples/file_reader_factory.h"
#include <memory>
#include <new>
#include <string>
#include <vector>
#include "examples/logging.h"
namespace libgav1 {
namespace {
std::vector<FileReaderFactory::OpenFunction>* GetFileReaderOpenFunctions() {
static auto* open_functions =
new (std::nothrow) std::vector<FileReaderFactory::OpenFunction>();
return open_functions;
}
} // namespace
bool FileReaderFactory::RegisterReader(OpenFunction open_function) {
if (open_function == nullptr) return false;
auto* open_functions = GetFileReaderOpenFunctions();
const size_t num_readers = open_functions->size();
open_functions->push_back(open_function);
return open_functions->size() == num_readers + 1;
}
std::unique_ptr<FileReaderInterface> FileReaderFactory::OpenReader(
const std::string& file_name, const bool error_tolerant /*= false*/) {
for (auto* open_function : *GetFileReaderOpenFunctions()) {
auto reader = open_function(file_name, error_tolerant);
if (reader == nullptr) continue;
return reader;
}
LIBGAV1_EXAMPLES_LOG_ERROR("No file reader able to open input");
return nullptr;
}
} // namespace libgav1
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