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      1 /*
      2  * smart_buffer_priv.cpp - smart buffer for XCamVideoBuffer
      3  *
      4  *  Copyright (c) 2016-2017 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 #include <xcam_std.h>
     22 #include "base/xcam_buffer.h"
     23 #include "video_buffer.h"
     24 #if HAVE_LIBDRM
     25 #include "drm_bo_buffer.h"
     26 #endif
     27 
     28 namespace XCam {
     29 
     30 class SmartBufferPriv
     31     : public XCamVideoBufferIntel
     32 {
     33 public:
     34     SmartBufferPriv (const SmartPtr<VideoBuffer> &buf);
     35     ~SmartBufferPriv ();
     36 
     37     bool is_valid () const {
     38         return _buf_ptr.ptr ();
     39     }
     40 
     41     static void     buf_ref (XCamVideoBuffer *data);
     42     static void     buf_unref (XCamVideoBuffer *data);
     43     static uint8_t *buf_map (XCamVideoBuffer *data);
     44     static void     buf_unmap (XCamVideoBuffer *data);
     45     static int      buf_get_fd (XCamVideoBuffer *data);
     46     static void    *buf_get_bo (XCamVideoBufferIntel *data);
     47 
     48 private:
     49     XCAM_DEAD_COPY (SmartBufferPriv);
     50 
     51 private:
     52     mutable RefCount       *_ref;
     53     SmartPtr<VideoBuffer>   _buf_ptr;
     54 };
     55 
     56 SmartBufferPriv::SmartBufferPriv (const SmartPtr<VideoBuffer> &buf)
     57     : _ref (NULL)
     58 {
     59     XCAM_ASSERT (buf.ptr ());
     60     this->_buf_ptr = buf;
     61 
     62     if (!buf.ptr ()) {
     63         return;
     64     }
     65 
     66     _ref = new RefCount ();
     67 
     68     const VideoBufferInfo& video_info = buf->get_video_info ();
     69 
     70     this->base.info = *((const XCamVideoBufferInfo*)&video_info);
     71     this->base.mem_type = XCAM_MEM_TYPE_PRIVATE_BO;
     72     this->base.timestamp = buf->get_timestamp ();
     73 
     74     this->base.ref = SmartBufferPriv::buf_ref;
     75     this->base.unref = SmartBufferPriv::buf_unref;
     76     this->base.map = SmartBufferPriv::buf_map;
     77     this->base.unmap = SmartBufferPriv::buf_unmap;
     78     this->base.get_fd = SmartBufferPriv::buf_get_fd;
     79     this->get_bo = SmartBufferPriv::buf_get_bo;
     80 }
     81 
     82 SmartBufferPriv::~SmartBufferPriv ()
     83 {
     84     delete _ref;
     85 }
     86 
     87 void
     88 SmartBufferPriv::buf_ref (XCamVideoBuffer *data)
     89 {
     90     SmartBufferPriv *buf = (SmartBufferPriv*) data;
     91     XCAM_ASSERT (buf->_ref);
     92     if (buf->_ref)
     93         buf->_ref->ref ();
     94 }
     95 
     96 void
     97 SmartBufferPriv::buf_unref (XCamVideoBuffer *data)
     98 {
     99     SmartBufferPriv *buf = (SmartBufferPriv*) data;
    100     XCAM_ASSERT (buf->_ref);
    101     if (buf->_ref) {
    102         if (!buf->_ref->unref()) {
    103             delete buf;
    104         }
    105     }
    106 }
    107 
    108 uint8_t *
    109 SmartBufferPriv::buf_map (XCamVideoBuffer *data)
    110 {
    111     SmartBufferPriv *buf = (SmartBufferPriv*) data;
    112     XCAM_ASSERT (buf->_buf_ptr.ptr ());
    113     return buf->_buf_ptr->map ();
    114 }
    115 
    116 void
    117 SmartBufferPriv::buf_unmap (XCamVideoBuffer *data)
    118 {
    119     SmartBufferPriv *buf = (SmartBufferPriv*) data;
    120     XCAM_ASSERT (buf->_buf_ptr.ptr ());
    121     buf->_buf_ptr->unmap ();
    122 }
    123 
    124 int
    125 SmartBufferPriv::buf_get_fd (XCamVideoBuffer *data)
    126 {
    127     SmartBufferPriv *buf = (SmartBufferPriv*) data;
    128     XCAM_ASSERT (buf->_buf_ptr.ptr ());
    129     return buf->_buf_ptr->get_fd ();
    130 }
    131 
    132 void *
    133 SmartBufferPriv::buf_get_bo (XCamVideoBufferIntel *data)
    134 {
    135 #if HAVE_LIBDRM
    136     SmartBufferPriv *buf = (SmartBufferPriv*) data;
    137     XCAM_ASSERT (buf->_buf_ptr.ptr ());
    138 
    139     SmartPtr<DrmBoBuffer> bo_buf = buf->_buf_ptr.dynamic_cast_ptr<DrmBoBuffer> ();
    140     XCAM_FAIL_RETURN (
    141         ERROR,
    142         bo_buf.ptr (),
    143         NULL,
    144         "get DrmBoBuffer failed");
    145 
    146     return bo_buf->get_bo ();
    147 #else
    148     XCAM_LOG_ERROR ("VideoBuffer doesn't support DrmBoBuffer");
    149 
    150     XCAM_UNUSED (data);
    151     return NULL;
    152 #endif
    153 }
    154 
    155 XCamVideoBuffer *
    156 convert_to_external_buffer (const SmartPtr<VideoBuffer> &buf)
    157 {
    158     SmartBufferPriv *priv_buf = new SmartBufferPriv (buf);
    159     XCAM_ASSERT (priv_buf);
    160 
    161     if (priv_buf->is_valid ())
    162         return (XCamVideoBuffer *)(priv_buf);
    163 
    164     delete priv_buf;
    165     return NULL;
    166 }
    167 
    168 }
    169