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Ladybird+LibWeb+WebContent: Create a platform plugin for playing audio

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This creates (and installs upon WebContent startup) a platform plugin to
play audio data.

On Serenity, we use AudioServer to play audio over IPC. Unfortunately,
AudioServer is currently coupled with Serenity's audio devices, and thus
cannot be used in Ladybird on Lagom. Instead, we use a Qt audio device
to play the audio, which requires the Qt multimedia package.

While we use Qt to play the audio, note that we can still use LibAudio
to decode the audio data and retrieve samples - we simply send Qt the
raw PCM signals.
This commit is contained in:
Timothy Flynn 2023-06-12 13:44:10 -04:00 • committed by Andreas Kling
parent ee48d7514f
commit a34e369252
15 changed files with 317 additions and 9 deletions
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8
Userland/Services/WebContent/main.cpp
View file

@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "AudioCodecPluginSerenity.h"
#include "ImageCodecPluginSerenity.h"
#include <LibCore/EventLoop.h>
#include <LibCore/LocalServer.h>
@ -25,7 +26,7 @@
ErrorOr<int> serenity_main(Main::Arguments)
{
Core::EventLoop event_loop;
TRY(Core::System::pledge("stdio recvfd sendfd accept unix rpath thread"));
TRY(Core::System::pledge("stdio recvfd sendfd accept unix rpath thread proc"));
// This must be first; we can't check if /tmp/webdriver exists once we've unveiled other paths.
auto webdriver_socket_path = DeprecatedString::formatted("{}/webdriver", TRY(Core::StandardPaths::runtime_directory()));
@ -35,6 +36,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
TRY(Core::System::unveil("/res", "r"));
TRY(Core::System::unveil("/etc/timezone", "r"));
TRY(Core::System::unveil("/usr/lib", "r"));
TRY(Core::System::unveil("/tmp/session/%sid/portal/audio", "rw"));
TRY(Core::System::unveil("/tmp/session/%sid/portal/request", "rw"));
TRY(Core::System::unveil("/tmp/session/%sid/portal/image", "rw"));
TRY(Core::System::unveil("/tmp/session/%sid/portal/websocket", "rw"));
@ -44,6 +46,10 @@ ErrorOr<int> serenity_main(Main::Arguments)
Web::Platform::ImageCodecPlugin::install(*new WebContent::ImageCodecPluginSerenity);
Web::Platform::FontPlugin::install(*new Web::Platform::FontPluginSerenity);
Web::Platform::AudioCodecPlugin::install_creation_hook([] {
return WebContent::AudioCodecPluginSerenity::create();
});
Web::WebSockets::WebSocketClientManager::initialize(TRY(WebView::WebSocketClientManagerAdapter::try_create()));
Web::ResourceLoader::initialize(TRY(WebView::RequestServerAdapter::try_create()));
TRY(Web::Bindings::initialize_main_thread_vm());