54     Mpg4dParser parser = NULL;  in mpg4d_init()
55     MppPacket task_pkt = NULL;  in mpg4d_init()
61     if (NULL == dec) {  in mpg4d_init()
67     if (NULL == stream) {  in mpg4d_init()
106         stream = NULL;  in mpg4d_init()
114     if (NULL == dec) {  in mpg4d_deinit()
122         p->parser = NULL;  in mpg4d_deinit()
131         p->stream = NULL;  in mpg4d_deinit()
138     if (NULL == dec) {  in mpg4d_reset()
154     if (NULL == dec) {  in mpg4d_flush()
165     if (NULL == dec) {  in mpg4d_control()
181     if (NULL == dec || NULL == pkt || NULL == task) {  in mpg4d_prepare()
198     if (NULL == p->stream) {  in mpg4d_prepare()
212         RK_U8 *dst = NULL;  in mpg4d_prepare()
288     if (NULL == dec || NULL == task) {  in mpg4d_parse()
324     if (NULL == dec || NULL == err_info) {  in mpg4d_callback()
329     MppFrame mframe = NULL;  in mpg4d_callback()