Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 467 insertions, 0 deletions

diff --git a/dom/midi/midir_impl/Cargo.toml b/dom/midi/midir_impl/Cargo.toml
new file mode 100644
index 0000000000..1e6d4030bf
--- /dev/null
+++ b/dom/midi/midir_impl/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "midir_impl"
+version = "0.1.0"
+authors = ["Gabriele Svelto"]
+edition = "2018"
+license = "MPL-2.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+midir = "0.7.0"
+nsstring = { path = "../../../xpcom/rust/nsstring/" }
+uuid = { version = "1.0", features = ["v4"] }
+thin-vec = { version = "0.2.1", features = ["gecko-ffi"] }
diff --git a/dom/midi/midir_impl/cbindgen.toml b/dom/midi/midir_impl/cbindgen.toml
new file mode 100644
index 0000000000..1b80a85e45
--- /dev/null
+++ b/dom/midi/midir_impl/cbindgen.toml
@@ -0,0 +1,18 @@
+header = """/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */"""
+autogen_warning = """/* DO NOT MODIFY THIS MANUALLY! This file was generated using cbindgen. See RunCbindgen.py */
+"""
+include_version = true
+braces = "SameLine"
+line_length = 100
+tab_width = 2
+language = "C++"
+include_guard = "midir_impl_ffi_generated_h"
+includes = ["nsStringFwd.h", "nsTArrayForwardDeclare.h"]
+
+[defines]
+"target_os = windows" = "XP_WIN"
+
+[export.rename]
+"ThinVec" = "nsTArray"
diff --git a/dom/midi/midir_impl/moz.build b/dom/midi/midir_impl/moz.build
new file mode 100644
index 0000000000..f079022906
--- /dev/null
+++ b/dom/midi/midir_impl/moz.build
@@ -0,0 +1,17 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["COMPILE_ENVIRONMENT"]:
+    # This tells mach to run cbindgen and that this header-file should be created
+    CbindgenHeader(
+        "midir_impl_ffi_generated.h",
+        inputs=["/dom/midi/midir_impl"],
+    )
+
+    # This tells mach to copy that generated file to obj/dist/includes/mozilla/dom/midi
+    EXPORTS.mozilla.dom.midi += [
+        "!midir_impl_ffi_generated.h",
+    ]
diff --git a/dom/midi/midir_impl/src/lib.rs b/dom/midi/midir_impl/src/lib.rs
new file mode 100644
index 0000000000..de47fbeb11
--- /dev/null
+++ b/dom/midi/midir_impl/src/lib.rs
@@ -0,0 +1,418 @@
+extern crate thin_vec;
+
+use midir::{
+    InitError, MidiInput, MidiInputConnection, MidiInputPort, MidiOutput, MidiOutputConnection,
+    MidiOutputPort,
+};
+use nsstring::{nsAString, nsString};
+use std::boxed::Box;
+use std::ptr;
+use thin_vec::ThinVec;
+use uuid::Uuid;
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+extern crate midir;
+
+#[cfg(target_os = "windows")]
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub struct GeckoTimeStamp {
+    gtc: u64,
+    qpc: u64,
+
+    is_null: u8,
+    has_qpc: u8,
+}
+
+#[cfg(not(target_os = "windows"))]
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub struct GeckoTimeStamp {
+    value: u64,
+}
+
+enum MidiConnection {
+    Input(MidiInputConnection<CallbackData>),
+    Output(MidiOutputConnection),
+}
+
+struct MidiConnectionWrapper {
+    id: String,
+    connection: MidiConnection,
+}
+
+enum MidiPort {
+    Input(MidiInputPort),
+    Output(MidiOutputPort),
+}
+
+struct MidiPortWrapper {
+    id: String,
+    name: String,
+    port: MidiPort,
+    open_count: u32,
+}
+
+impl MidiPortWrapper {
+    fn input(self: &MidiPortWrapper) -> bool {
+        match self.port {
+            MidiPort::Input(_) => true,
+            MidiPort::Output(_) => false,
+        }
+    }
+}
+
+pub struct MidirWrapper {
+    ports: Vec<MidiPortWrapper>,
+    connections: Vec<MidiConnectionWrapper>,
+}
+
+struct CallbackData {
+    nsid: nsString,
+    open_timestamp: GeckoTimeStamp,
+}
+
+type AddCallback = unsafe extern "C" fn(id: &nsString, name: &nsString, input: bool);
+type RemoveCallback = AddCallback;
+
+impl MidirWrapper {
+    fn refresh(
+        self: &mut MidirWrapper,
+        add_callback: AddCallback,
+        remove_callback: Option<RemoveCallback>,
+    ) {
+        if let Ok(ports) = collect_ports() {
+            if let Some(remove_callback) = remove_callback {
+                self.remove_missing_ports(&ports, remove_callback);
+            }
+
+            self.add_new_ports(ports, add_callback);
+        }
+    }
+
+    fn remove_missing_ports(
+        self: &mut MidirWrapper,
+        ports: &Vec<MidiPortWrapper>,
+        remove_callback: RemoveCallback,
+    ) {
+        let old_ports = &mut self.ports;
+        let mut i = 0;
+        while i < old_ports.len() {
+            if !ports
+                .iter()
+                .any(|p| p.name == old_ports[i].name && p.input() == old_ports[i].input())
+            {
+                let port = old_ports.remove(i);
+                let id = nsString::from(&port.id);
+                let name = nsString::from(&port.name);
+                unsafe { remove_callback(&id, &name, port.input()) };
+            } else {
+                i += 1;
+            }
+        }
+    }
+
+    fn add_new_ports(
+        self: &mut MidirWrapper,
+        ports: Vec<MidiPortWrapper>,
+        add_callback: AddCallback,
+    ) {
+        for port in ports {
+            if !self.is_port_present(&port) && !Self::is_microsoft_synth_output(&port) {
+                let id = nsString::from(&port.id);
+                let name = nsString::from(&port.name);
+                unsafe { add_callback(&id, &name, port.input()) };
+                self.ports.push(port);
+            }
+        }
+    }
+
+    fn is_port_present(self: &MidirWrapper, port: &MidiPortWrapper) -> bool {
+        self.ports
+            .iter()
+            .any(|p| p.name == port.name && p.input() == port.input())
+    }
+
+    // We explicitly disable Microsoft's soft synthesizer, see bug 1798097
+    fn is_microsoft_synth_output(port: &MidiPortWrapper) -> bool {
+        (port.input() == false) && (port.name == "Microsoft GS Wavetable Synth")
+    }
+
+    fn open_port(
+        self: &mut MidirWrapper,
+        nsid: &nsString,
+        timestamp: GeckoTimeStamp,
+        callback: unsafe extern "C" fn(
+            id: &nsString,
+            data: *const u8,
+            length: usize,
+            timestamp: &GeckoTimeStamp,
+            micros: u64,
+        ),
+    ) -> Result<(), ()> {
+        let id = nsid.to_string();
+        let connections = &mut self.connections;
+        let port = self.ports.iter_mut().find(|e| e.id.eq(&id));
+        if let Some(port) = port {
+            if port.open_count == 0 {
+                let connection = match &port.port {
+                    MidiPort::Input(port) => {
+                        let input = MidiInput::new("WebMIDI input").map_err(|_err| ())?;
+                        let data = CallbackData {
+                            nsid: nsid.clone(),
+                            open_timestamp: timestamp,
+                        };
+                        let connection = input
+                            .connect(
+                                port,
+                                "Input connection",
+                                move |stamp, message, data| unsafe {
+                                    callback(
+                                        &data.nsid,
+                                        message.as_ptr(),
+                                        message.len(),
+                                        &data.open_timestamp,
+                                        stamp,
+                                    );
+                                },
+                                data,
+                            )
+                            .map_err(|_err| ())?;
+                        MidiConnectionWrapper {
+                            id: id.clone(),
+                            connection: MidiConnection::Input(connection),
+                        }
+                    }
+                    MidiPort::Output(port) => {
+                        let output = MidiOutput::new("WebMIDI output").map_err(|_err| ())?;
+                        let connection = output
+                            .connect(port, "Output connection")
+                            .map_err(|_err| ())?;
+                        MidiConnectionWrapper {
+                            connection: MidiConnection::Output(connection),
+                            id: id.clone(),
+                        }
+                    }
+                };
+
+                connections.push(connection);
+            }
+
+            port.open_count += 1;
+            return Ok(());
+        }
+
+        Err(())
+    }
+
+    fn close_port(self: &mut MidirWrapper, id: &str) {
+        let port = self.ports.iter_mut().find(|e| e.id.eq(&id)).unwrap();
+        port.open_count -= 1;
+
+        if port.open_count > 0 {
+            return;
+        }
+
+        let connections = &mut self.connections;
+        let index = connections.iter().position(|e| e.id.eq(id)).unwrap();
+        let connection_wrapper = connections.remove(index);
+
+        match connection_wrapper.connection {
+            MidiConnection::Input(connection) => {
+                connection.close();
+            }
+            MidiConnection::Output(connection) => {
+                connection.close();
+            }
+        }
+    }
+
+    fn send(self: &mut MidirWrapper, id: &str, data: &[u8]) -> Result<(), ()> {
+        let connections = &mut self.connections;
+        let index = connections.iter().position(|e| e.id.eq(id)).ok_or(())?;
+        let connection_wrapper = connections.get_mut(index).unwrap();
+
+        match &mut connection_wrapper.connection {
+            MidiConnection::Output(connection) => {
+                connection.send(data).map_err(|_err| ())?;
+            }
+            _ => {
+                panic!("Sending on an input port!");
+            }
+        }
+
+        Ok(())
+    }
+}
+
+fn collect_ports() -> Result<Vec<MidiPortWrapper>, InitError> {
+    let input = MidiInput::new("WebMIDI input")?;
+    let output = MidiOutput::new("WebMIDI output")?;
+    let mut ports = Vec::<MidiPortWrapper>::new();
+    collect_input_ports(&input, &mut ports);
+    collect_output_ports(&output, &mut ports);
+    Ok(ports)
+}
+
+impl MidirWrapper {
+    fn new() -> Result<MidirWrapper, InitError> {
+        let ports = Vec::new();
+        let connections: Vec<MidiConnectionWrapper> = Vec::new();
+        Ok(MidirWrapper { ports, connections })
+    }
+}
+
+/// Create the C++ wrapper that will be used to talk with midir.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// This function deliberately leaks the wrapper because ownership is
+/// transfered to the C++ code. Use [midir_impl_shutdown()] to free it.
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_init(callback: AddCallback) -> *mut MidirWrapper {
+    if let Ok(mut midir_impl) = MidirWrapper::new() {
+        midir_impl.refresh(callback, None);
+
+        // Gecko invokes this initialization on a separate thread from all the
+        // other operations, so make it clear to Rust this needs to be Send.
+        fn assert_send<T: Send>(_: &T) {}
+        assert_send(&midir_impl);
+
+        let midir_box = Box::new(midir_impl);
+        // Leak the object as it will be owned by the C++ code from now on
+        Box::leak(midir_box) as *mut _
+    } else {
+        ptr::null_mut()
+    }
+}
+
+/// Refresh the list of ports.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// `wrapper` must be the pointer returned by [midir_impl_init()].
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_refresh(
+    wrapper: *mut MidirWrapper,
+    add_callback: AddCallback,
+    remove_callback: RemoveCallback,
+) {
+    (*wrapper).refresh(add_callback, Some(remove_callback))
+}
+
+/// Shutdown midir and free the C++ wrapper.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// `wrapper` must be the pointer returned by [midir_impl_init()]. After this
+/// has been called the wrapper object will be destoyed and cannot be accessed
+/// anymore.
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_shutdown(wrapper: *mut MidirWrapper) {
+    // The MidirImpl object will be automatically destroyed when the contents
+    // of this box are automatically dropped at the end of the function
+    let _midir_box = Box::from_raw(wrapper);
+}
+
+/// Open a MIDI port.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// `wrapper` must be the pointer returned by [midir_impl_init()].
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_open_port(
+    wrapper: *mut MidirWrapper,
+    nsid: *mut nsString,
+    timestamp: *mut GeckoTimeStamp,
+    callback: unsafe extern "C" fn(
+        id: &nsString,
+        data: *const u8,
+        length: usize,
+        timestamp: &GeckoTimeStamp,
+        micros: u64,
+    ),
+) -> bool {
+    (*wrapper)
+        .open_port(nsid.as_ref().unwrap(), *timestamp, callback)
+        .is_ok()
+}
+
+/// Close a MIDI port.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// `wrapper` must be the pointer returned by [midir_impl_init()].
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_close_port(wrapper: *mut MidirWrapper, id: *mut nsString) {
+    (*wrapper).close_port(&(*id).to_string());
+}
+
+/// Send a message over a MIDI output port.
+///
+/// This function will be exposed to C++
+///
+/// # Safety
+///
+/// `wrapper` must be the pointer returned by [midir_impl_init()].
+#[no_mangle]
+pub unsafe extern "C" fn midir_impl_send(
+    wrapper: *mut MidirWrapper,
+    id: *const nsAString,
+    data: *const ThinVec<u8>,
+) -> bool {
+    (*wrapper)
+        .send(&(*id).to_string(), (*data).as_slice())
+        .is_ok()
+}
+
+fn collect_input_ports(input: &MidiInput, wrappers: &mut Vec<MidiPortWrapper>) {
+    let ports = input.ports();
+    for port in ports {
+        let id = Uuid::new_v4()
+            .as_hyphenated()
+            .encode_lower(&mut Uuid::encode_buffer())
+            .to_owned();
+        let name = input
+            .port_name(&port)
+            .unwrap_or_else(|_| "unknown input port".to_string());
+        let port = MidiPortWrapper {
+            id,
+            name,
+            port: MidiPort::Input(port),
+            open_count: 0,
+        };
+        wrappers.push(port);
+    }
+}
+
+fn collect_output_ports(output: &MidiOutput, wrappers: &mut Vec<MidiPortWrapper>) {
+    let ports = output.ports();
+    for port in ports {
+        let id = Uuid::new_v4()
+            .as_hyphenated()
+            .encode_lower(&mut Uuid::encode_buffer())
+            .to_owned();
+        let name = output
+            .port_name(&port)
+            .unwrap_or_else(|_| "unknown input port".to_string());
+        let port = MidiPortWrapper {
+            id,
+            name,
+            port: MidiPort::Output(port),
+            open_count: 0,
+        };
+        wrappers.push(port);
+    }
+}