UvcCamera:https://github.com/saki4510t/UVCCamera
stopPreview() ,屏幕最后一帧黑屏
UVCPreview.cpp -> clearDisplay(); 控制最后一帧屏幕清除. 屏蔽即可
int UVCPreview::stopPreview() {
ENTER();
bool b = isRunning();
if (LIKELY(b)) {
mIsRunning = false;
pthread_cond_signal(&preview_sync);
pthread_cond_signal(&capture_sync);
if (pthread_join(capture_thread, NULL) != EXIT_SUCCESS) {
LOGW("UVCPreview::terminate capture thread: pthread_join failed");
}
if (pthread_join(preview_thread, NULL) != EXIT_SUCCESS) {
LOGW("UVCPreview::terminate preview thread: pthread_join failed");
}
clearDisplay();
}
clearPreviewFrame();
clearCaptureFrame();
pthread_mutex_lock(&preview_mutex);
if (mPreviewWindow) {
ANativeWindow_release(mPreviewWindow);
mPreviewWindow = NULL;
}
pthread_mutex_unlock(&preview_mutex);
pthread_mutex_lock(&capture_mutex);
if (mCaptureWindow) {
ANativeWindow_release(mCaptureWindow);
mCaptureWindow = NULL;
}
pthread_mutex_unlock(&capture_mutex);
RETURN(0, int);
}
