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      1 /*
      2  * drm_bo_buffer.h - drm bo buffer
      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 #ifndef XCAM_DRM_BO_BUFFER_H
     21 #define XCAM_DRM_BO_BUFFER_H
     22 
     23 #include <xcam_std.h>
     24 #include <safe_list.h>
     25 #include <xcam_mutex.h>
     26 #include <buffer_pool.h>
     27 #include <drm_display.h>
     28 #include <swapped_buffer.h>
     29 
     30 namespace XCam {
     31 
     32 class DrmBoBufferPool;
     33 class X3aStats;
     34 
     35 class DrmBoData
     36     : public BufferData
     37 {
     38     friend class DrmDisplay;
     39 
     40 public:
     41     ~DrmBoData ();
     42     drm_intel_bo *get_bo () {
     43         return _bo;
     44     }
     45 
     46     //derived from BufferData
     47     virtual uint8_t *map ();
     48     virtual bool unmap ();
     49     virtual int get_fd ();
     50 
     51 protected:
     52     explicit DrmBoData (SmartPtr<DrmDisplay> &display, drm_intel_bo *bo);
     53 
     54     bool set_prime_fd (int fd, bool need_close);
     55 
     56 private:
     57     XCAM_DEAD_COPY (DrmBoData);
     58 
     59 private:
     60     SmartPtr<DrmDisplay>       _display;
     61     drm_intel_bo              *_bo;
     62     uint8_t                   *_buf;
     63     int                       _prime_fd;
     64     bool                      _need_close_fd;
     65 };
     66 
     67 class DrmBoBuffer
     68     : public virtual BufferProxy
     69     , public SwappedBuffer
     70 {
     71     friend class DrmBoBufferPool;
     72     friend class DrmDisplay;
     73 
     74 public:
     75     virtual ~DrmBoBuffer () {}
     76     drm_intel_bo *get_bo ();
     77 
     78     SmartPtr<X3aStats> find_3a_stats ();
     79 
     80 protected:
     81     DrmBoBuffer (const VideoBufferInfo &info, const SmartPtr<DrmBoData> &data);
     82 
     83     //derived from SwappedBuffer
     84     virtual SmartPtr<SwappedBuffer> create_new_swap_buffer (
     85         const VideoBufferInfo &info, SmartPtr<BufferData> &data);
     86 
     87     XCAM_DEAD_COPY (DrmBoBuffer);
     88 };
     89 
     90 class DrmBoBufferPool
     91     : public BufferPool
     92 {
     93     friend class DrmBoBuffer;
     94 
     95 public:
     96     explicit DrmBoBufferPool (SmartPtr<DrmDisplay> &display);
     97     ~DrmBoBufferPool ();
     98 
     99     // **** MUST be set before set_video_info ****
    100     void set_swap_flags (uint32_t flags, uint32_t init_order) {
    101         _swap_flags = flags;
    102         _swap_init_order = init_order;
    103     }
    104     uint32_t get_swap_flags () const {
    105         return _swap_flags;
    106     }
    107 
    108     bool update_swap_init_order (uint32_t init_order);
    109 
    110     SmartPtr<DrmDisplay> &get_drm_display () {
    111         return _display;
    112     }
    113 
    114 protected:
    115     // derived from BufferPool
    116     virtual bool fixate_video_info (VideoBufferInfo &info);
    117     virtual SmartPtr<BufferData> allocate_data (const VideoBufferInfo &buffer_info);
    118     virtual SmartPtr<BufferProxy> create_buffer_from_data (SmartPtr<BufferData> &data);
    119 
    120     bool init_swap_order (VideoBufferInfo &info);
    121 
    122 private:
    123     XCAM_DEAD_COPY (DrmBoBufferPool);
    124 
    125 protected:
    126     uint32_t                 _swap_flags;
    127     uint32_t                 _swap_init_order;
    128     uint32_t                 _swap_offsets[XCAM_VIDEO_MAX_COMPONENTS * 2];
    129 
    130 private:
    131     SmartPtr<DrmDisplay>     _display;
    132 };
    133 
    134 };
    135 
    136 #endif //XCAM_DRM_BO_BUFFER_H
    137 
    138