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// Copyright (c) 2010 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 <limits>
#include "base/file_util.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "media/base/filter_host.h"
#include "media/base/filters.h"
#include "media/base/pipeline.h"
#include "media/filters/file_data_source.h"
namespace media {
FileDataSource::FileDataSource()
: file_(NULL),
file_size_(0) {
}
FileDataSource::~FileDataSource() {
DCHECK(!file_);
}
void FileDataSource::Initialize(const std::string& url,
FilterCallback* callback) {
DCHECK(!file_);
scoped_ptr<FilterCallback> c(callback);
#if defined(OS_WIN)
FilePath file_path(UTF8ToWide(url));
#else
FilePath file_path(url);
#endif
if (file_util::GetFileSize(file_path, &file_size_)) {
file_ = file_util::OpenFile(file_path, "rb");
}
if (!file_) {
file_size_ = 0;
host()->SetError(PIPELINE_ERROR_URL_NOT_FOUND);
callback->Run();
return;
}
media_format_.SetAsString(MediaFormat::kMimeType,
mime_type::kApplicationOctetStream);
media_format_.SetAsString(MediaFormat::kURL, url);
host()->SetTotalBytes(file_size_);
host()->SetBufferedBytes(file_size_);
callback->Run();
}
void FileDataSource::Stop(FilterCallback* callback) {
AutoLock l(lock_);
if (file_) {
file_util::CloseFile(file_);
file_ = NULL;
file_size_ = 0;
}
if (callback) {
callback->Run();
delete callback;
}
}
const MediaFormat& FileDataSource::media_format() {
return media_format_;
}
void FileDataSource::Read(int64 position, size_t size, uint8* data,
ReadCallback* read_callback) {
DCHECK(file_);
AutoLock l(lock_);
scoped_ptr<ReadCallback> callback(read_callback);
if (file_) {
#if defined(OS_WIN)
if (_fseeki64(file_, position, SEEK_SET)) {
callback->RunWithParams(
Tuple1<size_t>(static_cast<size_t>(DataSource::kReadError)));
return;
}
#else
CHECK(position <= std::numeric_limits<int32>::max());
// TODO(hclam): Change fseek() to support 64-bit position.
if (fseek(file_, static_cast<int32>(position), SEEK_SET)) {
callback->RunWithParams(
Tuple1<size_t>(static_cast<size_t>(DataSource::kReadError)));
return;
}
#endif
size_t size_read = fread(data, 1, size, file_);
if (size_read == size || !ferror(file_)) {
callback->RunWithParams(
Tuple1<size_t>(static_cast<size_t>(size_read)));
return;
}
}
callback->RunWithParams(Tuple1<size_t>(static_cast<size_t>(kReadError)));
}
bool FileDataSource::GetSize(int64* size_out) {
DCHECK(size_out);
DCHECK(file_);
AutoLock l(lock_);
*size_out = file_size_;
return (NULL != file_);
}
bool FileDataSource::IsStreaming() {
return false;
}
} // namespace media
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