{"id":1096,"date":"2021-03-23T16:33:43","date_gmt":"2021-03-23T08:33:43","guid":{"rendered":"http:\/\/www.max-shu.com\/blog\/?p=1096"},"modified":"2021-03-23T16:33:43","modified_gmt":"2021-03-23T08:33:43","slug":"%e5%9b%9b%e8%b7%afnv12%ef%bc%88yuv420sp%ef%bc%89%e7%9a%84%e5%b8%a7%e6%8b%bc%e6%8e%a5%e6%88%90%e4%b8%80%e4%b8%aanv12%e7%9a%84%e5%b8%a7","status":"publish","type":"post","link":"http:\/\/www.max-shu.com\/blog\/?p=1096","title":{"rendered":"\u56db\u8defNV12\uff08YUV420SP\uff09\u7684\u5e27\u62fc\u63a5\u6210\u4e00\u4e2aNV12\u7684\u5e27"},"content":{"rendered":"<p>\u56db\u8defNV12\uff08YUV420SP\uff09\u7684\u5e27\u62fc\u63a5\u6210\u4e00\u4e2aNV12\u7684\u5e27\uff0c\u5176\u539f\u7406\u5c31\u662f\u6839\u636eyuv\u6570\u636e\u7ec4\u6210\u65b9\u5f0f\uff0c\u628a\u6bcf\u8def\u5e27\u7684\u6570\u636e\u653e\u5230\u5355\u5e27\u76f8\u5e94\u4f4d\u7f6e\u3002<\/p>\n<p>\u5916\u90e8\u8c03\u7528\u7684\u8bdd\uff0c\u5148MergeStart\uff0c\u7136\u540ePutMergeData\uff0c\u6700\u540eMergeStop\uff0c\u751f\u6210\u7684\u56fe\u50cf\u653e\u5728gYuvMergedData\u4e2d\uff0c\u683c\u5f0f\u8fd8\u662fnv12\u7684\u683c\u5f0f\uff0c\u5916\u90e8\u7ebf\u7a0b\u8981\u4f7f\u7528\u8be5\u6570\u636e\u7684\u8bdd\uff0c\u4ee3\u7801\u91cc\u6700\u597d\u518d\u52a0\u4e0a\u4e92\u65a5\u9501\uff0c\u9632\u6b62\u64cd\u4f5c\u4e00\u5e27\u7684\u90e8\u5206\u6570\u636e\u7684\u60c5\u51b5\u3002<\/p>\n<div>\n<div>#include\u00a0&lt;stdio.h&gt;<\/div>\n<div>#include\u00a0&lt;stdint.h&gt;<\/div>\n<div>#include\u00a0&lt;assert.h&gt;<\/div>\n<div>#include\u00a0&lt;atomic&gt;<\/div>\n<div>#include\u00a0&lt;memory.h&gt;<\/div>\n<div>#include\u00a0&lt;pthread.h&gt;<\/div>\n<div>#include\u00a0&lt;stdlib.h&gt;<\/div>\n<div>#include\u00a0&lt;fcntl.h&gt;<\/div>\n<div>#include\u00a0&lt;stdio.h&gt;<\/div>\n<div>#include\u00a0&lt;string.h&gt;<\/div>\n<div>#include\u00a0&lt;unistd.h&gt;<\/div>\n<div>#define\u00a0CAMERA_WIDTH\u00a01280<\/div>\n<div>#define\u00a0CAMERA_HEIGHT\u00a0720<\/div>\n<div>#define\u00a0MAX_MERGE_NUM\u00a04<\/div>\n<div>extern\u00a0void\u00a0MergeDraw(unsigned\u00a0char\u00a0*yuvMergedData);<\/div>\n<div>extern\u00a0const\u00a0char\u00a0*TAG;<\/div>\n<div>bool\u00a0gIsMergeFlag\u00a0=\u00a0true;<\/div>\n<div>int\u00a0gMergeInitCameraNum\u00a0=\u00a00;<\/div>\n<div>pthread_t\u00a0gMergeThread\u00a0=\u00a00;<\/div>\n<div>unsigned\u00a0char\u00a0*gYuvMergedData;<\/div>\n<div>typedef\u00a0struct\u00a0_MERGEDATA{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0bool\u00a0isUsed;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0uint32_t\u00a0cameraId;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0unsigned\u00a0char\u00a0*yuvData;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0pthread_mutex_t\u00a0mutex;\u00a0\/\/\u4e92\u65a5\u9501<\/div>\n<div>}\u00a0MERGEDATA;<\/div>\n<div>MERGEDATA\u00a0gMergeData[MAX_MERGE_NUM];<\/div>\n<div>int\u00a0MergeDataGetIndex(uint32_t\u00a0cameraId){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0for(int\u00a0i=0;\u00a0i&lt;MAX_MERGE_NUM;\u00a0i++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(gMergeData[i].isUsed\u00a0&amp;&amp;\u00a0gMergeData[i].cameraId\u00a0==\u00a0cameraId)<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0i;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeDataGetIndex:\u00a0Can&#8217;t\u00a0Get\u00a0Camera\u00a0Index,\u00a0cameraId:%u&#8221;,\u00a0cameraId);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>}<\/div>\n<div>int\u00a0MergeDataInsert(uint32_t\u00a0cameraId){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0for(int\u00a0i=0;\u00a0i&lt;MAX_MERGE_NUM;\u00a0i++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(gMergeData[i].isUsed\u00a0&amp;&amp;\u00a0gMergeData[i].cameraId\u00a0==\u00a0cameraId){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeDataInsert:\u00a0Have\u00a0exist\u00a0same\u00a0cameraId:%u&#8221;,\u00a0cameraId);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-2;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0for(int\u00a0i=0;\u00a0i&lt;MAX_MERGE_NUM;\u00a0i++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(!gMergeData[i].isUsed){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gMergeData[i].isUsed\u00a0=\u00a0true;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if\u00a0(pthread_mutex_init(&amp;(gMergeData[i].mutex),\u00a0NULL)\u00a0!=\u00a00){\u00a0\/\/init\u00a0fail<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeDataInsert:\u00a0pthread_mutex_init\u00a0error.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0i;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeDataInsert:\u00a0gMergeData\u00a0is\u00a0full.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>}<\/div>\n<div>int\u00a0MergeDataDelete(uint32_t\u00a0cameraId){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0for(int\u00a0i=0;\u00a0i&lt;MAX_MERGE_NUM;\u00a0i++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(gMergeData[i].isUsed\u00a0&amp;&amp;\u00a0gMergeData[i].cameraId\u00a0==\u00a0cameraId){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gMergeData[i].cameraId\u00a0=\u00a00;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0free(gMergeData[i].yuvData);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pthread_mutex_destroy(&amp;(gMergeData[i].mutex));<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gMergeData[i].isUsed\u00a0=\u00a0false;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0i;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeDataDelete:\u00a0Can&#8217;t\u00a0Get\u00a0Surface\u00a0Index,\u00a0cameraId:%u&#8221;,\u00a0cameraId);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>}<\/div>\n<div>\/\/\u5fc5\u987b\u7ebf\u7a0b\u65b9\u5f0f\u6765\u5408\u5e76<\/div>\n<div>void\u00a0*thread_merge(void\u00a0*unused)\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logI(TAG,\u00a0&#8220;Enter\u00a0thread_merge&#8221;);<\/div>\n<div><\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\/\/\u00a0merge<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0while\u00a0(gIsMergeFlag)\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0uint64_t\u00a0yMergedStart\u00a0=\u00a00;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0uint64_t\u00a0uvMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*4;\u00a0\/\/4\u753b\u9762\u5408\u5e76<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for(int\u00a0cameraDataIndex=0;\u00a0cameraDataIndex&lt;MAX_MERGE_NUM;\u00a0cameraDataIndex++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/logI(TAG,\u00a0&#8220;thread_merge:\u00a0start\u00a0merge,\u00a0cameraDataIndex:\u00a0%u&#8221;,\u00a0cameraDataIndex);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if\u00a0(pthread_mutex_lock(&amp;(gMergeData[cameraDataIndex].mutex))\u00a0!=\u00a00){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;thread_merge:\u00a0pthread_mutex_lock\u00a0error.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for(int\u00a0line=0;\u00a0line&lt;CAMERA_HEIGHT;\u00a0line++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0memcpy(gYuvMergedData+yMergedStart+CAMERA_WIDTH*2*line,\u00a0&amp;(gMergeData[cameraDataIndex].yuvData[CAMERA_WIDTH*line]),\u00a0CAMERA_WIDTH);\u00a0\u00a0\/\/Y\u00a0Plane\u00a0data,\u00a0\u62f7\u8d1d\u4e00\u884c<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for(int\u00a0line=0;\u00a0line&lt;CAMERA_HEIGHT\/2;\u00a0line++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0memcpy(gYuvMergedData+uvMergedStart+CAMERA_WIDTH*2*line,<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&amp;(gMergeData[cameraDataIndex].yuvData[CAMERA_WIDTH*CAMERA_HEIGHT+CAMERA_WIDTH*line]),\u00a0CAMERA_WIDTH);\u00a0\u00a0\/\/UV\u00a0Plane\u00a0data,\u00a0\u62f7\u8d1d\u4e00\u884c<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pthread_mutex_unlock(&amp;(gMergeData[cameraDataIndex].mutex));<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0switch(cameraDataIndex){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0case\u00a00:<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0yMergedStart\u00a0=\u00a0CAMERA_WIDTH;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0uvMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*4\u00a0+\u00a0CAMERA_WIDTH;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0break;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0case\u00a01:<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0yMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*2;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0uvMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*4\u00a0+\u00a0CAMERA_WIDTH*CAMERA_HEIGHT;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0break;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0case\u00a02:<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0yMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*2\u00a0+\u00a0CAMERA_WIDTH;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0uvMergedStart\u00a0=\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*4\u00a0+\u00a0CAMERA_WIDTH*CAMERA_HEIGHT\u00a0+\u00a0CAMERA_WIDTH;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0break;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/logI(TAG,\u00a0&#8220;thread_merge:\u00a0start\u00a0draw.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MergeDraw(gYuvMergedData);\u00a0\/\/\u6d4b\u8bd5\u7528\uff0c\u753b\u5230Surface\u4e0a\u770b\u6548\u679c\u3002<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0usleep(1000\u00a0*\u00a033);\u00a0\/\/\u00a030\u00a0frames\/second<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0for(int\u00a0cameraDataIndex=0;\u00a0cameraDataIndex&lt;MAX_MERGE_NUM;\u00a0cameraDataIndex++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MergeDataDelete(gMergeData[cameraDataIndex].cameraId);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0free(gYuvMergedData);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gMergeInitCameraNum\u00a0=\u00a00;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gIsMergeFlag\u00a0=\u00a0true;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logI(TAG,\u00a0&#8220;Exit\u00a0thread_merge.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a0NULL;<\/div>\n<div>}<\/div>\n<div>int\u00a0PutMergeData(uint32_t\u00a0cameraID,\u00a0unsigned\u00a0char\u00a0*cameraData)\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\/\/logI(TAG,\u00a0&#8220;PutMergeData:\u00a0cameraID:\u00a0%u&#8221;,\u00a0cameraID);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0int\u00a0cameraDataIndex\u00a0=\u00a0MergeDataGetIndex(cameraID);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0if(cameraDataIndex\u00a0&lt;\u00a00){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;PutMergeData:\u00a0MergeDataGetIndex\u00a0error,\u00a0cameraDataIndex:\u00a0%u&#8221;,cameraDataIndex);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\/\/\u00a0camera\u00a0data<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0if\u00a0(pthread_mutex_lock(&amp;(gMergeData[cameraDataIndex].mutex))\u00a0!=\u00a00){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;PutMergeData:\u00a0pthread_mutex_lock\u00a0error,\u00a0cameraDataIndex:\u00a0%u&#8221;,cameraDataIndex);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0memcpy(gMergeData[cameraDataIndex].yuvData,\u00a0cameraData,\u00a0CAMERA_WIDTH*CAMERA_HEIGHT*3\/2);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0pthread_mutex_unlock(&amp;(gMergeData[cameraDataIndex].mutex));<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a00;<\/div>\n<div>}<\/div>\n<div>int\u00a0MergeStart(uint32_t\u00a0cameraID)\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logI(TAG,\u00a0&#8220;MergeStart:\u00a0cameraID:\u00a0%u&#8221;,\u00a0cameraID);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0int\u00a0cameraDataIndex\u00a0=\u00a0MergeDataInsert(cameraID);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0if(cameraDataIndex\u00a0&lt;\u00a00){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeStart:\u00a0MergeDataInsert\u00a0error,\u00a0cameraDataIndex:&#8221;,cameraDataIndex);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logI(TAG,\u00a0&#8220;MergeStart:\u00a0cameraDataIndex:\u00a0%u&#8221;,\u00a0cameraDataIndex);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gMergeData[cameraDataIndex].yuvData\u00a0=\u00a0(unsigned\u00a0char\u00a0*)malloc(CAMERA_WIDTH*CAMERA_HEIGHT*3\/2);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gMergeData[cameraDataIndex].cameraId\u00a0=\u00a0cameraID;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gMergeInitCameraNum\u00a0++;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0if(gMergeInitCameraNum\u00a0&gt;=\u00a04){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gIsMergeFlag\u00a0=\u00a0true;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gYuvMergedData\u00a0=\u00a0(unsigned\u00a0char\u00a0*)malloc(4*CAMERA_WIDTH*CAMERA_HEIGHT*3\/2);\u00a0\/\/4\u4e2a\u753b\u9762\u5408\u5e76<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0memset(gYuvMergedData,\u00a00,\u00a04*CAMERA_WIDTH*CAMERA_HEIGHT*3\/2);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if\u00a0(pthread_create(&amp;gMergeThread,\u00a0NULL,\u00a0thread_merge,\u00a0NULL)!=0)\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeStart:\u00a0pthread_create\u00a0error.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for(int\u00a0cameraDataIndex=0;\u00a0cameraDataIndex&lt;MAX_MERGE_NUM;\u00a0cameraDataIndex++){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MergeDataDelete(gMergeData[cameraDataIndex].cameraId);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0free(gYuvMergedData);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a00;<\/div>\n<div>}<\/div>\n<div>int\u00a0MergeStop()\u00a0{<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0logI(TAG,\u00a0&#8220;MergeStop.&#8221;);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0gIsMergeFlag\u00a0=\u00a0false;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0if(gMergeThread\u00a0!=\u00a00){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(pthread_join(gMergeThread,\u00a0NULL)!=0){<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0logE(TAG,\u00a0&#8220;MergeStop:\u00a0pthread_join\u00a0error,\u00a0gMergeThread:&#8221;,\u00a0gMergeThread);<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0-1;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gMergeThread\u00a0=\u00a00;<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0}<\/div>\n<div>\u00a0\u00a0\u00a0\u00a0return\u00a00;<\/div>\n<div>}<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u56db\u8defNV12\uff08YUV420SP\uff09\u7684\u5e27\u62fc\u63a5\u6210\u4e00\u4e2aNV12\u7684\u5e27\uff0c\u5176\u539f\u7406\u5c31\u662f\u6839\u636eyuv\u6570\u636e\u7ec4\u6210\u65b9\u5f0f\uff0c\u628a\u6bcf\u8def\u5e27\u7684\u6570\u636e\u653e 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