int32_t ff_mlp_pack_output(int32_t lossless_check_data,

                           uint16_t blockpos,

                           int32_t (*sample_buffer)[MAX_CHANNELS],

                           void *data,

                           uint8_t *ch_assign,

                           int8_t *output_shift,

                           uint8_t max_matrix_channel,

                           int is32)

{

    unsigned int i, out_ch = 0;

    int32_t *data_32 = data;

    int16_t *data_16 = data;



    for (i = 0; i < blockpos; i++) {

        for (out_ch = 0; out_ch <= max_matrix_channel; out_ch++) {

            int mat_ch = ch_assign[out_ch];

            int32_t sample = sample_buffer[i][mat_ch]

                          << output_shift[mat_ch];

            lossless_check_data ^= (sample & 0xffffff) << mat_ch;

            if (is32)

                *data_32++ = sample << 8;

            else

                *data_16++ = sample >> 8;

        }

    }

    return lossless_check_data;

}
