msm7x27a添加camera差值以及添加新拍照分辨率尺寸

转载自http://blog.csdn.net/dwyane_zhang/article/details/8889196

前段时间客户要求在高通7系列上加camera的差值，所以个人研究了一下这个差值的做法。

首先贴上要加载的文件的地址：

vendor/qcom/android-open/libcamera2/QualcommCameraHardware.cpp

vendor/qcom/proprietary/mm-camera/apps/appslib/snapshot.c

vendor/qcom/proprietary/mm-camera/common/mm_camera_interface.h

1.首先看mm_camera_interface.h

typedef struct {
struct camera_size_type mIn;
struct camera_size_type mOut;
int8_t mEnable;
}interpolaton_info_t;

interpolaton_info_t  *p_interpolaton_info;

//添加差值结构体定义interpolaton_info_t并申请变量*p_interpolaton_info。

2. 查看QualcommCameraHardware.cpp

static interpolaton_info_t  mInterpolatonInfo;    //定义变量

bool QualcommCameraHardware::startCamera()
{
    LOGV("startCamera E");

   。。。

    if (pthread_join(mDeviceOpenThread, NULL) != 0) {
         LOGE("openCamera thread exit failed");
         return false;
    }

    mCfgControl.mm_camera_query_parms(CAMERA_PARM_PICT_SIZE, (void **)&picture_sizes, &PICTURE_SIZE_COUNT);
#ifdef  HAVE_SW_CAM_IMAGE_INTERPOLATION  
/* max pict size supported by cureent yuv sensor is 5M,how to change?
*   eg:if(picture_sizes->width == 2592 && picture_sizes->height == 1944)---->8MP
*        if(picture_sizes->width == 3200 && picture_sizes->height == 2400)---->12MP
*          ...... 
*        and so on
*  { 4000, 3000}, // 12MP
*  { 3200, 2400}, // 8MP
*  { 2592, 1944}, // 5MP
*  { 2048, 1536}, // 3MP QXGA
*  { 1920, 1080}, //HD1080
*  { 1600, 1200}, // 2MP UXGA
*  { 1280, 768}, //WXGA
*  { 1280, 720}, //HD720
*  { 1024, 768}, // 1MP XGA
*  { 800, 600}, //SVGA
*  { 800, 480}, // WVGA
*  { 640, 480}, // VGA
*  { 352, 288}, //CIF
*  { 320, 240}, // QVGA
*  { 176, 144} // QCIF
*
*/
memset(&mInterpolatonInfo,0,sizeof(interpolaton_info_t));
if(picture_sizes->width == 640 &&  picture_sizes->height == 480)   //这里是添加差值的起步点，从拍照640x480开始差值，即30万开始。
{
LOGE("zzb change the supported pict sizes before(%d,%d)",picture_sizes->width,picture_sizes->height);
mInterpolatonInfo.mIn = *picture_sizes;
picture_sizes -= 1;   //把拍照的指针向前移一位（根据要求可以移自己想要的位置）
PICTURE_SIZE_COUNT += 1;   //这个是和上面的picture_sizes相对应的
mInterpolatonInfo.mOut = *picture_sizes;     //这个是差值的输出分辨率
mInterpolatonInfo.mEnable = false;
LOGE("zm change the supported pict sizes after(%d,%d)",picture_sizes->width,picture_sizes->height);
}
#endif

if ((picture_sizes == NULL) || (!PICTURE_SIZE_COUNT)) {
        LOGE("startCamera X: could not get snapshot sizes");
        return false;
    }

。。。

}     // END startCamera()

bool QualcommCameraHardware::initImageEncodeParameters(int size)
{
    LOGV("%s: E", __FUNCTION__);

memset(&mImageEncodeParms, 0, sizeof(encode_params_t));
    int jpeg_quality = mParameters.getInt("jpeg-quality");
    bool ret;
#ifdef HAVE_SW_CAM_IMAGE_INTERPOLATION
//zm
    mImageEncodeParms.p_interpolaton_info = &mInterpolatonInfo;
#endif
    if (jpeg_quality >= 0) {
        LOGV("initJpegParameters, current jpeg main img quality =%d",
             jpeg_quality);
        //Application can pass quality of zero
        //when there is no back sensor connected.
        //as jpeg quality of zero is not accepted at
        //camera stack, pass default value.
        if(jpeg_quality == 0) jpeg_quality = 85;
        mImageEncodeParms.quality = jpeg_quality;
        ret = native_set_parms(CAMERA_PARM_JPEG_MAINIMG_QUALITY, sizeof(int), &jpeg_quality);
        if(!ret){
          LOGE("initJpegParametersX: failed to set main image quality");
          return false;
        }
    }

   。。。

}      //END  initImageEncodeParameters(int size)

CameraParameters QualcommCameraHardware::getParameters() const
{
    LOGV("getParameters: EX");
#ifdef HAVE_SW_CAM_IMAGE_INTERPOLATION
//zm
LOGE("zm:getParameters:state%d,in(%d,%d),out(%d,%d)",mInterpolatonInfo.mEnable,mInterpolatonInfo.mIn.width,mInterpolatonInfo.mIn.height,mInterpolatonInfo.mOut.width,mInterpolatonInfo.mOut.height);
if(mInterpolatonInfo.mEnable)
{
CameraParameters para = mParameters;
para.setPictureSize(mInterpolatonInfo.mOut.width,mInterpolatonInfo.mOut.height);      //设置为输出差值分辨率的值
return para;
}
#endif
    return mParameters;
}  //END  getParameters()

status_t QualcommCameraHardware::setPictureSize(const CameraParameters& params)
{
    int width, height;
    params.getPictureSize(&width, &height);
    LOGV("requested picture size %d x %d", width, height);

#ifdef HAVE_SW_CAM_IMAGE_INTERPOLATION
    LOGE("zm requested picture size %d x %d", width, height);
//zm
//support 1MP XGA-> SVGA -> WVGA    modify by zhangmin 2013.4.25 {begain
if(width == 1024 && height == 768)         //根据要求菜单的拍照分辨率导出差值分辨率的值
//if(mInterpolatonInfo.mOut.width == width && mInterpolatonInfo.mOut.height == height)
{
mInterpolatonInfo.mEnable = true;
width = mInterpolatonInfo.mIn.width;          //这个是基值（即差值的起始点）
height = mInterpolatonInfo.mIn.height;
mInterpolatonInfo.mOut.width = 1024;      //这个是输出要差值的分辨率
mInterpolatonInfo.mOut.height = 768;
LOGE("zm chg picture size %d x %d", width, height);
}
else if(width == 1280 && height == 960)   // output 1280x960 
{
mInterpolatonInfo.mEnable = true;
width = mInterpolatonInfo.mIn.width;
height = mInterpolatonInfo.mIn.height;
mInterpolatonInfo.mOut.width = 1280;
mInterpolatonInfo.mOut.height = 960;
LOGE("zm chg picture size %d x %d", width, height);
}
else if(width == 800 && height == 600)
{
mInterpolatonInfo.mEnable = true;
width = mInterpolatonInfo.mIn.width;
height = mInterpolatonInfo.mIn.height;
mInterpolatonInfo.mOut.width = 800;
mInterpolatonInfo.mOut.height = 600;
LOGE("zm 600 chg picture size %d x %d", width, height);
}
else if(width == 800 && height == 480)
{
mInterpolatonInfo.mEnable = true;
width = mInterpolatonInfo.mIn.width;
height = mInterpolatonInfo.mIn.height;
mInterpolatonInfo.mOut.width = 800;
mInterpolatonInfo.mOut.height = 480;
LOGE("zm 480 chg picture size %d x %d", width, height);
}
else
{
mInterpolatonInfo.mEnable = false;
}
//support 1MP XGA-> SVGA -> WVGA    modify by zhangmin 2013.4.25 }end
#endif

    // Validate the picture size
    for (int i = 0; i < supportedPictureSizesCount; ++i) {
        if (width == picture_sizes_ptr[i].width
          && height == picture_sizes_ptr[i].height) {
            mParameters.setPictureSize(width, height);
            mDimension.picture_width = width;
            mDimension.picture_height = height;
            return NO_ERROR;
        }
    }

    。。。

}   END setPictureSize(const CameraParameters& params)

3. 添加snapshot.c    //主要是差值图像的编码

void* encode_thread_func(void *data)
{
  mm_camera_status_t status = MM_CAMERA_SUCCESS;
  snapshot_context_t* context = (snapshot_context_t *)data;
  struct msm_frame* main_frame = NULL;
  struct msm_frame* thumb_frame = NULL;

    。。。

    pthread_mutex_lock(&encode_thread_mutex);
    if (context->encode_thread_exit) {
      pthread_mutex_unlock(&encode_thread_mutex);
      CDBG("%s encode_thread_exit", __func__);
      goto encode_func_end;
    }
#ifdef HAVE_SW_CAM_IMAGE_INTERPOLATION
//zm
{
  common_crop_t * crop1 = (common_crop_t *)main_frame->cropinfo;
  CDBG("zzb:buffer %d vaddr %p \n", main_frame->path,(void *)main_frame->buffer);
  CDBG("zzb: Scaling params thumb in1_w %d in1_h %d out1_w %d out1_h %d "
       "main_img in2_w %d in2_h %d out2_w %d out2_h %d\n",
         crop1->in1_w, crop1->in1_h,
         crop1->out1_w, crop1->out1_h,
         crop1->in2_w, crop1->in2_h,
         crop1->out2_w, crop1->out2_h);
}


if(main_frame != NULL && context->encode_params.p_interpolaton_info != NULL && context->encode_params.p_interpolaton_info->mEnable)
{
       common_crop_t * crop = (common_crop_t *)main_frame->cropinfo;
  CDBG("zzb change the crop info");
if(crop->in2_w  ==0 && crop->in2_h == 0)
{
crop->in2_w = context->encode_params.p_interpolaton_info->mIn.width;
crop->in2_h = context->encode_params.p_interpolaton_info->mIn.height;
}
crop->out2_w = context->encode_params.p_interpolaton_info->mOut.width;
crop->out2_h = context->encode_params.p_interpolaton_info->mOut.height;
}
#endif

#ifdef  _TARGET_7x2x_
    status = snapshot_jpeg_encode(context, main_frame, thumb_frame);
#else
    status = snapshot_jpeg_encode(context, main_frame);
#endif

     。。。

}       // End  encode_thread_func(void *data)

这样整个差值添加的就做完了，美妙的差值就实现了！嘿嘿。。。

上面实现了camera的差值，现在又有一个难题，什么呢？还不是客户成天没事做想些东西折腾我们苦逼的工程师，

比如我们差值到720p的了（1280x720）,客户觉得预览的黑边太大，要求拍照分辨率为（1280x960）这个是130万的。

肿么办？现在现有的如下

static struct camera_size_type default_picture_sizes[] = {
  { 4000, 3000}, // 12MP
  { 3200, 2400}, // 8MP
  { 2592, 1944}, // 5MP
  { 2048, 1536}, // 3MP QXGA
  { 1920, 1080}, //HD1080
  { 1600, 1200}, // 2MP UXGA
  { 1280, 768}, //WXGA
  { 1280, 720}, //HD720
  { 1024, 768}, // 1MP XGA
  { 800, 600}, //SVGA
  { 800, 480}, // WVGA
  { 640, 480}, // VGA
  { 352, 288}, //CIF
  { 320, 240}, // QVGA
  { 176, 144} // QCIF
};

现在只有1280x768 和 1600x1200,中间少了1280x960。所以我们又要满足人家要求呗，添加。。。

首先在这个数组里面添加一项 1280x960  //在文件vendor/qcom/properietary/mm-camera/apps/appslib/mm_camera_inerface.c

然后在packages/apps/Camera/res/values/文件夹下修改arrays.xml   strings.xml

这两个问价属于camera的菜单项，需要在这里把菜单加进去。

首先修改arrays.xml

红色代表新添加的菜单

 <!-- Camera Preferences Picture size dialog box entries -->
    <string-array name="pref_camera_picturesize_entries" translatable="false">
        <!-- TODO: Change to a better name of the preference.
                The first element of the array sould be
                "pref_camera_picturesize_entry_2592x1944". However, we are too
                late for the translation. Since we show the same label as the
                second item, we just use the second one instead.
        -->
        <item>@string/pref_camera_picturesize_entry_4000x3000</item>
        <item>@string/pref_camera_picturesize_entry_3200x2400</item>
        <item>@string/pref_camera_picturesize_entry_2592x1936</item>
        <item>@string/pref_camera_picturesize_entry_2592x1936</item>
        <item>@string/pref_camera_picturesize_entry_2592x1936</item>
        <item>@string/pref_camera_picturesize_entry_2048x1536</item>
        <item>@string/pref_camera_picturesize_entry_1920x1080</item>
        <item>@string/pref_camera_picturesize_entry_1600x1200</item>
        <item>@string/pref_camera_picturesize_entry_1280x768</item>
        <item>@string/pref_camera_picturesize_entry_1280x720</item>
        <item>@string/pref_camera_picturesize_entry_1024x768</item>
        <item>@string/pref_camera_picturesize_entry_800x600</item>
        <item>@string/pref_camera_picturesize_entry_800x480</item>
        <item>@string/pref_camera_picturesize_entry_1280x960</item>
        <item>@string/pref_camera_picturesize_entry_640x480</item>
        <item>@string/pref_camera_picturesize_entry_352x288</item>
        <item>@string/pref_camera_picturesize_entry_320x240</item>
        <item>@string/pref_camera_picturesize_entry_176x144</item>
    </string-array>


    <!-- When launching the camera app first time, we will set the picture
         size to the first one in the list that is also supported by the
         driver -->

 <string-array name="pref_camera_picturesize_entryvalues" translatable="false">
        <item>4000x3000</item>
        <item>3200x2400</item>
        <item>2592x1944</item>
        <item>2592x1936</item>
        <item>2560x1920</item>
        <item>2048x1536</item>
        <item>1920x1080</item>
        <item>1600x1200</item>
        <item>1280x768</item>
        <item>1280x720</item>
        <item>1024x768</item>
        <item>800x600</item>
        <item>800x480</item>
        <item>1280x960</item>
        <item>640x480</item>
        <item>352x288</item>
        <item>320x240</item>
        <item>176x144</item>
    </string-array>

    <!-- Camera Preferences Picture format dialog box entries -->

其次修改 strings.xml 

红色是添加的菜单

<!-- Settings screen, Picture size dialog radio button choices -->
    <string name="pref_camera_picturesize_entry_4000x3000">12M Pixels</string>
    <string name="pref_camera_picturesize_entry_3200x2400">8M Pixels</string>
    <string name="pref_camera_picturesize_entry_2592x1936">5M Pixels</string>
    <string name="pref_camera_picturesize_entry_2048x1536">3M Pixels</string>
    <string name="pref_camera_picturesize_entry_1920x1080">HD1080</string>
    <string name="pref_camera_picturesize_entry_1600x1200">2M Pixels</string>
    <string name="pref_camera_picturesize_entry_1280x960">1.3M Pixels</string>
    <string name="pref_camera_picturesize_entry_1280x768">WXGA</string>
    <string name="pref_camera_picturesize_entry_1280x720">HD720</string>
    <string name="pref_camera_picturesize_entry_1024x768">1M Pixels</string>
    <string name="pref_camera_picturesize_entry_800x600">SVGA</string>
    <string name="pref_camera_picturesize_entry_800x480">WVGA</string>
    <string name="pref_camera_picturesize_entry_640x480">VGA</string>
    <string name="pref_camera_picturesize_entry_352x288">CIF</string>
    <string name="pref_camera_picturesize_entry_320x240">QVGA</string>
    <string name="pref_camera_picturesize_entry_176x144">QCIF</string>

这样又有一个神奇的1.3M的菜单显现在你面前。