add SDL_mixer

.gitmodules

@@ -25,3 +25,6 @@
 [submodule "src/lib/snes_spc"]
 	path = src/lib/snes_spc
 	url = https://github.com/blarggs-audio-libraries/snes_spc.git
+[submodule "src/lib/SDL_mixer"]
+	path = src/lib/SDL_mixer
+	url = https://github.com/libsdl-org/SDL_mixer.git

CMakeLists.txt

@@ -40,6 +40,18 @@ if (UNIX)
 else()
   find_package(SDL2)
 endif()
+set(SDL2MIXER_OPUS OFF)
+set(SDL2MIXER_FLAC OFF)
+set(SDL2MIXER_MOD OFF)
+set(SDL2MIXER_MIDI_FLUIDSYNTH OFF)
+find_library(SDL_MIXER_LIBRARY
+  NAMES SDL_mixer
+  HINTS
+    ENV SDLMIXERDIR
+    ENV SDLDIR
+  PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
+  )
+add_subdirectory(src/lib/SDL_mixer)
 
 # Asar ------------------------------------------------------------------------
 add_subdirectory(src/lib/asar/src)

src/CMakeLists.txt

@@ -66,6 +66,7 @@ target_include_directories(
   ${CMAKE_SOURCE_DIR}/src/
   ${PNG_INCLUDE_DIRS}
   ${SDL2_INCLUDE_DIR}
+  lib/SDL_mixer/include/
   ${GLEW_INCLUDE_DIRS}
   lib/asar/src/asar/
   lib/snes_spc/snes_spc/
@@ -84,6 +85,8 @@ target_link_libraries(
   yaze PUBLIC
   ${ABSL_TARGETS}
   ${SDL_TARGETS}
+  ${SDLMIXER_LIBRARY}
+  SDL2_mixer
   ${PNG_LIBRARIES}
   ${GLEW_LIBRARIES}
   ${OPENGL_LIBRARIES}

src/app/core/controller.cc

@@ -1,6 +1,7 @@
 #include "controller.h"
 
 #include <SDL.h>
+#include <SDL_mixer.h>
 #include <imgui/backends/imgui_impl_sdl.h>
 #include <imgui/backends/imgui_impl_sdlrenderer.h>
 #include <imgui/imgui.h>
@@ -165,6 +166,11 @@ absl::Status Controller::CreateWindow() {
       return absl::InternalError(
           absl::StrFormat("SDL_CreateWindow: %s\n", SDL_GetError()));
     }
+    // Initialize SDL_mixer
+    if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0) {
+      printf("SDL_mixer could not initialize! SDL_mixer Error: %s\n",
+             Mix_GetError());
+    }
   }
   return absl::OkStatus();
 }

src/app/editor/music_editor.cc

@@ -1,5 +1,6 @@
 #include "music_editor.h"
 
+#include <SDL_mixer.h>
 #include <imgui/imgui.h>
 
 #include "absl/strings/str_format.h"
@@ -17,6 +18,8 @@ namespace editor {
 
 namespace {
 
+#define BUF_SIZE 2048
+
 void PlaySPC() {
   /* Create emulator and filter */
   SNES_SPC* snes_spc = spc_new();
@@ -43,9 +46,8 @@ void PlaySPC() {
   /* Record 20 seconds to wave file */
   wave_open(spc_sample_rate, "out.wav");
   wave_enable_stereo();
-  while (wave_sample_count() < 20 * spc_sample_rate * 2) {
-/* Play into buffer */
-#define BUF_SIZE 2048
+  while (wave_sample_count() < 30 * spc_sample_rate * 2) {
+    /* Play into buffer */
     short buf[BUF_SIZE];
     error(spc_play(snes_spc, BUF_SIZE, buf));
 
@@ -216,11 +218,34 @@ void MusicEditor::DrawToolset() {
   static bool is_playing = false;
   static int selected_option = 0;
   static int current_volume = 0;
+  static bool has_loaded_song = false;
   const int MAX_VOLUME = 100;
 
-
   if (is_playing) {
-    PlaySPC();
+    if (!has_loaded_song) {
+      PlaySPC();
+      current_song_ = Mix_LoadMUS("out.wav");
+      Mix_PlayMusic(current_song_, -1);
+      has_loaded_song = true;
+    }
+
+    // // If there is no music playing
+    // if (Mix_PlayingMusic() == 0) {
+    //   Mix_PlayMusic(current_song_, -1);
+    // }
+    // // If music is being played
+    // else {
+    //   // If the music is paused
+    //   if (Mix_PausedMusic() == 1) {
+    //     // Resume the music
+    //     Mix_ResumeMusic();
+    //   }
+    //   // If the music is playing
+    //   else {
+    //     // Pause the music
+    //     Mix_PauseMusic();
+    //   }
+    // }
   }
 
   gui::ItemLabel("Select a song to edit: ", gui::ItemLabelFlags::Left);
@@ -236,6 +261,10 @@ void MusicEditor::DrawToolset() {
 
     ImGui::TableNextColumn();
     if (ImGui::Button(is_playing ? ICON_MD_STOP : ICON_MD_PLAY_ARROW)) {
+      if (is_playing) {
+        Mix_HaltMusic();
+        has_loaded_song = false;
+      }
       is_playing = !is_playing;
     }
 

src/app/editor/music_editor.h

@@ -1,6 +1,7 @@
 #ifndef YAZE_APP_EDITOR_MUSIC_EDITOR_H
 #define YAZE_APP_EDITOR_MUSIC_EDITOR_H
 
+#include <SDL_mixer.h>
 #include <imgui/imgui.h>
 
 #include "absl/strings/str_format.h"
@@ -62,6 +63,8 @@ class MusicEditor {
   void DrawSongToolset();
   void DrawToolset();
 
+  Mix_Music* current_song_ = NULL;
+
   AssemblyEditor assembly_editor_;
   ImGuiTableFlags toolset_table_flags_ = ImGuiTableFlags_SizingFixedFit;
   ImGuiTableFlags music_editor_flags_ = ImGuiTableFlags_SizingFixedFit |