blob: 3bd33fd9521dde281bca4b29ae62adb18e7b9ca3 [file] [log] [blame]
// Copyright 2014 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 <stdint.h>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "chrome/services/media_gallery_util/public/mojom/media_parser.mojom.h"
#include "media/base/data_source.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace base {
class TaskRunner;
// Provides the metadata parser with blob data from the browser process. Class
// must be created and destroyed on the utility thread. Class may be used as a
// DataSource on a different thread. The utility thread must not be blocked
// for read operations to succeed.
class IPCDataSource : public media::DataSource {
// May only be called on the utility thread.
mojo::PendingRemote<chrome::mojom::MediaDataSource> media_data_source,
int64_t total_size);
~IPCDataSource() override;
// media::DataSource implementation. The methods may be called on any single
// thread. First usage of these methods attaches a thread checker.
void Stop() override;
void Abort() override;
void Read(int64_t position,
int size,
uint8_t* destination,
ReadCB callback) override;
bool GetSize(int64_t* size_out) override;
bool IsStreaming() override;
void SetBitrate(int bitrate) override;
// Media data read helpers: must be run on the utility thread.
void ReadMediaData(uint8_t* destination,
ReadCB callback,
int64_t position,
int size);
void ReadDone(uint8_t* destination,
ReadCB callback,
const std::vector<uint8_t>& data);
mojo::Remote<chrome::mojom::MediaDataSource> media_data_source_;
const int64_t total_size_;
scoped_refptr<base::TaskRunner> utility_task_runner_;
// Enforces that the DataSource methods are called on one other thread only.