ATOM Cam2 callback override

static uint32_t (*real_local_sdk_video_set_encode_frame_callback)(uint32_t param1,uint32_t param2)=NULL;
typedef uint32_t (* framecb)(uint32_t);

void *pfunccb=NULL;
int cnt=0;
char fname[255];
static uint32_t test_capture(void *param){
    // param is malloc'd pointer
    if( cnt < 1000) {
        fprintf(stderr,"callback!!!!!![%p]\n",param);
        uint32_t *ptr=(uint32_t *)param;
        uint32_t length=ptr[1];
        fprintf(stderr,"pack size=%d\n",length);
        sprintf(fname,"/media/mmc/stream",cnt);
        FILE *fp=fopen(fname,"wb");
        fseek(fp,0,SEEK_END);
        fwrite((void *)(*(uint32_t*)param),1,length,fp);
        fclose(fp);
        cnt++;
    }
    return ((framecb)pfunccb)((uint32_t)param);
}
uint32_t local_sdk_video_set_encode_frame_callback(uint32_t param1,uint32_t param2){
    void *handle;
	fprintf(stderr,"!!! injected local_sdk_video_set_encode_frame_callback !!!\n");
	fflush(stderr);

    if (real_local_sdk_video_set_encode_frame_callback == NULL){
        handle = dlopen ("/system/lib/liblocalsdk.so", RTLD_LAZY);
        if (!handle) {
            fputs (dlerror(), stderr);
        }
        real_local_sdk_video_set_encode_frame_callback = dlsym(handle, "local_sdk_video_set_encode_frame_callback");
        fprintf(stderr,"ptr=%d injected!!! err=%s\n",real_local_sdk_video_set_encode_frame_callback,dlerror());
	}
    fprintf(stderr,"param1=0x%x,param2=0x%x,*param2=0x%x",param1,param2,*(int32_t*)param2);
    if(param1==0){
        pfunccb=param2;
        fprintf(stderr,"ch0 func injection save pcb=0x%x\n",pfunccb);
        param2=(uint32_t)test_capture;
        fprintf(stderr,"override to 0x%x\n",param2);
    }
    int ret=real_local_sdk_video_set_encode_frame_callback(param1,param2);
	return ret;
}