水印做法 / 开普饭

需求：

在camera预览，拍照，录像的图片上增加水印

处理过程：

1 png图片转化为32位bmp图片：

资源提供的是png图片，图片上的字符串是有带阴影的，背景是透明的。我们需要透明这个属性，这样在合成的时候就可以根据透明树形不去合成背景颜色，否则就出来的效果就会有底色（需要区分出底色和字里面的白色）。常规24位bmp是不带透明属性的。所以需要用FuturixImager转化成带32位的bmp图片，直接用FuturixImager打开图片，另存为就自动保存为32位bmp图片。图片如下：

2将32位bmp图片转化为yuv420 nv12格式：

基本思路是将bmp里面的数据根据yuv和rgb的转化公式转化成yuv数据格式（例如7.bmp_1272x112_yuv420p.txt），碰到位图数据透明字节=0的说明是背景像素，yuv值置为固定的magic_num(0x20),合成算法碰到这个值则忽略。所以写了个小程序：bmp2yuv420.exe，后面附上代码

3：在预览中合成生成的图片数据

在synchronous_stream_cb_routine（）合入水印数据，因为水印是黑白的，所以只需要合成y数据；有两种方法

水印图片合成方法一：

diff --git a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.cpp b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.cpp

old mode 100644

new mode 100755

index 60f7191..891d743

--- a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.cpp

+++ b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.cpp

@@ -1022,6 +1022,7 @@ QCamera2HardwareInterface::QCamera2HardwareInterface(uint32_t cameraId)

mAdvancedCaptureConfigured(false),

mFPSReconfigure(false)

{

+ mWatermarkBuf = NULL;

#ifdef TARGET_TS_MAKEUP

mMakeUpBuf = NULL;

memset(&mFaceRect, -1, sizeof(mFaceRect));

@@ -2222,6 +2223,13 @@ int QCamera2HardwareInterface::startRecording()

if (rc == NO_ERROR) {

rc = startChannel(QCAMERA_CH_TYPE_VIDEO);

}

+ if (mWatermarkBuf == NULL) {

+ int vid_width, vid_height;

+ mParameters.getVideoSize(&vid_width, &vid_height);

+ mWatermarkBuf = new unsigned char[vid_width*vid_height*3/2];

+ CDBG_HIGH("vid_width=%d,vid_height=%d",vid_width, vid_height);

+ }

#ifdef HAS_MULTIMEDIA_HINTS

if (rc == NO_ERROR) {

@@ -2259,6 +2267,11 @@ int QCamera2HardwareInterface::stopRecording()

}

#endif

+ if (mWatermarkBuf) {

+ delete []mWatermarkBuf;

+ mWatermarkBuf=NULL;

+ }

CDBG_HIGH("%s: X", __func__);

return rc;

}

diff --git a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.h b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.h

old mode 100644

new mode 100755

index 236908e..d7b0f92

--- a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.h

+++ b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWI.h

@@ -656,6 +656,11 @@ private:

int32_t mNumPreviewFaces;

bool mAdvancedCaptureConfigured;

bool mFPSReconfigure;

+ unsigned char *mWatermarkBuf;

+ bool WatermarkProcess_Video(mm_camera_buf_def_t *pFrame,QCameraStream * pStream);

+ bool WatermarkProcess(mm_camera_buf_def_t *pFrame,QCameraStream * pStream,unsigned char *pOutBuf);

// add for makeup

#ifdef TARGET_TS_MAKEUP

TSRect mFaceRect;

diff --git a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWICallbacks.cpp b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWICallbacks.cpp

old mode 100644

new mode 100755

index 9065e33..5bb2abc

--- a/hardware/qcom/camera/QCamera2/HAL/QCamera2HWICallbacks.cpp

+++ b/hardware/qcom/camera/QCamera2/HAL/QCamera2HWICallbacks.cpp

@@ -37,6 +37,7 @@

#include <utils/Trace.h>

#include <utils/Timers.h>

#include "QCamera2HWI.h"

+#include "digital_data.h"

namespace qcamera {

@@ -552,6 +553,87 @@ bool QCamera2HardwareInterface::TsMakeupProcess(mm_camera_buf_def_t *pFrame,

return bRet;

}

#endif

+bool QCamera2HardwareInterface::WatermarkProcess_Video(mm_camera_buf_def_t *pFrame,

+ QCameraStream * pStream) {

+ CDBG("%s begin",__func__);

+ bool bRet = false;

+ if (pStream == NULL || pFrame == NULL) {

+ bRet = false;

+ CDBG_HIGH("%s pStream == NULL || pFrame == NULL",__func__);

+ } else {

+ bRet = WatermarkProcess(pFrame,pStream,mWatermarkBuf);

+ }

+ CDBG("%s end bRet = %d ",__func__,bRet);

+ return bRet;

+bool QCamera2HardwareInterface::WatermarkProcess(mm_camera_buf_def_t *pFrame,

+ QCameraStream * pStream,unsigned char *pOutBuf) {

+ bool bRet = false;

+ CDBG("%s begin",__func__);

+ if (pStream == NULL || pFrame == NULL || pOutBuf == NULL) {

+ bRet = false;

+ CDBG_HIGH("%s pStream == NULL || pFrame == NULL || pMakeupOutBuf == NULL",__func__);

+ }

+ cam_dimension_t dim;

+ pStream->getFrameDimension(dim);

+ int width = dim.width;

+ int height = dim.height;

+ unsigned char *_ptr;

+ _ptr = (unsigned char*)pFrame->buffer;

+ if (NULL != _ptr) {

+ char dateTime[] = "2016-12-22 09:00:00";

+ time_t timer;

+ struct tm* t_tm;

+ time(&timer);

+ t_tm = localtime(&timer);

+ memset(dateTime, 0, sizeof(dateTime));

+ sprintf(dateTime,"%4d-%02d-%02d %02d:%02d:%02d", t_tm->tm_year+1900, t_tm->tm_mon+1, t_tm->tm_mday, t_tm->tm_hour, t_tm->tm_min, t_tm->tm_sec);

+ ALOGE("========== timestampUs:%d, systemTime():%d, dateTime:%s",timestampUs, systemTime()/1000, dateTime);

+ int digitalNums[10+8+1+ 1] = {-1}; // 10:- 11 :: 12:blank

+ memset(digitalNums, -1, sizeof(digitalNums));

+ for(int i = 0; i<19; i++){

+ char num = dateTime[i];

+ if(('0' <= num) && (num <= '9'))

+ {

+ digitalNums[i] = num - '0';

+ }else if(num == '-'){

+ digitalNums[i] = 10;

+ }else if(num == ':'){

+ digitalNums[i] = 11;

+ }else if(num == ' '){

+ digitalNums[i] = 12;

+ }

+ //for 1280 x 960

+ int left_offset = 776; // width - digital_width * srtlen(dateTime) - digital_width * 2

+ int top_offset = 860; // height - 100

+ for(int j = 0; j<digital_height; j++) {

+ for(volatile int k=0; k<19; k++) {

+ const unsigned char* str = (digitalNums[k] < 12 && digitalNums[k] != -1) ? DigitalArray[digitalNums[k]] : NULL;

+ if(str != NULL) {

+ for(volatile int h=0; h<digital_width; h++) {

+ if(*(str+(digital_height - 1 - j)*digital_width + h) != 0x00) {

+ *(_ptr+top_offset*width + left_offset + j*width + k*(gap_width+digital_width) + h) = *(str+(digital_height - 1 - j)*digital_width + h);

+ }

+ CDBG("%s end bRet = %d ",__func__,bRet);

+ return bRet;

/*===========================================================================

* FUNCTION : postproc_channel_cb_routine

@@ -1119,6 +1201,9 @@ void QCamera2HardwareInterface::video_stream_cb_routine(mm_camera_super_buf_t *s

return;

}

mm_camera_buf_def_t *frame = super_frame->bufs[0];

+ //add

+ pme->WatermarkProcess_Video(frame,stream);

if (pme->needDebugFps()) {

pme->debugShowVideoFPS();

digital_data.h：

const unsigned char digital_0[912] = {

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,

0xff,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,

0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,

0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,

0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0x00,

0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0x00,0x00,