├── node ├── node_module.cc ├── binding.gyp ├── midi │ ├── makefile │ ├── midi_note.h │ ├── main.cc │ ├── midi_connection.h │ ├── midi_note.cc │ ├── midi_sequencer.h │ ├── midi_connection.cc │ └── midi_sequencer.cc ├── node_sequence.h ├── midi.js └── node_sequence.cc ├── .gitignore ├── web ├── index.html ├── js │ ├── main.js │ └── vendor │ │ ├── modernizr-2.6.2.min.js │ │ └── jquery-1.10.2.min.js └── css │ ├── main.css │ └── normalize.css └── README.md /node/node_module.cc: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | #include "node_sequence.h" 4 | 5 | void InitAll(v8::Handle exports) { 6 | Sequence::Init(exports); 7 | } 8 | 9 | NODE_MODULE(midi, InitAll) 10 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files 2 | *.slo 3 | *.lo 4 | *.out 5 | *.o 6 | 7 | # Compiled Dynamic libraries 8 | *.so 9 | *.dylib 10 | 11 | # Compiled Static libraries 12 | *.lai 13 | *.la 14 | *.a 15 | 16 | node_modules 17 | build 18 | -------------------------------------------------------------------------------- /node/binding.gyp: -------------------------------------------------------------------------------- 1 | { 2 | "targets": [ 3 | { 4 | "target_name": "midi", 5 | "sources": [ 6 | "midi/midi_connection.cc", 7 | "midi/midi_note.cc", 8 | "midi/midi_sequencer.cc", 9 | "node_module.cc", 10 | "node_sequence.cc" 11 | ], 12 | "libraries": [ 13 | "-lasound" 14 | ], 15 | } 16 | ] 17 | } 18 | -------------------------------------------------------------------------------- /node/midi/makefile: -------------------------------------------------------------------------------- 1 | # IMPORTANT 2 | # Use this makefile only when testing this MIDI component individually. 3 | # For building the node library use node-gyp. 4 | CC=g++ 5 | CFLAGS=-g 6 | LDFLAGS=-lasound 7 | SOURCES=main.cc midi_connection.cc midi_sequencer.cc midi_note.cc 8 | OBJECTS=$(SOURCES:.cpp=.o) 9 | EXECUTABLE=sequencerpi.out 10 | 11 | all: $(SOURCES) $(EXECUTABLE) 12 | 13 | $(EXECUTABLE): $(OBJECTS) 14 | $(CC) $(OBJECTS) -o $@ $(LDFLAGS) 15 | 16 | .cpp.o: 17 | $(CC) $(CFLAGS) $< -o $@ 18 | 19 | clean: 20 | rm $(EXECUTABLE) 21 | -------------------------------------------------------------------------------- /node/midi/midi_note.h: -------------------------------------------------------------------------------- 1 | #ifndef SEQUENCERPI_MIDI_NOTE_H_ 2 | #define SEQUENCERPI_MIDI_NOTE_H_ 3 | 4 | #include 5 | 6 | #include "midi_connection.h" 7 | 8 | class MidiNote { 9 | public: 10 | MidiNote(); 11 | MidiNote(MidiConnection *, unsigned char, unsigned char); 12 | snd_seq_event_t note_on() const { return note_on_; } 13 | snd_seq_event_t note_off() const { return note_off_; } 14 | 15 | private: 16 | MidiConnection *connection_; 17 | snd_seq_event_t note_on_; 18 | snd_seq_event_t note_off_; 19 | char step_; 20 | }; 21 | 22 | #endif // SEQUENCERPI_MIDI_NOTE_H_ 23 | -------------------------------------------------------------------------------- /node/midi/main.cc: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | 4 | #include "midi_connection.h" 5 | #include "midi_sequencer.h" 6 | 7 | static MidiConnection *connection; 8 | static MidiSequencer *sequencer; 9 | 10 | // Tests the ALSA MIDI connection and sequencer. 11 | int main() { 12 | connection = new MidiConnection(20, 0); 13 | connection->CreateApplicationPort(); 14 | connection->SubscribeOutput(); 15 | 16 | sequencer = new MidiSequencer(connection); 17 | sequencer->CreateEventQueue(); 18 | 19 | sequencer->AddNote(0, 0); 20 | sequencer->AddNote(3, 0); 21 | sequencer->AddNote(5, 1); 22 | sequencer->Play(); 23 | 24 | getchar(); 25 | delete sequencer; 26 | delete connection; 27 | return 0; 28 | } 29 | -------------------------------------------------------------------------------- /node/node_sequence.h: -------------------------------------------------------------------------------- 1 | #ifndef NODE_SEQUENCE_H_ 2 | #define NODE_SEQUENCE_H_ 3 | 4 | #include 5 | 6 | #include "midi/midi_connection.h" 7 | #include "midi/midi_sequencer.h" 8 | 9 | // Wrapper class for the MIDI ALSA Sequencer interface. Allows node.js to 10 | // interact with ALSA through JavaScript, it will forward all logic to 11 | // midi_sequencer.cc. 12 | class Sequence : public node::ObjectWrap { 13 | public: 14 | static void Init(v8::Handle exports); 15 | 16 | private: 17 | Sequence(); 18 | ~Sequence(); 19 | static v8::Handle New(const v8::Arguments& args); 20 | static v8::Handle AddNote(const v8::Arguments& args); 21 | static v8::Handle RemoveNote(const v8::Arguments& args); 22 | static v8::Handle Clear(const v8::Arguments& args); 23 | static v8::Handle Play(const v8::Arguments& args); 24 | static v8::Handle Stop(const v8::Arguments& args); 25 | 26 | MidiConnection *connection_; 27 | MidiSequencer *sequencer_; 28 | }; 29 | 30 | #endif // NODE_SEQUENCE_H_ 31 | -------------------------------------------------------------------------------- /node/midi/midi_connection.h: -------------------------------------------------------------------------------- 1 | #ifndef SEQUENCERPI_MIDI_CONNECTION_H_ 2 | #define SEQUENCERPI_MIDI_CONNECTION_H_ 3 | 4 | #include 5 | 6 | class MidiConnection { 7 | public: 8 | MidiConnection(); 9 | MidiConnection(int, int); 10 | // Creates an application port for us to read and write from a MIDI device. 11 | void CreateApplicationPort(); 12 | // Subscribe to a MIDI device to read events from it. 13 | int SubscribeInput(); 14 | // Subscribe to a MIDI device to write events to it. 15 | int SubscribeOutput(); 16 | // Getter methods. 17 | snd_seq_t* sequencer() const { return sequencer_; } 18 | int application_client() const { return application_client_; } 19 | int application_port() const { return application_port_; } 20 | int device_client() const { return device_client_; } 21 | int device_port() const { return device_port_; } 22 | 23 | private: 24 | snd_seq_t *sequencer_; 25 | int application_client_; 26 | int application_port_; 27 | int device_client_; 28 | int device_port_; 29 | }; 30 | 31 | #endif // SEQUENCERPI_MIDI_CONNECTION_H_ 32 | -------------------------------------------------------------------------------- /node/midi/midi_note.cc: -------------------------------------------------------------------------------- 1 | #include "midi_note.h" 2 | 3 | static const int kMidiThroughClient = 14; 4 | 5 | MidiNote::MidiNote(MidiConnection *connection, 6 | unsigned char note, 7 | unsigned char velocity) { 8 | connection_ = connection; 9 | // Create note ON event. 10 | snd_seq_ev_clear(¬e_on_); 11 | snd_seq_ev_set_source(¬e_on_, connection_->application_port()); 12 | snd_seq_ev_set_dest(¬e_on_, kMidiThroughClient, 0); 13 | snd_seq_ev_set_fixed(¬e_on_); 14 | note_on_.type = SND_SEQ_EVENT_NOTEON; 15 | note_on_.data.note.channel = 0; 16 | note_on_.data.note.note = note; 17 | note_on_.data.note.velocity = velocity; 18 | // Create note OFF event. 19 | snd_seq_ev_clear(¬e_off_); 20 | snd_seq_ev_set_source(¬e_off_, connection_->application_port()); 21 | snd_seq_ev_set_dest(¬e_off_, kMidiThroughClient, 0); 22 | snd_seq_ev_set_fixed(¬e_off_); 23 | note_off_.type = SND_SEQ_EVENT_NOTEOFF; 24 | note_off_.data.note.channel = 0; 25 | note_off_.data.note.note = note; 26 | note_off_.data.note.velocity = velocity; 27 | } 28 | -------------------------------------------------------------------------------- /web/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | SequencerPi 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 21 | 22 |

SequencerPi

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27 | 28 | 29 | 30 | 31 | 32 | -------------------------------------------------------------------------------- /node/midi/midi_sequencer.h: -------------------------------------------------------------------------------- 1 | #ifndef SEQUENCERPI_MIDI_SEQUENCER_H_ 2 | #define SEQUENCERPI_MIDI_SEQUENCER_H_ 3 | 4 | #include 5 | 6 | #include "midi_connection.h" 7 | #include "midi_note.h" 8 | 9 | static const int kNoteMatrixSteps = 16; 10 | static const int kNoteMatrixNotes = 16; 11 | 12 | class MidiSequencer { 13 | public: 14 | MidiSequencer(); 15 | MidiSequencer(MidiConnection *); 16 | ~MidiSequencer(); 17 | // Creates the event queue for scheduling notes, etc. 18 | int CreateEventQueue(); 19 | // Function that writes a MidiNote to the note matrix. It takes the matrix 20 | // x and y as arguments, basically, which position the note in time and pitch 21 | // relative to the base note. 22 | void AddNote(char, char); 23 | // Removes a note from the note matrix given its sequencer coordinates. 24 | void RemoveNote(char, char); 25 | // Transfers the note matrix into the queue to schedule note on and off 26 | // MIDI events. This will happen every time the sequence has to begin again. 27 | void ScheduleSequence(); 28 | void ClearSequence(); 29 | // Playback control methods. 30 | void Play(); 31 | void Stop(); 32 | 33 | private: 34 | MidiConnection *connection_; 35 | int queue_; 36 | int bpm_; 37 | snd_seq_tick_time_t tick_; 38 | MidiNote *note_matrix_[kNoteMatrixSteps][kNoteMatrixNotes]; 39 | }; 40 | 41 | #endif // SEQUENCERPI_MIDI_SEQUENCER_H_ 42 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | SequencerPi 2 | =========== 3 | 4 | This library, at the highest level, consists of an interface between a MIDI synthesizer and a web browser using a RaspberryPi as the middleware that serves both MIDI messages to the synthesizer and HTTP messages to the browser. It allows the user to create, play, edit and loop a sequence of notes using a button matrix. 5 | 6 | ## Layers 7 | 8 | SequencerPi consists of 3 main layers: 9 | 10 | 1. JavaScript user interface: Displays the interactive panel in a simple HTML file and sends HTTP requests through socket.io to the nodejs server notifying any note addition, removal or playback changes. 11 | 2. Nodejs server: Connects to the JS interface using a simple HTTP server and socket.io and to the MIDI library using a custom node C++ module. 12 | 3. C++ ALSA MIDI library: Handles all the sequencing, queueing and messaging logic between the Linux ALSA and the MIDI device connected to the Raspberry Pi. 13 | 14 | ![sequencerpi diagram](http://i.imgur.com/5RKBfaV.png) 15 | 16 | ## Requirements 17 | 18 | This library can be compiled in a RaspberryPi running a Linux distribution like xbian or raspbian. The required packages for compilation are: 19 | 20 | * node 21 | * node-gyp (install with `npm`) 22 | * socket.io (install with `npm`) 23 | * libasound2-dev 24 | 25 | To build the node module, use the following command in the `node/` directory. 26 | 27 | node-gyp configure build 28 | 29 | This will generate the required libraries to run the nodejs server. 30 | 31 | ## Usage 32 | 33 | To test, connect a MIDI synthesizer device (USB or using a USB MIDI interface) to a RaspberryPi and run the nodejs server. 34 | 35 | node midi.js 36 | 37 | After this, navigate to http://localhost:8080, write a sequence using the button controls and hit Play. Events will be fired to the MIDI device. 38 | -------------------------------------------------------------------------------- /node/midi/midi_connection.cc: -------------------------------------------------------------------------------- 1 | #include "midi_connection.h" 2 | 3 | static const int kMidiThroughClientNumber = 14; 4 | static const char* kClientName = "SequencerPi"; 5 | 6 | MidiConnection::MidiConnection(int device_client, int device_port) 7 | : device_client_(device_client), 8 | device_port_(device_port) {} 9 | 10 | void MidiConnection::CreateApplicationPort() { 11 | snd_seq_open(&sequencer_, "default", SND_SEQ_OPEN_DUPLEX, 0); 12 | snd_seq_set_client_name(sequencer_, kClientName); 13 | application_client_ = snd_seq_client_id(sequencer_); 14 | application_port_ = snd_seq_create_simple_port( 15 | sequencer_, 16 | kClientName, 17 | SND_SEQ_PORT_CAP_READ 18 | | SND_SEQ_PORT_CAP_SUBS_READ 19 | | SND_SEQ_PORT_CAP_WRITE 20 | | SND_SEQ_PORT_CAP_SUBS_WRITE, 21 | SND_SEQ_PORT_TYPE_APPLICATION); 22 | } 23 | 24 | int MidiConnection::SubscribeInput() { 25 | assert(sequencer_ && "Application port not initialized."); 26 | snd_seq_addr_t sender, dest; 27 | snd_seq_port_subscribe_t *subs; 28 | sender.client = device_client_; 29 | sender.port = device_port_; 30 | dest.client = application_client_; 31 | dest.port = 0; 32 | snd_seq_port_subscribe_alloca(&subs); 33 | snd_seq_port_subscribe_set_sender(subs, &sender); 34 | snd_seq_port_subscribe_set_dest(subs, &dest); 35 | snd_seq_port_subscribe_set_queue(subs, 1); 36 | snd_seq_port_subscribe_set_time_update(subs, 1); 37 | snd_seq_port_subscribe_set_time_real(subs, 1); 38 | if (!snd_seq_subscribe_port(sequencer_, subs)) { 39 | return -errno; 40 | } 41 | return 1; 42 | } 43 | 44 | int MidiConnection::SubscribeOutput() { 45 | assert(sequencer_ && "Application port not initialized."); 46 | snd_seq_addr_t sender, dest; 47 | snd_seq_port_subscribe_t *subs; 48 | sender.client = kMidiThroughClientNumber; 49 | sender.port = 0; 50 | dest.client = device_client_; 51 | dest.port = device_port_; 52 | snd_seq_port_subscribe_alloca(&subs); 53 | snd_seq_port_subscribe_set_sender(subs, &sender); 54 | snd_seq_port_subscribe_set_dest(subs, &dest); 55 | if (!snd_seq_subscribe_port(sequencer_, subs)) { 56 | return -errno; 57 | } 58 | return 1; 59 | } 60 | -------------------------------------------------------------------------------- /node/midi.js: -------------------------------------------------------------------------------- 1 | var app = require('http').createServer(httpHandler) 2 | var io = require('socket.io').listen(app) 3 | var fs = require('fs') 4 | var midi = require('./build/Release/midi'); 5 | 6 | // HTTP web server will listen on port 8080 to avoid running as root. 7 | app.listen(8080); 8 | // The MIDI sequencer will communicate with the device on port 20 by default. 9 | var sequence = new midi.Sequence(20); 10 | 11 | // Simple web server implementation. 12 | // Receives requests from socket.io and responds with the appropiate file from 13 | // the web directory. This will only serve simple static pages, CSS 14 | // and JS files. 15 | function httpHandler(req, res) { 16 | var filename = (req.url == '/') ? 'index.html' : req.url; 17 | fs.readFile(__dirname + '/../web/' + filename, 18 | function (err, data) { 19 | if (err) { 20 | res.writeHead(500); 21 | return res.end('Error loading ' + filename); 22 | } 23 | res.writeHead(200); 24 | res.end(data); 25 | }); 26 | } 27 | 28 | // Socket connection and message handlers. 29 | io.sockets.on('connection', function(socket) { 30 | // Emit 'online' status when client is connected to acknowledge the channel. 31 | socket.emit('online', null); 32 | 33 | // Clear the sequencer when a new web session is initiated. Naturally, only 34 | // one sequencer can run at a time. 35 | socket.on('client_online', function(data) { 36 | console.log("Web sequencer online."); 37 | sequence.clear(); 38 | }); 39 | 40 | // Adds a note to the sequence. 41 | socket.on('note_add', function(data) { 42 | console.log("Adding note: " + data.note + " step: " + data.step); 43 | sequence.addNote(parseInt(data.note), parseInt(data.step)); 44 | }); 45 | 46 | // Removes a note from the sequence. 47 | socket.on('note_remove', function(data) { 48 | console.log("Removing note: " + data.note + " step: " + data.step); 49 | sequence.removeNote(parseInt(data.note), parseInt(data.step)); 50 | }); 51 | 52 | // Plays the sequence with the current configured MIDI notes. 53 | socket.on('play', function(data) { 54 | console.log("Playing sequence."); 55 | sequence.play(); 56 | }); 57 | 58 | // Stops playback. 59 | socket.on('stop', function(data) { 60 | console.log("Stopping sequence."); 61 | sequence.stop(); 62 | }); 63 | 64 | // Loops the current sequence and plays again. 65 | socket.on('loop', function(data) { 66 | sequence.stop(); 67 | sequence.play(); 68 | }); 69 | }); 70 | -------------------------------------------------------------------------------- /node/node_sequence.cc: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | #include "node_sequence.h" 4 | 5 | Sequence::Sequence() {}; 6 | Sequence::~Sequence() {}; 7 | 8 | void Sequence::Init(v8::Handle exports) { 9 | // Prepare constructor template. 10 | v8::Local tpl = v8::FunctionTemplate::New(New); 11 | tpl->SetClassName(v8::String::NewSymbol("Sequence")); 12 | tpl->InstanceTemplate()->SetInternalFieldCount(2); 13 | // Prototype 14 | tpl->PrototypeTemplate()->Set(v8::String::NewSymbol("addNote"), 15 | v8::FunctionTemplate::New(AddNote)->GetFunction()); 16 | tpl->PrototypeTemplate()->Set(v8::String::NewSymbol("removeNote"), 17 | v8::FunctionTemplate::New(RemoveNote)->GetFunction()); 18 | tpl->PrototypeTemplate()->Set(v8::String::NewSymbol("clear"), 19 | v8::FunctionTemplate::New(Clear)->GetFunction()); 20 | tpl->PrototypeTemplate()->Set(v8::String::NewSymbol("play"), 21 | v8::FunctionTemplate::New(Play)->GetFunction()); 22 | tpl->PrototypeTemplate()->Set(v8::String::NewSymbol("stop"), 23 | v8::FunctionTemplate::New(Stop)->GetFunction()); 24 | 25 | v8::Persistent constructor = 26 | v8::Persistent::New(tpl->GetFunction()); 27 | exports->Set(v8::String::NewSymbol("Sequence"), constructor); 28 | } 29 | 30 | v8::Handle Sequence::New(const v8::Arguments& args) { 31 | v8::HandleScope scope; 32 | 33 | Sequence* seq = new Sequence(); 34 | if (args[0]->IsNumber()) { 35 | int client = args[0]->Int32Value(); 36 | 37 | seq->connection_ = new MidiConnection(client, 0); 38 | seq->connection_->CreateApplicationPort(); 39 | seq->connection_->SubscribeOutput(); 40 | 41 | seq->sequencer_ = new MidiSequencer(seq->connection_); 42 | seq->sequencer_->CreateEventQueue(); 43 | } 44 | seq->Wrap(args.This()); 45 | 46 | return args.This(); 47 | } 48 | 49 | v8::Handle Sequence::AddNote(const v8::Arguments& args) { 50 | v8::HandleScope scope; 51 | Sequence* seq = ObjectWrap::Unwrap(args.This()); 52 | 53 | if (args[0]->IsNumber() && args[1]->IsNumber()) { 54 | int note = args[0]->Int32Value(); 55 | int step = args[1]->Int32Value(); 56 | seq->sequencer_->AddNote(note, step); 57 | } 58 | 59 | return scope.Close(v8::Undefined()); 60 | } 61 | 62 | v8::Handle Sequence::RemoveNote(const v8::Arguments& args) { 63 | v8::HandleScope scope; 64 | Sequence* seq = ObjectWrap::Unwrap(args.This()); 65 | 66 | if (args[0]->IsNumber() && args[1]->IsNumber()) { 67 | int note = args[0]->Int32Value(); 68 | int step = args[1]->Int32Value(); 69 | seq->sequencer_->RemoveNote(note, step); 70 | } 71 | 72 | return scope.Close(v8::Undefined()); 73 | } 74 | 75 | v8::Handle Sequence::Clear(const v8::Arguments& args) { 76 | v8::HandleScope scope; 77 | Sequence* seq = ObjectWrap::Unwrap(args.This()); 78 | seq->sequencer_->ClearSequence(); 79 | return scope.Close(v8::Undefined()); 80 | } 81 | 82 | v8::Handle Sequence::Play(const v8::Arguments& args) { 83 | v8::HandleScope scope; 84 | Sequence* seq = ObjectWrap::Unwrap(args.This()); 85 | seq->sequencer_->Play(); 86 | return scope.Close(v8::Undefined()); 87 | } 88 | 89 | v8::Handle Sequence::Stop(const v8::Arguments& args) { 90 | v8::HandleScope scope; 91 | Sequence* seq = ObjectWrap::Unwrap(args.This()); 92 | seq->sequencer_->Stop(); 93 | return scope.Close(v8::Undefined()); 94 | } 95 | -------------------------------------------------------------------------------- /node/midi/midi_sequencer.cc: -------------------------------------------------------------------------------- 1 | #include "midi_sequencer.h" 2 | 3 | // The default tempo in BPM for the sequencer. 4 | static const int kDefaultBPM = 120; 5 | // The base note (C4). All other notes will be relative to this one. 6 | static const unsigned char kBaseNote = 60; 7 | // Ticks per quarter. 8 | static const int kPPQ = 96; 9 | 10 | MidiSequencer::MidiSequencer(MidiConnection *connection) 11 | : connection_(connection) { 12 | bpm_ = kDefaultBPM; 13 | tick_ = 0; 14 | for (int s = 0; s < kNoteMatrixSteps; s++) { 15 | for (int n = 0; n < kNoteMatrixNotes; n++) { 16 | note_matrix_[s][n] = NULL; 17 | } 18 | } 19 | } 20 | 21 | MidiSequencer::~MidiSequencer() { 22 | if (queue_ >= 0) { 23 | snd_seq_free_queue(connection_->sequencer(), queue_); 24 | } 25 | } 26 | 27 | int MidiSequencer::CreateEventQueue() { 28 | queue_ = snd_seq_alloc_queue(connection_->sequencer()); 29 | // Set default queue tempo. 30 | snd_seq_queue_tempo_t *tempo; 31 | snd_seq_queue_tempo_alloca(&tempo); 32 | snd_seq_queue_tempo_set_tempo(tempo, 60 * 1000000 / bpm_); 33 | snd_seq_queue_tempo_set_ppq(tempo, kPPQ); 34 | snd_seq_set_queue_tempo(connection_->sequencer(), queue_, tempo); 35 | return 1; 36 | } 37 | 38 | void MidiSequencer::AddNote(char note, char step) { 39 | assert((queue_ >= 0) && "Event queue not initialized."); 40 | if (note > kNoteMatrixNotes || step > kNoteMatrixSteps) return; 41 | if (note < 0 || step < 0) return; 42 | 43 | MidiNote *midi_note = new MidiNote(connection_, kBaseNote + note, 127); 44 | note_matrix_[(int)step][(int)note] = midi_note; 45 | } 46 | 47 | void MidiSequencer::RemoveNote(char note, char step) { 48 | assert((queue_ >= 0) && "Event queue not initialized."); 49 | if (note > kNoteMatrixNotes || step > kNoteMatrixSteps) return; 50 | if (note < 0 || step < 0) return; 51 | 52 | MidiNote *midi_note = note_matrix_[(int)step][(int)note]; 53 | if (midi_note) { 54 | delete midi_note; 55 | note_matrix_[(int)step][(int)note] = NULL; 56 | } 57 | } 58 | 59 | void MidiSequencer::ScheduleSequence() { 60 | for (int s = 0; s < kNoteMatrixSteps; s++) { 61 | for (int n = 0; n < kNoteMatrixNotes; n++) { 62 | MidiNote *note = note_matrix_[s][n]; 63 | if (note) { 64 | // Schedule both note ON and note OFF events. The note duration will be 65 | // exactly one 16th note. 66 | snd_seq_event_t note_on = note->note_on(); 67 | snd_seq_ev_schedule_tick(¬e_on, queue_, 0, tick_); 68 | snd_seq_event_output_direct(connection_->sequencer(), ¬e_on); 69 | snd_seq_event_t note_off = note->note_off(); 70 | snd_seq_ev_schedule_tick(¬e_off, queue_, 0, tick_ + kPPQ / 4); 71 | snd_seq_event_output_direct(connection_->sequencer(), ¬e_off); 72 | } 73 | } 74 | tick_ += kPPQ / 4; 75 | } 76 | } 77 | 78 | void MidiSequencer::ClearSequence() { 79 | for (int s = 0; s < kNoteMatrixSteps; s++) { 80 | for (int n = 0; n < kNoteMatrixNotes; n++) { 81 | MidiNote *midi_note = note_matrix_[s][n]; 82 | if (midi_note) { 83 | delete midi_note; 84 | } 85 | note_matrix_[s][n] = NULL; 86 | } 87 | } 88 | if (queue_ >= 0) { 89 | snd_seq_remove_events_t *remove_ev; 90 | snd_seq_remove_events_malloc(&remove_ev); 91 | snd_seq_remove_events_set_queue(remove_ev, queue_); 92 | snd_seq_remove_events_set_condition( 93 | remove_ev, 94 | SND_SEQ_REMOVE_OUTPUT | SND_SEQ_REMOVE_IGNORE_OFF); 95 | snd_seq_remove_events(connection_->sequencer(), remove_ev); 96 | snd_seq_remove_events_free(remove_ev); 97 | } 98 | } 99 | 100 | void MidiSequencer::Play() { 101 | assert((queue_ >= 0) && "Event queue not initialized."); 102 | snd_seq_start_queue(connection_->sequencer(), queue_, NULL); 103 | snd_seq_drain_output(connection_->sequencer()); 104 | ScheduleSequence(); 105 | } 106 | 107 | void MidiSequencer::Stop() { 108 | assert((queue_ >= 0) && "Event queue not initialized."); 109 | tick_ = 0; 110 | snd_seq_stop_queue(connection_->sequencer(), queue_, NULL); 111 | snd_seq_drain_output(connection_->sequencer()); 112 | } 113 | -------------------------------------------------------------------------------- /web/js/main.js: -------------------------------------------------------------------------------- 1 | // Sequencer class. 2 | // Creates the sequencer button grid and adds all listeners and handlers 3 | // necessary for communicating with the MIDI backend. All communications are 4 | // done via AJAX TCP requests. 5 | function Sequencer() { 6 | this._bpm = 120; 7 | this._matrixNotes = 16; 8 | this._matrixSteps = 16; 9 | this._activeStep = 0; 10 | this._playheadTimeout = null; 11 | this._buttonWidth = 40; 12 | this._buttonMargin = 10; 13 | this._socket = io.connect('http://localhost:8080'); 14 | 15 | this.attachSocketHandlers(); 16 | }; 17 | 18 | // Defines the main functionality of the Socket IO connection. 19 | Sequencer.prototype.attachSocketHandlers = function() { 20 | var ctx = this; 21 | // ACK established connection to build ALSA sequencer on the backend and 22 | // button grid on the frontend. 23 | this._socket.on('online', function(data) { 24 | ctx.buildSequencer(); 25 | ctx._socket.emit('client_online', null); 26 | }); 27 | }; 28 | 29 | // Creates the button matrix using divs with absolute positioning. 30 | Sequencer.prototype.buildSequencer = function() { 31 | // Don't build stuff again if it's already built, just clear notes, etc. 32 | if ($('#matrix').children().length > 0) { 33 | $('.button').removeClass('active'); 34 | this.playHandler(); 35 | return; 36 | } 37 | // Create buttons. 38 | for (var step = 0; step < this._matrixSteps; step++) { 39 | for (var note = 0; note < this._matrixNotes; note++) { 40 | var button = $('
 
'); 41 | 42 | // Style variations depending on column, position according to note 43 | // and step. 44 | button.addClass('button'); 45 | if (step % 4 == 0) { // Strong beat should be different style. 46 | button.addClass('strong'); 47 | } 48 | if ($.inArray(note % 12, [1, 3, 6, 8, 10]) >= 0) { 49 | button.addClass('semitone'); 50 | } 51 | var left = step * this._buttonWidth + step * this._buttonMargin; 52 | var bottom = note * this._buttonWidth + note * this._buttonMargin; 53 | button.css('width', this._buttonWidth + 'px'); 54 | button.css('height', this._buttonWidth + 'px'); 55 | button.css('left', left + 'px'); 56 | button.css('bottom', bottom + 'px'); 57 | 58 | // Data attributes need to be recorded for future use. 59 | button.attr('data-step', step); 60 | button.attr('data-note', note); 61 | $('#matrix').append(button); 62 | 63 | // Add listeners. 64 | button.click(this.buttonHandler); 65 | } 66 | } 67 | // Configure matrix container dimensions. 68 | var matrixHeight = this._matrixNotes * this._buttonWidth 69 | + (this._matrixNotes - 1) * this._buttonMargin 70 | + 5; 71 | $('#matrix').css('height', matrixHeight); 72 | 73 | // Attach other action listeners. 74 | $('#run').click(this.playHandler); 75 | }; 76 | 77 | // Button click handler. Sends the appropiate request to add or remove a 78 | // MIDI note from the sequence in real time. 79 | Sequencer.prototype.buttonHandler = function(event) { 80 | var note = $(this).attr('data-note'); 81 | var step = $(this).attr('data-step'); 82 | 83 | if (!$(this).hasClass('active')) { 84 | console.log("Adding note: " + note + " step: " + step); 85 | window.sequencer._socket.emit( 86 | 'note_add', 87 | { 'note': note, 'step': step }); 88 | } else { 89 | console.log("Removing note: " + note + " step: " + step); 90 | window.sequencer._socket.emit( 91 | 'note_remove', 92 | { 'note': note, 'step': step }); 93 | } 94 | $(this).toggleClass('active'); 95 | }; 96 | 97 | // Play button click handler. Starts or stops the MIDI sequence. 98 | Sequencer.prototype.playHandler = function(event) { 99 | if (!$(this).hasClass('playing')) { 100 | console.log("Playing sequence."); 101 | window.sequencer._socket.emit('play', null); 102 | $(this).addClass('playing'); 103 | $(this).html("STOP"); 104 | window.sequencer.runPlayhead(); 105 | } else { 106 | console.log("Stopping sequence."); 107 | window.sequencer._socket.emit('stop', null); 108 | $(this).removeClass('playing'); 109 | $(this).html("PLAY"); 110 | window.sequencer.stopPlayhead(); 111 | } 112 | }; 113 | 114 | Sequencer.prototype.runPlayhead = function() { 115 | $('.button.playhead').removeClass('playhead'); 116 | $('.button[data-step="' + this._activeStep + '"]').addClass('playhead'); 117 | 118 | // If we are on the last step, issue a restart to the sequencer to loop the 119 | // current sequence. 120 | if (this._activeStep == this._matrixSteps - 1) { 121 | window.sequencer._socket.emit('loop', null); 122 | } 123 | this._activeStep = (this._activeStep + 1) % this._matrixSteps; 124 | 125 | this._playheadTimeout = setTimeout( 126 | function() { window.sequencer.runPlayhead() }, 127 | 1000 / (this._bpm / 60 * 4)); 128 | }; 129 | 130 | Sequencer.prototype.stopPlayhead = function() { 131 | clearTimeout(this._playheadTimeout); 132 | $('.button.playhead').removeClass('playhead'); 133 | this._activeStep = 0; 134 | }; 135 | 136 | $(document).ready(function() { 137 | window.sequencer = new Sequencer(); 138 | }); 139 | -------------------------------------------------------------------------------- /web/css/main.css: -------------------------------------------------------------------------------- 1 | /*! HTML5 Boilerplate v4.3.0 | MIT License | http://h5bp.com/ */ 2 | 3 | /* 4 | * What follows is the result of much research on cross-browser styling. 5 | * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal, 6 | * Kroc Camen, and the H5BP dev community and team. 7 | */ 8 | 9 | /* ========================================================================== 10 | Base styles: opinionated defaults 11 | ========================================================================== */ 12 | 13 | html, 14 | button, 15 | input, 16 | select, 17 | textarea { 18 | color: #222; 19 | } 20 | 21 | html { 22 | font-size: 1em; 23 | line-height: 1.4; 24 | } 25 | 26 | /* 27 | * Remove text-shadow in selection highlight: h5bp.com/i 28 | * These selection rule sets have to be separate. 29 | * Customize the background color to match your design. 30 | */ 31 | 32 | ::-moz-selection { 33 | background: #b3d4fc; 34 | text-shadow: none; 35 | } 36 | 37 | ::selection { 38 | background: #b3d4fc; 39 | text-shadow: none; 40 | } 41 | 42 | /* 43 | * A better looking default horizontal rule 44 | */ 45 | 46 | hr { 47 | display: block; 48 | height: 1px; 49 | border: 0; 50 | border-top: 1px solid #ccc; 51 | margin: 1em 0; 52 | padding: 0; 53 | } 54 | 55 | /* 56 | * Remove the gap between images, videos, audio and canvas and the bottom of 57 | * their containers: h5bp.com/i/440 58 | */ 59 | 60 | audio, 61 | canvas, 62 | img, 63 | video { 64 | vertical-align: middle; 65 | } 66 | 67 | /* 68 | * Remove default fieldset styles. 69 | */ 70 | 71 | fieldset { 72 | border: 0; 73 | margin: 0; 74 | padding: 0; 75 | } 76 | 77 | /* 78 | * Allow only vertical resizing of textareas. 79 | */ 80 | 81 | textarea { 82 | resize: vertical; 83 | } 84 | 85 | /* ========================================================================== 86 | Browse Happy prompt 87 | ========================================================================== */ 88 | 89 | .browsehappy { 90 | margin: 0.2em 0; 91 | background: #ccc; 92 | color: #000; 93 | padding: 0.2em 0; 94 | } 95 | 96 | /* ========================================================================== 97 | Author's custom styles 98 | ========================================================================== */ 99 | 100 | body { 101 | padding: 0 30px; 102 | } 103 | #matrix { 104 | position: relative; 105 | } 106 | .button { 107 | background-color: #ddecef; 108 | position: absolute; 109 | cursor: pointer; 110 | opacity: 0.7; 111 | } 112 | .button.active { 113 | background-color: #45d4db !important; 114 | opacity: 1.0; 115 | } 116 | .button.strong { 117 | background-color: #bfd9da; 118 | } 119 | .button.playhead { 120 | opacity: 1.0; 121 | } 122 | .button.active.playhead { 123 | background-color: #ff8114 !important; 124 | } 125 | 126 | /* ========================================================================== 127 | Helper classes 128 | ========================================================================== */ 129 | 130 | /* 131 | * Image replacement 132 | */ 133 | 134 | .ir { 135 | background-color: transparent; 136 | border: 0; 137 | overflow: hidden; 138 | /* IE 6/7 fallback */ 139 | *text-indent: -9999px; 140 | } 141 | 142 | .ir:before { 143 | content: ""; 144 | display: block; 145 | width: 0; 146 | height: 150%; 147 | } 148 | 149 | /* 150 | * Hide from both screenreaders and browsers: h5bp.com/u 151 | */ 152 | 153 | .hidden { 154 | display: none !important; 155 | visibility: hidden; 156 | } 157 | 158 | /* 159 | * Hide only visually, but have it available for screenreaders: h5bp.com/v 160 | */ 161 | 162 | .visuallyhidden { 163 | border: 0; 164 | clip: rect(0 0 0 0); 165 | height: 1px; 166 | margin: -1px; 167 | overflow: hidden; 168 | padding: 0; 169 | position: absolute; 170 | width: 1px; 171 | } 172 | 173 | /* 174 | * Extends the .visuallyhidden class to allow the element to be focusable 175 | * when navigated to via the keyboard: h5bp.com/p 176 | */ 177 | 178 | .visuallyhidden.focusable:active, 179 | .visuallyhidden.focusable:focus { 180 | clip: auto; 181 | height: auto; 182 | margin: 0; 183 | overflow: visible; 184 | position: static; 185 | width: auto; 186 | } 187 | 188 | /* 189 | * Hide visually and from screenreaders, but maintain layout 190 | */ 191 | 192 | .invisible { 193 | visibility: hidden; 194 | } 195 | 196 | /* 197 | * Clearfix: contain floats 198 | * 199 | * For modern browsers 200 | * 1. The space content is one way to avoid an Opera bug when the 201 | * `contenteditable` attribute is included anywhere else in the document. 202 | * Otherwise it causes space to appear at the top and bottom of elements 203 | * that receive the `clearfix` class. 204 | * 2. The use of `table` rather than `block` is only necessary if using 205 | * `:before` to contain the top-margins of child elements. 206 | */ 207 | 208 | .clearfix:before, 209 | .clearfix:after { 210 | content: " "; /* 1 */ 211 | display: table; /* 2 */ 212 | } 213 | 214 | .clearfix:after { 215 | clear: both; 216 | } 217 | 218 | /* 219 | * For IE 6/7 only 220 | * Include this rule to trigger hasLayout and contain floats. 221 | */ 222 | 223 | .clearfix { 224 | *zoom: 1; 225 | } 226 | 227 | /* ========================================================================== 228 | EXAMPLE Media Queries for Responsive Design. 229 | These examples override the primary ('mobile first') styles. 230 | Modify as content requires. 231 | ========================================================================== */ 232 | 233 | @media only screen and (min-width: 35em) { 234 | /* Style adjustments for viewports that meet the condition */ 235 | } 236 | 237 | @media print, 238 | (-o-min-device-pixel-ratio: 5/4), 239 | (-webkit-min-device-pixel-ratio: 1.25), 240 | (min-resolution: 120dpi) { 241 | /* Style adjustments for high resolution devices */ 242 | } 243 | 244 | /* ========================================================================== 245 | Print styles. 246 | Inlined to avoid required HTTP connection: h5bp.com/r 247 | ========================================================================== */ 248 | 249 | @media print { 250 | * { 251 | background: transparent !important; 252 | color: #000 !important; /* Black prints faster: h5bp.com/s */ 253 | box-shadow: none !important; 254 | text-shadow: none !important; 255 | } 256 | 257 | a, 258 | a:visited { 259 | text-decoration: underline; 260 | } 261 | 262 | a[href]:after { 263 | content: " (" attr(href) ")"; 264 | } 265 | 266 | abbr[title]:after { 267 | content: " (" attr(title) ")"; 268 | } 269 | 270 | /* 271 | * Don't show links for images, or javascript/internal links 272 | */ 273 | 274 | .ir a:after, 275 | a[href^="javascript:"]:after, 276 | a[href^="#"]:after { 277 | content: ""; 278 | } 279 | 280 | pre, 281 | blockquote { 282 | border: 1px solid #999; 283 | page-break-inside: avoid; 284 | } 285 | 286 | thead { 287 | display: table-header-group; /* h5bp.com/t */ 288 | } 289 | 290 | tr, 291 | img { 292 | page-break-inside: avoid; 293 | } 294 | 295 | img { 296 | max-width: 100% !important; 297 | } 298 | 299 | @page { 300 | margin: 0.5cm; 301 | } 302 | 303 | p, 304 | h2, 305 | h3 { 306 | orphans: 3; 307 | widows: 3; 308 | } 309 | 310 | h2, 311 | h3 { 312 | page-break-after: avoid; 313 | } 314 | } 315 | -------------------------------------------------------------------------------- /web/css/normalize.css: -------------------------------------------------------------------------------- 1 | /*! normalize.css v1.1.3 | MIT License | git.io/normalize */ 2 | 3 | /* ========================================================================== 4 | HTML5 display definitions 5 | ========================================================================== */ 6 | 7 | /** 8 | * Correct `block` display not defined in IE 6/7/8/9 and Firefox 3. 9 | */ 10 | 11 | article, 12 | aside, 13 | details, 14 | figcaption, 15 | figure, 16 | footer, 17 | header, 18 | hgroup, 19 | main, 20 | nav, 21 | section, 22 | summary { 23 | display: block; 24 | } 25 | 26 | /** 27 | * Correct `inline-block` display not defined in IE 6/7/8/9 and Firefox 3. 28 | */ 29 | 30 | audio, 31 | canvas, 32 | video { 33 | display: inline-block; 34 | *display: inline; 35 | *zoom: 1; 36 | } 37 | 38 | /** 39 | * Prevent modern browsers from displaying `audio` without controls. 40 | * Remove excess height in iOS 5 devices. 41 | */ 42 | 43 | audio:not([controls]) { 44 | display: none; 45 | height: 0; 46 | } 47 | 48 | /** 49 | * Address styling not present in IE 7/8/9, Firefox 3, and Safari 4. 50 | * Known issue: no IE 6 support. 51 | */ 52 | 53 | [hidden] { 54 | display: none; 55 | } 56 | 57 | /* ========================================================================== 58 | Base 59 | ========================================================================== */ 60 | 61 | /** 62 | * 1. Correct text resizing oddly in IE 6/7 when body `font-size` is set using 63 | * `em` units. 64 | * 2. Prevent iOS text size adjust after orientation change, without disabling 65 | * user zoom. 66 | */ 67 | 68 | html { 69 | font-size: 100%; /* 1 */ 70 | -ms-text-size-adjust: 100%; /* 2 */ 71 | -webkit-text-size-adjust: 100%; /* 2 */ 72 | } 73 | 74 | /** 75 | * Address `font-family` inconsistency between `textarea` and other form 76 | * elements. 77 | */ 78 | 79 | html, 80 | button, 81 | input, 82 | select, 83 | textarea { 84 | font-family: monospace; 85 | } 86 | 87 | /** 88 | * Address margins handled incorrectly in IE 6/7. 89 | */ 90 | 91 | body { 92 | margin: 0; 93 | } 94 | 95 | /* ========================================================================== 96 | Links 97 | ========================================================================== */ 98 | 99 | /** 100 | * Address `outline` inconsistency between Chrome and other browsers. 101 | */ 102 | 103 | a:focus { 104 | outline: thin dotted; 105 | } 106 | 107 | /** 108 | * Improve readability when focused and also mouse hovered in all browsers. 109 | */ 110 | 111 | a:active, 112 | a:hover { 113 | outline: 0; 114 | } 115 | 116 | /* ========================================================================== 117 | Typography 118 | ========================================================================== */ 119 | 120 | /** 121 | * Address font sizes and margins set differently in IE 6/7. 122 | * Address font sizes within `section` and `article` in Firefox 4+, Safari 5, 123 | * and Chrome. 124 | */ 125 | 126 | h1 { 127 | font-size: 2em; 128 | margin: 0.67em 0; 129 | } 130 | 131 | h2 { 132 | font-size: 1.5em; 133 | margin: 0.83em 0; 134 | } 135 | 136 | h3 { 137 | font-size: 1.17em; 138 | margin: 1em 0; 139 | } 140 | 141 | h4 { 142 | font-size: 1em; 143 | margin: 1.33em 0; 144 | } 145 | 146 | h5 { 147 | font-size: 0.83em; 148 | margin: 1.67em 0; 149 | } 150 | 151 | h6 { 152 | font-size: 0.67em; 153 | margin: 2.33em 0; 154 | } 155 | 156 | /** 157 | * Address styling not present in IE 7/8/9, Safari 5, and Chrome. 158 | */ 159 | 160 | abbr[title] { 161 | border-bottom: 1px dotted; 162 | } 163 | 164 | /** 165 | * Address style set to `bolder` in Firefox 3+, Safari 4/5, and Chrome. 166 | */ 167 | 168 | b, 169 | strong { 170 | font-weight: bold; 171 | } 172 | 173 | blockquote { 174 | margin: 1em 40px; 175 | } 176 | 177 | /** 178 | * Address styling not present in Safari 5 and Chrome. 179 | */ 180 | 181 | dfn { 182 | font-style: italic; 183 | } 184 | 185 | /** 186 | * Address differences between Firefox and other browsers. 187 | * Known issue: no IE 6/7 normalization. 188 | */ 189 | 190 | hr { 191 | -moz-box-sizing: content-box; 192 | box-sizing: content-box; 193 | height: 0; 194 | } 195 | 196 | /** 197 | * Address styling not present in IE 6/7/8/9. 198 | */ 199 | 200 | mark { 201 | background: #ff0; 202 | color: #000; 203 | } 204 | 205 | /** 206 | * Address margins set differently in IE 6/7. 207 | */ 208 | 209 | p, 210 | pre { 211 | margin: 1em 0; 212 | } 213 | 214 | /** 215 | * Correct font family set oddly in IE 6, Safari 4/5, and Chrome. 216 | */ 217 | 218 | code, 219 | kbd, 220 | pre, 221 | samp { 222 | font-family: monospace, serif; 223 | _font-family: 'courier new', monospace; 224 | font-size: 1em; 225 | } 226 | 227 | /** 228 | * Improve readability of pre-formatted text in all browsers. 229 | */ 230 | 231 | pre { 232 | white-space: pre; 233 | white-space: pre-wrap; 234 | word-wrap: break-word; 235 | } 236 | 237 | /** 238 | * Address CSS quotes not supported in IE 6/7. 239 | */ 240 | 241 | q { 242 | quotes: none; 243 | } 244 | 245 | /** 246 | * Address `quotes` property not supported in Safari 4. 247 | */ 248 | 249 | q:before, 250 | q:after { 251 | content: ''; 252 | content: none; 253 | } 254 | 255 | /** 256 | * Address inconsistent and variable font size in all browsers. 257 | */ 258 | 259 | small { 260 | font-size: 80%; 261 | } 262 | 263 | /** 264 | * Prevent `sub` and `sup` affecting `line-height` in all browsers. 265 | */ 266 | 267 | sub, 268 | sup { 269 | font-size: 75%; 270 | line-height: 0; 271 | position: relative; 272 | vertical-align: baseline; 273 | } 274 | 275 | sup { 276 | top: -0.5em; 277 | } 278 | 279 | sub { 280 | bottom: -0.25em; 281 | } 282 | 283 | /* ========================================================================== 284 | Lists 285 | ========================================================================== */ 286 | 287 | /** 288 | * Address margins set differently in IE 6/7. 289 | */ 290 | 291 | dl, 292 | menu, 293 | ol, 294 | ul { 295 | margin: 1em 0; 296 | } 297 | 298 | dd { 299 | margin: 0 0 0 40px; 300 | } 301 | 302 | /** 303 | * Address paddings set differently in IE 6/7. 304 | */ 305 | 306 | menu, 307 | ol, 308 | ul { 309 | padding: 0 0 0 40px; 310 | } 311 | 312 | /** 313 | * Correct list images handled incorrectly in IE 7. 314 | */ 315 | 316 | nav ul, 317 | nav ol { 318 | list-style: none; 319 | list-style-image: none; 320 | } 321 | 322 | /* ========================================================================== 323 | Embedded content 324 | ========================================================================== */ 325 | 326 | /** 327 | * 1. Remove border when inside `a` element in IE 6/7/8/9 and Firefox 3. 328 | * 2. Improve image quality when scaled in IE 7. 329 | */ 330 | 331 | img { 332 | border: 0; /* 1 */ 333 | -ms-interpolation-mode: bicubic; /* 2 */ 334 | } 335 | 336 | /** 337 | * Correct overflow displayed oddly in IE 9. 338 | */ 339 | 340 | svg:not(:root) { 341 | overflow: hidden; 342 | } 343 | 344 | /* ========================================================================== 345 | Figures 346 | ========================================================================== */ 347 | 348 | /** 349 | * Address margin not present in IE 6/7/8/9, Safari 5, and Opera 11. 350 | */ 351 | 352 | figure { 353 | margin: 0; 354 | } 355 | 356 | /* ========================================================================== 357 | Forms 358 | ========================================================================== */ 359 | 360 | /** 361 | * Correct margin displayed oddly in IE 6/7. 362 | */ 363 | 364 | form { 365 | margin: 0; 366 | } 367 | 368 | /** 369 | * Define consistent border, margin, and padding. 370 | */ 371 | 372 | fieldset { 373 | border: 1px solid #c0c0c0; 374 | margin: 0 2px; 375 | padding: 0.35em 0.625em 0.75em; 376 | } 377 | 378 | /** 379 | * 1. Correct color not being inherited in IE 6/7/8/9. 380 | * 2. Correct text not wrapping in Firefox 3. 381 | * 3. Correct alignment displayed oddly in IE 6/7. 382 | */ 383 | 384 | legend { 385 | border: 0; /* 1 */ 386 | padding: 0; 387 | white-space: normal; /* 2 */ 388 | *margin-left: -7px; /* 3 */ 389 | } 390 | 391 | /** 392 | * 1. Correct font size not being inherited in all browsers. 393 | * 2. Address margins set differently in IE 6/7, Firefox 3+, Safari 5, 394 | * and Chrome. 395 | * 3. Improve appearance and consistency in all browsers. 396 | */ 397 | 398 | button, 399 | input, 400 | select, 401 | textarea { 402 | font-size: 100%; /* 1 */ 403 | margin: 0; /* 2 */ 404 | vertical-align: baseline; /* 3 */ 405 | *vertical-align: middle; /* 3 */ 406 | } 407 | 408 | /** 409 | * Address Firefox 3+ setting `line-height` on `input` using `!important` in 410 | * the UA stylesheet. 411 | */ 412 | 413 | button, 414 | input { 415 | line-height: normal; 416 | } 417 | 418 | /** 419 | * Address inconsistent `text-transform` inheritance for `button` and `select`. 420 | * All other form control elements do not inherit `text-transform` values. 421 | * Correct `button` style inheritance in Chrome, Safari 5+, and IE 6+. 422 | * Correct `select` style inheritance in Firefox 4+ and Opera. 423 | */ 424 | 425 | button, 426 | select { 427 | text-transform: none; 428 | } 429 | 430 | /** 431 | * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio` 432 | * and `video` controls. 433 | * 2. Correct inability to style clickable `input` types in iOS. 434 | * 3. Improve usability and consistency of cursor style between image-type 435 | * `input` and others. 436 | * 4. Remove inner spacing in IE 7 without affecting normal text inputs. 437 | * Known issue: inner spacing remains in IE 6. 438 | */ 439 | 440 | button, 441 | html input[type="button"], /* 1 */ 442 | input[type="reset"], 443 | input[type="submit"] { 444 | -webkit-appearance: button; /* 2 */ 445 | cursor: pointer; /* 3 */ 446 | *overflow: visible; /* 4 */ 447 | } 448 | 449 | /** 450 | * Re-set default cursor for disabled elements. 451 | */ 452 | 453 | button[disabled], 454 | html input[disabled] { 455 | cursor: default; 456 | } 457 | 458 | /** 459 | * 1. Address box sizing set to content-box in IE 8/9. 460 | * 2. Remove excess padding in IE 8/9. 461 | * 3. Remove excess padding in IE 7. 462 | * Known issue: excess padding remains in IE 6. 463 | */ 464 | 465 | input[type="checkbox"], 466 | input[type="radio"] { 467 | box-sizing: border-box; /* 1 */ 468 | padding: 0; /* 2 */ 469 | *height: 13px; /* 3 */ 470 | *width: 13px; /* 3 */ 471 | } 472 | 473 | /** 474 | * 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome. 475 | * 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome 476 | * (include `-moz` to future-proof). 477 | */ 478 | 479 | input[type="search"] { 480 | -webkit-appearance: textfield; /* 1 */ 481 | -moz-box-sizing: content-box; 482 | -webkit-box-sizing: content-box; /* 2 */ 483 | box-sizing: content-box; 484 | } 485 | 486 | /** 487 | * Remove inner padding and search cancel button in Safari 5 and Chrome 488 | * on OS X. 489 | */ 490 | 491 | input[type="search"]::-webkit-search-cancel-button, 492 | input[type="search"]::-webkit-search-decoration { 493 | -webkit-appearance: none; 494 | } 495 | 496 | /** 497 | * Remove inner padding and border in Firefox 3+. 498 | */ 499 | 500 | button::-moz-focus-inner, 501 | input::-moz-focus-inner { 502 | border: 0; 503 | padding: 0; 504 | } 505 | 506 | /** 507 | * 1. Remove default vertical scrollbar in IE 6/7/8/9. 508 | * 2. 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