camera 插值

时间：10-02 整理：3721RD 点击：

SIMsun">CAMERA插值介绍
1．首先要用到的就是sensor_capability.h设置图像容量的相关宏，即使能图像大小的开关在此设置：

#if (defined(MT9P012_RAW)||defined(S5K3E2FX_RAW)||defined(RJ53S1BA0C_RAW)||defined(OV5630_RAW))
                     #define __IMAGE_SENSOR_5M__
#else 。
#else
            //#error
#endif
在合适的位置，或者关闭所有宏，设置新的宏__IMAGE_SENSOR_XM__ ；X=1,2,3,5，7,8等
2.       然后在MMI_features_camera.h文件中设置图片具体分辨率

         #if defined(__IMAGE_SENSOR_3M__) && (defined(MT6235) || defined(MT6235B))
            #define CAMERA_FEATURE_IMAGE_SIZE_LL_WIDTH          (2048)
            #define CAMERA_FEATURE_IMAGE_SIZE_LL_HEIGHT          (1536)
            #define CAMERA_FEATURE_IMAGE_SIZE_L_WIDTH             (800)
            #define CAMERA_FEATURE_IMAGE_SIZE_L_HEIGHT          (600)
            #define CAMERA_FEATURE_IMAGE_SIZE_M_WIDTH          (640)
            #define CAMERA_FEATURE_IMAGE_SIZE_M_HEIGHT          (480)
            #define CAMERA_FEATURE_IMAGE_SIZE_S_WIDTH          (320)
            #define CAMERA_FEATURE_IMAGE_SIZE_S_HEIGHT          (240)
            #define CAMERA_FEATURE_IMAGE_SIZE_SS_WIDTH          (240)
            #define CAMERA_FEATURE_IMAGE_SIZE_SS_HEIGHT          (400)

#elif defined(__IMAGE_SENSOR_2M__) && (defined(MT6235) || defined(MT6235B))
从LL,L,M,S,SS五种大小分辨率LL是超大，SS超小，选一组做修改，大小常考下面的表格：
分辨率乘积对应像素
640　X　480 307200 30万
1024　X　 768 786432 80万
1600　X　1200 1920000 200万
2048　X　1536 3145728 320万
2304　X　1728 3981312 400万
2580　X　1936 4994880 500万
2816　X　2112 5947392 600万
3072　X　2304 7077888 700万
3200　X　2400 7680000 770万
3264　X　2448 7990272 800万
3876　X　2584 10015584 1000万
需要注意的是宏开关与前面的设置要一样，#if defined(__IMAGE_SENSOR_XM__) && (defined(MT6235) || defined(MT6235B))，所以在此添加一个#elif defined（）避免与其他旧数据冲突。
3. 最后编译即可

出现问题：差值5M出现拍照死机
解决方案：
1. 通过trace跟踪发现在cam_msg_handler.c文件中代码处
      ASSERT(capture_isp_param.v_address + capture_isp_param.v_size <=
            cam_context_p->capture_buffer_p + MAX_CAM_CAPTURE_ISP_BUF_SIZE);
这部分死机，表明内存分配可能不足。
2. 往上查看cam_msg_handler.c中
img_width = (req_p->image_width%16==0)? req_p->image_width : 16 - (req_p->image_width%16) + req_p->image_width;
img_height = (req_p->image_height%16==0)? req_p->image_height : 16 - (req_p->image_height%16) + req_p->image_height;
cam_context_p->channel_size = img_width*img_height;
      if (capture_isp_param.jpeg_gray_mode ==0)
{
      /* color mode */
      capture_isp_param.y_size = cam_context_p->channel_size;
      capture_isp_param.u_size = cam_context_p->channel_size/4;
      capture_isp_param.v_size = cam_context_p->channel_size/4;

      capture_isp_param.y_address = cam_context_p->y_address =
         (kal_uint32)(cam_context_p->capture_buffer_p + MAX_JPEG_ENCODE_MARGIN_LEN);
      capture_isp_param.u_address = cam_context_p->u_address =
         (kal_uint32)(cam_context_p->y_address + capture_isp_param.y_size);
      capture_isp_param.v_address = cam_context_p->v_address =
         (kal_uint32)(cam_context_p->u_address + capture_isp_param.u_size);

ASSERT(capture_isp_param.v_address + capture_isp_param.v_size <=
cam_context_p->capture_buffer_p + MAX_CAM_CAPTURE_ISP_BUF_SIZE);
}
由以上程序可知capture_isp_param.v_address+ capture_isp_param.v_size =cam_context_p->capture_buffer_p+ MAX_JPEG_ENCODE_MARGIN_LEN + capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size<=cam_context_p->capture_buffer_p + MAX_CAM_CAPTURE_ISP_BUF_SIZE
最后的结果就是MAX_JPEG_ENCODE_MARGIN_LEN + capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size<=MAX_CAM_CAPTURE_ISP_BUF_SIZE；

3. 搜索MAX_CAM_CAPTURE_ISP_BUF_SIZE找到
         else
         {
            file_buffer_size = MAX_CAM_CAPTURE_MEM_BUF_SIZE;
         }

         /* solution for burst shot */
         if (cam_context_p->snapshot_number > 1)
         {
            /* to release the memory allocated in MED_MODE_BUFFER mode */
            CAM_FREE_CAPTURE_BUFFER();
            cam_context_p->capture_buffer_p = (kal_uint32) med_alloc_ext_mem(file_buffer_size);
            ASSERT (cam_context_p->capture_buffer_p ！= NULL);
            result = MED_RES_OK;
         }

中cam_context_p->capture_buffer_p = (kal_uint32) med_alloc_ext_mem(file_buffer_size);分配了首地址给cam_context_p->capture_buffer_p，大小为MAX_CAM_CAPTURE_MEM_BUF_SIZE

找到宏MAX_CAM_CAPTURE_MEM_BUF_SIZE
#define MAX_CAM_CAPTURE_ISP_TOTAL_BUF_SIZE (MAX_JPEG_ENCODE_MARGIN_LEN + MAX_SW_JPG_YUV_BUFFER_SIZE)
#define MAX_CAM_CAPTURE_ISP_BUF_SIZE (MAX_CAM_CAPTURE_ISP_TOTAL_BUF_SIZE)

知道分配大小(MAX_JPEG_ENCODE_MARGIN_LEN + MAX_SW_JPG_YUV_BUFFER_SIZE)，对比MAX_JPEG_ENCODE_MARGIN_LEN + capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size<=MAX_CAM_CAPTURE_ISP_BUF_SIZE；
知道capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size<=MAX_SW_JPG_YUV_BUFFER_SIZE

搜索MAX_SW_JPG_YUV_BUFFER_SIZE
#if defined(__SW_JPEG_CODEC_SUPPORT__)
      #if defined(__IMAGE_SENSOR_03M__)
         #define MAX_SW_JPG_YUV_BUFFER_SIZE (640*480*3/2)
      #elif defined(__IMAGE_SENSOR_1M__)
         #define MAX_SW_JPG_YUV_BUFFER_SIZE (1280*1024*3/2)
      #elif defined(__IMAGE_SENSOR_2M__)
         #define MAX_SW_JPG_YUV_BUFFER_SIZE (1600*1200*3/2)
      #elif defined(__IMAGE_SENSOR_3M__)
         #define MAX_SW_JPG_YUV_BUFFER_SIZE (2048*1536*3/2)
      #elif defined(__IMAGE_SENSOR_5M__)
         #define MAX_SW_JPG_YUV_BUFFER_SIZE (2592*1944*3/2)
知道MAX_SW_JPG_YUV_BUFFER_SIZE分配空间不够
需要在此更改大小为
#elif defined(__IMAGE_SENSOR_5M__)
        #define MAX_SW_JPG_YUV_BUFFER_SIZE (2592*1952*3/2)
为什么?由capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size的最初来源
img_width = (req_p->image_width%16==0)? req_p->image_width : 16 - (req_p->image_width%16) + req_p->image_width;
img_height = (req_p->image_height%16==0)? req_p->image_height : 16 - (req_p->image_height%16) + req_p->image_height;
cam_context_p->channel_size = img_width*img_height;
      if (capture_isp_param.jpeg_gray_mode ==0)
{
      /* color mode */
      capture_isp_param.y_size = cam_context_p->channel_size;
      capture_isp_param.u_size = cam_context_p->channel_size/4;
      capture_isp_param.v_size = cam_context_p->channel_size/4;
知道image_width和image_height应该是16的整数倍，不然会增加大小，补充相应非整数小部分，造成capture_isp_param.u_size+ capture_isp_param.y_size+ capture_isp_param.v_size>MAX_SW_JPG_YUV_BUFFER_SIZE
而MAX_SW_JPG_YUV_BUFFER_SIZE分配到的大小没有做16余数的补充~

问题2：5M的插值解决了，但是拍摄的照片有条纹
解决方案：通常是由于帧率太快
在image_sensor_OV2655.c文件中
void OV2655_Capture(image_sensor_exposure_window_struct *image_window, image_sensor_config_struct *sensor_config_data)
函数中
      if ((image_window->image_target_width<=OV2655_IMAGE_SENSOR_FULL_WIDTH)&&
      (image_window->image_target_height<=OV2655_IMAGE_SENSOR_FULL_HEIGHT))
      {
      #ifdef MCP_NOR_PAGING_MODE_PSRAM_OV2655
      OV2655_capture_pclk_in_M = 36;
      OV2655_dummy_pixels=0X300;  /*If Capture fail, you can add this dummy*/
      OV2655_dummy_lines=0;
。
。

最下面分支：else{ 处添加：
      if ((image_window->image_target_width>=2500)&&
      (image_window->image_target_height>=1900))
      {
         OV2655_write_cmos_sensor(0x3011,0x03);//48M/(3+1)=12M
               OV2655_capture_pclk_in_M = 12;
               OV2655_dummy_pixels=100;  /*If Capture fail, you can add this dummy*/
               OV2655_dummy_lines=0;

}

OV2655_write_cmos_sensor(0x3011,0x03);//48M/(3+1)=12M 改变帧率为12M
问题解决！

这个是功能机的。

是的很早之前的了智能机的插值也有，智能机插值很好做的
[DESCRIPTION]
如何实现插值
[SOLUTION]
1.For YUV sensor：
mediatek/custom/common/hal/imgsensor/cfg_ftbl_xxxxx_yuv.h
中添加对应的capture size
比如，2M的sensor插值到3M，就在capture size里添加3M的选项：
CONFIG_FEATURE_SI(FID_CAP_SIZE,
      BY_DEFAULT(CAPTURE_SIZE_2048_1536),
      CAPTURE_SIZE_320_240, CAPTURE_SIZE_640_480,
      CAPTURE_SIZE_1024_768,  APTURE_SIZE_1280_960,
      CAPTURE_SIZE_1600_1200, APTURE_SIZE_2048_1536 )
2.For RAW sensor:
mediatek/custom/ project_name/hal/camera/camera/cfg_ftbl_custom_raw_main.h
[project_name下没有的话就在mediatek/custom/ common/hal/camera/camera/cfg_ftbl_custom_raw_main.h ]
以3M插5M为例
#if 1 //  Capture Size
CONFIG_FEATURE(FID_CAP_SIZE,
      BY_DEFAULT(CAPTURE_SIZE_2560_1920),
      CAPTURE_SIZE_1280_960,
CAPTURE_SIZE_1600_1200, CAPTURE_SIZE_2048_1536,       CAPTURE_SIZE_2560_1920)
#endif

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