static av_cold int mace_decode_init(AVCodecContext * avctx) { MACEContext *ctx = avctx->priv_data; if (avctx->channels > 2) return -1; avctx->sample_fmt = AV_SAMPLE_FMT_S16; avcodec_get_frame_defaults(&ctx->frame); avctx->coded_frame = &ctx->frame; return 0; }