RK3288[android 7.1]調試筆記 修改默認的PreviewSize預覽分辨率和PictureSize照片大小
從log中知道自帶攝像頭應用是會根據支持的分辨率並結合屏的分辨率去選擇最優分辨率的
01-18 16:52:13.918 226 706 I CameraHal: initDefaultParameters(170): dsy log:initDefaultParameters(170): params.setPreviewSize(1280,720); //這裏我設定PreviewSize預覽分辨率是1280x720 即16:9
01-18 16:52:13.918 226 706 I CameraHal: initDefaultParameters(180): dsy log:initDefaultParameters(180): params.setPreviewSize(mCamDriverFrmWidthMax,mCamDriverFrmHeightMax);
01-18 16:52:13.933 537 1026 E ActivityThread: Failed to find provider info for com.android.calendar
01-18 16:52:13.935 537 1026 E ActivityThread: Failed to find provider info for com.android.calendar
01-18 16:52:13.957 226 706 E CameraHal: initDefaultParameters(529): initDefaultParameters(529): mCamDriverCapability.card is error!
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(594): mIsCtsTest:0 Support video sizes:(null)
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(611): Support Preview format: yuv420sp,yuv420p .. yuv420sp
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(613): Support Preview sizes: 1280x720,640x480,352x288,320x240,176x144,160x120,1280x800 1280x720 //這裏可以看到支持的PreviewSize預覽分辨率 和自己設定的分辨率
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(614): Support Preview FPS range: (30000,30000)
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(615): Support Preview framerate: 30
01-18 16:52:13.957 226 706 D CameraHal: initDefaultParameters(616): Support Picture sizes: 1280x720,640x480,352x288,320x240,176x144,160x120,1280x800 //這裏可以看到支持的PictureSize照片大小的分辨率 和自己設定的分辨率，照片大小默認是選擇最大的分辨率
01-18 16:52:32.048 1905 1905 D CAM_ResolutionSettings: camera CameraId{Api2='0',Api1:0} getPictureSize
01-18 16:52:32.049 1905 1905 V CAM_PhotoModule: setting preview size. optimal: 1280x800original: 1280x720 //這裏看到最優預覽分辨率是1280x800即8:5，設定的預覽分辨率是1280x720 即16:9
01-18 16:52:32.056 226 2085 D CameraHal: cameraConfig(893): cameraConfig(893): Set anti-banding Disabled
01-18 16:52:32.056 226 2085 D CameraHal: isNeedToRestartPreview(168): mPreviewFrame2AppW (1280x720)
01-18 16:52:32.056 226 2085 D CameraHal: isNeedToRestartPreview(169): mCamPreviewW (0x0)
01-18 16:52:32.056 226 2085 D CameraHal: isNeedToRestartPreview(170): video width (1280x720)
01-18 16:52:32.058 226 2085 D CameraHal: setParameters(700): suppport focus modes:fixed, expect:fixed
01-18 16:52:32.058 226 2085 D CameraHal: isNeedToRestartPreview(168): mPreviewFrame2AppW (1280x720)
01-18 16:52:32.058 226 2085 D CameraHal: isNeedToRestartPreview(169): mCamPreviewW (0x0)
01-18 16:52:32.058 226 2085 D CameraHal: isNeedToRestartPreview(170): video width (1280x720)
01-18 16:52:32.061 226 2085 D CameraHal: setParameters(660): setParameters(660): Set preview size 1280x800//看到設定的分辨率並不生效，相機自動選擇最優的預覽分辨率
01-18 16:52:32.061 226 2085 D CameraHal: setParameters(676): setParameters(676): Set picture size 1280x800//生成照片的分辨率默認是選擇最大即1280x800
01-18 16:52:32.061 226 2085 D CameraHal: setParameters(700): suppport focus modes:fixed, expect:fixed
01-18 16:52:32.061 226 2085 D CameraHal: isNeedToRestartPreview(168): mPreviewFrame2AppW (1280x800)
01-18 16:52:32.061 226 2085 D CameraHal: isNeedToRestartPreview(169): mCamPreviewW (0x0)
01-18 16:52:32.061 226 2085 D CameraHal: isNeedToRestartPreview(170): video width (1280x800)
01-18 16:52:32.063 1905 1905 V CAM_PhotoModule: updating aspect ratio
01-18 16:52:32.063 1905 1905 V CAM_TexViewHelper: updateAspectRatio 1.6
01-18 16:52:32.063 1905 1905 V CAM_TexViewHelper: setAspectRatio: 1.6
01-18 16:52:32.063 1905 1905 V CAM_TexViewHelper: aspect ratio changed from: 0.0
01-18 16:52:32.063 1905 1905 V CAM_TexViewHelper: updateTransform
01-18 16:52:32.063 1905 1905 D CAM_PhotoModule: Preview size is 1280x800//最終看到設定的分辨率並不生效，相機自動選擇最優的預覽分辨率1280x800
01-18 16:52:32.064 1905 1905 V CAM_FocusOverlayMgr: stored focus setting for camera: continuous-picture
解決方法在路徑爲/hardware/rockchip/camera/CameraHal/CameraUSBAdapter.cpp文件中可以自行定製預覽分辨分辨率，把1280x720設爲最大的分辨率爲預覽。
wangxd@build-server-100:~/work/dsy/rk3288-Android-7.0/hardware/rockchip/camera((1d71794...))$ git diff CameraHal/CameraUSBAdapter.cpp
diff --git a/CameraHal/CameraUSBAdapter.cpp b/CameraHal/CameraUSBAdapter.cpp
index b565930..78c16a0 100755
--- a/CameraHal/CameraUSBAdapter.cpp
+++ b/CameraHal/CameraUSBAdapter.cpp
@@ -164,15 +164,16 @@ void CameraUSBAdapter::initDefaultParameters(int camFd)
params.set(KEY_PREVIEW_W_FORCE,"0");
params.set(KEY_PREVIEW_H_FORCE,"0");
- params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, parameterString.string());
- if(parameterString.contains("640x480"))
- params.setPreviewSize(640,480);
- else
+ // params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, parameterString.string());
+ params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, "1280x720,640x480,352x288,320x240,176x144,160x120");
+ if(parameterString.contains("1280x720")) //.contains方法---如果1280x720有包含在支持分辨率KEY_SUPPORTED_PREVIEW_SIZES "1280x720,640x480,352x288,320x240,176x144,160x120"中爲真，否則爲假
+ params.setPreviewSize(1280,720);
+ else
params.setPreviewSize(mCamDriverFrmWidthMax,mCamDriverFrmHeightMax);
/*picture size setting*/
- params.set(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES, parameterString.string());
- params.setPictureSize(mCamDriverFrmWidthMax, mCamDriverFrmHeightMax);
+ params.set(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES, "1280x720,640x480,352x288,320x240,176x144,160x120");
+ // params.setPictureSize(mCamDriverFrmWidthMax,mCamDriverFrmHeightMax);
+ params.setPictureSize(1280,720);
/* set framerate */
struct v4l2_streamparm setfps;
int fps_min,fps_max;
最終成功可以看到把1280x720（16:9）設置爲默認預覽分辨率