PREVIEW_INPUT_MEMORY
if (prev->input != PREVIEW_INPUT_MEMORY) {
if (prev->input == PREVIEW_INPUT_MEMORY)
if (prev->input == PREVIEW_INPUT_MEMORY) {
if (prev->input == PREVIEW_INPUT_MEMORY ||
if (prev->input == PREVIEW_INPUT_MEMORY)
prev->input = PREVIEW_INPUT_MEMORY;
if (prev->input == PREVIEW_INPUT_MEMORY)
if (prev->input == PREVIEW_INPUT_MEMORY)