bytestream2_init(&s->gb, avpkt->data, avpkt->size);
bytestream2_init_writer(&s->pb, s->decbuffer, s->size);
ret = decompress(&s->gb, AV_RL32(avpkt->data + 28) >> 1, &s->pb, s->lut);
if (ret < 0)
return ret;
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
bytestream2_init_writer(&s->pb, s->decbuffer, s->size);
ret = decompress(&s->gb, AV_RL32(avpkt->data + 28) >> 1, &s->pb, s->lut);
if (ret < 0)
return ret;