Introduction to the principle of Android JB2 continuous shooting spin

<span id="Label3"></p>1. HAL Layer<br>(1) Alps\mediatek\platform\mt6589\hardware\camera\core\camshot\multishot\multishot.cpp Sleep to achieve spin down.<br>Handle Ecamshot_cmd_set_cshot_speed in Sendcommand. Ecamshot_cmd_set_cshot_speed defined in ALPS\MEDIATEK\PLATFORM\MT6589\HARDWARE\CAMERA\INC\CAMSHOT\_PARAMS.H.<br>Mbool<br>multishot::<br>SendCommand (MINT32 cmd, MINT32 arg1, MINT32 arg2, MINT32 arg3)<br>{<br>function_log_start;<br><br>Mbool ret = mtrue;<br>//<br>Switch (cmd)<br>{<br>Case Ecamshot_cmd_set_cshot_speed:<br>If (arg1 > 0)<br>{<br>Mu4shotspeed = arg1;<br>RET = mtrue;<br>}<br>Else<br>{<br>MY_LOGD ("set Invalid shot speed:%d", arg1);<br>RET = mfalse;<br>}<br>Break<br>Default<br>Break<br>}<br>//<br><br>function_log_end;<br>//<br>Return ret;<br>}<br><br>(2) the function of sending ecamshot_cmd_set_cshot_speed, in alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\scenario\shot\ continuousshot\continuousshot.cpp,<br>bool<br>continuousshot::<br>Oncmd_setcshotspeed (uint32_t U4cshotspeed)<br>{<br>BOOL ret = true;<br><br>Mutex::autolock Lock (mshotstopmtx);<br>If (!mbshotstoped && Mpmultishot!=null)<br>{<br>MY_LOGD ("set continuous shot speed:%d", u4cshotspeed);<br>ret = Mpmultishot->sendcommand (nscamshot::ecamshot_cmd_set_cshot_speed, u4cshotspeed, 0, 0);<br>}<br><br>Return ret;<br>}<br>At the same time, the SendCommand function in the file handles the ecmd_setcshotspeed passed Adapter. Ecmd_setcshotspeed defined in Alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\inc\scenario\shot\ishot.h<br>Case Ecmd_setcshotspeed:<br>ret = Oncmd_setcshotspeed (arg1);<br>Break<br><br>(3) Adapter sends Ecmd_setcshotspeed in the following File's function Setcshotspeed.<br>MtkPhotoCamAdapter.Capture.cpp (alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\mtkphoto):<br>MtkZsdNccCamAdapter.Capture.cpp (alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\mtkzsd\mtkzsdncc):<br>status_t<br>camadapter::<br>Setcshotspeed (int32_t I4cshotspeeed)<br>{<br>If (i4cshotspeeed <= 0)<br>{<br>My_loge ("can not set continuous shot speed as%d fps)", i4cshotspeeed);<br>Return bad_value;<br>}<br><br>sp<ishot> Pshot = mpshot;<br>If (pshot! = 0)<br>{<br>Pshot->sendcommand (ecmd_setcshotspeed, i4cshotspeeed, 0);<br>}<br><br>Return OK;<br>}<br><br>The Sendcommad function in the following file handles the camera_cmd_set_cshot_speed sent down by Jni.<br>MtkCamera.h (alps\mediatek\frameworks-ext\av\include\camera):<br>camera_cmd_set_cshot_speed,<br><br>MtkPhotoCamAdapter.cpp (alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\mtkphoto):<br>MtkZsdCcCamAdapter.cpp (alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\mtkzsd\mtkzsdcc):<br>MtkZsdNccCamAdapter.cpp (alps\mediatek\platform\mt6589\hardware\camera\hal\adapter\mtkzsd\mtkzsdncc):<br>Case Camera_cmd_set_cshot_speed:<br>return Setcshotspeed (arg1);<br><br>2. JNI Layer<br>(1) Android_hardware_camera.cpp (alps\frameworks\base\core\jni):<br>static void Android_hardware_camera_setcontinuousshotspeed (jnienv *env, jobject thiz, jint Value)<br>(2)<br>Static Jninativemethod cammethods[] = {<br>...<br>{"setcontinuousshotspeed",<br>"(I) V",<br>(void *) android_hardware_camera_setcontinuousshotspeed},<br>(3) Camera.java (alps\frameworks\base\core\java\android\hardware):<br>Public native void Setcontinuousshotspeed (int. speed);<br><p><p>Introduction to the principle of Android JB2 continuous shooting spin</p></p></span>