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      1 /*
      2  * cl_3a_stats_context.h - CL 3a stats context
      3  *
      4  *  Copyright (c) 2015 Intel Corporation
      5  *
      6  * Licensed under the Apache License, Version 2.0 (the "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  *
     18  * Author: Wind Yuan <feng.yuan (at) intel.com>
     19  */
     20 
     21 #ifndef XCAM_CL_3A_STATS_CONTEXT_H
     22 #define XCAM_CL_3A_STATS_CONTEXT_H
     23 
     24 #include <xcam_std.h>
     25 #include <x3a_stats_pool.h>
     26 #include <ocl/cl_memory.h>
     27 #include <ocl/cl_context.h>
     28 
     29 #define XCAM_CL_3A_STATS_BUFFER_COUNT 6
     30 
     31 namespace XCam {
     32 
     33 class CL3AStatsCalculatorContext
     34 {
     35 public:
     36     struct CL3AStatsStruct {
     37         uint16_t avg_y;
     38         uint16_t avg_r;
     39         uint16_t avg_gr;
     40         uint16_t avg_gb;
     41         uint16_t avg_b;
     42         uint16_t valid_wb_count;
     43         uint16_t f_value1;
     44         uint16_t f_value2;
     45     };
     46 
     47 public:
     48     CL3AStatsCalculatorContext (const SmartPtr<CLContext> &context);
     49     ~CL3AStatsCalculatorContext ();
     50     void set_bit_depth (uint32_t bits);
     51 
     52     bool is_ready () const {
     53         return _data_allocated;
     54     }
     55     bool allocate_data (const VideoBufferInfo &buffer_info, uint32_t width_factor, uint32_t height_factor);
     56     void pre_stop ();
     57     void clean_up_data ();
     58 
     59     SmartPtr<CLBuffer> get_buffer ();
     60     bool release_buffer (SmartPtr<CLBuffer> &buf);
     61     SmartPtr<X3aStats> copy_stats_out (const SmartPtr<CLBuffer> &stats_cl_buf);
     62 
     63 private:
     64     XCAM_DEAD_COPY (CL3AStatsCalculatorContext);
     65 
     66     bool fill_histogram (XCam3AStats *stats);
     67 
     68 private:
     69     SmartPtr<CLContext>              _context;
     70     SmartPtr<X3aStatsPool>           _stats_pool;
     71     SafeList<CLBuffer>               _stats_cl_buffers;
     72     uint32_t                         _stats_mem_size;
     73     uint32_t                         _width_factor;
     74     uint32_t                         _height_factor;
     75     uint32_t                         _factor_shift;
     76     XCam3AStatsInfo                  _stats_info;
     77     bool                             _data_allocated;
     78 };
     79 
     80 }
     81 #endif //XCAM_CL_3A_STATS_CONTEXT_H
     82