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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_OUTPUT_STREAM_H_
#define MEDIA_MIDI_USB_MIDI_OUTPUT_STREAM_H_
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "base/macros.h"
#include "media/midi/usb_midi_export.h"
#include "media/midi/usb_midi_jack.h"
namespace media {
namespace midi {
// UsbMidiOutputStream converts MIDI data to USB-MIDI data.
// See "USB Device Class Definition for MIDI Devices" Release 1.0,
// Section 4 "USB-MIDI Event Packets" for details.
class USB_MIDI_EXPORT UsbMidiOutputStream {
public:
explicit UsbMidiOutputStream(const UsbMidiJack& jack);
// Converts |data| to USB-MIDI data and send it to the jack.
void Send(const std::vector<uint8_t>& data);
const UsbMidiJack& jack() const { return jack_; }
private:
size_t GetSize(const std::vector<uint8_t>& data) const;
uint8_t Get(const std::vector<uint8_t>& data, size_t index) const;
bool PushSysExMessage(const std::vector<uint8_t>& data,
size_t* current,
std::vector<uint8_t>* data_to_send);
bool PushSysCommonMessage(const std::vector<uint8_t>& data,
size_t* current,
std::vector<uint8_t>* data_to_send);
void PushSysRTMessage(const std::vector<uint8_t>& data,
size_t* current,
std::vector<uint8_t>* data_to_send);
bool PushChannelMessage(const std::vector<uint8_t>& data,
size_t* current,
std::vector<uint8_t>* data_to_send);
static const size_t kPacketContentSize = 3;
UsbMidiJack jack_;
size_t pending_size_;
uint8_t pending_data_[kPacketContentSize];
bool is_sending_sysex_;
DISALLOW_COPY_AND_ASSIGN(UsbMidiOutputStream);
};
} // namespace midi
} // namespace media
#endif // MEDIA_MIDI_USB_MIDI_OUTPUT_STREAM_H_
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