static av_cold int ra144_encode_init(AVCodecContext * avctx) { RA144Context *ractx; int ret; if (avctx->channels != 1) { av_log(avctx, AV_LOG_ERROR, "invalid number of channels: %d\n", avctx->channels); return -1; } avctx->frame_size = NBLOCKS * BLOCKSIZE; avctx->delay = avctx->frame_size; avctx->bit_rate = 8000; ractx = avctx->priv_data; ractx->lpc_coef[0] = ractx->lpc_tables[0]; ractx->lpc_coef[1] = ractx->lpc_tables[1]; ractx->avctx = avctx; ret = ff_lpc_init(&ractx->lpc_ctx, avctx->frame_size, LPC_ORDER, FF_LPC_TYPE_LEVINSON); if (ret < 0) goto error; ff_af_queue_init(avctx, &ractx->afq); return 0; error: ra144_encode_close(avctx); return ret; }