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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EXPERIMENTAL_O3D_O3DPLUGIN_AUTOGEN_O3D_GLUE_STREAM_MANAGER_H_
#define EXPERIMENTAL_O3D_O3DPLUGIN_AUTOGEN_O3D_GLUE_STREAM_MANAGER_H_
#include <npapi.h>
#include <string>
#include <vector>
#include "base/scoped_ptr.h"
#include "core/cross/callback.h"
#include "plugin/cross/download_stream.h"
namespace glue {
// Stream manager class, to help managing asynchronous loading of URLs into
// files.
class StreamManager {
public:
// TODO : get rid of these horrible callback objects
// and use an interface instead
typedef o3d::Callback1<DownloadStream*> NewStreamCallback;
typedef o3d::Callback4<DownloadStream*,
bool,
const std::string &,
const std::string &> FinishedCallback;
// The signature for these callbacks corresponds to the NPP_WriteReady()
// and NPP_Write() calls
typedef o3d::ResultCallback1<int32, DownloadStream*> WriteReadyCallback;
typedef o3d::ResultCallback4<int32,
DownloadStream*,
int32,
int32,
void*> WriteCallback;
explicit StreamManager(NPP plugin_instance);
~StreamManager();
// Loads URL into a file, calls finished_callback->Run(success, filename)
// when done.
// returns a DownloadStream object (or NULL) if error
// filename is the name of the file where the contents of the URL are
// stored.
// LoadURL() takes ownership of new_stream_callback, write_ready_callback,
// write_callback, and callback: They will be deleted once the stream has
// completed.
DownloadStream *LoadURL(const std::string &url,
NewStreamCallback *new_stream_callback,
WriteReadyCallback *write_ready_callback,
WriteCallback *write_callback,
FinishedCallback *callback,
uint16 stream_type);
// Manages the NPP_NewStream callback.
bool NewStream(NPStream *stream, uint16 *stype);
// Manages the NPP_DestroyStream callback.
bool DestroyStream(NPStream *stream, NPReason reason);
// Manages the NPP_StreamAsFile callback.
bool SetStreamFile(NPStream *stream, const char *filename);
// Manages the NPP_URLNotify callback.
bool URLNotify(const char *url, NPReason reason, void *notifyData);
// Continuous streaming support
int32 WriteReady(NPStream *stream);
int32 Write(NPStream *stream, int32 offset, int32 len, void *buffer);
private:
class NPDownloadStream : public DownloadStream {
public:
NPDownloadStream(const std::string &url,
const std::string &file,
uint16 stream_type,
NPP plugin_instance,
NewStreamCallback *new_stream_callback,
WriteReadyCallback *write_ready_callback,
WriteCallback *write_callback,
FinishedCallback *callback)
: url_(url),
file_(file),
stream_type_(stream_type),
plugin_instance_(plugin_instance),
stream_(NULL),
new_stream_callback_(new_stream_callback),
write_ready_callback_(write_ready_callback),
write_callback_(write_callback),
finished_callback_(callback),
bytes_received_(0),
state_(STREAM_REQUESTED) {}
virtual ~NPDownloadStream();
// DownloadStream interface
virtual std::string GetURL();
virtual std::string GetCachedFile();
virtual State GetState();
virtual int GetReceivedByteCount();
virtual size_t GetStreamLength();
virtual void Cancel();
// NPAPI stream stuff
NPStream *GetStream() const { return stream_; }
bool NewStream(NPStream *new_stream, uint16 *stype);
bool DestroyStream(NPReason reason);
bool SetStreamFile(const char *filename);
bool URLNotify(NPReason reason);
int32 WriteReady();
int32 Write(int32 offset, int32 len, void *buffer);
private:
std::string url_;
std::string file_;
// stream type (as file or continuous stream)
uint16 stream_type_;
NPP plugin_instance_;
NPStream *stream_;
// callbacks
scoped_ptr<NewStreamCallback> new_stream_callback_;
scoped_ptr<WriteReadyCallback> write_ready_callback_;
scoped_ptr<WriteCallback> write_callback_;
scoped_ptr<FinishedCallback> finished_callback_;
int bytes_received_;
State state_;
};
bool CheckEntry(NPDownloadStream *entry);
NPP plugin_instance_;
std::vector<NPDownloadStream *> entries_;
};
} // namespace glue
#endif // EXPERIMENTAL_O3D_O3DPLUGIN_AUTOGEN_O3D_GLUE_STREAM_MANAGER_H_
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