void init_frame(Playback3DCommand *command, int is_yuv=0);
void write_buffer_sync(Playback3DCommand *command);
void draw_output(Playback3DCommand *command, int flip_y);
void init_frame(Playback3DCommand *command, int is_yuv=0);
void write_buffer_sync(Playback3DCommand *command);
void draw_output(Playback3DCommand *command, int flip_y);