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// Copyright (c) 2011 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 "media/base/composite_data_source_factory.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
namespace media {
class CompositeDataSourceFactory::BuildRequest
: public AsyncDataSourceFactoryBase::BuildRequest {
public:
BuildRequest(const std::string& url, BuildCallback* callback,
const FactoryList& factories);
~BuildRequest();
protected:
// AsyncDataSourceFactoryBase::BuildRequest method.
virtual void DoStart();
private:
void CallNextFactory();
void OnBuildDone(PipelineStatus status, DataSource* data_source);
FactoryList factories_;
};
CompositeDataSourceFactory::CompositeDataSourceFactory() {}
CompositeDataSourceFactory::~CompositeDataSourceFactory() {
STLDeleteElements(&factories_);
}
void CompositeDataSourceFactory::AddFactory(DataSourceFactory* factory) {
DCHECK(factory);
factories_.push_back(factory);
}
DataSourceFactory* CompositeDataSourceFactory::Clone() const {
CompositeDataSourceFactory* new_factory = new CompositeDataSourceFactory();
for (FactoryList::const_iterator itr = factories_.begin();
itr != factories_.end();
++itr) {
new_factory->AddFactory((*itr)->Clone());
}
return new_factory;
}
bool CompositeDataSourceFactory::AllowRequests() const {
return !factories_.empty();
}
AsyncDataSourceFactoryBase::BuildRequest*
CompositeDataSourceFactory::CreateRequest(const std::string& url,
BuildCallback* callback) {
return new BuildRequest(url, callback, factories_);
}
CompositeDataSourceFactory::BuildRequest::BuildRequest(
const std::string& url,
BuildCallback* callback,
const FactoryList& factories)
: AsyncDataSourceFactoryBase::BuildRequest(url, callback),
factories_(factories){
DCHECK(!factories.empty());
}
CompositeDataSourceFactory::BuildRequest::~BuildRequest() {}
void CompositeDataSourceFactory::BuildRequest::DoStart() {
CallNextFactory();
}
void CompositeDataSourceFactory::BuildRequest::CallNextFactory() {
DCHECK(!factories_.empty());
DataSourceFactory* factory = factories_.front();
factories_.pop_front();
factory->Build(url(), NewCallback(this, &BuildRequest::OnBuildDone));
}
void CompositeDataSourceFactory::BuildRequest::OnBuildDone(
PipelineStatus status,
DataSource* data_source) {
if (status == PIPELINE_OK) {
DCHECK(data_source);
RequestComplete(status, data_source);
return;
}
DCHECK(!data_source);
if ((status == DATASOURCE_ERROR_URL_NOT_SUPPORTED) && !factories_.empty()) {
CallNextFactory();
return;
}
RequestComplete(status, data_source);
}
} // namespace media
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