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// 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.
#ifndef MEDIA_MIDI_USB_MIDI_DESCRIPTOR_PARSER_H_
#define MEDIA_MIDI_USB_MIDI_DESCRIPTOR_PARSER_H_
#include <vector>
#include "base/basictypes.h"
#include "media/base/media_export.h"
#include "media/midi/usb_midi_jack.h"
namespace media {
class UsbMidiDevice;
// UsbMidiDescriptorParser parses USB descriptors and
// generates input / output lists of MIDIPortInfo.
// This is not a generic USB descriptor parser: this parser is designed
// for collecting USB-MIDI jacks information from the descriptor.
class MEDIA_EXPORT UsbMidiDescriptorParser {
public:
UsbMidiDescriptorParser();
~UsbMidiDescriptorParser();
// Returns true if the operation succeeds.
// When an incorrect input is given, this method may return true but
// never crashes.
bool Parse(UsbMidiDevice* device,
const uint8* data,
size_t size,
std::vector<UsbMidiJack>* jacks);
private:
bool ParseInternal(UsbMidiDevice* device,
const uint8* data,
size_t size,
std::vector<UsbMidiJack>* jacks);
bool ParseInterface(const uint8* data, size_t size);
bool ParseCSInterface(UsbMidiDevice* device, const uint8* data, size_t size);
bool ParseEndpoint(const uint8* data, size_t size);
bool ParseCSEndpoint(const uint8* data,
size_t size,
std::vector<UsbMidiJack>* jacks);
void Clear();
bool is_parsing_usb_midi_interface_;
uint8 current_endpoint_address_;
uint8 current_cable_number_;
std::vector<UsbMidiJack> incomplete_jacks_;
DISALLOW_COPY_AND_ASSIGN(UsbMidiDescriptorParser);
};
} // namespace media
#endif // MEDIA_MIDI_USB_MIDI_DESCRIPTOR_PARSER_H_
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