shaka-packager/media/file/file.cc

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// Copyright (c) 2013 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style license tha can be
// found in the LICENSE file.
#include "media/file/file.h"
#include "media/file/local_file.h"
namespace media {
const char* kLocalFilePrefix = "file://";
typedef File* (*FileFactoryFunction)(const char* fname, const char* mode);
struct SupportedTypeInfo {
const char* type;
int type_length;
const FileFactoryFunction factory_function;
};
static File* CreateLocalFile(const char* fname, const char* mode) {
return new LocalFile(fname, mode);
}
static const SupportedTypeInfo kSupportedTypeInfo[] = {
{ kLocalFilePrefix, strlen(kLocalFilePrefix), &CreateLocalFile },
};
File* File::Create(const char* fname, const char* mode) {
for (size_t i = 0; i < arraysize(kSupportedTypeInfo); ++i) {
const SupportedTypeInfo& type_info = kSupportedTypeInfo[i];
if (strncmp(type_info.type, fname, type_info.type_length) == 0) {
return type_info.factory_function(fname + type_info.type_length, mode);
}
}
// Otherwise we assume it is a local file
return CreateLocalFile(fname, mode);
}
File* File::Open(const char* name, const char* mode) {
File* file = File::Create(name, mode);
if (!file) {
return NULL;
}
if (!file->Open()) {
delete file;
return NULL;
}
return file;
}
// Return the file size or -1 on failure.
// Requires opening and closing the file.
int64 File::GetFileSize(const char* name) {
File* f = File::Open(name, "r");
if (!f) {
return -1;
}
int64 res = f->Size();
f->Close();
return res;
}
} // namespace media