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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/fileapi/media/media_path_filter.h"
#include <algorithm>
#include <string>
#include "base/string_util.h"
#include "net/base/mime_util.h"
namespace fileapi {
namespace {
const base::FilePath::CharType* const kExtraSupportedExtensions[] = {
FILE_PATH_LITERAL("3gp"),
FILE_PATH_LITERAL("3gpp"),
FILE_PATH_LITERAL("avi"),
FILE_PATH_LITERAL("flv"),
FILE_PATH_LITERAL("mov"),
FILE_PATH_LITERAL("mpeg"),
FILE_PATH_LITERAL("mpeg4"),
FILE_PATH_LITERAL("mpegps"),
FILE_PATH_LITERAL("mpg"),
FILE_PATH_LITERAL("wmv"),
};
bool IsUnsupportedExtension(const base::FilePath::StringType& extension) {
std::string mime_type;
return !net::GetMimeTypeFromExtension(extension, &mime_type) ||
!net::IsSupportedMimeType(mime_type);
}
} // namespace
MediaPathFilter::MediaPathFilter()
: initialized_(false) {
}
MediaPathFilter::~MediaPathFilter() {
}
bool MediaPathFilter::Match(const base::FilePath& path) {
EnsureInitialized();
return std::binary_search(media_file_extensions_.begin(),
media_file_extensions_.end(),
StringToLowerASCII(path.Extension()));
}
void MediaPathFilter::EnsureInitialized() {
if (initialized_)
return;
base::AutoLock lock(initialization_lock_);
if (initialized_)
return;
net::GetExtensionsForMimeType("image/*", &media_file_extensions_);
net::GetExtensionsForMimeType("audio/*", &media_file_extensions_);
net::GetExtensionsForMimeType("video/*", &media_file_extensions_);
MediaFileExtensionList::iterator new_end =
std::remove_if(media_file_extensions_.begin(),
media_file_extensions_.end(),
&IsUnsupportedExtension);
media_file_extensions_.erase(new_end, media_file_extensions_.end());
// Add other common extensions.
for (size_t i = 0; i < arraysize(kExtraSupportedExtensions); ++i)
media_file_extensions_.push_back(kExtraSupportedExtensions[i]);
for (MediaFileExtensionList::iterator itr = media_file_extensions_.begin();
itr != media_file_extensions_.end(); ++itr)
*itr = base::FilePath::kExtensionSeparator + *itr;
std::sort(media_file_extensions_.begin(), media_file_extensions_.end());
initialized_ = true;
}
} // namespace fileapi
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