Improve CircularBuffer again

include/PSX/Auxiliary/circular_buffer.hpp

@@ -3,68 +3,61 @@
 #include "array_range.hpp"
 
 namespace JabyEngine {
-    template<typename T, uint32_t ElementCount>
-    class FastCircularBuffer {
-        private:
-            T*     start_adr = nullptr;
-            size_t read_idx  = 0;
-            size_t write_idx = 0;
+    template<typename T>
+    class CircularBuffer {
+    private:
+        T* start_adr = nullptr;
+        T* end_adr   = nullptr;
+        T* read_adr  = nullptr;
+        T* write_adr = nullptr;
 
-            static size_t increment(size_t cur_idx, size_t step) {
-                return ((cur_idx + step) & (ElementCount - 1));
+        T* increment(T* cur_element) const {
+            cur_element += 1;
+            if(cur_element == this->end_adr) {
+                return this->start_adr;
             }
 
-        public:
-            FastCircularBuffer() = default;
+            return cur_element;
+        }
 
-            size_t setup(T* buffer_start_adr) {
-                this->start_adr = buffer_start_adr;
-                this->read_idx  = 0;
-                this->write_idx = 0;
+    public:
+        CircularBuffer() = default;
         
-                return (sizeof(T)*ElementCount);
-            }
+        T* setup(T* buffer_start_adr, size_t elements) {
+            this->start_adr = buffer_start_adr;
+            this->end_adr   = &buffer_start_adr[elements];
 
-            T* allocate() {
-                const auto new_idx = FastCircularBuffer::increment(this->write_idx, 1);
-                if(new_idx != this->read_idx) {
-                    auto* dst = (this->start_adr + this->write_idx);
-                    
-                    this->write_idx = new_idx;
-                    return dst;
-                }
+            this->read_adr  = this->start_adr;
+            this->write_adr = this->start_adr;
+            return this->end_adr;
+        }
 
+        T* allocate() {
+            T* cur_adr  = this->write_adr;
+            T* next_adr = CircularBuffer::increment(cur_adr);
+            if(next_adr == this->read_adr) {
                 return nullptr;
             }
 
-            const T* pop() {
-                if(this->write_idx != this->read_idx) {
-                    const auto* src = (this->start_adr + this->read_idx);
-                    FastCircularBuffer::drop(1);
-
-                    return src;
-                }
-
-                return nullptr;
+            else {
+                this->write_adr = next_adr;
+                return cur_adr;
             }
+        }
 
-            void drop(size_t elements) {
-                this->read_idx = FastCircularBuffer::increment(this->read_idx, elements);
+        T* get_next() const {
+            return this->read_adr;
+        }
+
+        void pop() {
+            if(CircularBuffer::has_data()) {
+                this->read_adr = CircularBuffer::increment(this->read_adr);
             }
+        }
 
-            constexpr ArrayRange<T> get_first_continious() const {
-                return {&this->start_adr[this->read_idx], (this->write_idx >= this->read_idx) ? (this->write_idx - this->read_idx) : (ElementCount - this->read_idx)};
-            }
-
-            constexpr ArrayRange<T> get_second_continious() const {
-                return {this->start_adr, (this->write_idx < this->read_idx) ? this->write_idx : 0};
-            }
-
-            constexpr bool has_data() const {
-                return (this->read_idx != this->write_idx);
-            }
-
-            static_assert(ElementCount == 2 || ElementCount == 4 || ElementCount == 8 || ElementCount == 16 || ElementCount == 32 || ElementCount == 64 || ElementCount == 128 || ElementCount == 256, "ElementCount for FastCircularBuffer must be power of 2");
+        constexpr bool has_data() const {
+            return (this->read_adr != this->write_adr);
+        }
     };
 }
 

include/PSX/File/Processor/cd_file_processor.hpp

@@ -18,12 +18,12 @@ namespace JabyEngine {
         };
 
     private:
-        FileProcessor::State                     file_pro_state;
-        FastCircularBuffer<CD_IO::DataSector, 8> circular_buffer;
-        LZ4Decompressor                          lz4_decomp;
-        JobArray                                 jobs;
-        uint8_t*                                 work_area = nullptr;
-        const AutoLBAEntry*                      lba       = nullptr;
+        FileProcessor::State              file_pro_state;
+        CircularBuffer<CD_IO::DataSector> circular_buffer;
+        LZ4Decompressor                   lz4_decomp;
+        JobArray                          jobs;
+        uint8_t*                          work_area = nullptr;
+        const AutoLBAEntry*               lba       = nullptr;
 
         void start_cur_job();
 

src/Library/src/File/Processor/cd_file_processor.cpp

@@ -21,18 +21,25 @@ namespace JabyEngine {
 
     void CDFileProcessor :: setup(const volatile AutoLBAEntry* lba, JobArray jobs, uint8_t* work_area) {
         this->lba       = const_cast<const AutoLBAEntry*>(lba);
-        this->work_area = (work_area + this->circular_buffer.setup(reinterpret_cast<CD_IO::DataSector*>(work_area)));
+        this->work_area = reinterpret_cast<uint8_t*>(this->circular_buffer.setup(reinterpret_cast<CD_IO::DataSector*>(work_area), 5));
         this->jobs      = jobs;
 
         CDFileProcessor::start_cur_job();
     }
 
     Progress CDFileProcessor :: process() {
+        const auto test_print = [this](){
+            if(this->circular_buffer.has_data()) {
+                printf("Got-Data: %s\n", this->circular_buffer.get_next());
+                this->circular_buffer.pop();
+            }
+        };
+
         switch(CD::internal::read_current_state()) {
             case CD::internal::State::Done:
                 // Need to start next job? 
                 // Does the user trigger this?
-                printf("Done: %i\n", this->circular_buffer.has_data());
+                test_print();
                 return Progress::Done;
 
             case CD::internal::State::BufferFull:
@@ -42,6 +49,7 @@ namespace JabyEngine {
 
             case CD::internal::State::Reading:
                 // Do we have data? Use it!
+                test_print();
                 return Progress::InProgress;
 
             case CD::internal::State::Error: