| // Copyright 2014 The Chromium Authors |
| // 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 "media/midi/usb_midi_export.h" |
| #include "media/midi/usb_midi_jack.h" |
| |
| 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); |
| |
| UsbMidiOutputStream(const UsbMidiOutputStream&) = delete; |
| UsbMidiOutputStream& operator=(const UsbMidiOutputStream&) = delete; |
| |
| // 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_; |
| }; |
| |
| } // namespace midi |
| |
| #endif // MEDIA_MIDI_USB_MIDI_OUTPUT_STREAM_H_ |