dep: remove sdl2-mixer dependency

.github/workflows/linux-build.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Install dependencies
-      run: sudo apt-get update && sudo apt-get install -y libasound2 libsdl2-dev libsdl2-ttf-dev libsdl2-mixer-dev libsdl2-image-dev ffmpeg libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libpostproc-dev libswresample-dev libswscale-dev pkg-config build-essential
+      run: sudo apt-get update && sudo apt-get install -y libasound2 libsdl2-dev libsdl2-ttf-dev libsdl2-image-dev ffmpeg libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libpostproc-dev libswresample-dev libswscale-dev pkg-config build-essential
     - name: Build
       run: cargo build --verbose
     #- name: Run tests

.github/workflows/win-build.yml

@@ -22,7 +22,7 @@ jobs:
         .\msys2-installer.exe in --confirm-command --accept-messages --root C:/msys64-bidrum
     - name: Install FFmpeg and SDL2
       run: |
-        C:\msys64-bidrum\usr\bin\bash.exe -l -c "pacman --noconfirm -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-ffmpeg mingw-w64-x86_64-clang mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_ttf mingw-w64-x86_64-SDL2_image mingw-w64-x86_64-SDL2_mixer mingw-w64-x86_64-pkg-config"
+        C:\msys64-bidrum\usr\bin\bash.exe -l -c "pacman --noconfirm -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-ffmpeg mingw-w64-x86_64-clang mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_ttf mingw-w64-x86_64-SDL2_image mingw-w64-x86_64-pkg-config"
     - name: Prepare GNU toolchain for rust
       run: |
         rustup toolchain install stable-gnu

README.md

@@ -5,7 +5,7 @@
 ### Linux
 1. Install `git-lfs` before you clone
 1. Install rust
-1. Install ffmpeg 7.*, sdl2, sdl2_mixer, sdl2_image, sdl2_ttf.
+1. Install ffmpeg 7.*, sdl2, sdl2_image, sdl2_ttf.
     - For instructions on sdl2 installation, see [rust-sdl2 README](https://github.com/Rust-SDL2/rust-sdl2).
 1. Run `cargo build`
     - If there's an error related to FFmpeg library building, try installing EVERY libraries related to libclang, INCLUDING development libraries. this may fix the problem.
@@ -14,7 +14,7 @@
 ### Mac OS
 1. Install `git-lfs` before you clone
 1. Install rust
-1. Install ffmpeg 7.*, sdl2, sdl2_mixer, sdl2_image, sdl2_ttf.
+1. Install ffmpeg 7.*, sdl2, sdl2_image, sdl2_ttf.
     - For instructions on sdl2 installation, see [rust-sdl2 README](https://github.com/Rust-SDL2/rust-sdl2).
 1. Type `export LIBRARY_PATH="$LIBRARY_PATH:$(brew --prefix)/lib"` to your terminal.
 1. Run `cargo build`
@@ -31,7 +31,7 @@ Due to difficulties on building Rust FFmpeg library on Windows, The GNU toolchai
 1. Run following command on **MSYS2 SHELL**. (**NOT POWERSHELL / CMD / GIT BASH**)
     - Append `--noconfirm` parameter if you want to say "yes" to all the questions automatically
     ```bash
-    pacman -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-ffmpeg mingw-w64-x86_64-clang mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_ttf mingw-w64-x86_64-SDL2_image mingw-w64-x86_64-SDL2_mixer
+    pacman -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-ffmpeg mingw-w64-x86_64-clang mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_ttf mingw-w64-x86_64-SDL2_image
     ```
 1. (Optional) Run the following commands in PowerShell or cmd and remember default host and default toolchain.
     - You can use the default host and default toolchain remembered here after building bidrum, with `rustup set default-host` and `rustup default` commands.

game/Cargo.toml

@@ -12,7 +12,7 @@ clap = { version = "4.4.13", features = ["derive"] }
 ffmpeg-next = "7.0.0"
 kira = "0.8.6"
 num-rational = "0.4.1"
-sdl2 = { version = "0.36.0", features = ["image", "ttf", "mixer"] }
+sdl2 = { version = "0.36.0", features = ["image", "ttf"] }
 serde = { version = "1.0.195", features = ["derive"] }
 serde_json = "1.0.111"
 serialport = "4.3.0"