blob: 888e972d94ccd2d9ab4a5863faac722feac912cd [file] [log] [blame]
// Copyright 2013 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.
#include <stddef.h>
#include <stdint.h>
#include <deque>
#include <vector>
#include "media/midi/midi_export.h"
namespace midi {
// Returns the length of a MIDI message in bytes. Never returns 4 or greater.
// Returns 0 if |status_byte| is:
// - not a valid status byte, namely data byte.
// - MIDI System Exclusive message.
// - End of System Exclusive message.
// - Reserved System Common Message (0xf4, 0xf5)
MIDI_EXPORT size_t GetMessageLength(uint8_t status_byte);
// Checks if the specified byte is a valid data byte.
MIDI_EXPORT bool IsDataByte(uint8_t data);
// Checks if the specified byte is a valid system real time message.
MIDI_EXPORT bool IsSystemRealTimeMessage(uint8_t data);
// Checks if the specified byte is a valid system message.
MIDI_EXPORT bool IsSystemMessage(uint8_t data);
// Checks if |data| fulfills the requirements of MidiOutput.send API that is
// defined in the Web MIDI spec.
// - |data| must be any number of complete MIDI messages (data abbreviation
// called "running status" is disallowed).
// - 1-byte MIDI realtime messages can be placed at any position of |data|.
MIDI_EXPORT bool IsValidWebMIDIData(const std::vector<uint8_t>& data);
const uint8_t kSysExByte = 0xf0;
const uint8_t kEndOfSysExByte = 0xf7;
const uint8_t kSysMessageBitMask = 0xf0;
const uint8_t kSysMessageBitPattern = 0xf0;
const uint8_t kSysRTMessageBitMask = 0xf8;
const uint8_t kSysRTMessageBitPattern = 0xf8;
} // namespace midi