From a7bae0148d57d25f631ffc10ae2dc6c455ee99ed Mon Sep 17 00:00:00 2001
From: Diogo Miranda <diogomsmiranda@gmail.com>
Date: Sun, 29 Sep 2024 22:26:52 +0100
Subject: [PATCH] feat(audio): Add Audio asset (#230)
MIME-Version: 1.0
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Co-Authored-By: João Miguel Nogueira <101069446+Dageus@users.noreply.github.com>
---
 engine/CMakeLists.txt                        |  3 ++
 engine/include/cubos/engine/audio/audio.hpp  | 27 ++++++++++++
 engine/include/cubos/engine/audio/bridge.hpp | 30 +++++++++++++
 engine/src/audio/audio.cpp                   | 44 ++++++++++++++++++++
 engine/src/audio/bridge.cpp                  | 26 ++++++++++++
 5 files changed, 130 insertions(+)
 create mode 100644 engine/include/cubos/engine/audio/audio.hpp
 create mode 100644 engine/include/cubos/engine/audio/bridge.hpp
 create mode 100644 engine/src/audio/audio.cpp
 create mode 100644 engine/src/audio/bridge.cpp

diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
index c17dca0871..14bb380277 100644
--- a/engine/CMakeLists.txt
+++ b/engine/CMakeLists.txt
@@ -36,6 +36,9 @@ set(CUBOS_ENGINE_SOURCE
 	"src/utils/free_camera/plugin.cpp"
 	"src/utils/free_camera/controller.cpp"
 
+    "src/audio/audio.cpp"
+    "src/audio/bridge.cpp"
+
 	"src/assets/plugin.cpp"
 	"src/assets/assets.cpp"
 	"src/assets/bridge.cpp"
diff --git a/engine/include/cubos/engine/audio/audio.hpp b/engine/include/cubos/engine/audio/audio.hpp
new file mode 100644
index 0000000000..82a9aca1fc
--- /dev/null
+++ b/engine/include/cubos/engine/audio/audio.hpp
@@ -0,0 +1,27 @@
+/// @file
+/// @brief Class @ref cubos::engine::Audio.
+/// @ingroup audio-plugin
+#pragma once
+
+#include <cubos/core/al/miniaudio_device.hpp>
+#include <cubos/core/memory/stream.hpp>
+#include <cubos/core/reflection/reflect.hpp>
+
+#include <cubos/engine/assets/asset.hpp>
+
+namespace cubos::engine
+{
+    /// @brief Asset containing raw Audio data.
+    ///
+    /// @ingroup audio-plugin
+    struct CUBOS_ENGINE_API Audio
+    {
+        CUBOS_REFLECT;
+        std::shared_ptr<cubos::core::al::impl::Buffer> mData; // Raw data of the audio
+        size_t mLength;                                       // Audio length in seconds TODO: add getter in audio
+
+        explicit Audio(core::memory::Stream& stream);
+        Audio(Audio&& other) noexcept;
+        ~Audio();
+    };
+} // namespace cubos::engine
diff --git a/engine/include/cubos/engine/audio/bridge.hpp b/engine/include/cubos/engine/audio/bridge.hpp
new file mode 100644
index 0000000000..576afe8cdd
--- /dev/null
+++ b/engine/include/cubos/engine/audio/bridge.hpp
@@ -0,0 +1,30 @@
+/// @file
+/// @brief Class @ref cubos::engine::AudioBridge.
+/// @ingroup audio-plugin
+
+#pragma once
+
+#include <cubos/engine/assets/bridges/file.hpp>
+#include <cubos/engine/audio/audio.hpp>
+
+namespace cubos::engine
+{
+    /// @brief Bridge which loads and saves @ref Sound assets.
+    ///
+    /// Uses the format specified in @ref Audio::loadFrom and @ref Audio::writeTo
+    ///
+    /// @ingroup audio-plugin
+    class AudioBridge : public FileBridge
+    {
+    public:
+        /// @brief Constructs a bridge.
+        AudioBridge()
+            : FileBridge(core::reflection::reflect<Audio>())
+        {
+        }
+
+    protected:
+        bool loadFromFile(Assets& assets, const AnyAsset& handle, core::memory::Stream& stream) override;
+        bool saveToFile(const Assets& assets, const AnyAsset& handle, core::memory::Stream& stream) override;
+    };
+} // namespace cubos::engine
diff --git a/engine/src/audio/audio.cpp b/engine/src/audio/audio.cpp
new file mode 100644
index 0000000000..ff933a84ee
--- /dev/null
+++ b/engine/src/audio/audio.cpp
@@ -0,0 +1,44 @@
+#include <cubos/core/log.hpp>
+#include <cubos/core/reflection/external/cstring.hpp>
+#include <cubos/core/reflection/type.hpp>
+
+#include <cubos/engine/audio/audio.hpp>
+
+CUBOS_REFLECT_IMPL(cubos::engine::Audio)
+{
+    return core::reflection::Type::create("cubos::engine::Audio");
+}
+
+cubos::engine::Audio::Audio(core::memory::Stream& stream)
+{
+    stream.seek(0, cubos::core::memory::SeekOrigin::End);
+    size_t streamSize = stream.tell();
+    void* contents = operator new(sizeof(char) * streamSize);
+    stream.seek(0, cubos::core::memory::SeekOrigin::Begin);
+    if (stream.read((char*)contents, streamSize) < streamSize)
+    {
+        CUBOS_ERROR("Couldn't load audio: Read less than stream lenght");
+        // TODO: add audio buffer here
+        mData = nullptr;
+        operator delete(contents);
+        return;
+    };
+
+    mData = cubos::core::al::MiniaudioDevice::createBuffer(contents, (size_t)streamSize);
+    if (mData == nullptr)
+    {
+        CUBOS_ERROR("Couldn't create audio buffer");
+    }
+    operator delete(contents);
+}
+
+cubos::engine::Audio::~Audio()
+{
+    // no need to delete buffer thanks to shared_ptr
+}
+
+cubos::engine::Audio::Audio(Audio&& other) noexcept
+    : mData(other.mData)
+{
+    other.mData = nullptr;
+}
diff --git a/engine/src/audio/bridge.cpp b/engine/src/audio/bridge.cpp
new file mode 100644
index 0000000000..9a0dc91ceb
--- /dev/null
+++ b/engine/src/audio/bridge.cpp
@@ -0,0 +1,26 @@
+#include <cubos/core/log.hpp>
+
+#include <cubos/engine/assets/assets.hpp>
+#include <cubos/engine/audio/audio.hpp>
+#include <cubos/engine/audio/bridge.hpp>
+
+using namespace cubos::engine;
+
+bool AudioBridge::loadFromFile(Assets& assets, const AnyAsset& handle, core::memory::Stream& stream)
+{
+    Audio audio{stream};
+    if (audio.mData == nullptr)
+    {
+        return false;
+    }
+    assets.store(handle, std::move(audio));
+    return true;
+}
+bool AudioBridge::saveToFile(const Assets& assets, const AnyAsset& handle, core::memory::Stream& stream)
+{
+    (void)assets;
+    (void)handle;
+    (void)stream;
+    CUBOS_ERROR("Saving audios is currently unsupported");
+    return false;
+}