wip - file_service

src/engine/include/modules/audio.hpp

@@ -12,6 +12,7 @@
 #define _TYRA_AUDIO_
 
 #include "../models/audio_listener.hpp"
+#include "./file_service.hpp"
 #include <tamtypes.h>
 #include <stdio.h>
 #include <audsrv.h>
@@ -120,17 +121,15 @@ public:
      * Do not call this method unless you know what you do.
      * Should be called by engine. 
      */
-    void startThread();
+    void startThread(FileService *t_fileService);
 
 private:
     u8 songLoaded, volume, realVolume, songPlaying, songInLoop, songFinished;
     std::vector<AudioListenerRef> songListeners;
     FILE *wav;
     audsrv_fmt_t format;
-    // we have some sema problems here (sound freezing)
-    // this probably should be changed to smth like this:
-    // this thread (A) : play next chunks
-    // other thread (B) : load chunks (fread()) for thread A
+    FileService *fileService;
+
     char wavChunk[2 * 1024] __attribute__((aligned(16)));
     s32 chunkReadStatus;
 
@@ -150,7 +149,7 @@ private:
     void loadModules();
     void initAUDSRV();
     void threadLoop();
-    static void audioThread();
+    static void mainThread();
 };
 
 #endif

src/engine/include/modules/file_service.hpp

@@ -0,0 +1,115 @@
+/*
+# ______       ____   ___
+#   |     \/   ____| |___|    
+#   |     |   |   \  |   |       
+#-----------------------------------------------------------------------
+# Copyright 2020, tyra - https://github.com/h4570/tyra
+# Licenced under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#ifndef _TYRA_FILE_SERVICE_
+#define _TYRA_FILE_SERVICE_
+
+#include <tamtypes.h>
+#include <stdio.h>
+#include <kernel.h>
+#include <vector>
+
+enum FileServiceTaskType
+{
+    ReadChunk = 0
+};
+
+struct FileServiceTask
+{
+    FileServiceTaskType type;
+
+    u32 id;
+
+    /** 
+     * Used by types:
+     * - ReadChunk
+     */
+    FILE *file;
+
+    /** 
+     * Used by types:
+     * - ReadChunk
+     */
+    s32 readStatus;
+
+    /** 
+     * Used by types:
+     * - ReadChunk
+     */
+    void *destination;
+
+    /** 
+     * Used by types:
+     * - ReadChunk
+     */
+    u32 size;
+
+    /** 
+     * Used by types:
+     * - ReadChunk
+     */
+    u32 n;
+};
+
+/** Class responsible for background, non-blocking file loading playing. */
+class FileService
+{
+
+public:
+    /** Constructor is called by the engine. */
+    FileService();
+    ~FileService();
+
+    /** 
+     * Add task to read next chunk. ( fread() ) 
+     * @returns Task id
+     */
+    u32 addReadChunk(FILE *t_file, void *t_destination, const u32 &t_size, const u32 &t_n);
+
+    /** 
+     * Check if given task was done. 
+     * When task is done, this method will return read status. 
+     * After this, task is removed from file service, so this method 
+     * will return something once per task.
+     * @returns Read status (ex. result of fread()). -2137 if task is not done.
+     */
+    s32 isTaskDone(const u32 &t_taskId);
+
+    /** 
+     * Start file service thread.
+     * Do not call this method unless you know what you do.
+     * Should be called by engine. 
+     */
+    void startThread();
+
+    std::vector<FileServiceTask> tasks;
+
+private:
+    /** Remove task by index */
+    void removeByIndex(const u32 &t_index) { tasks.erase(tasks.begin() + t_index); }
+
+    /** Remove task by id */
+    const void removeById(const u32 &t_taskId);
+
+    /** 
+     * Get index of task.
+     * @returns Index of task. -1 if not found.
+     */
+    const s32 getIndexOf(const u32 &t_taskId);
+
+    u8 threadStack[8 * 1024] __attribute__((aligned(16)));
+    u32 getThreadStackSize() { return 8 * 1024; }
+    ee_thread_t thread;
+    int threadId;
+    void threadLoop();
+    static void mainThread();
+};
+
+#endif