diff options
Diffstat (limited to 'chromium/media/midi/usb_midi_descriptor_parser.h')
-rw-r--r-- | chromium/media/midi/usb_midi_descriptor_parser.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/chromium/media/midi/usb_midi_descriptor_parser.h b/chromium/media/midi/usb_midi_descriptor_parser.h new file mode 100644 index 00000000000..826a449ef6e --- /dev/null +++ b/chromium/media/midi/usb_midi_descriptor_parser.h @@ -0,0 +1,60 @@ +// 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_ |